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Sense finding device for solid base line broad band microwave radiation source and sense finding method thereof

A microwave radiation and direction-finding device technology, applied in the field of passive radar detection and detection technology, can solve the problems of single placement form, unable to achieve high-end non-ambiguous direction-finding of radiation source signals, avoid position conflicts, and easily effect achieved

Inactive Publication Date: 2008-01-23
HARBIN ENG UNIV
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AI Technical Summary

Problems solved by technology

However, the existing direction-finding methods such as long and short baselines require small antenna element spacing to ensure unambiguous direction-finding at the high frequency of the radiation source signal. Due to the limitation of the physical size of the antenna elements themselves, it is impossible to achieve Placement with a small spacing, and then it is impossible to realize the high-frequency unambiguous direction finding of the radiation source signal; and the direction finding methods such as long and short baselines need to form an L-shaped antenna array when realizing two-dimensional direction finding, and its placement form is single, which may Conflicts with antenna elements or sensor positions of other guidance modes in the compound guidance mode

Method used

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  • Sense finding device for solid base line broad band microwave radiation source and sense finding method thereof
  • Sense finding device for solid base line broad band microwave radiation source and sense finding method thereof

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Embodiment Construction

[0015] Below in conjunction with accompanying drawing example the present invention is described in further detail:

[0016] Combined with Figure 1, antenna element 0 is placed in the center of the antenna disk, and antenna elements 1 to 5 are placed in a uniform circular array along the antenna disk. r is the distance from the center of the antenna array element to the center of the antenna disk, and r can be taken as microwave Several to ten times the shortest wavelength of the radiation source. In order to ensure the accuracy of direction finding, the phase difference of the microwave radiation source between the antenna elements with large spacing is usually selected to solve the azimuth and elevation angle of the microwave radiation source, and this will inevitably introduce multi-valued ambiguity in the solution, which can be Arbitrarily select three antenna elements among the five antenna elements to form the first group of antenna arrays, select three antenna elements ...

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Abstract

The invention provides a stereo baseline wide-band direction-finding device and method for microwave radiation source comprising 6 antenna array elements, a hi-frequency assembly, an instantaneous frequency-measuring receiver, a frequency mixer, a mid-frequency amplifier, a local oscillation source, a digital receiver and a signal processor. The info on phase of the microwave radiation source got through the antenna array elements is used to calculate the phase difference between antenna array elements; the position angle and pitch angle of the microwave radiation source are calculated based on the relationship between the phase difference of the microwave radiation source and the position angle / pitch angle of the microwave radiation source; the 2D direction-finding fuzzy is worked out by using the results of the antenna array elements. In this way, the concurrent no-fuzzy hi-accuracy direction finding of the position angle and pitch angle of the microwave radiation source are realized in a wideband range; and the flexible arrangement form of the antenna array elements allows reasonable arrangement of the location of the antenna array elements so as to meet the requirement for application in cases with limited volume of antenna tray or with limited position for the antenna array elements.

Description

technical field [0001] The invention relates to a detection technology, more precisely, it belongs to the technical field of passive radar detection. Background technique [0002] The operating frequency range of modern radar systems is very wide, which puts forward higher requirements for radar detection technology, so the anti-radiation seeker must have a wide frequency coverage, and with the emergence of composite guidance methods, the seeker antenna dish The layout of the upper antenna array elements also puts forward more flexible requirements. However, the existing direction-finding methods such as long and short baselines require small antenna element spacing to ensure unambiguous direction-finding at the high frequency of the radiation source signal. Due to the limitation of the physical size of the antenna elements themselves, it is impossible to achieve Placement with a small spacing, and then it is impossible to realize the high-frequency unambiguous direction fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/46
Inventor 司伟建初萍司锡才曲志昱
Owner HARBIN ENG UNIV
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