Abstract

In order to suppress the amount of time needed for the start-up of a microwave tube carried out when voltage fed from a power source has decreased, while avoiding increase in scale of a power storage unit, this power supply device includes: a power supply unit that supplies power fed from the power source to the microwave tube that is provided with a cathode, a heater for heating the cathode, an anode, and a collector; a power storage unit that stores the fed power and, if the voltage of the fed power decreases, supplies stored power that is power obtained by the power storing, to the microwave tube; and a power supply switching unit that, if the voltage of the fed power decreases, stops supplying the stored power to the anode and does not stop supplying the stored power to the heater.

IPC Classes  ?

• H01J 23/34 - Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
• H01J 25/34 - Travelling-wave tubesTubes in which a travelling wave is simulated at spaced gaps
• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

A microwave tube includes an electron gun that emits an electron beam; a magnetic circuit that focuses the electron beam emitted from the electron gun; a collector that captures the electron beam that has passed through the magnetic circuit; a high frequency circuit that is spirally arranged around the electron beam focused by the magnetic circuit and that transmits a high frequency; and a magnetic body part arranged around the electron gun so as to be movable in an emission direction of the electron beam. A high frequency output from the high frequency circuit is controlled to be constant by moving the magnetic body part in an emission direction of the electron beam.

IPC Classes  ?

• H01J 23/087 - Magnetic focusing arrangements
• H01J 23/06 - Electron or ion guns
• H01J 23/027 - Collectors

Abstract

A pillbox-type RF window having an input/output window in a microwave tube, the pillbox-type RF window includes a disc-shaped member having a metallization layer formed on an outer peripheral portion of a disc-shaped ceramic body; a pair of ring-shaped members constituted by metal bodies having substantially the same outer diameters as the disc-shaped member, arranged to sandwich the disc-shaped member from both sides, and integrated with the outer peripheral portion of the disc-shaped member; a tube-shaped member constituted by a metal body having an inner diameter substantially equal to the outer diameters of the pair of ring-shaped members and the disc-shaped member, for holding the pair of metal components and the disc-shaped member on an inside thereof; and a restriction member for suppressing rotation between the ring-shaped members and the tube-shaped member.

IPC Classes  ?

• H01P 1/08 - Dielectric windows
• H01J 23/36 - Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy
• H01P 5/02 - Coupling devices of the waveguide type with invariable factor of coupling

Abstract

In order to suppress the amount of time needed for the start-up of a microwave tube carried out when voltage fed from a power source has decreased, while avoiding increase in scale of a power storage unit, this power supply device includes: a power supply unit that supplies power fed from the power source to the microwave tube that is provided with a cathode, a heater for heating the cathode, an anode, and a collector; a power storage unit that stores the fed power and, if the voltage of the fed power decreases, supplies stored power that is power obtained by the power storing, to the microwave tube; and a power supply switching unit that, if the voltage of the fed power decreases, stops supplying the stored power to the anode and does not stop supplying the stored power to the heater.

IPC Classes  ?

• H01J 23/34 - Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Abstract

In order to suppress the amount of time needed for the start-up of a microwave tube carried out when voltage fed from a power source has decreased, while avoiding increase in scale of a power storage unit, this power supply device includes: a power supply unit that supplies power fed from the power source to the microwave tube that is provided with a cathode, a heater for heating the cathode, an anode, and a collector; a power storage unit that stores the fed power and, if the voltage of the fed power decreases, supplies stored power that is power obtained by the power storing, to the microwave tube; and a power supply switching unit that, if the voltage of the fed power decreases, stops supplying the stored power to the anode and does not stop supplying the stored power to the heater.

IPC Classes  ?

• H01J 23/34 - Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Abstract

Provided are: a microwave tube with which it is possible to suppress complication of structure, adjustment, etc., and to contribute to keeping high-frequency output of the microwave tube constant for a long period of time; and a method for controlling the microwave tube. The microwave tube comprises: an electron gun that discharges an electron beam; a magnetic circuit that focuses the electron beam discharged from the electron gun; a collector that captures the electron beam that has passed through the magnetic circuit; a high-frequency circuit that is arranged in a spiral shape around the electron beam focused in the magnetic circuit, and with which a high-frequency wave is propagated; and a magnetic body component arranged so as to be able to move in the discharge direction of the electron beam around the electron gun, the microwave tube being configured so that the magnetic body component is moved in the discharge direction of the electron beam, whereby high-frequency output outputted from the high-frequency circuit is controlled to be constant.

