Abstract

The present disclosure provides a calibration method. The calibration method includes operations of: dividing a phased array antenna to N groups, wherein each groups includes M antennas; disposing a probe above a center of an Xth group of the N groups; obtaining a first estimated amplitude and a first estimated phase of a radio wave radiated by a Yth antenna of the M antennas of the Xth group according to a first and a second configurations; obtaining a second estimated amplitude and a second estimated phase of the radio wave radiated by the Yth antenna of the M antennas of the Xth group according to the first and second configurations; and calibrating the Yth antenna according to the first estimated amplitude, the second estimated amplitude, the first estimated phase, and the second estimated phase.

IPC Classes  ?

• H01Q 3/26 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elementsArrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture

Abstract

The present disclosure provides an antenna device configured to transmit an output radio wave to other electronic device. The antenna device includes a stacked structure and a top printed circuit board. The stacked structure includes first radiators. The first radiators are configured to radiate an intermediate radio wave, and disposed on a top surface of the stacked structure. The top printed circuit board includes second radiators. The second radiators are configured to receive the intermediate radio wave and radiate the output radio wave according to the intermediate radio wave, and disposed on a bottom surface of the top printed circuit board. The bottom surface of the top printed circuit board is facing the top surface of the stacked structure.

IPC Classes  ?

• H01Q 9/04 - Resonant antennas

Abstract

The present disclosure provides a microwave device including a master generator, delay lines, and slave generators. The master generator is configured to generate a source RF signal so as to generate a master RF output. The delay lines are coupled to the master generator. The lave generators are coupled to the master generator through the delay lines and configured to generate slave RF outputs according to the source RF signal, respectively. The master RF output and the plurality of slave RF outputs are in phase.

IPC Classes  ?

• H05B 6/68 - Circuits for monitoring or control
• H05B 6/66 - Circuits
• H05B 6/70 - Feed lines

Abstract

The present disclosure provides satellite tracking systems and tracking methods. The satellite tracking system includes an array of antenna elements and a control unit. A feed current for each of the antenna elements passes through a phase shifter. The control unit generates a control signal for the phase shifter. The satellite tracking system searches, positions, and tracks a target satellite in accordance with the control signal. The satellite tracking systems and methods utilize step scanning and particle swarm optimization in the search stage, compensating for gaps formed during the satellite searching in the positioning stage, and conical scanning in the tracking stage.

IPC Classes  ?

• G01S 3/56 - Conical-scan beam systems using signals indicative of the deviation of the direction of reception from the scan axis
• G01S 3/44 - Systems for determining direction or deviation from predetermined direction using adjustment of real or effective orientation of directivity characteristic of an antenna or an antenna system to give a desired condition of signal derived from that antenna or antenna system, e.g. to give a maximum or minimum signal the adjustment being varied periodically or continuously until it is halted automatically when the desired condition is attained
• G01S 3/46 - Systems for determining direction or deviation from predetermined direction using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems
• G01S 3/48 - Systems for determining direction or deviation from predetermined direction using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems the waves arriving at the antennas being continuous or intermittent and the phase difference of signals derived therefrom being measured

Abstract

The present disclosure provides a microwave system, including a chamber and a microwave process circuit. The microwave process circuit is coupled to the chamber, and configured to radiate a polarized source microwave, receive a first reflected microwave, and radiate a polarized first reflected microwave into the chamber so as to heat a device under test in the chamber. The microwave process circuit includes a power generator, a first energy feeder, and a second energy feeder. The power generator is configured to generate a source microwave according to a reference signal and a control signal. The first energy feeder is configured to polarized the source microwave to the polarized source microwave, and radiate the polarized microwave into the chamber. The second energy feeder is configured to polarized the first reflected microwave to the polarized first reflected microwave, and radiate the polarized first reflected microwave into the chamber.

IPC Classes  ?

