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Title:
MULTI-BAND ANTENNA FOR WIRELESS APPLICATIONS
Document Type and Number:
WIPO Patent Application WO2005011051
Kind Code:
A3
Abstract:
A folded monopole antenna (200) that supports lower and upper frequency bands may be used in CDMA, WLAN, or other wireless communications systems. The folded monopole antenna may be located in a handset next to a vertical ground plane (220). The folded monopole antenna may be folded at least twice and connected to the ground plane (220) through a reactance. The dimensions of different sections of the folded monopole antenna define lower and upper frequency band characteristics, and an offset location of an input feed (300) affects the bandwidth of the frequency bands. The reactance (305, Fig. 4B) between the antenna and ground plane can be selected to fine tune the frequency bands. Various input feeds, including a co-planar waveguide, may be employed. Dynamically adjustable reactances may be used in the input feed and ground line for adapting the antenna to various environments.

Inventors:
CHIANG BING
LYNCH MICHAEL J
WOOD DOUGLAS H
Application Number:
PCT/US2004/023268
Publication Date:
March 24, 2005
Filing Date:
July 20, 2004
Export Citation:
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Assignee:
IPR LICENSING INC (US)
International Classes:
H01Q1/24; H01Q5/00; H01Q5/10; H01Q5/357; H01Q5/364; H01Q9/40; H01Q9/42; H01Q11/02; (IPC1-7): H01Q1/24; H01Q1/50
Foreign References:
US6683575B22004-01-27
US6680704B22004-01-20
US6630909B22003-10-07
Other References:
See also references of EP 1656711A4
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