Method of producing a helical antenna and the helical antenna ap

Details Method of producing a helical antenna and the helical antenna ap Method of producing a helical antenna and the helical antenna ap

1998-11-04

2000-06-06

Wong, Don

Communications: radio wave antennas

Antennas

Spiral or helical type

343853, 343700MS, H01Q 136

Patent

active

060724412

ABSTRACT:
A helical antenna capable of covering a plurality of frequency bands and using a common feeder system for antenna elements adjusted to the respective frequency bands. First and second antenna elements having lengths corresponding to wavelengths of the frequency bands to be used are arranged helically at a specified pitch angle and spaced apart in the circumferential direction of a cylindrical body on the surface of a dielectric sheet wound around the outer circumferential surface of the cylindrical body. Coupling lines to be electromagnetically coupled to one-side ends of the antenna elements being adjacent to one another are formed on the surface of the dielectric sheet. A signal is fed from a common feeder circuit through the coupling lines to the respective antenna elements.

REFERENCES:
patent: 5198831 (1993-03-01), Burrell et al.
patent: 5346300 (1994-09-01), Yamamoto et al.
patent: 5706019 (1998-01-01), Darden, IV et al.
patent: 5828348 (1998-10-01), Tassoudji et al.

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