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Passive coherent location radar direction finding system based on Adcock antenna and direction finding method thereof

A radar direction finding and external radiation source technology, applied in the radar field, can solve the problems of complex realization and inability to achieve 360° coverage of the whole airspace.

Inactive Publication Date: 2010-08-11
XIDIAN UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the system can achieve a large coverage area, it is complicated to implement due to the need to scan at every angle.
At the same time, since each array element has a certain main lobe width, it cannot achieve 360° coverage of the entire airspace

Method used

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  • Passive coherent location radar direction finding system based on Adcock antenna and direction finding method thereof
  • Passive coherent location radar direction finding system based on Adcock antenna and direction finding method thereof
  • Passive coherent location radar direction finding system based on Adcock antenna and direction finding method thereof

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Embodiment Construction

[0059] The content and effects of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0060] refer to figure 1 , The radar system of the present invention is mainly composed of a receiving antenna, a receiver, a signal processor, a constant false alarm detection and track correlation module, and an angle measurement module. in:

[0061] The receiving antenna is divided into two parts, called the reference antenna and the signal antenna. The reference antenna is a narrow-beam directional antenna. The main function of the reference antenna is to use the main lobe to point to the broadcast station transmitting station to obtain the direct wave signal of the FM broadcast station during the system operation. Such as figure 2 As shown, the signal antenna is a four-element circular array Adcock antenna. The radius of the circular array is 0.6m. Four array elements are evenly distributed on the circular array, and each array ele...

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Abstract

The invention discloses a passive coherent location radar direction finding system based on an Adcock antenna, mainly solving the problem that angles are precisely measured in an environment with strong direct waves and multi-path interferences. The system mainly comprises a signal branch route signal antenna, a receiver A, a signal processor, a constant false alarm rate (CFAR) and track association module and an angle measurement module. The signal antenna applies the Adcock antenna for receiving moving target echo, direct wave and multi-path. The received signal is filtered and amplified by the receiver A, and is transmitted to the signal processor; an analogue intermediate frequency signal is converted into a digital base-band signal via the signal processor, channel adjustment, clutter canceling and range-Doppler two-dimensional correlation are carried out, and the result is transmitted to the CFAR and track association module; the original track is detected by the CFAR and track association module or a target of a new track is formed by the CFAR and track association module, and the angle of the target is measured by the angle measurement module. The invention can realize precisely measurement of angles in an environment with strong direct waves and multi-path interferences.

Description

technical field [0001] The invention belongs to the field of radar technology, in particular to an Adcock antenna-based radar direction finding system for coherent positioning of external radiation sources. The system can realize weak target echo detection and accurate direction finding in the environment of strong direct arrival waves and multipath interference, and the coverage can reach a horizontal 360° azimuth angle. Background technique [0002] With the development of modern warfare technology, radar is facing threats from target stealth, anti-radiation missiles, low-altitude penetration and electronic jamming. Traditional single-base radar, because the transceiver is placed in the same place, has been difficult to meet the requirements of modern warfare "conceal itself, discover the enemy first, and attack the enemy first". Therefore, it is necessary to study a new radar system to adapt to the modern combat environment. Passive radar system has attracted extensive a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/62
Inventor 王俊王海涛阙俊才赵勇
Owner XIDIAN UNIV
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