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Title:
RETRACTABLE RADIOTELEPHONE ANTENNAS AND ASSOCIATED RADIOTELEPHONE COMMUNICATION METHODS
Document Type and Number:
WIPO Patent Application WO1998030038
Kind Code:
A3
Abstract:
A multi-piece retractable radiotelephone antenna and associated communication method is employed to provide improved signal quality. The multi-piece antenna includes conductive windings, such as helical quadrafillar windings, disposed separately on two slidably cooperating substrate members. The antenna is mechanically extended to a deploy position and the separate windings are electrically connected thereby doubling the effective electrical length of the antenna. 00000

Inventors:
KARABINIS PETER D (US)
MA YAWEI (US)
REINHOLD STANLEY L (US)
Application Number:
US9723036W
Publication Date:
October 01, 1998
Filing Date:
December 04, 1997
Export Citation:
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Assignee:
ERICSSON INC.
KARABINIS, PETER, D.
MA, YAWEI
REINHOLD, STANLEY, L.
International Classes:
H01Q1/24; H01Q1/36; H01Q9/14; H01Q11/08; (IPC1-7): H04Q1/00; H04Q1/24
Foreign References:
US5504494A1996-04-02
US4868576A1989-09-19
US5138331A1992-08-11
EP0715369A11996-06-05
US4008479A1977-02-15
US5198831A1993-03-30
US2894260A1959-07-07
US5535435A1996-07-09
Other References:
CLARK R A AND MACLEAN T S M: "SERIES AND PARALLEL-FED LINEARLY POLARIZED HELICAL AERIALS" THE RADIO AND ELECTRONIC ENGINEER, vol. 28, July 1964, page 67-71 XP002061683 LONDON, GB
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