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

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...

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

Images