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Horn antenna

  • US 6,859,187 B2
  • Filed: 03/17/2003
  • Issued: 02/22/2005
  • Est. Priority Date: 03/18/2002
  • Status: Expired due to Term
First Claim
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1. A horn antenna intended for transmission and reception of microwaves when gauging a level of a surface of a medium stored in a tank by means of a microwave unit arranged at the roof of the tank, where the antenna comprises:

  • a first conductive housing (7) having a wave guide port (8), which is connectable to a wave guide, a first aperture (10), which is separated from the wave guide port (8) and a first divergent section between the wave guide port (8) and the first aperture (10);

    a dielectric body (11) is, for maintaining a mechanically pressure resistant antenna design, arranged inside and essentially filling the first conductive housing (7), which body (11) displays a free end (12) in the area of the first aperture (10), characterized in thataround the first aperture (10) is arranged a locking device (13), the locking device (13) is arranged to fix the dielectric body (11) in the first housing (7), and in the area of the locking device (13) is, for efficiently separating atmospheres inside and outside the tank, arranged at least one flexible pressure sealing element (16) between the dielectric body (11) and the first housing (7).

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