A Phased Array Amplitude and Phase Calibration System
A calibration system and phased array technology, applied in the field of radar, can solve problems such as radiator inconsistency, transceiver front-end channel inconsistency, inconsistency, etc.
Active Publication Date: 2021-02-19
无锡国芯微电子系统有限公司
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Problems solved by technology
In the actual application process, errors caused by the inconsistency of the radiator, the inconsistency caused by the installation of the radiator, the inconsistency of the front-end channel of the transceiver, the inconsistency of the power combiner channel, and the inconsistency caused by the installation of components such as the combiner will cause errors. So that the phase and amplitude distribution of the entire antenna array is not a plane, please refer to the schematic diagram of the phase amplitude difference figure 1 , the beam pointing of the entire phased array radar will be affected to a certain extent
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[0026] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0027] This application discloses a phased array amplitude and phase calibration system, please refer to figure 2 , The phased array amplitude and phase calibration system includes a phased array to be calibrated, a controller, a vector network analyzer, a slide table and an X-band test antenna. The controller can be implemented by a computer, and the controller is loaded with test software. The system can realize the calibration of the amplitude and phase of the phased array. It mainly includes two parts: hardware platform and software control:
[0028] The phased array to be calibrated includes N channels to be calibrated, and each channel to be calibrated includes an array element antenna and a transceiver component connected thereto, and the transceiver component includes at least a phase shifter, an attenuator, and a transceiver switch...
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The invention discloses a phased array amplitude and phase calibration system, which relates to the field of radar technology. The system includes a test antenna installed on a slide table and facing a channel to be calibrated in the phased array to be calibrated, and a controller controls the movement of the slide table. And the sequential opening of each channel to be calibrated, the vector network analyzer is connected to the test antenna to send signals, connected to the phased array to be calibrated to obtain the received signal of each channel to be calibrated, and the phase and amplitude of each channel to be calibrated are respectively balanced according to the minimum value , the system can trim and calibrate the phase and amplitude of the phased array to be calibrated, so as to eliminate the phase and amplitude gap of each element antenna in the antenna array, improve the synthesis efficiency of the overall array, and have high calibration accuracy and calibration speed .
Description
technical field [0001] The invention relates to the technical field of radar, in particular to a phased array amplitude and phase calibration system. Background technique [0002] Active phased array radar adopts a distributed feed network, which consists of an array element antenna and subsequent transceiver components (T / R components) to form a large antenna array. The transceiver components integrate phase shifters, attenuators, amplifiers, etc. The component forms a transmitting channel and a receiving channel inside, and is responsible for controlling the phase and power output by the corresponding array element antenna. Each array element antenna and its connected transceiver components form a channel in the antenna array. The entire antenna array includes multiple channels. [0003] After combining to form the antenna array, the power of the overall antenna array is increased after the space synthesis of each element antenna, thereby increasing the working distance o...
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IPC IPC(8): G01S7/40
CPCG01S7/4004
Inventor 吕建行冯仁杰魏一平
Owner 无锡国芯微电子系统有限公司