Antenna arrangement for a portable transceiver

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

1991-04-15

1993-05-18

Wimer, Michael C.

Communications: radio wave antennas

Antennas

With variable reactance for tuning antenna

343702, 343860, 343901, 455121, H01Q 110

Patent

active

052124916

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 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: 4642650 (1987-02-01), Morton
patent: 4803493 (1989-02-01), Jamison
patent: 4862182 (1989-08-01), Egashira
patent: 4890114 (1989-12-01), Egashira

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