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Antenna apparatus

  • US 7,423,594 B2
  • Filed: 04/13/2006
  • Issued: 09/09/2008
  • Est. Priority Date: 05/31/2005
  • Status: Expired due to Fees
First Claim
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1. The antenna apparatus comprising:

  • a dielectric substrate;

    an antenna element pattern formed on the dielectric substrate;

    a feed line connected to the antenna element pattern; and

    a filter inserted into the feed line whereinthe filter is constituted by a distributed constant circuit formed by an electrically conductive pattern of a ring filter having a stub arranged at a middle part of the feed line.

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