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Loop antenna circuit useful in subterranean tool

  • US 20040217763A1
  • Filed: 05/01/2003
  • Published: 11/04/2004
  • Est. Priority Date: 05/01/2003
  • Status: Active Grant
First Claim
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1. A loop antenna circuit for use in a borehole, comprising:

  • a loop antenna disposed to generate, in response to an electromagnetic wave, a pick-up signal on an output node thereof; and

    a tuning network coupled to the loop antenna, the tuning network disposed to provide simultaneous tuning at a plurality of interrogation frequencies.

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