Antenna arrangement for a portable transceiver

Details Antenna arrangement for a portable transceiver Antenna arrangement for a portable transceiver

1989-08-02

1992-09-01

Wimer, Michael C.

Communications: radio wave antennas

Antennas

With radio cabinet

343745, 343901, 455127, H01Q 110, H01Q 124

Patent

active

051443244

ABSTRACT:
An arrangement for increasing the level of radiated and received energy in a telescoping antenna while the antenna is in a collapsed position. The increase in energy is obtained through use of a sliding member which projects from the base of the the antenna and contacts antenna matching circuitry for making changes to this circuitry when the antenna is collapsed. Initially tuned for resonating signals for transmission and reception with the antenna in an extended position, the antenna matching circuitry is retuned by a switching action provided by the sliding member for more effective resonating of these signals with the shorter length antenna. The switching action of the sliding member also activates gain control circuitry which increases the signal levels in both an associated transmitter and receiver when the antenna is in the collapsed position.

REFERENCES:
patent: 2719920 (1955-10-01), Ellis
patent: 4725845 (1988-02-01), Phillips
patent: 4958382 (1990-09-01), Imanishi

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