High performance frequency selective surface based on integrated waveguide multi-cavity cascade

A frequency selective surface and substrate integrated waveguide technology, applied in the microwave field, can solve the problems of limited use and general selection characteristics, and achieve the effects of stable performance, improved selection characteristics and low cost.

CN1937307BInactive Publication Date: 2010-04-07SOUTHEAST UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2010-04-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

Integrated wave-guide multicavity-cascaded frequency selection surface on base plate in high performance can be utilized as frequency range multiplexer to apply to antenna in multiple frequencies in communication system of satellite, radar etc. Pressing multiplayer microwave plates produces the frequency selection surface. The said surface includes following parts: outer up and low metal surfaces,middle metal surfaces in multi-layer, and intermediate media layer for filling gap between metal surfaces; etching out'#'shaped slot in large size on outer up and low metal surfaces, and etching out'#'shaped slot in small size on middle metal surfaces in multi-layer with their central positions being coincided each other; finally, a series of metalized through holes with even interval surroundingeach slot unit are set up on laminated base plate so as to form integrated wave-guide cavity on base plate of traditional metal cavity. The invention raises selectivity characteristic greatly.
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Description

technical field

[0001] The substrate integrated waveguide multi-cavity cascaded high-performance frequency selective surface of the present invention is a multi-frequency antenna used as a frequency band multiplexer for satellite, radar and other communication systems, used as a radar radome for stealth technology, and manufacturing millimeter waves / Infrared composite remote sensing technology multiplex antenna multiplexing side, as well as optical and quasi-optical system polarizer and beam splitting device. It belongs to the field of microwave technology. Background technique

[0002] Frequency selective surfaces (FSS) are widely used in engineering applications. FSS has good selectivity for the transmission and reflection of electromagnetic waves. It has all-pass characteristics for electromagnetic waves in its passband, and total reflection characteristics for electromagnetic waves in its stopband. It has a spatial filtering function. In the microwave field, FSS can b...

Examples

Embodiment Construction

[0020] Multi-cavity cascaded high-performance frequency-selective surfaces are fabricated using multi-layer microwave sheets laminated with a printed circuit board process. Its upper and lower surfaces and the middle layer evenly distribute the metal surface, and the metal layers are filled with medium. On the metal surface of the upper and lower outer layers, there are periodic "#"-shaped gap units with the same position, size and period length. The middle multi-layer metal surface is engraved with the same size and the same center position as the gap period of the upper and lower metal surfaces. Coincident periodic "#"-shaped gap units. On the laminated substrate, a series of metallized through-holes are arranged around each "#"-shaped slot unit at uniform intervals to form a substrate-integrated waveguide cavity equivalent to a traditional metal cavity cascaded up and down. . The "#" shaped gap etched on the upper and lower metal surfaces is a two-dimensional completely s...