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Dual frequency cavity backed slot antenna

  • US 5,461,393 A
  • Filed: 08/20/1993
  • Issued: 10/24/1995
  • Est. Priority Date: 08/20/1993
  • Status: Expired due to Term
First Claim
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1. A dual frequency cavity backed slot antenna comprising:

  • (a) a plurality of stacked layers including a layer having a substrate with a surface, said surface including thereon;

    (i) a continuous slot;

    (ii) first electrically conductive metallization disposed internal of said slot and extending to said slot;

    (iii) second electrically conductive metallization disposed external to said slot and extending to said slot; and

    (iv) at least one pair of frequency adjusting means, one of said pair of frequency adjusting means formed by a portion of said first metallization and the other of said pair of frequency adjusting means formed by a portion of said second metallization, said frequency adjusting means comprising;

    (v) a pair of coaxial frequency adjusting tabs of electrically conductive metallization symmetrical about an axis, the tab formed by said first metallization extending outwardly toward said second metallization and the tab formed by said second metallization extending inwardly toward said first metallization.

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