• G01R 31/28 - Testing of electronic circuits, e.g. by signal tracer
• G01R 31/319 - Tester hardware, i.e. output processing circuits

Abstract

An electronic device which includes a radome, a bottom cover connected to the radome, and a printed circuit board disposed between the radome and the bottom cover. The radome includes a top shell, an insulating member and at least one fastening members. The insulating member is made of expanded polystyrene and has at least one recess. The fastening member is embedded in the insulating member. The top shell covers the insulating member and includes polycarbonate.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
• H01Q 1/42 - Housings not intimately mechanically associated with radiating elements, e.g. radome
• H01B 3/44 - Insulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances plasticsInsulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances resinsInsulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances waxes vinyl resinsInsulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances plasticsInsulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances resinsInsulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances waxes acrylic resins
• H01Q 1/02 - Arrangements for de-icingArrangements for drying-out
• H05K 1/02 - Printed circuits Details

Abstract

The present disclosure relates to a satellite signal feeding module and circuit board structure. The circuit board includes a dielectric substrate, a plurality of grounding sheets, a plurality of top feed sheets, a plurality of bottom feed sheets, and a conductive layer. The dielectric substrate includes a main segment having an opening, a rib segment extending across a full width of the opening, and a plurality of extending segments connected to the main segment. The grounding sheets cover the rib segment and a majority portion of the main segment. The top feeding sheets and the bottom sheets cover the extending segments. The conductive layer is disposed in first holes disposed in the main segment and the rib segment for electrically coupling the grounding sheets. The conductive layer is further disposed in second holes in the extending segments for electrically coupling the top and bottom feeding sheets.

IPC Classes  ?

• H01P 3/12 - Hollow waveguides
• H05K 1/11 - Printed elements for providing electric connections to or between printed circuits
• H05K 1/02 - Printed circuits Details
• H01Q 1/50 - Structural association of antennas with earthing switches, lead-in devices or lightning protectors
• H05K 1/03 - Use of materials for the substrate

Abstract

The present disclosure provides a resampling apparatus and a resampling method. The resampling apparatus includes a control unit, a memory device, a resolution identifier, a phase rate generator, a coefficient generator, and a resample filter. The control unit controls reading and writing operations of the resampling apparatus according to a control signal. The memory device transmits the control signal to the control unit. The resolution identifier sets a resolution bandwidth identity according to an interpolation/decimation (I/D) value of the control signal. The phase rate generator generates a phase select signal and a counter enable signal according to the resolution bandwidth identity. The coefficient generator generates a coefficient select signal according to the resolution bandwidth identity. The resample filter generates a resampled output data according to the phase select signal, the coefficient select signal, and an input data.

IPC Classes  ?

• H03M 7/00 - Conversion of a code where information is represented by a given sequence or number of digits to a code where the same information is represented by a different sequence or number of digits
• H03H 17/06 - Non-recursive filters
• H03H 17/02 - Frequency-selective networks
• H03M 1/66 - Digital/analogue converters

Abstract

The present disclosure provides an electronic system including an electronic device and an electronic tag. The electronic device includes a printed circuit board. The electronic tag includes a substrate and an antenna, wherein the substrate is disposed at a height over the printed circuit board. The substrate has a first side and a second side, wherein the first side is opposite to the second side. The antenna has a first portion and a second portion, wherein the first portion is disposed on the first side, the second portion is to disposed on the second side, and the first portion is electrically coupled to the second portion via plated through holes.

IPC Classes  ?

• G06K 19/06 - Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
• G06K 19/077 - Constructional details, e.g. mounting of circuits in the carrier

Abstract

A communication device includes a circuit board having an upper surface and a lower surface, an upper housing disposed on the upper surface, and a lower housing disposed on the lower surface. The circuit board includes a top metal frame disposed on the upper surface, wherein the top metal frame defines a top cavity; a bottom metal frame disposed on the bottom surface, wherein the bottom metal frame defines a bottom cavity corresponding to the top cavity; a microstrip line disposed on the upper surface and extending into the top cavity; and a side coupler disposed on the lower surface and extending into the bottom cavity. The upper housing includes a depression corresponding to the top cavity, and the lower housing includes an aperture corresponding to the bottom cavity.

IPC Classes  ?

