Title: Bi-pass band frequency selective surface
Application Number: 200610096793 Application Date: 2006.10.17
Publication Number: 1937308 Publication Date: 2007.03.28
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H01P1/207;H01P1/20
Applicant(s) Name: Dongnan Univ. Address:
Inventor(s) Name:
Attorney & Agent: yelian sheng
Abstract:
    Frequency selection surface with dual band pass can be utilized as frequency range multiplexer to apply to antenna in multiple frequencies in comm. system of satellite, radar etc. identical periodic outer square annular slot units and periodic inner square annular slot units are etched on up and low metal surfaces of base plate so as to form periodic dual square annular slot array in two layers. A series of metalized through holes with even interval surrounding each doublelayer square annular periodic slot unit are set up on laminated base plate so as to form integrated wave-guide cavity on base plate equivalent to traditional metal cavity. Comparing with frequency selection surface in dual frequency composed of periodic patches or slots in two different sizes, the new structure introduces cavity resonance mode, realizes unilateral drooping characteristic in dual frequency so as to raise selectivity characteristic greatly, and provides good stability for angle and polarizability.
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