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System and method for correcting on-orbit amplitude phase of phased-array antenna

A phased array antenna and correction system technology, applied in the field of signal processing, can solve the problems of large time overhead, multiple software and hardware resources, and high computational complexity, achieving the effect of small time overhead and improved accuracy

Active Publication Date: 2015-12-16
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology

[0009] The correction methods that support on-orbit applications include: REV, UTE, and CCE, etc., but these methods need to consume more software and hardware resources, and the time overhead is large; and based on power measurement correction methods, such as: REV method, there is a problem with power measurement Disadvantages of high sensitivity requirements and high computational complexity

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  • System and method for correcting on-orbit amplitude phase of phased-array antenna

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[0071] The Ka-band signal output by the microwave signal source is radiated to the phased array surface through the near-field beacon antenna, and the No. 1 channel is selected by the channel selection control logic, and the amplitude attenuation of the No. 1 channel is set to zero. Set the amplitude of the 7 channels to the maximum attenuation of 15dB. The signal enters the down-conversion module through the TR module where channel 1 is located (8 channels in total). Set the down-conversion output frequency to 76M, set the ADC sampling clock to 60M, and the digital The intermediate frequency is 16M. The amplitude and phase measurement module locally generates two orthogonal signals of SIN and COS with the same frequency as the digital intermediate frequency (both 16M) through the carrier NCO, and multiplies them respectively with the digital intermediate frequency signal to obtain two signals of I and Q. The Q two-way signals are integrated to filter out high-frequency compon...

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Abstract

The invention relates to a system and method for correcting an on-orbit amplitude phase of a phased-array antenna. A signal output by a microwave signal source and used for correcting is transmitted through a beacon antenna in a phased-array near field and received by a certain channel to be detected of the phased-array antenna; the output signal is subjected to down-conversion and AD acquisition; amplitude and phase measurement of the signal can be completed through a signal processing module; finally, the measured amplitude and phase of the signal are subjected to data processing; obtaining of the amplitude and the phase of the channel to be detected is completed; and amplitude phase correction is completed. According to the invention, on the basis of the beacon in the phased-array near field, with the help of an interference cancellation principle, the amplitude phase measurement influence to the channel to be detected by leaking (multipath) signals can be eliminated; the accuracy of a measurement result is increased; the implementation principle is simple; system software resources are saved; in the aspect of implementing amplitude phase measurement, a single-channel amplitude phase measurement scheme is selected and used; an auxiliary reference channel is not adopted; and thus, system hardware resources and the cost are saved.

Description

technical field [0001] The invention relates to a correction system and method, in particular to a phased array antenna on-track amplitude and phase correction system and method, belonging to the technical field of signal processing. Background technique [0002] The phased array antenna adopts the design of electromechanical integration, and the radiation unit, active channel, power distribution network and other components of the phased array antenna are composed, especially the active components, aging and temperature changes during in-orbit application will cause channel failure. Inter-gain consistency and phase consistency changes, which will affect the performance of the phased array antenna synthesis beam. Therefore, corresponding means must be provided to accurately measure and calibrate the amplitude-phase consistency between channels on a regular basis during on-orbit applications. [0003] Existing methods mostly focus on processing systems based on digital beamf...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/30
Inventor 郁彦利李成国蒙艳松徐连军陈旭阳王延光郑先安田步宁胡涛
Owner XIAN INSTITUE OF SPACE RADIO TECH
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