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Electric monomicrostrip dipole antennas

  • US 4,083,046 A
  • Filed: 11/10/1976
  • Issued: 04/04/1978
  • Est. Priority Date: 11/10/1976
  • Status: Expired due to Term
First Claim
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1. A notched fed electric monomicrostrip dipole antenna structure comprising:

  • a. a dielectric substrate;

    b. a thin rectangular radiating element disposed on one side of said dielectric substrate;

    c. a thin non-radiating ground plane conductor disposed on the other side of said dielectric substrate directly opposite to said radiating element;

    d. said ground plane being identical in length to the length of said radiating element;

    said ground plane and said radiating element being aligned lengthwise;

    e. said ground plane extending in width on each side beyond the width of said radiating element to cause a mismatch such that the ground plane will not be excited;

    f. said radiating element operable to be excited to radiate about both the element and the ground plane side of the antenna in a near isotropic manner;

    the fields on both sides of the antenna being in phase;

    g. the length of said radiating element determining the resonant frequency of the antenna;

    h. said radiating element having a feed point located along the centerline of the length thereof;

    i. said radiating element having a notch extending into the element along the centerline of the length from one end thereof to said feed point;

    j. the antenna input impedance being variable to match most practical impedances as said feed point is moved along the element centerline without affecting the radiation pattern;

    k. the antenna bandwidth being variable with the width of said radiating element and the spacing between the radiating element and said ground plane, the width of said notch being a factor as to the effective width of said radiating element, said spacing between the radiating element and the ground plane having somewhat greater effect on the bandwidth than the width of said radiating element.

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