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Internal calibration method for phased-array antenna transmit/receive (T/R) components

A phased array antenna, internal calibration technology, applied in the antenna radiation pattern, electrical components, digital transmission system and other directions, can solve the problem of large difference in power supply load, calibration error and so on

Active Publication Date: 2013-07-24
INST OF ELECTRONICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The principle and signal processing of this method are relatively simple, but the power load during calibration is quite different from the actual working time, and the amplitude and phase characteristics of the T / R components at this time may be different from the performance when all components are working; due to the complex The signal is the sum of the signals from all T / R components. If some T / R components cannot be closed due to aging or failure, it will cause a large error in the calibration of other T / R components.

Method used

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  • Internal calibration method for phased-array antenna transmit/receive (T/R) components
  • Internal calibration method for phased-array antenna transmit/receive (T/R) components
  • Internal calibration method for phased-array antenna transmit/receive (T/R) components

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Embodiment 1

[0079] The process of selecting codes using the method of the present invention is given by taking the transmission calibration of the T / R component as an example.

[0080] Assume that the radar system sets the amplifier gain of each T / R component of the phased array antenna to a constant value g s , the phase shifter is a 3-digit digital phase shifter, and the phase shift is set to -135°.

[0081] The phase shifter is composed of three phase delay devices of 45°, 90° and 180°. The phase shift from 0° to 360° can be realized through the on-off of these three phase delay devices, and the step accuracy is 45°. In order to provide -135° phase shift or 360°-135°=225° phase shift, it is necessary to turn on the 180° and 45° phase delay devices and turn off the 90° phase delay devices. With the encoding method of the present invention, if the encoding is 1, the phase shifter does not need to introduce additional phase shift; if the encoding is -1, the 180° phase delay device needs ...

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Abstract

The invention discloses an internal calibration method for phase-array antenna transmit / receive (T / R) components, which relates to a radar phased-array antenna technology and is used for performing operation such as phase encoding / decoding and the like on a T / R component signal according to a selected code sequence. By the method, gain and phase shift information of any T / R component can be extracted from composite signals of all the T / R components under the condition that all the T / R components are normally operated, so that the performance of a single T / R component can be monitored.

Description

technical field [0001] The invention relates to the technical field of radar phased array antennas, and relates to a method for monitoring the performance of a phased array antenna T / R component. Background technique [0002] The core component of the phased array antenna is the transceiver component (T / R component). The pattern of the phased array antenna is the result of the synthesis of the amplitude and phase characteristics of all T / R components. The performance of each T / R component will affect the direction of the synthesis. The graph has an impact. The phased array antenna controls the beam scanning by controlling the phase of each T / R component phase shifter, and realizes the beam of a specific pattern by controlling the amplifier of each T / R component. In actual work, factors such as environment, temperature changes, and device aging will cause a certain deviation between the amplitude and phase characteristics of the T / R component and the set value. Therefore, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00G01R29/10
Inventor 王朔禹卫东祁海明
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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