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Miniature microstrip antenna

  • US 6,295,029 B1
  • Filed: 09/27/2000
  • Issued: 09/25/2001
  • Est. Priority Date: 09/27/2000
  • Status: Expired due to Term
First Claim
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1. A miniature microstrip antenna having a circuit board with a suitable length and a suitable width, said circuit board does not have any metallic portion in the back side thereof, a ¼

  • λ

    microstrip line is rolled on the surface of said circuit board in the shape of a rectangular spiral, the end of said rectangular spiral microstrip line is connected via a vertical section to another {fraction (1/20)}λ

    microstrip line which acts as an open-stub, a junction of said rectangular spiral microstrip line with said open-stub acts as a signal feeder point;

    a ground plane is provided near said signal feeder point but does not connect with said signal feeder point, said ground plane is punched to form a hole to get a desired harmonic oscillation frequency shifting.

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