Phase-controllable dual-channel direction finding device and method

A direction finding device and dual-channel technology, which are applied to direction finders using radio waves, radio wave direction/bias determination systems, etc., can solve problems such as the decline of direction finding performance, correct additional errors, and reduce the overall correction difficulty. , the effect of high direction finding accuracy

Pending Publication Date: 2021-04-30
SHAANXI FENGHUO ELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In different working environments, the phase consistency of the channel is affected and changes, and calibration is required. When using the phase interference method for direction finding processing, if the two antennas are regarded as ideal, the inconsistency of the channel phase will be directly leading to a severe drop in direction finding performance

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  • Phase-controllable dual-channel direction finding device and method
  • Phase-controllable dual-channel direction finding device and method

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Embodiment Construction

[0023] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0024] The specific implementations / examples described here are specific specific implementations of the present invention, and are used to illustrate the concept of the present invention. limit. In addition to the embodiments described here, those skilled in the art can also adopt other obvious technical solutions based on the claims of the application and the contents disclosed in the description, and these technical solutions include adopting any obvious changes made to the embodiments described here. The replacement and modified technical solutions are all within the protection scope of the present invention.

[0025] Please refer to Figure 1-2 As shown, the present invention provides a phase-controllable dual-channel direction finding device, comprising:

[0026] The first radio frequency control unit 1, the first frequency conversion...

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Abstract

The invention provides a phase-controllable double-channel direction finding device. The device comprises a first radio frequency control unit, a first variable-frequency amplification unit, a first variable gain amplifier, a first sampling unit, a digital control and data storage unit, a second radio frequency control unit, a second variable-frequency amplification unit, a second variable gain amplifier and a second sampling unit. According to the method for eliminating the channel phase error through the phase-controllable dual-channel direction finding device, the phase change between channels can be corrected in dual-channel direction finding, and extra errors brought to a direction finding system due to the difference of channel responses are eliminated. The invention also provides a phase-controllable dual-channel direction finding method. Compared with the prior art, the phase-controllable dual-channel direction finding device and the phase-controllable dual-channel direction finding method are high in direction finding accuracy.

Description

technical field [0001] The invention relates to the technical field of ultrashort wave direction finding, in particular to a phase-controllable dual-channel direction finding device and method. Background technique [0002] With the continuous development of electronic technology, airborne search and rescue systems are facing more and more difficulties in improving the accuracy of direction finding. At present, airborne search and rescue equipment uses airborne dual antennas and a pair of receivers with strict phase matching, and adopts the phase interferometer direction finding method to simultaneously receive and solve the signal of the rescue target, and the time difference between the signal and the two receiving antennas, and this The distance between the two antennas is used to obtain the phase difference of the signal of the same radiation source to obtain the angle of incidence and achieve relative positioning. [0003] Phase interferometer direction finding is a di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/14
CPCG01S3/14
Inventor 王斌
Owner SHAANXI FENGHUO ELECTRONICS
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