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Antenna circuit of the negative impedance type

  • US 4,442,434 A
  • Filed: 03/13/1981
  • Issued: 04/10/1984
  • Est. Priority Date: 03/13/1980
  • Status: Expired due to Fees
First Claim
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1. An aerial circuit comprising a main antenna and a negative impedance means for producing a broad effective frequency range of the aerial circuit the negative impedance means comprising an amplifier and a frequency dependent impedance imitating an impedance of the main antenna and seeking to eliminate the same through the amplifier, characterized in that the frequency dependent impedance is constituted by an auxiliary antenna of a similar type as the main antenna.

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