Communications: radio wave antennas – Antennas – Rod type
Patent
1997-09-02
1999-01-12
Wimer, Michael C.
Communications: radio wave antennas
Antennas
Rod type
343702, H01Q 110
Patent
active
058596224
ABSTRACT:
An antenna extender system includes a means for applying a bias force on the antenna to urge it toward an extended position, and a means for controlling the velocity of the antenna when it is moved from a retracted to the extended position by a constant bias force. The antenna extender system solves the problem of uncontrolled instantaneous extension of antennas in small, mobile telecommunication instruments.
REFERENCES:
patent: 2522222 (1950-09-01), Haller
patent: 4725845 (1988-02-01), Phillips
patent: 4811564 (1989-03-01), Palmer
patent: 4990929 (1991-02-01), Nakase et al.
patent: 5168278 (1992-12-01), Morita
Patent Abstracts of Japan, vol. 18, No. 509 (E-1610), 26 Sep. 1994 JP 06 177622A.
Ericsson Inc.
Wimer Michael C.
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