The disclosure relates to an active phased array antenna capable of realizing dual-band and dual polarization. The active phased array antenna is divided into a transmission and reception domain, which has a rectangular shape and in which transmission antenna elements and reception antenna elements are enabled, and a reception domain, which has a rectangular shape and is disposed outside the transmission and reception domain and in which the transmission antenna elements are disabled and the transmission antenna elements are enabled so that one substrate is allowed to simultaneously perform transmission and reception functions, thereby reducing the size of the antenna, and furthermore, improving polarization characteristics and tilt characteristics in a broad band.
H01Q 3/36 - 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 varying the phase by electrical means with variable phase-shifters
H01Q 5/40 - Imbricated or interleaved structuresCombined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
2.
Active phased array for performing dual-band and dual polarization
The disclosure relates to an active phased array antenna capable of realizing dual-band dual polarization. The active phased array antenna is divided into a transmission and reception domain, which has a rectangular shape and in which transmission antenna elements and reception antenna elements are enabled, and a reception domain, which has a rectangular shape and is disposed outside the transmission and reception domain and in which the transmission antenna elements are disabled and the transmission antenna elements are enabled so that one substrate is allowed to simultaneously perform transmission and reception functions, thereby reducing the size of the antenna, and simultaneously, improving polarization characteristics and tilt characteristics in a broad band.
H01Q 21/24 - Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
H01Q 5/40 - Imbricated or interleaved structuresCombined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
H01Q 21/06 - Arrays of individually energised antenna units similarly polarised and spaced apart
The disclosure relates to an antenna radiation device in which dual band and dual polarization are realized, and according to the disclosure, a high-frequency band antenna radiation device and a low-frequency band antenna radiation device are integrated, and power feeding slot substrates in which a high-frequency power feeding slot, a low-frequency power feeding slot, and a low-frequency radiation slot are formed are stacked, so that a high-frequency signal and a low-frequency signal may be transmitted and received through a single antenna radiation device and dual polarization may be implemented, using electromagnetic wave induction and coupling effects.
A radio altimeter includes a voltage controlled oscillator outputting a radio frequency signal through a forward path in a direction from the voltage controlled oscillator to a radio frequency antenna, a path extending unit positioned in the forward path to receive the radio frequency signal to delay the radio frequency signal to generate a delayed radio frequency signal. The radio frequency antenna transmits the delayed radio frequency signal to ground and receives the delayed radio frequency signal reflected from the ground. The radio altimeter also includes a mixer that receives the reflected delayed radio frequency signal through a signal reception path from the radio frequency antenna and the radio frequency signal from the voltage controlled oscillator and mixes the radio frequency signal and the reflected delayed radio frequency signal to output a beat frequency signal which is used to calculate altitude with respect to the ground.
G01S 13/34 - Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
G01S 13/32 - Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
G01S 13/18 - Systems for measuring distance only using transmission of interrupted, pulse modulated waves wherein range gates are used
An apparatus for processing a signal by means of electromagnetic waves according to one embodiment of the present invention can, when a radio frequency (RF) signal is radiated onto a medium through any one of a plurality of channels, simultaneously receive the radiated RF signals which have been reflected or scattered by the medium or have penetrated the medium through the plurality of channels other than the channel through which the RF signal has been radiated.
H01L 21/00 - Processes or apparatus specially adapted for the manufacture or treatment of semiconductor or solid-state devices, or of parts thereof
G01N 22/00 - Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more
G01R 29/08 - Measuring electromagnetic field characteristics
G01R 1/00 - Details of instruments or arrangements of the types covered by groups or
6.
APPARATUS FOR PROCESSING SIGNAL BY MEANS OF ELECTROMAGNETIC WAVES AND METHOD FOR CONTROLLING THE APPARATUS
An apparatus for processing a signal by means of electromagnetic waves according to one embodiment of the present invention can, when RF signals are irradiated onto a medium from any one channel from among a plurality of channels, simultaneously receive the irradiated RF signals which has been reflected or scattered due to the medium and which has penetrated the medium from the plurality of channels excluding the channel from which the RF signals have been irradiated.
G01N 27/00 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
A61B 5/05 - Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fieldsMeasuring using microwaves or radio waves
G01V 3/12 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation operating with electromagnetic waves
The present disclosure relates to a radio altimeter including a path extending unit positioned in a signal transmission path or a signal reception path of the radio altimeter, wherein the path extending unit delays a signal received from the outside to reduce a dynamic range of the radio altimeter.
G01S 13/34 - Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
G01S 13/32 - Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
G01S 13/18 - Systems for measuring distance only using transmission of interrupted, pulse modulated waves wherein range gates are used
The present invention relates to a radio altimeter and is characterized in the a path extension unit is interposed and mounted on a transmission path or a reception path of a signal in the radio altimeter, wherein the path extension unit comprises: an electro/optic (E/O) converter for converting an RF signal into an optical signal; an optic cable to be interposed on a path at a set length for extending an optical path; and an opto/electrical (O/E) converter for converting the optical signal to be outputted from the optic cable into the RF signal again. According to the present invention, by providing a sufficient path extension length through an optic cable, a pulse width limitation or a frequency band limitation of parts can be overcome, and a wide measurement range from a short distance to a middle or long distance can be effectively provided even though a radio altimeter of a certain method is used regardless of a measuring method, thereby improving the versatility of measuring equipment.
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