Conical beam control of quadrifilar helical antennas

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Conical beam control of quadrifilar helical antennas

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Published

The conical beam control of quadrifilar helical antennas with a fixed helical arm length is investigated. By adjusting a portion of the antenna height to vary the pitch angle, the elevation angle of the beam direction can be controlled with an almost constant gain. It is found that the elevation angle of the beam direction varies in proportion to the pitch angle.

Inspec keywords: helical antennas; antenna radiation patterns; microwave antennas; antenna theory

Other keywords: fixed helical arm length; antenna height adjustment; constant gain; conical beam control; quadrifilar helical antennas; pitch angle; elevation angle; beam direction

Subjects: Antenna theory; Single antennas

References

    1. 1)
      • Morishita, H., Takahashi, S., Kamei, T.: `Conical radiation pattern characteristics of a quadrifilar helical antenna', Proc. IEEE AP-S Int. Symp., July 1996, 3, p. 1954–1957.
    2. 2)
      • A.W. Rudge , K. Milne , A.D. Olver , P. Knight . (1986) The antenna handbook.
    3. 3)
      • C.C. Kilgus . Shaped-conical radiation pattern performance of the backfire quadrifilar helix. IEEE Trans. , 392 - 397
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