Adjustable antenna arrangement for a portable radio

Details Adjustable antenna arrangement for a portable radio Adjustable antenna arrangement for a portable radio

1977-08-03

1978-10-17

Smith, Alfred E.

Communications: radio wave antennas

Antennas

With radio cabinet

343750, 343895, H01Q 124, H01Q 900, H01Q 136

Patent

active

041212185

ABSTRACT:
An extendable half-wave dipole is capacitively coupled to a driven resonant helical antenna for use as on a hand-held, two-way portable radio, the helix being end fed. The dipole may be mounted adjacent to or collinear with the axis of the helix. The collinear mounting requires non-conductive portions on each end of the dipole. Optimum dimensional and performance characteristics are available without switching.

REFERENCES:
patent: 2419611 (1947-04-01), Walsh
patent: 2948894 (1960-08-01), Carpenter, Jr.
patent: 3104394 (1963-09-01), Yokoyama
patent: 3543275 (1970-11-01), Wendell

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