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Secondary radar channel calibration method

A technology of secondary radar and calibration method, used in radio wave measurement systems, instruments, etc., to achieve the effect of improving accuracy and stability

Inactive Publication Date: 2018-10-02
SICHUAN JIUZHOU ELECTRIC GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides a secondary radar channel calibration method, which solves the shortcomings of the existing calibration methods, and can calibrate the channel in real time under different temperature conditions under the condition of using unequal-length radio frequency lines, thereby improving the accuracy of the calibration result

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Embodiment Construction

[0032] The main purpose of the present invention is to propose a calibration scheme under the condition of different temperatures and unequal length radio frequency cables under the power calibration link mode, aiming at solving the problem that the calibration results are affected by the temperature and the external environment in the case of unequal length cables. problem of impact.

[0033] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, under the condition of not conflicting with each other, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0034] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present in...

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Abstract

The invention discloses a secondary radar channel calibration method. The method comprises the steps that external calibration and coupling calibration are performed on the radio frequency channels corresponding to the antenna oscillators before use of the antenna; and real-time calibration is performed on the channels corresponding to the unequal-length radio frequency cable antenna oscillators under different external temperature in use of the antenna so that the problem that the calibration result is influenced by the temperature and the external environment under the condition of the unequal-length cable can be solved.

Description

technical field [0001] The invention relates to the field of digital phased array secondary radar channel calibration, in particular to a secondary radar channel calibration method. Background technique [0002] The digital phased array radar antenna is composed of many antenna units, and each antenna unit corresponds to a separate receiving channel. In order to achieve low sidelobe, high gain and correct beam pointing, the receiving channel needs to be calibrated. The traditional calibration scheme Generally, the external calibration method is adopted, and the influence of temperature changes, unequal-length cables and the external environment on the calibration results are not considered. Temperature changes will cause inconsistent phase changes of unequal-length cables, and there are secondary radar signals in the external environment. , which seriously affects the calibration effect and obviously has disadvantages. Contents of the invention [0003] The invention prov...

Claims

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Application Information

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IPC IPC(8): G01S7/40
CPCG01S7/40
Inventor 王红林蒋有文任周唱刘涛
Owner SICHUAN JIUZHOU ELECTRIC GROUP
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