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Accurate sense finding device for P/L waveband radiation source and sense finding method thereof

A technology of direction finding device and radiation source, which is applied in the direction of measuring device, directional device for determining direction, radio wave measuring system, etc., can solve the problem of low accuracy of angle measurement, and achieve the effect of stable and accurate tracking of targets

Inactive Publication Date: 2008-01-23
HARBIN ENG UNIV
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Problems solved by technology

[0004] It can be seen that the ratio of λ / L is relatively large, and Δφ cannot be zero, and it is best to only achieve about 5°, so Δθ is relatively large, that is, the measured Angular accuracy is relatively low

Method used

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  • Accurate sense finding device for P/L waveband radiation source and sense finding method thereof
  • Accurate sense finding device for P/L waveband radiation source and sense finding method thereof
  • Accurate sense finding device for P/L waveband radiation source and sense finding method thereof

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing and specific work process, the present invention will be further described:

[0024] Referring to FIG. 1 , six antennas 1 to 6 are arranged in a circular antenna array, one of which is located at the center of the circle and 30 mm higher than the other antennas, and the other five are equally spaced along the circumference.

[0025] Combining Figure 2 and Figure 3, the six channels of signals received by the antenna array composed of six antennas 1 to 6 are respectively input to the six channels of microwave front-ends, and the six bi-state attenuators of the six channels of microwave front-ends 7 to 12 are used as input stages, passing through switches 13 to 18 6-way switches, 6-way low-noise high-frequency amplifiers HFA19-24, and then through 6-way splitters 25-30, wide-wave gate strobe switches 31-36, and filters 37-42, the 6-way signals are input to 6 Road mixer, the mixer mixes the 6 road input signals with the 6 road...

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Abstract

The invention relates to an accurate direction-finding device and way for P, L wave-band radiation source, which comprises an antenna array comprising 6 array elements and 6 corresponding receivers, a signal processor and a calibrating signal source. Microwave emitted from an object in the space will be received by the 6 antennas, and sent into 6 microwave receivers behind the antennas, then sent into a digital receiver through the frequency converting and amplification by a hi- / middle-frequency and a mid-frequency receiver; the digital receiver will extract the phase values of the 6 signals through a hi-speed A / D converter and send them into the signal processor, which works out the incident angle Theta of the signals by using a space spectrum evaluating arithmetic MUSIC. The invention realizes hi-accuracy direction finding for P, L wave-band radiation source.

Description

technical field [0001] The invention relates to an array signal processing high-precision direction finding technology in the communication technology. Background technique [0002] At present, most anti-radiation missile seekers at home and abroad adopt the phase interferometer direction finding method with relatively high direction finding accuracy. This direction finding method can obtain relatively high accuracy above 2 GHz, and generally can reach more than 1° / σ. However, when the radiation frequency of the radiation source is in the P and L bands, that is, 0.2-2 GHz, due to the limitation of the volume of the missile, the area where the antenna is installed on the seeker cannot be too large, so the direction-finding error formula of the phase interferometer is: [0003] Δθ = Δφλ 2 π L cos θ [0004] It can be seen that the rat...

Claims

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Application Information

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IPC IPC(8): G01S3/46
Inventor 司锡才司伟建张忠民谢纪岭
Owner HARBIN ENG UNIV
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