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Phased array transmission calibration method based on quadrature encoding waveforms

A technology of orthogonal coding and calibration method, applied in the field of calibration, can solve the problems of waste of time resources and processing resources, and achieve the effect of shortening the time of calibration and simplifying the calibration process

Active Publication Date: 2019-04-26
NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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Problems solved by technology

This method of emission calibration has caused a great waste of time resources and processing resources, and a new method of emission calibration is urgently needed to improve

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  • Phased array transmission calibration method based on quadrature encoding waveforms

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0016] see figure 1 , the system involved in the embodiment of the present invention includes the phased array antenna to be tested and the transmission signal control system connected to it, the calibration tower with far-field conditions built according to the position of the phased array antenna and the auxiliary antenna placed on it, the signal Transceiver system. Among them, the placement of the phased array antenna, the calibration tower and the auxiliary antenna placed on it must meet the far-field radiation conditions of the antenna, and the above two antennas must work in the same frequency band; the transmission signal control system is the phased array radar. The function is to receive external control signals to control the transmission signals of the phased ar...

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Abstract

The invention provides a phased array transmission calibration method based on quadrature encoding waveforms. A calibration tower is constructed, an auxiliary antenna and a signal transceiving systemare arranged on the calibration tower, quadrature encoding is utilized for generating N mutually quadrature transmitting waveforms, and transmitting signals of various channels are amplified and thensynthesized into a transmission wave beam; the auxiliary antenna receives the transmitting signals and transmits the signals to the signal transceiving system, and according to all obtained channel amplitude-phase value parameters, final array surface transmitting calibration is achieved. By transmitting several groups of mutually quadrature encoding waveforms, all transmitting channels of a full-digital active phased array antenna are synchronously calibrated, the calibration process is simplified, and the system calibration time is shortened.

Description

technical field [0001] The invention relates to a calibration method, which is mainly aimed at the simultaneous calibration of multiple transmission channels of an all-digital active phased array radar. Background technique [0002] Antenna calibration is very important for engineering solid-state active phased arrays. It can be used to regularly check the working status of active antennas and T / R components, and evaluate the performance of active antennas. The purpose of monitoring is to measure active components and compare them with the expected results to judge whether the active channel is good or bad; the purpose of calibration is to make the test results approach the original design intention of the antenna through closed-loop control. [0003] At present, the calibration of multiple receiving channels of all-digital active phased arrays mainly transmits parallel waves under far-field conditions through external radiation sources, and all receiving channels receive pa...

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Application Information

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IPC IPC(8): G01S7/40
CPCG01S7/4052
Inventor 季帅王敬东关炀王轶
Owner NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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