Wide-band antenna and tuning method

Details Wide-band antenna and tuning method Wide-band antenna and tuning method

1998-07-28

1999-11-23

Wong, Don

Communications: radio wave antennas

Antennas

With lumped reactance for loading antenna

343750, 343901, H01Q 900

Patent

active

059908416

ABSTRACT:
An antenna that comprises a rod, a movable coil, and a holding section which holds the movable coil in a manner that allows the movable coil to slide in and out of the holding section. When the movable coil is drawn into the holding section, the holding section tunes to a particular desired frequencies in the upper portion of the VHF band and the UHF band; for example, 144 MHz and 430 MHz. When the movable coil is out of the holding section, the holding section, the rod, and the portion of the movable coil outside the holding section form antenna element of a center-loading type that tunes to frequencies in the HF band and the lower portion of the VHF band; for example, frequencies in the range of 3MHz to 50MHz. The tuning frequency is varied by sliding the position of the coil.

REFERENCES:
patent: 2781514 (1957-02-01), Sichak et al.
patent: 2854667 (1958-09-01), Taylor et al.
patent: 5164739 (1992-11-01), Koide et al.
"Model HS-1500" and "Model HS-1600" placed on the market by High Sierra Antenna (Date and pages are not provided).
"BB-3" put on the market by T. J. Antenna Company.

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