• H05K 7/02 - Arrangements of circuit components or wiring on supporting structure
• H01P 5/18 - Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers
• H01P 3/08 - MicrostripsStrip lines
• H05K 1/02 - Printed circuits Details
• H05K 5/00 - Casings, cabinets or drawers for electric apparatus
• H05K 1/18 - Printed circuits structurally associated with non-printed electric components
• H05K 7/04 - Arrangements of circuit components or wiring on supporting structure on conductive chassis

Abstract

The present disclosure provides a method for configuring a communication system with a variable attenuator. The method includes measuring a first attenuation accuracy of the communication system at a first attenuation rate of the variable attenuator, and setting the variable attenuator based on the first attenuation accuracy so that the variable attenuator has a second attenuation rate and the communication system has a second attenuation accuracy. The method further includes obtaining a plurality of first gains at first temperatures and first frequencies, and performing an interpolation process to obtain, from the plurality of first gains, a plurality of second gains at second temperatures and/or second frequencies. The method also includes building a three-dimensional gain table with respect to the temperature, the frequency and the attenuation rate.

IPC Classes  ?

• H04B 17/00 - MonitoringTesting
• H04B 17/21 - MonitoringTesting of receivers for calibrationMonitoringTesting of receivers for correcting measurements
• H04B 17/318 - Received signal strength
• H04B 1/04 - Circuits
• H03F 1/30 - Modifications of amplifiers to reduce influence of variations of temperature or supply voltage

Abstract

The present disclosure provides an antenna apparatus and a circuit board thereof for an RFD device to provide wide field effect coverage. The antenna apparatus includes a housing having a concavity defined therein, a printed circuit board disposed inside the concavity of the housing, two plates respectively located on opposite side portions of the circuit board, and a metal pattern sandwiched between and wirelessly coupled to the two plates. By disposing the metal pattern at the central portion of the circuit board and sandwiched between and coupled to the two plates, the field effect is enhanced, and the sensitivity of the antenna apparatus when detecting an object passing through the field (near field detection) is improved.

IPC Classes  ?

• H01Q 1/22 - SupportsMounting means by structural association with other equipment or articles
• H05K 5/04 - Metal casings
• H01Q 1/38 - Structural form of radiating elements, e.g. cone, spiral, umbrella formed by a conductive layer on an insulating support
• H05K 1/02 - Printed circuits Details
• H01Q 21/08 - Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along, or adjacent to, a rectilinear path
• H01Q 19/00 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
• H01Q 9/04 - Resonant antennas

Abstract

The present disclosure provides a waveguide apparatus for receiving wireless signals. The waveguide apparatus includes a first waveguide member and a second waveguide member attached to the first waveguide member to form a waveguide having an aperture for receiving wireless signals. The first waveguide member includes a first wall and a second wall forming a first corner of the aperture, and the second waveguide member includes a third wall and a fourth wall forming a third corner of the aperture. After the first waveguide member is attached to the second waveguide member, the second wall and the third wall form a second corner of the aperture, and the fourth wall and the first wall form a fourth corner of the aperture.

IPC Classes  ?

• H01P 3/12 - Hollow waveguides
• H01Q 13/06 - Waveguide mouths
• H01Q 13/02 - Waveguide horns

Abstract

A transmission switch includes a dielectric substrate; a conductive ground layer disposed over an upper surface of the dielectric substrate, wherein the conductive ground layer comprises a first ground section and a second ground section separated from the first ground section; a tunable dielectric layer disposed over the conductive ground layer, wherein the tunable dielectric layer has a first dielectric constant at a first DC voltage and a second dielectric constant at a second DC voltage; and a conductive signal layer disposed over the tunable dielectric layer, wherein the conductive signal layer comprises a first signal section, a second signal section, and an impedance-matching section connecting the first signal section and the second signal section.

IPC Classes  ?

• H01P 1/10 - Auxiliary devices for switching or interrupting
• H03H 7/38 - Impedance-matching networks
• H01P 3/16 - Dielectric waveguides, i.e. without a longitudinal conductor

Abstract

A switchable radiator includes a dielectric substrate, a first conductive layer having a slot disposed over an upper surface of the dielectric substrate, a tunable dielectric layer disposed over the first conductive layer, and a second conductive layer disposed over the tunable dielectric layer. The tunable dielectric layer has a first dielectric constant at a first DC voltage and a second dielectric constant at a second DC voltage. The second conductive layer includes a first signal section, a second signal section, and an impedance-matching section connecting the first signal section and the second signal section. The operation method of the switchable radiator includes applying a first DC voltage to the tunable dielectric layer to enable the switchable radiator to radiate energy through the slot and applying a second DC voltage to the tunable dielectric layer to disable the switchable radiator from radiating energy through the slot.

