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Low/high frequency shared leakage antenna, base station apparatus and close-range detection system using the antenna

  • US 8,811,278 B2
  • Filed: 02/02/2011
  • Issued: 08/19/2014
  • Est. Priority Date: 02/03/2010
  • Status: Expired due to Fees
First Claim
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1. A low/high frequency shared leakage antenna comprising:

  • a high-frequency leakage coaxial cable having an inner conductor and an outer conductor;

    a termination circuit that terminates the inner conductor and the outer conductor in impedance at one end of the high-frequency leakage coaxial cable; and

    a loop structure of a conductor line that is arranged near the high-frequency leakage coaxial cable while being in parallel therewith to perform a communication of low-frequency signals,wherein a communication of high-frequency signals higher in frequency than the low-frequency signals is performed through the high-frequency leakage coaxial cable, andwherein the sensitivity of effective sensitivity areas for the low-frequency signals is reduced by the loop structure to allow electromagnetic waves of the low-frequency signals to locally exist around the loop structure.

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