Helical antenna and method of making same

Details Helical antenna and method of making same Helical antenna and method of making same

1996-09-26

1999-05-11

Wimer, Michael C.

Communications: radio wave antennas

Antennas

With housing or protective covering

343788, 343895, H01Q1/36;1/40

Patent

active

059032421

ABSTRACT:
A helical antenna is provided in which a predetermined resonance frequency can be determined at the design stage. The helical antenna includes a conductor which is formed from copper or a copper alloy inside a base in the shape of a rectangular parallelopiped formed from a dielectric material having barium oxide, aluminum oxide and silica as main constituents and which is wound in a helical shape along the length of the base. In such a case, the resonance frequency f0 of the helical antenna and the inductance components L of the conductor satisfy the relationship: ln (L)=A0+A1.times.ln (f0), where ln is a natural logarithm, and A0 and A1 are constants. One end of the conductor is extended onto the surface of the base and forms a power feeding terminal connected to a power feeding terminal formed on the surface of the base for applying a voltage to the conductor, and the other end thereof forms a free end inside the base.

REFERENCES:
patent: 3638226 (1972-01-01), Brooks et al.
patent: 3823403 (1974-07-01), Walter et al.
patent: 4772895 (1988-09-01), Garay et al.
patent: 5146235 (1992-09-01), Frese
The ARRL Antenna Book, Published by The ARRL, Newington, CT., pp. 6-6 to 6-8, 15.sup.th ed., 1988.

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