Title: Three-D resonant cavity capable of reducing cut-off frequency
Application Number: 200610030490 Application Date: 2006.08.28
Publication Number: 1913220 Publication Date: 2007.02.14
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H01P7/06
Applicant(s) Name: Tongji Univ. Address:
Inventor(s) Name: Li Hongqiang;Wei Zeyong
Attorney & Agent: chen longmei
Abstract:
    This invention relates to a 3-D resonance cavity reducing the cut-off frequency including a metal wall closing to a cavity and medium in the cavity characterizing that: the surface of the metal wall in the cavity includes one or 2-3 artificial magnetic surfaces composed of a copper-spreading layer, a dielectric layer and a metal copper layer, in which, the copper-spreading layer is composed of a period unit structure kind meeting the selected working wave length and period structure geometrical parameter, the periodic unit structure kind can be types of square mushroom, UC-PBG, parting of H, parting of Hilbert or Spiral plane screws, the metal wall is replaced by a metal copper layer of artificial magnetic surface and the cut-off frequency is not limited by the geometrical diameter of the cavity.
Time: 7