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Phased array amplitude-phase error near-field calibration method based on one-dimensional rotation

A technology of amplitude and phase error and calibration method, applied in the field of radar, can solve the problem of low versatility

Active Publication Date: 2016-02-24
SHANGHAI RADIO EQUIP RES INST
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Problems solved by technology

However, the planar near-field calibration method requires a dedicated antenna near-field measurement system and test site, and its versatility is not high.

Method used

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  • Phased array amplitude-phase error near-field calibration method based on one-dimensional rotation
  • Phased array amplitude-phase error near-field calibration method based on one-dimensional rotation
  • Phased array amplitude-phase error near-field calibration method based on one-dimensional rotation

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Embodiment Construction

[0082] The following combination Figure 1 ~ Figure 3 , a preferred embodiment of the present invention is described in detail.

[0083] Such as image 3 As shown, the one-dimensional rotation-based phased array amplitude and phase error near-field calibration method provided by the present invention includes the following steps:

[0084] S1. Build a test system for the phased array amplitude and phase error of the phased array antenna, fix the phased array antenna at a predetermined initial rotation angle, and initially measure the calibration source and the reference array elements of the phased array antenna in the cylindrical coordinate system the initial position of

[0085] S2. The test system measures the receiving channel amplitude information and phase measurement information of the phased array antenna;

[0086] S3. The test system measures the transmit channel amplitude information and phase measurement information of the phased array antenna;

[0087] S4. Judgi...

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Abstract

The invention relates to a phased array amplitude-phase error near-field calibration method based on one-dimensional rotation, and the method comprises the steps: S1, building a phased array amplitude-phase error testing system, enabling a phased array antenna to be fixed at an initial rotating angle, and measuring the initial position of a calibration source and the initial position of a reference array element; S2, measuring the receiving channel amplitude information and phase measurement information of the phased array antenna; S3, measuring the transmitting channel amplitude information and phase measurement information of the phased array antenna; S4, judging whether the measurement of all preset rotating angles is carried out or not: executing step S5 if the measurement of all preset rotating angles is carried out, or else enabling the phased array antenna to be rotated to another preset rotating angle, and executing step S2 and step 3; S5, calculating the calibration value of a phased array amplitude-phase error; S6, calculating the initial position of the calibration resource and the initial position of the reference array element through an optimization principle; S7, calculating the calibration value of the phased array amplitude-phase error. The method just needs to meet the far-field condition of a single antenna unit in the phased array antenna, is simple in calibration, is high in operability, is higher in measurement precision, and is easy in engineering realization.

Description

technical field [0001] The invention relates to a near-field calibration method for phased array amplitude and phase errors based on one-dimensional rotation, which belongs to the field of radar. Background technique [0002] Phased array amplitude and phase errors have many influences on the performance of phased array antennas. In order to reduce the influence, it is necessary to calibrate the amplitude and phase errors of the phased array, and scholars have done a lot of effective work on this and obtained rich research results. The calibration methods of the amplitude and phase errors of phased arrays are mainly divided into internal calibration method and external calibration method. The external calibration method is divided into two types: the far-field calibration method and the planar near-field calibration method. [0003] The internal calibration method is to use additional equipment in the phased array antenna system, such as setting the switch matrix, travelin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/10G01S7/40
CPCG01R29/10G01S7/40G01S7/4004
Inventor 刘斌吉峰赵学州邹波雷威
Owner SHANGHAI RADIO EQUIP RES INST
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