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Wireless sensor device

  • US 7,965,180 B2
  • Filed: 09/25/2007
  • Issued: 06/21/2011
  • Est. Priority Date: 09/28/2006
  • Status: Expired due to Fees
First Claim
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1. A wireless sensor device comprising:

  • a substrate provided with a circuit;

    an antenna circuit for transmission and reception of radio waves, the antenna circuit formed on the substrate;

    a battery for storing electrical energy obtained from the radio waves;

    a sensor circuit for acquiring information by using the electrical energy;

    a ferrite interposed between the substrate and the battery;

    an airtight package packing the antenna circuit, the battery, the sensor circuit and the ferrite; and

    a flexible printed board for electrically connecting the substrate and the battery,wherein the circuit includes a rectifier circuit, a demodulation circuit, a modulation circuit and a logic circuit, andwherein the battery is sandwiched by the flexible printed board.

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