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Wide band antenna

  • US 4,803,494 A
  • Filed: 01/20/1988
  • Issued: 02/07/1989
  • Est. Priority Date: 03/14/1987
  • Status: Expired due to Term
First Claim
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1. A cavity backed crossed slot antenna wherein the cavity depth is less than one eighth of the operating wavelength at the lowest frequency of operation, the major dimension of the cavity in the plane of the slots is less than one half of the wavelength at the lowest operating frequency, and the slots are excited by four capacitive coupled feed probes extending through the bottom wall of the cavity, the probes being located symmetrically with respect to the crossed slots and the ends of the probes being separated from the top wall by gaps to provide the capacitive coupling.

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