Smithdom improved multiband antenna and method

Details Smithdom improved multiband antenna and method Smithdom improved multiband antenna and method

1995-03-06

1996-11-26

Le, Hoanganh T.

Communications: radio wave antennas

Antennas

With lumped reactance filter in active antenna

343749, 343752, H01Q 1112

Patent

active

055790178

ABSTRACT:
A broadband off-center fed dipole antenna capable of resonating at multiple frequencies with a near integer relationship between fundamental and harmonic frequencies and with standing wave ratio of less than or equal to 1.5:1 at desired frequencies without the need of an antenna tuning device. One preferred embodiment of the antenna comprises a first radiating section having an inner line electrically coupled to a balun transformer and a trap and an outer line electrically connected to the trap and an insulator. A second radiating section is connected to the balun transformer and has another insulator secured to its other end.

REFERENCES:
patent: 2229865 (1941-01-01), Morgan
patent: 2282292 (1942-05-01), Amy et al.
patent: 2989626 (1961-06-01), Welch
Minarik, "Adding 21MC To The Off-Center-Fed Antenna", Radio & TV News, Jun. 1958, p. 48.
DeMaw, "Lightweight Trap Antennas-Some Thoughts", ARRL Senior Technical Editor, Jun. 1983, pp. 15-18.

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