IPC Classes  ?

• H01J 23/02 - ElectrodesMagnetic control meansScreens
• H01J 23/20 - Cavity resonatorsAdjustment or tuning thereof

Abstract

Provided are: a microwave tube with which it is possible to suppress complication of structure, adjustment, etc., and to contribute to keeping high-frequency output of the microwave tube constant for a long period of time; and a method for controlling the microwave tube. The microwave tube comprises: an electron gun that discharges an electron beam; a magnetic circuit that focuses the electron beam discharged from the electron gun; a collector that captures the electron beam that has passed through the magnetic circuit; a high-frequency circuit that is arranged in a spiral shape around the electron beam focused in the magnetic circuit, and with which a high-frequency wave is propagated; and a magnetic body component arranged so as to be able to move in the discharge direction of the electron beam around the electron gun, the microwave tube being configured so that the magnetic body component is moved in the discharge direction of the electron beam, whereby high-frequency output outputted from the high-frequency circuit is controlled to be constant.

IPC Classes  ?

• H01J 23/20 - Cavity resonatorsAdjustment or tuning thereof

Abstract

A slow-wave circuit comprises: a waveguide comprising a meander-shaped part that transmits an electromagnetic wave and alternately repeats a first folded part and a second folded part folded onto the opposite side to the first folded part; and a beam hole that transmits an electron beam, extends in a predetermined direction, and penetrates the meander-shaped part, wherein the beam hole penetrates the meander-shaped part so that a part of the beam hole protrudes from the first folded part.

IPC Classes  ?

• H01J 23/16 - Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
• H01J 23/24 - Slow-wave structures
• H01J 25/34 - Travelling-wave tubesTubes in which a travelling wave is simulated at spaced gaps

Abstract

(A) An individual one of two or more terminals prepares a set of a first public key and a first private key. (B) One of the two or more terminals creates a set of a second public key and a second private key and distributes the second public key and the second private key to the other terminal(s). (C) One of the two or more terminals creates a shared key by using the corresponding first private key prepared in the (A) and the second public key shared in the (B). (D) A different terminal(s) of the two or more terminals creates a shared key used to communicate with the one terminal by using the second private key shared in the (B) and the first public key of the one terminal prepared in the (A). (E) The set of terminals performs an encryption communication(s) by using the shared keys.

IPC Classes  ?

• H04L 29/06 - Communication control; Communication processing characterised by a protocol
• H04L 9/32 - Arrangements for secret or secure communicationsNetwork security protocols including means for verifying the identity or authority of a user of the system
• H04L 9/08 - Key distribution
• H04L 9/40 - Network security protocols
• H04L 9/14 - Arrangements for secret or secure communicationsNetwork security protocols using a plurality of keys or algorithms

Abstract

To provide an electronic component housing apparatus that is able to efficiently cool the heat of a first and second electronic component, a first electronic component housing chamber 5000 houses the high voltage power supply module 100 (the first electronic component). A second electronic component housing chamber 6000 houses the TWT 200 (the second electronic component). At least some of a first partition plate 2500 and a second partition plate 2600 are provided so as to face each other. A first gap part G1 is provided between the first partition plate 2500 and the second partition plate 2600.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
• H05K 5/02 - Casings, cabinets or drawers for electric apparatus Details
• H05K 5/04 - Metal casings

Abstract

An invention comprises: a circular waveguide that has a cylindrical section having a circular pipe conduit with a circular shaped cross section, and side wall sections joined to the both sides in an axial direction of the cylindrical section; a first rectangular waveguide that has a first rectangular pipe conduit with a rectangular shaped cross section and that is joined to one of the side wall sections so that the first rectangular pipe conduit communicates with the circular pipe conduit; a second rectangular waveguide that has a second rectangular pipe conduit with a rectangular shaped cross section and that is joined to the other of the side wall sections so that the second rectangular pipe conduit communicates with the circular pipe conduit; and a dielectric plate that is configured as a plate shape, is disposed in the circular pipe conduit, and is airtightly held to the cylindrical section, wherein the circular waveguide has a plastically deformable section that is plastically deformable so that at least the length in an axial direction of the circular waveguide can be changed.

IPC Classes  ?

• H01P 1/08 - Dielectric windows

Abstract

Ringing of a signal after passing through a low pass filter in an LINC type linear amplifier is remedied. A linear amplifying device includes the linear amplifier including the low pass filter for removing high-frequency components; and an origin avoiding circuit which receives an original input signal and is provided upstream of the linear amplifier. If the original input signal is sampled in the vicinity of an origin, the origin avoiding circuit modifies a sampled value so at to replace the sampled value with a fixed value, and supplies the modified input signal to the linear amplifier.

