Multiple winding whip antenna assembly for radio circuit and met

Details Multiple winding whip antenna assembly for radio circuit and met Multiple winding whip antenna assembly for radio circuit and met

1995-04-19

1996-11-05

Le, Hoanganh

Communications: radio wave antennas

Antennas

With radio cabinet

343895, 343725, 343729, H01Q 124

Patent

active

055722245

ABSTRACT:
A nondirectional antenna assembly, and associated method, for a radio operative at high frequencies, such as at frequencies of approximately 1.8 Gigahertz. A first antenna portion, formed of a one-half wavelength, helical winding is supported at a distal side of a nonconductive whip. A second antenna portion, comprised of a helical winding supported at a proximal side of the nonconductive whip, and a one-quarter wave helical winding, connected to radio circuitry of the radio transceiver, couples the first antenna portion to the radio circuitry. Because the first antenna portion is positioned at a distal side of the nonconductive whip, shadowing occurring as a result of positioning the radio transceiver proximate to a user during operation thereof is less likely to interfere with operation of the radio transceiver.

REFERENCES:
patent: 4121218 (1978-10-01), Irwin et al.
patent: 4229743 (1980-10-01), Vo et al.
patent: 4725845 (1988-02-01), Phillips
patent: 4868576 (1989-09-01), Johnson, Jr.
patent: 5057849 (1991-10-01), Dorrie et al.
patent: 5177492 (1993-01-01), Tomura et al.
patent: 5204687 (1993-04-01), Elliott et al.
patent: 5258765 (1993-11-01), Dorrie et al.
patent: 5353036 (1994-10-01), Baldry
patent: 5374937 (1994-12-01), Tsunekawa et al.

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