IPC Classes  ?

• H01P 3/16 - Dielectric waveguides, i.e. without a longitudinal conductor
• H01P 3/12 - Hollow waveguides

Abstract

The present disclosure provides a waveguide transition structure for receiving satellite signals, which can be implemented in a low noise block down-converter. In some embodiments of the present disclosure, the low noise block down-converter includes a feed horn structure having at least a first waveguide extending along a first direction, a housing having at least a second waveguide extending along a second direction and communicating with the first waveguide, and a circuit board positioned within the housing. The second direction is substantially not in parallel to the first direction. The circuit board has a receiving pin configure to receive microwave signals propagating in the second waveguide.

IPC Classes  ?

• H01P 5/00 - Coupling devices of the waveguide type
• H01Q 1/38 - Structural form of radiating elements, e.g. cone, spiral, umbrella formed by a conductive layer on an insulating support
• H01Q 5/55 - Feeding or matching arrangements for broad-band or multi-band operation for horn or waveguide antennas
• H01Q 9/04 - Resonant antennas
• H01Q 13/02 - Waveguide horns
• H01Q 19/17 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave the primary radiating source comprising two or more radiating elements

Abstract

The present disclosure provides a satellite signal reception system comprising a low noise block down-converter for receiving satellite signals; a plurality of receivers configured to transmit the satellite signals from the low noise block down-converter to a display device; and a power splitter. The power splitter includes a first port electrically connected to the low noise block down-converter via a single cable; a plurality of second ports electrically connected to the plurality of receivers; a signal-distributing circuit electrically connecting the first port to the plurality of second ports; a plurality of power-supplying circuits electrically connecting the plurality of second ports to the first port; and a command-transmitting circuit electrically connecting the plurality of second ports to the first port, wherein the command-transmitting circuit includes a controller unit programmed to forward DiSEqC commands from the plurality of second ports to the first port in a first-in-first-out manner.

IPC Classes  ?

• H04N 21/443 - OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
• H04H 20/22 - Arrangements for broadcast of identical information via plural broadcast systems

Abstract

An outdoor unit includes a dish antenna and a low noise block converter positioned at a focus point of the dish antenna. The low noise block converter comprises a housing, a feed cap disposed on top of the housing, and an air permeable membrane disposed on a bottom portion of the housing. The housing includes a base portion, at least one feed horn protruding from the base portion, and a bottom cover attached to a bottom of the base portion so as to form a housing cavity, wherein the bottom cover has a vent hole forming a flow path between the housing cavity and an external environment. The feed cap is disposed on a feed portion of the at least one feed horn and the air permeable membrane is disposed over the vent hole and coupled to the bottom cover via an adhesive, wherein the membrane is configured to permit egress of a gas from the housing cavity therethrough.

IPC Classes  ?

• H01Q 13/00 - Waveguide horns or mouths Slot antennas Leaky-waveguide antennas Equivalent structures causing radiation along the transmission path of a guided wave
• H01Q 13/02 - Waveguide horns
• H01Q 19/13 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave the primary radiating source being a single radiating element, e.g. a dipole, a slot, a waveguide termination
• H01Q 19/17 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave the primary radiating source comprising two or more radiating elements

Abstract

A method of multipath compensation for digital pre-distortion (DPD) linearization suppresses linear distortion caused by reflected signals and distortion in transmitting and receiving paths. Reflection suppression suppresses effects of the linear distortion on the transmitting and receiving paths.

IPC Classes  ?

• H04L 25/03 - Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
• H04B 1/04 - Circuits

Abstract

A multi-layer circuit board with a waveguide to microstrip transition structure includes a laminated structure having a plurality of dielectric layers, a top metal frame disposed over the laminated structure, a microstrip line disposed over the laminated structure, a bottom metal frame underlying the laminated structure, and a plurality of conductors electrically connecting the top metal frame and the bottom metal frame. The top metal frame defines a top cavity, the bottom metal frame defines a bottom cavity corresponding to the top cavity, and the microstrip line extends into the top cavity. The laminated structure includes an upper dielectric layer and at least one lower dielectric layer, wherein top cavity exposes a top surface of the upper dielectric layer, and the bottom cavity exposes a bottom surface of the at least one lower dielectric layer.

IPC Classes  ?

