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Spaceborne dual-channel angle tracking calibration system and method

A technology of calibration system and calibration method, which is applied in radio wave measurement system, radio wave reflection/re-radiation, utilization of re-radiation, etc., can solve the problems of channel phase inconsistency, no amplitude inconsistency, real-time calibration, etc., to improve The effect of measurement accuracy, high real-time performance, and fast calculation method

Active Publication Date: 2010-12-22
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology

[0011] The calibration method described above has two disadvantages: a. It only calibrates the phase inconsistency of the channel, and there is no calibration for amplitude inconsistency; b. The device is calibrated before use, and it cannot be calibrated in real time during use

Method used

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  • Spaceborne dual-channel angle tracking calibration system and method
  • Spaceborne dual-channel angle tracking calibration system and method
  • Spaceborne dual-channel angle tracking calibration system and method

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Embodiment Construction

[0042] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0043] 1. Systematic review

[0044] Such as figure 1 Shown is a system block diagram in the present invention, the system in the present invention includes: antenna device, duplexer, synthesis network device, sum receiver, differential receiver, transmitter, digital signal processor and calibration device, The calibration device includes a radio frequency switch, a magic T and two calibration couplers. The connection relationship of each component can be seen from the figure. Wherein, the sum receiver forms a sum receive channel; the differential receiver forms a differential receive channel.

[0045] In each cycle, the system can firstly measure the errors of the two channels in the current cycle, and obtain amplitude compensation value and phase compensation value respectively. Then detect the target angle, obtain the angle error signal and then u...

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Abstract

The invention discloses a spaceborne dual-channel angle tracking calibration system and a method. The system comprises an antenna device, a polarization duplexer, a synthesis network, a sum-path receiver, a difference-path receiver, a transmitter, a digital signal processor and a calibration device. Due to the calibration device, the system can realize real-time compensation for an angle error signal within each period, thereby improving the system precision; and meanwhile, the calibration device of the invention has the advantages of simplicity and easy implementation.

Description

technical field [0001] The invention relates to a channel phase calibration technology of a satellite-borne dual-channel angle tracking system radar, and is a new real-time calibration method for amplitude and phase inconsistencies. Background technique [0002] The receiving channel of the radar is an active device, which contains low-noise amplifiers, filters, attenuators, etc., and the local oscillator signal source of the receiving channel is provided by the frequency synthesizer. Due to the existence of these devices, the amplitude and phase of the two receiving channels Not only is the consistency poor, but it varies with temperature. Therefore, for the spaceborne dual-channel angle tracking system, the amplitude and phase consistency of the two receiving channels must be calibrated in real time. [0003] Monopulse angle measurement technology belongs to a kind of simultaneous lobe angle measurement technology. In a plane, two identical beams partially overlap, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40G01S13/68
Inventor 孙文锋尚社宋大伟李栋范晓彦
Owner XIAN INSTITUE OF SPACE RADIO TECH
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