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Electromagnetic antenna collimator

  • US 5,166,698 A
  • Filed: 04/06/1990
  • Issued: 11/24/1992
  • Est. Priority Date: 01/11/1988
  • Status: Expired due to Fees
First Claim
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1. A horn antenna comprising:

  • a) an antenna body having a plurality of regions coaxially aligned along a longitudinal body axis and including a first region having a forward aperture which tapers inward to a cylindrical region and from an inner end of which cylindrical region a second region tapers inward to an aft aperture; and

    b) dielectric means for focusing electromagnetic radiation to the longitudinal body axis and including (1) a first section mounted in the first region and a second section mounted aft of the first region wherein a dielectric constant of the first section is greater than a dielectric constant of the second section, and (2) dielectric interface means for interfacing with at least one of said first and second sections having a third dielectric constant between the first and second dielectric constants and a thickness which progressively increases with increasing radial distance from the longitudinal body axis.

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