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Electromagnetic detection system

  • US 5,008,660 A
  • Filed: 03/03/1989
  • Issued: 04/16/1991
  • Est. Priority Date: 03/04/1988
  • Status: Expired due to Term
First Claim
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1. An electromagnetic detection system comprising a transmitter-receiver apparatus and at least one antenna element, said transmitter-receiver apparatus being coupled to said at least one antenna element to form an electromagnetic interrogation field in an interrogation zone, structural confining means for defining the range and area of said interrogation zone and for physically confining mobile entities to be interrogated in said interrogation zone, and a plurality of responders attached to each of said mobile entities and capable of generating a detectable signal under the influence of said interrogation field, said at least one antenna element being formed as an integral part of said structural confining means, said structural confining means comprising an automatic feeding station for animals comprising a food dispenser, two side railings, and two bows for reinforcing said side railings and extending over said railings and said interrogation zone, said at least one antenna element being integrally formed with at least one of said bows.

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