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Periodic amplitude control-based phased-array antenna system and wave beam control method

A phased array antenna and amplitude control technology, applied to antennas, antenna arrays, electrical components, etc., can solve problems such as high-cost phase shifting devices, and achieve the effects of improving reliability, reducing volume, and reducing hardware complexity

Active Publication Date: 2013-11-20
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a phased array antenna system based on periodic amplitude control, which solves the problem that current phased array antenna systems all use high-cost phase shifting The disadvantages of the device, using periodic amplitude modulation technology, no phase shifting device, and flexible amplitude and phase control

Method used

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  • Periodic amplitude control-based phased-array antenna system and wave beam control method

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Embodiment 1

[0061] Beam Pointing Control Based on Periodic Sine Wave Modulation

[0062] refer to figure 1 The designed phased array antenna system based on periodic amplitude control. In this embodiment, the antenna array is a uniform linear array, the number of array elements is N=10, and the array spacing is half a wavelength. The carrier frequency F of the radio frequency signal of the transmitted signal c =2GHz, the control period T of the variable gain amplifier p =10 -8 s, the control frequency F p = 100MHz. Due to periodicity control, the spectral components of the transmitted RF signal will be in F p It is periodic repetition, that is, after passing through the amplifier, the carrier frequency will be modulated to the frequency F c ±kF p , where k is an integer. Use the bandpass filter to select the topic where the carrier frequency is F c +F p weight.

[0063] Assume that the beam needs to be designed to point at 20°, and its side lobe level is less than -20dB. Use t...

Embodiment 2

[0066] Adaptive Beamforming Based on Periodic Sine Wave Modulation

[0067] refer to figure 1 The designed phased array system based on periodic amplitude control. In this embodiment, the antenna array is a uniform linear array, the number of array elements is N=10, and the array spacing is half a wavelength. The carrier frequency F of the radio frequency signal of the transmitted signal c =2GHz, the control period T of the variable gain amplifier p =10 -8 s, the control frequency F p = 100MHz. Use a bandpass filter to select the frequency F c +F p harmonic components. It is assumed that the array beam needs to be pointed at 30°, and at the same time, the interference signal in the direction of -40° is suppressed, that is, a null is formed in the direction of -40°. Assuming that the signal-to-noise ratio of the channel is -10dB, the signal and interference are irrelevant.

[0068] According to the linear constrained minimum variance method (LCMV) in adaptive signal pr...

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Abstract

The invention discloses a periodic amplitude control-based phased-array antenna system. The periodic amplitude control-based phased-array antenna system comprises a plurality of phased-array antenna unit passages, a combiner, a power divider, a frequency converter unit and a medium frequency band pass filter unit, wherein each phased-array antenna unit passage comprises an antenna, a first radio frequency band pass filter, a duplexer, a variable gain amplifier unit, a second radio frequency band pass filter and an amplifier control unit; and the amplifier control unit periodically controls the gain of the variable gain amplifier unit. The invention also discloses a wave beam control method of the periodic amplitude control-based phased-array antenna system. By periodically controlling the amplitude of a transmitted / received radio frequency signal, combined control over the amplitude and the phase of the phased-array antenna system is realized, and directional diagram synthesis and adaptive wave beam formation of a phased-array antenna array can be realized without using a phase shift device; and the periodic amplitude control-based phased-array antenna system can be widely applied to systems requiring flexible wave beam control such as phased-array radar and electronic countermeasure.

Description

technical field [0001] The invention belongs to the technical field of antenna engineering, in particular to a phased array antenna system based on periodic amplitude control which controls the amplitude and phase of signals. Background technique [0002] Phased array antenna systems are widely used in radar, navigation and electronic countermeasures and other engineering and technical fields. The basic principle of the phased array antenna system is to control the amplitude and phase of the transmitted and received signals on each array element of the phased array antenna array, so that the beam synthesized in space points to a specific direction, or forms a zero trap. It has the advantages of flexible beam pointing and comprehensive pattern. [0003] At present, the control method of the amplitude and phase of the signal transmitted and received by the phased array antenna system mainly uses variable gain amplifiers and phase shifters, such as the AN / APG-77 active phased...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q3/28H01Q3/34H01Q21/00
Inventor 贺冲曹岸杰梁仙灵金荣洪耿军平
Owner SHANGHAI JIAO TONG UNIV
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