Communications: radio wave antennas – Antennas – Spiral or helical type
Patent
1998-08-19
2000-08-22
Wong, Don
Communications: radio wave antennas
Antennas
Spiral or helical type
343702, H01Q 136
Patent
active
061079774
ABSTRACT:
A helical antenna having a radiator portion formed on a flexible substrate and a rigid substrate with a center feed element electrically connected to the radiator portion. The flexible substrate is supported by a support assembly with the radiator portion spaced substantially equidistant from the center feed element. The support assembly includes a first non-conductive member mounted to one surface of the rigid substrate at a first location, a second non-conductive member mounted to a second surface at the first location, a third non-conductive member mounted to the one surface at a second location spaced from the first location, and a fourth non-conductive member mounted to the second surface at the second location. A tool for assembling the helical antenna is provided having a base member with a plurality of elongated members mounted thereon substantially equidistant from each other and extending outwardly therefrom. A plurality of holes formed in the elongated members removably receive pins when in registration with holes in the flexible substrate. A rotatable tuning cap for fine tuning the antenna may be used having a plurality of tuning elements extending axially with the central antenna axis.
REFERENCES:
patent: 5191352 (1993-03-01), Branson
patent: 5612707 (1997-03-01), Vaughan et al.
Gulino Ronald
Tassoudji Mohammad A.
Nguyen Hoang
Ogrod Gregory D.
Qualcomm Incorporated
Wadsworth Philip R.
Wong Don
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