IPC Classes  ?

• H03G 3/20 - Automatic control
• H03F 1/32 - Modifications of amplifiers to reduce non-linear distortion
• H03F 1/02 - Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
• H03F 3/24 - Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
• H03F 3/68 - Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
• H04L 27/36 - Modulator circuitsTransmitter circuits

Abstract

Provided is a slow-wave circuit and the like that contribute to achieving a wide band while reducing energy loss. The slow-wave circuit is provided with: a waveguide for transmitting electromagnetic waves, the waveguide including a meandering portion in which a first turned-back portion and a second turned-back portion turned back on the opposite side to the first turned-back portion are alternately repeated; and a beam hole for transmitting an electron beam, the beam hole extending in a predetermined direction and penetrating through the meandering portion. The beam hole penetrates through the meandering portion with a part of the beam hole disposed beyond the first turned-back portion.

IPC Classes  ?

• H01J 23/24 - Slow-wave structures

Abstract

A slow-wave circuit is provided with a folded waveguide and a beam hole. The beam hole is arranged between an edge and a center in the direction of width of the folded waveguide. The beam hole is preferably arranged at an edge in the direction of width of the folded waveguide, at a position that does not protrude beyond the folded waveguide. The beam hole is preferably arranged at a position separated by a prescribed distance from the edge in the direction of width of the folded waveguide.

IPC Classes  ?

• H01J 23/24 - Slow-wave structures
• H01J 25/38 - Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field the forward-travelling wave being utilised

Abstract

The purpose of the present invention is to provide: a wireless communication station having a modem capable of achieving adaptive coding rate and modulation during over-the-horizon communication; a system; a method; and a program. A wireless communication station (10) pertaining to the present invention is provided with: a demodulation unit (13) for carrying out demodulation and decoding on the basis of counterpart-station transmission control information included in a reception channel; a control unit (11) for generating, on the basis of a reception state, new counterpart-station transmission control information pertaining to control of transmission data of the counterpart-station (20); and a modulation unit (12) for carrying out coding and modulation on the basis of host-station transmission control information included in the reception channel and pertaining to control of transmission data of the host-station (10), and for transmitting the host-station transmission control information, the new counterpart-station transmission control information, and the transmission data together in a transmission channel (TC1). Whereas a modulation method and a coding rate are selected in a fixed manner in the existing state of the art, when this adaptive coding rate and modulation method is adopted, a frequency band can be effectively utilized and throughput can be optimized with respect to the frequency band.

IPC Classes  ?

• H04L 1/00 - Arrangements for detecting or preventing errors in the information received
• H04B 7/08 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
• H04L 27/00 - Modulated-carrier systems
• H04W 28/18 - Negotiating wireless communication parameters

Abstract

To suppress both influence of electron emission from a cathode side surface and consumption of energy to be supplied to a heater, while being provided with a grid, an electron gun of the present invention includes: a cathode capable of emitting electrons by heating; a grid capable of controlling the electron emission; and a cathode shield which is an conductor including a material portion located in the vicinity of a side surface of the cathode and facing at least a portion of the side surface via a gap or a heat insulating material, and not being made in direct physical coupling nor in direct physical contact with the cathode.

IPC Classes  ?

• H01J 29/48 - Electron guns
• H01J 37/075 - Electron guns using thermionic emission from cathodes heated by particle bombardment or by irradiation, e.g. by laser

Abstract

A cryptographic communication method comprises: (A) two or more terminals each preparing a set of a first public key and a first secret key; (B) one of the two or more terminals creating a set of a second public key and a second secret key, and delivering the set to another terminal;(C) the one of the two or more terminals, using the first secret key prepared in (A) and the second public key shared in (B), creates a common key; (D) the other of the two or more terminals, using the second secret key shared in (B) and the first public key of the one terminal prepared in (A), creates a common key for use in communication with the one terminal; and (E) a set of the terminals implementing cryptographic communication using the common key.

IPC Classes  ?

• H04L 9/08 - Key distribution
• H04L 9/32 - Arrangements for secret or secure communicationsNetwork security protocols including means for verifying the identity or authority of a user of the system

Abstract

Provided are a slow wave circuit and a traveling wave tube suitable for an increase in fineness with regard to processing beam holes, and suitable for higher frequencies. A slow wave circuit (10) includes a meandering waveguide (1) and a beam hole (2) that pierces the meandering waveguide (1), and the cross-section of the beam hole (2) in the direction orthogonal to the long direction is in the shape of a polygon having a larger number of sides than a quadrilateral.

