Low common mode resonance multiband radiating array

  • US 9,698,486 B2
  • Filed: 05/28/2015
  • Issued: 07/04/2017
  • Est. Priority Date: 01/15/2015
  • Status: Active Grant
First Claim
Patent Images

1. A higher band radiating element for a multiband antenna having at least higher band elements and lower band elements, comprising:

  • a. first and second dipole arms, each dipole arm having a capacitive coupling area; and

    b. a feedboard having a balun and first and second matching circuits coupled to the balun, the first matching circuit being coupled to the first dipole arm and the second matching circuit being coupled to the second dipole arm, the first and second matching circuits each comprising in series;

    1. a stalk, coupled to the balun,2. a first capacitive element;

    3. an inductor; and

    4. a second capacitive element, the second capacitive element being coupled to a dipole arm;

    each matching circuit further comprising a common mode tuning circuit connecting the first capacitive element and the inductor to the stalk to move the common mode resonance of the matching circuits to a frequency below the lower band frequency.

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