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Communication system using transmit/receive slot antennas for near field electromagnetic coupling of data therebetween

  • US 8,121,544 B2
  • Filed: 04/21/2009
  • Issued: 02/21/2012
  • Est. Priority Date: 04/30/2008
  • Status: Expired due to Fees
First Claim
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1. An antenna apparatus for use in a transmitter or a receiver in a communication system, the antenna apparatus comprising:

  • a dielectric substrate having a conductor layer on one surface thereof; and

    a slot antenna includingan antenna electrode formed from the conductor layer on the one surface,a grounded conductive surface formed from the conductor layer on the one surface to surround the antenna electrode, anda slot transmission line formed as a gap between the antenna electrode and the grounded conductive surface,the slot antenna further including two feed points of the slot transmission line, one of the two feed points coupling the slot transmission line to ground via a resistor.

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