IPC Classes  ?

• H01J 23/24 - Slow-wave structures
• H01J 25/42 - Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and with a magnet system producing an H-field crossing the E-field
• H01P 3/123 - Hollow waveguides with a complex or stepped cross-section, e.g. ridged or grooved waveguides
• H01J 23/28 - Interdigital slow-wave structuresAdjustment therefor
• H01P 11/00 - Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type

Abstract

To provide an electronic component housing apparatus that is able to efficiently cool the heat of a first and second electronic component, a first electronic component housing chamber 5000 houses the high voltage power supply module 100 (the first electronic component). A second electronic component housing chamber 6000 houses the TWT 200 (the second electronic component). At least some of a first partition plate 2500 and a second partition plate 2600 are provided so as to face each other. A first gap part G1 is provided between the first partition plate 2500 and the second partition plate 2600.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
• H05K 5/02 - Casings, cabinets or drawers for electric apparatus Details
• H05K 5/04 - Metal casings

Abstract

The purpose is to make it possible to autonomously suppress a reduction in an electron beam without providing a means for supervising the electron beam intensity of a monitor or the like. An electron gun, provided with: a heater (12) in which one terminal serves as a heater terminal (H) and the other terminal serves as a shared terminal (HK), and in which a low-voltage power supply (21) is connected between the terminals, the heater (12) generating heat due to a current being supplied from the low-voltage power supply (21); and a cathode electrode (11) connected to the shared terminal (HK) and heated by the heater (12) to discharge thermal electrons. A cathode current (Ik) due to the thermal electrons discharged from the cathode electrode (11), and a current (Ih) due to the low-voltage power supply, flow in opposite directions through the heater (12).

IPC Classes  ?

• H01J 23/02 - ElectrodesMagnetic control meansScreens
• H01J 23/08 - Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream
• H01J 23/04 - Cathodes
• H01J 23/34 - Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
• H01J 23/065 - Electron or ion guns producing a solid cylindrical beam
• H01J 23/087 - Magnetic focusing arrangements
• H01J 23/027 - Collectors
• H01J 23/06 - Electron or ion guns

Abstract

The purpose of the present invention is to correct an error from a design value due to variations and the like in component dimensional accuracy, assembly accuracy, or permittivity, and to maintain the design value. An RF window is provided with: a circular waveguide which includes a circular pipe portion having a circular conduit with a circular cross section, and side wall portions connected to both sides in an axial direction of the circular pipe portion; a first rectangular waveguide which includes a first rectangular conduit having a rectangular cross section and which is connected to one of the side wall portions so that the first rectangular conduit communicates with the circular conduit; a second rectangular waveguide which includes a second rectangular conduit having a rectangular cross section, and which is connected to the other of the side wall portions so that the second rectangular conduit communicates with the circular conduit; and a dielectric plate which is configured in a plate shape, disposed in the circular conduit, and hermetically retained in the circular pipe portion. The circular waveguide includes a plastically deformable portion which is plastically deformable so that at least the length in the axial direction of the circular waveguide can be changed.

IPC Classes  ?

• H01P 1/08 - Dielectric windows
• H01J 23/40 - Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit

Abstract

The objective of the invention is to provide a microwave tube, or the like, wherein gas adsorption action of a getter may be satisfactorily performed independently from a microwave amplification operation. In order to solve this problem, this microwave electron tube comprises: a helix wherein a microwave may progress oriented from an input section to an output section within a helical tube; an electron gun emitting an electron flow oriented toward the helix; a focusing device causing the electron flow to traverse the vicinity of the helix in the direction of a collector; the collector absorbing the electron flow; and a getter having a heater insulated from the cathode provided in the electron gun.

IPC Classes  ?

• H01J 23/00 - Details of transit-time tubes of the types covered by group

Abstract

The objective of the present invention is to ameliorate ringing of signals that have passed through a low pass filter in a LINC type linear amplifier. This linear amplifying device includes: a linear amplifier including a low pass filter which removes high-frequency components; and an origin avoiding circuit which receives an original input signal and is provided upstream of the linear amplifier. If the original input signal is sampled in the vicinity of the origin, the origin avoiding circuit modifies the sampled value by replacing the sampled value with a fixed value, and supplies the modified input signal to the linear amplifier.

IPC Classes  ?

