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Transponder

  • US 9,177,244 B2
  • Filed: 08/25/2014
  • Issued: 11/03/2015
  • Est. Priority Date: 05/05/2011
  • Status: Active Grant
First Claim
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1. A transponder comprising:

  • a first antenna, coupled to receive an interrogation signal, the first antenna generates a first electrical signal from the interrogation signal;

    a second antenna, coupled to receive the interrogation signal, the second antenna generates a second electrical signal from the interrogation signal, wherein a first axis of the first antenna and a second axis of the second antenna are aligned differently; and

    a summing element, coupled to receive at least a portion of the first and second electrical signals, the summing element generates a pulsating sum signal from the at least a portion of the first and second electrical signals, the frequency of the pulsating sum signal being different from the frequency of the interrogation signal.

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