• H03H 5/00 - One-port networks comprising only passive electrical elements as network components
• H01P 5/08 - Coupling devices of the waveguide type for linking lines or devices of different kinds

Abstract

A Dynamic Digital Pre-Distortion (DDPD) system is disclosed to rapidly correct power amplifier (PA) non-linearity and memory effects. To perform pre-distortion, a DDPD engine predistorts an input signal in order to cancel PA nonlinearities as the signal is amplified by the PA. The DDPD engine is implemented as a composite of one linear filter and N−1 high order term linear filters. The bank of linear filters have programmable complex coefficients. To compute the coefficients, samples from the transmit path and a feedback path are captured, and covariance matrices A and B are computed using optimized hardware. After the covariance matrices are computed, Gaussian elimination processing may be employed to compute the coefficients. Mathematical and hardware optimizations may be employed to simplify and reduce the number of multiplication operands and other operations, which can enable the DDPD system to fit within a single chip.

IPC Classes  ?

• H04K 1/02 - Secret communication by adding a second signal to make the desired signal unintelligible
• H04L 25/03 - Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
• H04L 25/49 - Transmitting circuitsReceiving circuits using code conversion at the transmitterTransmitting circuitsReceiving circuits using predistortionTransmitting circuitsReceiving circuits using insertion of idle bits for obtaining a desired frequency spectrumTransmitting circuitsReceiving circuits using three or more amplitude levels

Abstract

An integral high frequency communication apparatus comprises a case, a waveguide apparatus having an extension portion, and a circuit board having a signal transmitting unit and a signal receiving unit. The transceiver module having two waveguide openings is retained in the case. The case has an opening through which the extension portion extends outside of the case. The integral high frequency communication apparatus can receive and transmit high frequency signals by the extension portion.

IPC Classes  ?

• H01Q 13/00 - Waveguide horns or mouths Slot antennas Leaky-waveguide antennas Equivalent structures causing radiation along the transmission path of a guided wave
• H01Q 1/24 - SupportsMounting means by structural association with other equipment or articles with receiving set
• H01Q 13/02 - Waveguide horns
• H01Q 19/12 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave
• H01Q 21/28 - Combinations of substantially independent non-interacting antenna units or systems

Abstract

A Dynamic Digital Pre-Distortion (DDPD) system is disclosed to rapidly correct power amplifier (PA) non-linearity and memory effects. To perform pre-distortion, a DDPD engine predistorts an input signal in order to cancel PA nonlinearities as the signal is amplified by the PA. The DDPD engine is implemented as a composite of one linear filter and N−1 high order term linear filters. The bank of linear filters have programmable complex coefficients. To compute the coefficients, samples from the transmit path and a feedback path are captured, and covariance matrices A and B are computed using optimized hardware. After the covariance matrices are computed, Gaussian elimination processing may be employed to compute the coefficients. Mathematical and hardware optimizations may be employed to simplify and reduce the number of multiplication operands and other operations, which can enable the DDPD system to fit within a single chip.

IPC Classes  ?

• H04L 27/00 - Modulated-carrier systems

Abstract

A band pass filter combiner carrying a broadband signal with a central frequency comprises a power divider, a high pass band filter, a low pass band filter, and a power combiner. The distance from the signal input port of the power divider to each of signal input ports of the high pass band filter and the low pass band filter is equal to a quarter of the wavelength at the central frequency. The distance from each of signal output ports of the high pass band filter and the low pass band filter to the signal output port of the power combiner is also equal to a quarter of the wavelength at the central frequency.

IPC Classes  ?

• H01P 5/12 - Coupling devices having more than two ports

Abstract

A low noise block converter includes a first printed circuit board, a second printed circuit board, and a housing. The first printed circuit board includes a metal layer disposed on a surface of the first printed circuit board. The second printed circuit board includes at least one chip. The housing includes a support surface configured to support the first printed circuit board, and a cavity formed on the support surface and configured to receive the second printed circuit board, wherein the first printed circuit board is placed on the support surface with the metal layer facing the cavity for shielding the electromagnetic fields radiated from the at least one chip.

IPC Classes  ?