• H03F 1/02 - Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
• H03F 3/24 - Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
• H03F 3/68 - Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
• H04L 27/36 - Modulator circuitsTransmitter circuits

Abstract

The present invention provides a delay circuit for securing a wide range of bandwidths in a folded waveguide. The delay circuit is provided with a folded waveguide and a beam hole. The beam hole is disposed between an end and the center in the width direction of the folded waveguide. The beam hole is preferably disposed at an end in the width direction of the folded waveguide, in a position that does not project beyond the folded waveguide. Also, the beam hole is preferably disposed in a position separated by a prescribed distance from the end in the width direction of the folded waveguide.

IPC Classes  ?

• H01J 23/24 - Slow-wave structures
• H01J 25/38 - Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field the forward-travelling wave being utilised

Abstract

Provided are a slow wave circuit and a traveling wave tube suitable for an increase in fineness with regard to processing beam holes, and suitable for higher frequencies. A slow wave circuit (10) includes a meandering waveguide (1) and a beam hole (2) that pierces the meandering waveguide (1), and the cross-section of the beam hole (2) in the direction orthogonal to the long direction is in the shape of a polygon having a larger number of sides than a quadrilateral.

IPC Classes  ?

• H01J 23/28 - Interdigital slow-wave structuresAdjustment therefor

Abstract

[Problem] To provide an electronic component housing apparatus that is able to efficiently cool the heat of a first and second electronic component, while inhibiting the incidence of the first electronic component being subjected to the heat of the second electronic component, which has a greater heat quantity than the first electronic component. [Solution] A case 2100 houses a high voltage power supply module 100 (the first electronic component) and a TWT 200 (the second electronic component), which has a heat quantity greater than that of the high voltage power supply module 100. A first electronic component housing chamber 5000 houses the high voltage power supply module 100. A second electronic component housing chamber 6000 houses the TWT 200. At least some of a first partition plate 2500 and a second partition plate 2600 are provided so as to face each other. A first gap part G1 is provided between the first partition plate 2500 and the second partition plate 2600.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

Provided are a traveling wave tube and a high-frequency circuit system such that the product life span of the traveling wave tube operating in multiple modes can be extended while variations in gain and amplification efficiency that accompany switching of the operation modes can be suppressed. The traveling wave tube comprises: an electron gun equipped with a cathode that releases electrons, and a heater that provides the cathode with heat energy for releasing the electrons; a helix causing an RF signal to interact with an electron beam formed from the electrons released by the electron gun; a collector for catching the electron beam emitted by the helix; an anode whereby the electrons released from the electron gun are guided into the helix; and a magnetic field application device for generating a magnetic field in order to change the diameter of the electron beam, said magnetic field application device being supplied with electric power for generating the magnetic field from the outside.

IPC Classes  ?

• H01J 25/34 - Travelling-wave tubesTubes in which a travelling wave is simulated at spaced gaps
• H01J 23/087 - Magnetic focusing arrangements
• H01J 23/04 - Cathodes
• H01J 23/065 - Electron or ion guns producing a solid cylindrical beam
• H01J 23/027 - Collectors

Abstract

The purpose is to make it possible to autonomously suppress a reduction in an electron beam without providing a means for supervising the electron beam intensity of a monitor or the like. An electron gun, provided with: a heater (12) in which one terminal serves as a heater terminal (H) and the other terminal serves as a shared terminal (HK), and in which a low-voltage power supply (21) is connected between the terminals, the heater (12) generating heat due to a current being supplied from the low-voltage power supply (21); and a cathode electrode (11) connected to the shared terminal (HK) and heated by the heater (12) to discharge thermal electrons. A cathode current (Ik) due to the thermal electrons discharged from the cathode electrode (11), and a current (Ih) due to the low-voltage power supply, flow in opposite directions through the heater (12).

IPC Classes  ?

• H01J 23/34 - Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for

Abstract

Provided is an adaptive equalization processing circuit with which an adaptive equalization process converges in a stable manner without reducing the transmission efficiency. This adaptive equalization processing circuit is characterized by being equipped with: a demodulation means that demodulates a received signal, and generates and outputs a training signal; an adaptive equalization processing means that uses a tap coefficient (generated using the received signal or the training signal) to perform an adaptive equalization process for removing waveform distortion in the received signal, and then outputs an equalization output signal; and a selection means that selects the training signal when the adaptive equalization processing means is in a non-convergent state, and inputs the training signal to the adaptive equalization processing means.

IPC Classes  ?

