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A Phased Array Antenna On-orbit Amplitude and Phase Correction System and Method

A phased array antenna and correction system technology, applied in the field of signal processing, can solve problems such as large time overhead, multiple software and hardware resources, and high sensitivity requirements for power measurement, achieving the effect of small time overhead and improved accuracy

Active Publication Date: 2018-06-01
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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  • A Phased Array Antenna On-orbit Amplitude and Phase Correction System and Method
  • A Phased Array Antenna On-orbit Amplitude and Phase Correction System and Method
  • A Phased Array Antenna On-orbit Amplitude and Phase Correction System and Method

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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

A phased array antenna on-orbit amplitude and phase correction system and method. The output signal of the microwave signal source used for correction is transmitted through the beacon antenna located in the near field of the phased array, and is received by a channel to be tested of the phased array antenna. After the output signal is down-converted and collected by AD, the signal amplitude and phase measurement is completed by the signal processing module, and finally the measured signal amplitude and phase are processed to complete the acquisition of the amplitude and phase of the channel to be measured, and the amplitude and phase correction is completed . Based on the phased array near-field beacon, the present invention eliminates the influence of the leaked (multipath) signal on the amplitude and phase measurement of the measured channel by means of the principle of interference cancellation, improves the accuracy of the measurement result, and has a simple realization principle and saves System software resources. In the implementation of amplitude and phase measurement, a single-channel amplitude and phase measurement scheme is selected, and no auxiliary reference channel is used, which saves system hardware resources and costs.

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 Patents(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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