Title: Adjustable top loaded antenna

Abstract: An adjustable mobile antenna comprising an upper metal mast and a lower metal mast, the upper mast being telescopically received in the lower mast and adjustably movable longitudinally therein to vary the length of the antenna and thereby effect tuning thereof, a clamping member for releasably locking the upper mast in a selected position relative to the lower mast, a dielectric rod extending upwardly from the upper end of the upper metal mast, and a loading coil helically wound on the dielectric rod with a lower end of the coil connected to the upper metal mast adjacent the upper end thereof, and a protective outer jacket covering the loading coil, the antenna being tunable by simply adjusting its length.

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Inventors: Kowols, Gilbert J. (Park Ridge, IL, US)

Application Number: 757907
Filing Date: 1977-01-10
Publication_date: 1979-05-01
Assignee: Anixter Bros., Inc. (Skokie, IL)
Primary Class(es): 343/750 343/715
Other Classes:
US Patent Ref:

2966679	Dec, 1960	Harris	343/895.
3380062	Apr, 1968	George	343/903.
3541558	Nov, 1970	Rhein	343/901.

Other Refs:
Primary Examiner: Smith, Alfred E.
Assistant Examiner: Moore, David K.
Attorney: Pigott, Jr.; Charles F.