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Millimeter wave filters

  • US 8,106,810 B2
  • Filed: 11/03/2008
  • Issued: 01/31/2012
  • Est. Priority Date: 07/03/2008
  • Status: Active Grant
First Claim
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1. An electromagnetic radiation filter for filtering a difference frequency signal having a frequency Δ

  • f equaling a difference between a first scattering frequency f1 and a second scattering frequency f2, comprising;

    a dielectric substrate defining a plane; and

    a plurality of dipole antennas arranged in rows on the substrate, wherein each dipole is a one-half wavelength dipole at a frequency between the scattering frequencies f1 and f2, and wherein the dipoles in each row are spaced apart to form an end-fire array at the scattering frequencies such that electromagnetic radiation at the scattering frequencies perpendicularly incident to the substrate is scattered in the plane and wherein the difference frequency signal perpendicularly incident to the substrate passes though the substrate.

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