Retractable antenna

Details Retractable antenna Retractable antenna

1994-12-21

1997-03-18

Wimer, Michael C.

Communications: radio wave antennas

Antennas

With radio cabinet

343895, 343900, H01Q 124

Patent

active

056127049

ABSTRACT:
A helical antenna (17)is permanently mounted onto the housing (15) of a radio transmitter/receiver, such as a mobile cellular telephone. An elongate antenna (18) is mountable within the housing so as to be movable between a retracted position (FIG. 1) and an extended position (2). The elongate antenna (18) has a conductive portion (18c) arranged to short-circuit the helical antenna (17) when said helical antenna is placed in its extended position.

REFERENCES:
patent: 4121218 (1978-10-01), Irwin et al.
patent: 5446469 (1995-08-01), Makino
Patent Abstracts of Japan, vol. 15, No. 213 (E-1073), May 30, 1991.
Motorola Technical Developments, vol. 19, Jun. 1993, p. 118, HEL/TEL Antenna, James T. Wiggenhorn.

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