• H05K 9/00 - Screening of apparatus or components against electric or magnetic fields

Abstract

An out-door unit with multiple ports comprises a circuit block, a DC-DC converter and a plurality of ports. The DC-DC converter is configured to provide a first current to the circuit block. The plurality of ports is connected to a plurality of in-door units respectively via a diode and provides a second current from the plurality of in-door units to the DC-DC converter via a diode respectively. The circuit block requires an operation current, and a first part of the operation current is the first current from the DC-DC converter and a second part of the operation current is the second current from one of the ports.

IPC Classes  ?

• H02J 3/14 - Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading

Abstract

A polarizer includes a waveguide channel having a substantially square cross section and a septum disposed within the waveguide channel. The septum includes a stepped edge and two opposite stepped surfaces. The stepped surfaces are sectionally recessed toward each other along the direction pointing toward the interior of the waveguide channel, wherein the number of the steps of the stepped surface is greater than two, but smaller than the number of the steps of the stepped edge. In one embodiment, the square cross section may include a plurality of rounded corners and a plurality of edges extending correspondingly between the rounded corners, wherein the ratio of the radius of the rounded corner to the distance between two opposite edges is in a range of from 0.05 to 0.3.

IPC Classes  ?

• H01Q 19/00 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
• H01Q 13/00 - Waveguide horns or mouths Slot antennas Leaky-waveguide antennas Equivalent structures causing radiation along the transmission path of a guided wave

Abstract

A system and method for dynamic adjustment of drain or collector voltage of a power amplifier (PA), including a PA having a voltage input, a temperature sensor measuring ambient temperature of the PA, and an adaptive PA control processor that dynamically changes the input voltage based on the ambient temperature, achieving a desired peak power when the system is subjected to high temperatures. In a further embodiment, a power sensor measures output power of the PA, and the control processor dynamically changes the voltage based on output power when the system serves a large cell in a mobile communication infrastructure employing high power. In a further embodiment, a multistage PA and method include amplifier stages having drain or collector voltage inputs, wherein a voltage applied to the inputs are set so as to be proportional to the peak power requirements of each stage, enhancing overall efficiency.

IPC Classes  ?

• H03G 3/30 - Automatic control in amplifiers having semiconductor devices

Abstract

An integral high frequency communication apparatus comprises a case, a waveguide apparatus having an extension portion, and a transceiver module having two waveguide openings. The transceiver module having two waveguide openings is retained in the case. The case has an opening through which the extension portion extends outside of the case. The integral high frequency communication apparatus can receive and transmit high frequency signals by the extension portion.

IPC Classes  ?

• H01Q 13/00 - Waveguide horns or mouths Slot antennas Leaky-waveguide antennas Equivalent structures causing radiation along the transmission path of a guided wave

Abstract

A low-noise block converter comprises a low-noise amplifier, a local oscillator, a mixer, an IF-amplifier and a regulator. The low-noise amplifier amplifies a high-band received signal. The local oscillator generates a local-frequency signal. The mixer transforms the high-band received signal into an intermediate-frequency signal by mixing the high-band received signal with the generated local-frequency signal. The IF-amplifier amplifies the intermediate-frequency signal. The regulator is connected to the IF-amplifier to provide a steady current (or voltage) to the local oscillator, the mixer and the low-noise amplifier.

IPC Classes  ?

• H04B 1/26 - Circuits for superheterodyne receivers

Goods & Services

Satellite TV signal converters; video receivers; satellite low noise amplifiers (LNA); satellite TV signal receiver; satellite TV deciphers; radars; antennas; wing antennas; audio, video and satellite signal receivers; wireless telecommunications transmitters; wireless audio and video receivers; signal converters; wireless intermediate telecommunications transmitters; wireless intermediate audio and video receivers; wireless audio, video and satellite receivers; wireless telecommunications base stations for cellular and fixed networking and communications applications; audio and video signal receivers; satellite signal communication processors; global positioning satellite receivers; global positioning satellite transmitters; satellite signal receivers; power amplifiers

Goods & Services

Satellite TV signal converter; video receiver; satellite low noise amplifier (LNA); satellite TV signal receiver; satellite TV decipher; radar; antenna; wing antenna; signal receiver; wireless transmitter; wireless receiver; signal converter; wireless intermediate transmitter; wireless intermediate receiver; wireless signal receiver; satellite antenna; satellite antenna holder; satellite antenna receiver; wireless base station; signal receiver; satellite signal communication processor; global positioning satellite receiver; global positioning satellite transmitter; satellite signal receiver; power amplifier.

