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Frequency selecting surface based on substrate integrated waveguide technology

A substrate-integrated waveguide and frequency-selective surface technology, applied in the microwave field, can solve the problems of limited application and unstable performance, and achieve the effects of less structural parameters, improved performance, and small insertion loss

Inactive Publication Date: 2006-08-30
SOUTHEAST UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

Especially for incident waves with different incident angles and different polarization states, the performance is unstable, which limits its practical application

Method used

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  • Frequency selecting surface based on substrate integrated waveguide technology
  • Frequency selecting surface based on substrate integrated waveguide technology
  • Frequency selecting surface based on substrate integrated waveguide technology

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Experimental program
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Embodiment Construction

[0017] The manufacturing process of the present invention is as follows: firstly, grooves are cut on the double-sided metal surface of the dielectric substrate to realize a frequency selective surface of an ordinary dielectric-filled double-layer periodic slot array, and then each periodic slot unit is surrounded on the substrate. A series of metalized through holes are punched periodically to form a substrate integrated waveguide cavity equivalent to a traditional metal cavity. Since the required cavity is realized by punching a series of metal through hole arrays on the dielectric substrate, attention should be paid to selecting the appropriate aperture and hole spacing to avoid energy leakage between the cavities. This frequency selective surface combines the transmission characteristics and field distribution of the traditional periodic structure and the ordinary cavity structure. Since the thickness of the substrate is much smaller than the wide side of the cavity, it has lit...

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Abstract

The invention is a frequency selective surface based on integrated waveguide technique, able to act as a frequency band multiplexer applied to multifrequency antennas of satellite, radar and other communication systems, act as radar antenna cover used for stealth technique, and be applied to manufacture multiplexed auxiliary surface of a multiplexed antenna in millimeter wave-infrared compound remote sensing technique and polarizers and beam separators in optical and quasi-optic systems. And it is carved with many corresponding double-layer periodic clearance channel units on double metallic sides of a dielectric substrate to compose an array of double-layer clearance channels, and periodically and at intervals arranges a series of metallized through holes around each double-layer periodic clearance channel unit on the substrate to form a substrate integrated waveguide cavity equivalent to a traditional metal cavity. As compared with ordinary pasted or slotted frequency selective surface, it has better pass band and better angle of incident wave and stability of polarity.

Description

Technical field [0001] The novel frequency selective surface based on the substrate integrated waveguide technology of the present invention can be used as a frequency band multiplexer for multi-frequency antennas of communication systems such as satellites and radars, and used as a radome for stealth technology to manufacture millimeter wave / infrared composite remote sensing technology The multiplexing sub-plane of the medium multiplexing antenna, and the polarizer and beam splitting device of the optical and quasi-optical system. The invention 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 exhibits all-pass characteristics for electromagnetic waves in its passband, while the electromagnetic waves in its stopband show total reflection characteristics, that is, it has a spatial filter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/20
Inventor 罗国清洪伟
Owner SOUTHEAST UNIV
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