Helical antenna having a parasitic element and method of using s

Details Helical antenna having a parasitic element and method of using s Helical antenna having a parasitic element and method of using s

1997-03-21

1998-05-19

Hajec, Donald T.

Communications: radio wave antennas

Antennas

Spiral or helical type

343702, 343815, H01Q 136

Patent

active

057541469

ABSTRACT:
An efficiently radiating helical antenna includes a conductive helix receiving signals to be radiated at a first end of the conductive helix device for capacitively pulling fields generated by the signals towards a second end of the conductive helix opposite the first end. The device may be a conductive tube inserted into the second end of the conductive helix or a disjointed conductive helix surrounding the conductive helix. This scheme works especially well for a conductive helix having a circumference on the order of one wavelength.

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Adams, "Helix Modes 1 and 2 of Klock" IEEE Transactions on Antennas and Propagation, vol. 16, No. 4, Jul. 1968, New York, USA, pp. 491-493.
Peterron, et al. "Propagation and Radiation Characteristics of the Tape Helix with a Conducting Core and Dielectric Substrate" IEEE Transactions on Antennas and Propagation, vol. 38, No. 4, Apr. 1990, New York, USA, p. 578.
Nakano, et al. "Axial Mode Helical Antennas" IEEE Transactions on Antennas and Propagation, vol. 34, No. 9, Sep. 1986, New York, USA, pp. 1145-1147.

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