• H03H 7/30 - Time-delay networks
• H04L 25/03 - Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
• H04L 27/01 - Equalisers
• H04L 27/38 - Demodulator circuitsReceiver circuits

Abstract

Provided are a traveling wave tube and a high-frequency circuit system such that the product life span of the traveling wave tube operating in multiple modes can be extended while variations in gain and amplification efficiency that accompany switching of the operation modes can be suppressed. The traveling wave tube (2) comprises: an electron gun (10) equipped with a cathode (11) that releases electrons, and a heater (12) that provides the cathode (11) with heat energy for releasing the electrons; a helix (20) causing an RF signal to interact with an electron beam formed from the electrons released by the electron gun (10); a collector (30) for catching the electron beam emitted by the helix (20); an anode (40) whereby the electrons released from the electron gun (10) are guided into the helix (20); and a magnetic field application device (70) for generating a magnetic field in order to change the diameter of the electron beam, said magnetic field application device (70) being supplied with electric power for generating the magnetic field from the outside.

IPC Classes  ?

• H01J 23/06 - Electron or ion guns
• H01J 23/087 - Magnetic focusing arrangements
• H01J 23/34 - Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for

Abstract

Provided is an adaptive equalization processing circuit with which an adaptive equalization process converges in a stable manner without reducing the transmission efficiency. This adaptive equalization processing circuit is characterized by being equipped with: a demodulation means that demodulates a received signal, and generates and outputs a training signal; an adaptive equalization processing means that uses a tap coefficient (generated using the received signal or the training signal) to perform an adaptive equalization process for removing waveform distortion in the received signal, and then outputs an equalization output signal; and a selection means that selects the training signal when the adaptive equalization processing means is in a non-convergent state, and inputs the training signal to the adaptive equalization processing means.

IPC Classes  ?

• H04B 3/10 - Control of transmissionEqualising by pilot signal
• H04B 7/005 - Control of transmissionEqualising
• H04L 27/01 - Equalisers
• H04L 27/38 - Demodulator circuitsReceiver circuits

Abstract

An electron tube includes a shell that encloses a helix inside, and a plurality of support rods that support and fix the helix inside the shell, a part of each support rod that is in contact with an inner wall of the shell being covered with a conductive material, another part of each support rod that is in contact with the helix being covered with a dielectric material. The widths of conductive material of one end and another end of each support rod in a longitudinal direction are different, the side surface not being in contact with the shell nor the helix.

IPC Classes  ?

• H01J 23/26 - Helical slow-wave structuresAdjustment therefor
• H01J 23/30 - Damping arrangements associated with slow-wave structures, e.g. for suppression of unwanted oscillations
• H01J 25/34 - Travelling-wave tubesTubes in which a travelling wave is simulated at spaced gaps

Abstract

A traveling wave tube system includes a traveling wave tube, and a power supply device for supplying required power supply voltages to the respective electrodes of the traveling wave tube. The power supply device includes a control voltage generation circuit for generating a control voltage which is a negative DC voltage on the basis of a ground potential and supplying the control voltage to the anode, an anode voltage generation circuit for generating an anode voltage which is a negative DC voltage on the basis of the potential of the anode and supplying the anode voltage to the cathode, and a collector voltage generation circuit for generating a collector voltage which is a positive DC voltage on the basis of the potential of the cathode and supplying the collector voltage to the collector.

IPC Classes  ?

• H01J 23/02 - ElectrodesMagnetic control meansScreens
• H01J 23/34 - Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
• H01J 23/027 - Collectors
• H01J 25/34 - Travelling-wave tubesTubes in which a travelling wave is simulated at spaced gaps

Abstract

A temperature detection apparatus includes a transformer, a thermostat attached directly to an electrically conductive site of the heating element and has contacts that become short-circuited or come into an open-circuit condition depending on whether or not the temperature of the heating element is equal to or higher than a predetermined value, the contacts being connected to a secondary coil in the transformer, a DC voltage source and a transistor configured to supply required AC power to a primary coil in the transformer, a current detection resistor configured to detect a current flowing through the primary coil in the transformer, and a comparison circuit detecting a voltage generated across the current detection resistor when a current flows through the current detection resistor, the comparison circuit outputting an alarm signal when the current flowing through the primary coil in the transformer exceeds a preset threshold current.

IPC Classes  ?

