Method and device for detecting broadband microwave/infrared signals by beam splitting

Abstract

The invention relates to a method and a device for detecting broadband microwave / infrared signals by beam splitting, belonging to the technical field of beam splitting detection and physical simulation of microwave / infrared bimodule signals. The method comprises the following steps of: reflecting microwave signals and transmitting infrared signals by utilizing a metal grid beam splitter to realize the beam splitting of microwave and infrared bimodule coupling signals, wherein the reflected microwave signals enter a microwave receiver for detection, and simultaneously the transmitted infrared signals enter an infrared detector for detection, thereby the beam-splitting detection of the microwave and infrared bimodule coupling signals is realized. The device comprises a metal grid beam splitter, an infrared detector and a microwave receiver, wherein the metal grid beam splitter comprises an infrared substrate, a metal chromium or titanium bonding layer and a metal grid film, the period of the metal grid film in a vertical polarization direction is greater than the period in a parallel polarization direction, and the periods in the vertical polarization direction and the parallel polarization direction are both 1 / 2 less than the smallest wavelength of microwave. The invention can be applied to the technical field of the beam splitting detection and the physical simulation of the microwave / infrared bimodule signals.

Description

technical field [0001] The invention belongs to the technical field of microwave / infrared dual-mode signal beam splitting detection and hardware-in-the-loop simulation, and relates to a broadband microwave / infrared signal beam splitting detection method and device. Background technique [0002] Multi-band signal detection is a hot research topic in information processing, target image processing and recognition, etc., and it plays an important role and significance in military and civilian fields. Microwave / infrared signal detection is a kind of multi-band detection, and it is one of the key technologies to realize microwave / infrared dual-mode signal detection and hardware-in-the-loop simulation. In the microwave / infrared dual-mode composite mode, microwave has the advantages of long detection distance, wide operating frequency band, and large angle, while infrared imaging has the advantages of accurate target recognition, high precision, and all-weather work. Therefore, mic...

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Problems solved by technology

[0004] The principle of the existing infrared reflective film microwave / infrared beam splitter is to use the method of transmitting microwave and reflecting infrared to realize the beam splitting of microwave / infrared dual-mode signals. It has strict dependence, and the operating bandwidth of microwave / infrared signals is relatively narrow, so they all have certain limitations, so it is difficult to realize beam splitting detection of broadband microwave / infrared dual-mode signals

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