Abstract

A Dynamic Digital Pre-Distortion (DDPD) system is disclosed to rapidly correct power amplifier (PA) non-linearity and memory effects. To perform pre-distortion, a DDPD engine predistorts an input signal in order to cancel PA nonlinearities as the signal is amplified by the PA. The DDPD engine is implemented as a composite of one linear filter and N−1 high order term linear filters. The bank of linear filters have programmable complex coefficients. To compute the coefficients, samples from the transmit path and a feedback path are captured, and covariance matrices A and B are computed using optimized hardware. After the covariance matrices are computed, Gaussian elimination processing may be employed to compute the coefficients. Mathematical and hardware optimizations may be employed to simplify and reduce the number of multiplication operands and other operations, which can enable the DDPD system to fit within a single chip.

IPC Classes  ?

• H04K 1/02 - Secret communication by adding a second signal to make the desired signal unintelligible
• H04L 25/03 - Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
• H04L 25/49 - Transmitting circuitsReceiving circuits using code conversion at the transmitterTransmitting circuitsReceiving circuits using predistortionTransmitting circuitsReceiving circuits using insertion of idle bits for obtaining a desired frequency spectrumTransmitting circuitsReceiving circuits using three or more amplitude levels

Abstract

A system and method for dynamic adjustment of drain or collector voltage of a power amplifier (PA), including a PA having a voltage input, a temperature sensor measuring ambient temperature of the PA, and an adaptive PA control processor that dynamically changes the input voltage based on the ambient temperature, achieving a desired peak power when the system is subjected to high temperatures. In a further embodiment, a power sensor measures output power of the PA, and the control processor dynamically changes the voltage based on output power when the system serves a large cell in a mobile communication infrastructure employing high power. In a further embodiment, a multistage PA and method include amplifier stages having drain or collector voltage inputs, wherein a voltage applied to the inputs are set so as to be proportional to the peak power requirements of each stage, enhancing overall efficiency.

IPC Classes  ?

• H03F 3/04 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only

Abstract

An electromagnetic interference shielding apparatus for a signal transceiver employs two folded-edge mechanisms coupled together and an adhesive. The electromagnetic interference shielding apparatus includes a metal cover, a chassis having a waveguide output hole, and an adhesive. A first combination portion having a first curved section is disposed on an edge of the metal cover. A second combination portion having a second curved section corresponding to the first combination portion is disposed on an edge of the chassis. The adhesive is used to combine the first combination portion and the second combination portion. The waveguide output hole outputs a signal transmitted by the signal transceiver. The first combination portion and the second combination portion form a curved space that is used with the adhesive to prevent leakage of the transmitted signal and the interference of external noises.

IPC Classes  ?

• H05K 9/00 - Screening of apparatus or components against electric or magnetic fields

Abstract

A crest reduction system and method. The inventive system includes a first circuit for suppressing peak amplitudes of an input signal and providing a peak amplitude suppressed signal in response thereto and a second circuit coupled to the first circuit for rejecting intermodulation distortion in the amplitude suppressed signal. In the illustrative implementation, the first circuit is a peak amplitude suppressor having circuitry for computing an amplitude of the input signal and for computing a gain factor for the input signal in response thereto. In the best mode, the gain factor is obtained from a lookup table. The peak amplitude suppressor further includes a multiplier for applying the gain factor to the input signal. In the illustrative embodiment, the second circuit includes a plurality of bandpass filters and a summer for combining the outputs thereof.

IPC Classes  ?

• H04K 1/10 - Secret communication by using two signals transmitted simultaneously or successively

Goods & Services

Microwave products, digital microwave radio transceivers, VSAT system network, portable satellite communication system, TVRO/DBS products, MARISAT systems, microwave components and communication and telecommunication products.

Goods & Services

digital microwave radio transceivers, VSAT (Very Small Aperture Terminal) system network comprising satellite, ground station transmitters and receivers and data processing apparatus, TVPD/DBS (Television Receiving Only/Direct Broadcasting System) products comprising feed-horns, down-converters, dish antenna and receivers, Marisat (Maritime Satellite) system comprising transmitters, receivers, antenna and down-converters, portable satellite communication apparatus and parts therefor