• G01K 1/00 - Details of thermometers not specially adapted for particular types of thermometer
• G01K 13/00 - Thermometers specially adapted for specific purposes
• G01K 1/12 - Protective devices, e.g. casings for preventing damage due to heat overloading
• G01K 1/14 - SupportsFastening devicesArrangements for mounting thermometers in particular locations
• G01K 1/08 - Protective devices, e.g. casings

Abstract

A collector included in an electron tube is covered with a carbon nanotube layer over a required area on the surface thereof.

IPC Classes  ?

• H01J 23/02 - ElectrodesMagnetic control meansScreens

Abstract

A first resistor, a second resistor, a transistor, and a third resistor connected in series between a ground potential and an output terminal of a power circuit are provided. In addition, a current-detecting resistor is inserted in series between a high-voltage site and an output terminal of a power circuit that supplies a predetermined direct voltage to the high-voltage site. A differential amplifier controls a current flowing through the transistor so that a potential difference generated between both ends of the third resistor becomes proportional to a potential difference generated between both ends of the current-detecting resistor. At this point, by measuring the voltage of a connection node of the first resistor and the second resistor, the value of a current flowing through the high-voltage site can be calculated from the measured value.

IPC Classes  ?

• G01R 31/40 - Testing power supplies
• G01R 19/00 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof
• H01J 25/02 - Tubes with electron stream modulated in velocity or density in a modulator zone and thereafter giving-up energy in an inducing zone, the zones being associated with one or more resonators

Abstract

A temperature detection apparatus includes a transformer, a thermostat attached directly to an electrically conductive site of the heating element and has contacts that become short-circuited or come into an open-circuit condition depending on whether or not the temperature of the heating element is equal to or higher than a predetermined value, the contacts being connected to a secondary coil in the transformer, a DC voltage source and a transistor configured to supply required AC power to a primary coil in the transformer, a current detection resistor configured to detect a current flowing through the primary coil in the transformer, and a comparison circuit detecting a voltage generated across the current detection resistor when a current flows through the current detection resistor, the comparison circuit outputting an alarm signal when the current flowing through the primary coil in the transformer exceeds a preset threshold current.

IPC Classes  ?

• G01K 1/00 - Details of thermometers not specially adapted for particular types of thermometer
• G01K 13/00 - Thermometers specially adapted for specific purposes

Abstract

An electric current measurement apparatus for measuring an electric current of each electrode of an electron tube includes a transformer, a detection resistor connected in an ampere meter route for measurement, a voltage detection unit for detecting electric potential difference of the detection resistor and outputting pulse signals corresponding to the detected electric potential difference, a switching part for providing a short circuit of the secondary winding according to the pulse signals, and a measurement current value output unit. The measurement current value output unit measures pulse attribute of pulse-shape signals which are induced on the primary winding of the transformer caused by the short circuit of the secondary winding, and outputs a value of electric current flowing through the detection resistor with referring to a predetermined relationship between a value of the electric current flowing through the detection resistor and the pulse signals generated in the voltage detection unit.

IPC Classes  ?

• H02M 7/46 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode

Abstract

A voltage control apparatus used for an electron tube or a power supply apparatus includes a detecting circuit for detecting current flowing through a helix electrode, a voltage-limiting circuit for controlling a potential difference between the helix electrode and the anode electrode based on a predetermined voltage level; and a switch for switching based on an output from the detecting circuit. The switch connects the helix electrode and the anode electrode through the voltage-limiting circuit, or causes a short circuit between the helix electrode and the anode electrode.

IPC Classes  ?

• H01J 29/96 - One or more circuit elements structurally associated with the tube

Abstract

The present invention includes a Zener diode connected between a helix electrode and an anode electrode, a transistor that closes or opens a circuit between a cathode and an anode of the Zener diode, a photocoupler for turning ON/OFF the transistor through a phototransistor, a first switch for supplying or cutting off a DC voltage for the photodiode of the photocoupler, a capacitor to which the DC voltage that is to be supplied to the photodiode is applied and a control unit that turns ON the first switch beforehand to apply a DC voltage to the photocoupler and the capacitor and that turns OFF the first switch simultaneously with an application of a helix voltage.

IPC Classes  ?

• H01J 25/34 - Travelling-wave tubesTubes in which a travelling wave is simulated at spaced gaps

Abstract

A power supply apparatus for a traveling-wave tube includes an electrical discharge switch and a first resistor that are serially connected, and that are connected between a cathode electrode and a first collector electrode; N (N denotes a positive integer) arresters that are serially connected, and that are inserted between a ground potential and a connection node of the electrical discharge switch and the first resistor; N second resistors that are inserted between the N arresters and a second collector electrode to an Nth collector electrode and a ground potential, respectively; and an electrical discharge control circuit that turns off the electrical discharge switch at a time of normal operation of the power supply apparatus and turns on the electrical discharge switch when stopping operation of the power supply apparatus.

