Circular array antenna real-time calibration method

A calibration method and antenna technology, applied to radio wave measurement systems, instruments, etc.

Inactive Publication Date: 2020-08-28
成都微联云智科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, phased array radar transceiver channel amplitude phase consistency error calibration is an unavoidable problem for every phased array radar

Method used

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  • Circular array antenna real-time calibration method
  • Circular array antenna real-time calibration method
  • Circular array antenna real-time calibration method

Examples

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Embodiment Construction

[0020] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described below are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0021] 1. Echo signal model

[0022] Using the given calibration reference signal, each signal to be calibrated is compared, the corresponding amplitude and phase data are given, and the calibration of the channel is realized through multiple iterations. Corresponding to the (m, n)th T / R component, the calibration signal coupled with the calibration coupling line is:

[0023]

[0024] Among them, in the formula: α is the signal amplitude; δ nm , is the unit-level independent amplitude and phase error; w nm and Φ nm is the weighting coefficient of amplitude and phase; C nm is the calibration coupling ratio; u s , v s is the inter-unit phase step...

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Abstract

The invention discloses a circular array antenna real-time calibration method. The circular array antenna real-time calibration method comprises transmission calibration and receiption calibration ofa circular array antenna.

Description

technical field [0001] The invention relates to the technical field of radar antennas, in particular to a real-time calibration method for circular array antennas. Background technique [0002] Phased array radar has a large number of RF transceiver channels, and each transceiver channel has analog devices such as amplifiers, filters, mixers, etc. The existence of channel inconsistency will affect the quality of the beam after Digital Beam Forming (DBF) , especially has a great influence on the beam pointing, main lobe width, side lobe level and beam shape, and then affects the overall performance of the radar. Channel calibration obtains the amplitude and phase inconsistency between channels through testing, and compensates the channels to obtain a better beam pattern. Therefore, the calibration of amplitude-phase consistency error of phased-array radar transceiver channel is an unavoidable problem for every phased-array radar. [0003] The phased array radar antenna is c...

Claims

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Application Information

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IPC IPC(8): G01S7/40
CPCG01S7/4008G01S7/4021Y02A90/10
Inventor 刘思远赵树龙覃波武晓坤蔺庆潘喆莫新钱郑舒文廖正伟
Owner 成都微联云智科技有限责任公司
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