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Resonator, filter, duplexer, and communication device

  • US 6,486,754 B1
  • Filed: 12/22/1999
  • Issued: 11/26/2002
  • Est. Priority Date: 12/22/1998
  • Status: Expired due to Fees
First Claim
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1. A resonator comprising:

  • a substrate; and

    a set of lines comprising a plurality of spiral lines;

    wherein inner and outer ends of the spiral lines are distributed substantially along an inner periphery and an outer periphery of the set of lines respectively, the inner and outer peripheries being centered around a specified point on the substrate, wherein the lines do not cross each other and wherein the width of at least one of the lines is substantially equal to or narrower than the skin depth of a conductor material of the line at a resonant frequency of the resonator.

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