IPC Classes  ?

• H03B 9/08 - Generation of oscillations using transit-time effects using discharge tubes using a travelling-wave tube
• H03F 3/58 - Amplifiers using transit-time effect in tubes or semiconductor devices using travelling-wave tubes

Abstract

A bottom portion of a metal tape is attached to an end portion of a helix. A coaxial inner conductor for input or output of a high frequency signal is fixed by its end portion being interposed between upright surfaces of the metal tape. The metal tape is joined to the coaxial inner conductor by being laser-welded to opposite side surfaces of the coaxial inner conductor.

IPC Classes  ?

• H01J 25/34 - Travelling-wave tubesTubes in which a travelling wave is simulated at spaced gaps

Abstract

The present invention includes a waveguide for outputting radio frequency wave, a vacuum envelope provided with a slow-wave circuit, a coaxial connection part connecting the waveguide and the vacuum envelope, an insulating window member which is provided in the coaxial connection part and which hermetically seals a said of vacuum envelope and a said of waveguide, a coaxial center conductor of exterior portion with one end supported by the waveguide, and a coaxial center conductor of an interior portion with one end abutting on the slow-wave circuit and the other end connected to the coaxial center conductor of the exterior portion. The waveguide is provided with a screw part supporting the coaxial center conductor of the exterior portion movably in an axial direction of the coaxial center conductor of the exterior portion. An end portion of the coaxial center conductor of the exterior portion is connected to the end portion of the coaxial center conductor of the interior portion movably in the axial direction of the coaxial center conductor of the exterior portion.

IPC Classes  ?

• H01J 23/48 - Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit for linking interaction circuit with coaxial linesDevices of the coupled helices type
• H01P 5/103 - Hollow-waveguide/coaxial-line transitions

Abstract

At the time of restoration of the power supply after a power failure, a voltage higher than that in the normal operation mode is supplied to a heater. After a lapse of a predetermined time, the voltage to be supplied to the heater is switched into the voltage in the normal operation mode while a control signal for stating the operation of an electron tube is output. Alternatively, at the time of power activation, the rate of change of current flowing through a heater is determined for every period of time. When the rate of change becomes equal to or lower than a predetermined threshold, a voltage higher than that in the normal operation mode is supplied to the heater, and after a lapse of a predetermined time, the voltage to be supplied to the heater is switched into the voltage in the normal operation mode while a control signal for stating the operation of the electron tube is output.

IPC Classes  ?

• H05B 39/04 - Controlling

Abstract

The present invention includes: a transformer; a primary source for supplying an alternating voltage of at least two frequencies to a primary winding of the transformer; and a filter circuit connected to a secondary winding of the transformer and having an attenuation that varies according to the frequency of the alternating voltage, where the frequency of the alternating voltage supplied to the primary winding of the transformer is controlled so that a desired alternating voltage is outputted from the filter circuit connected to the secondary winding of the transformer.

IPC Classes  ?

• H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks

Abstract

A coaxial waveguide converter circuit is provided for converting an input/output coaxial section of a traveling-wave tube to a waveguide. The circuit comprises a waveguide matching part for connecting an inner conductor of the coaxial section extending into the waveguide to a wall of the waveguide. The waveguide matching part includes a fitting hole for fitting the inner conductor thereinto, and a plurality of cantilever supports which define the fitting hole at leading end portions thereof. The leading end portions of the plurality of cantilever supports defining the fitting hole are uniformly kept in close contact with a peripheral surface of the inner conductor.

IPC Classes  ?

• H01J 23/50 - Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit for linking interaction circuit with coaxial linesDevices of the coupled helices type the interaction circuit being a helix or derived from a helix
• H01P 5/103 - Hollow-waveguide/coaxial-line transitions

Abstract

A power supply apparatus has a series regulator for generating a predetermined power supply voltage from a DC voltage output from the rectifying circuit, and a capacitor bank of rectifying capacitors for stabilizing the power supply voltage. The power supply apparatus also has a charging bypass circuit connected between input and output terminals of the series regulator. The charging bypass circuit is turned on or off by an externally supplied drive signal, When a drop of the power supply voltage is detected, the charging bypass circuit is turned on.

IPC Classes  ?

• H05B 37/02 - Controlling
• H05B 39/04 - Controlling