H - Electricity – 01 – Q
Patent
H - Electricity
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Q
H01Q 1/00 (2006.01) H01Q 1/24 (2006.01) H01Q 1/27 (2006.01) H01Q 1/52 (2006.01) H01Q 21/28 (2006.01) H04B 1/38 (2006.01) H04B 5/00 (2006.01) H04M 1/00 (2006.01) H04B 1/18 (2006.01)
Patent
CA 2178382
An antenna system and method for use in a portable unit of a wireless telephone headset, wireless telephone headset adapter, or other telecommunication device combines a capacitive coupling antenna with an electric field sensitive antenna. The electric field sensitive antenna, such as a monopole antenna, receives and transmits RF signals when the portable unit is located remote from the user. A patch antenna receives and transmits RF signals when the portable unit is located proximate to, for example is worn by, the user. The patch antenna is a conductive surface for capacitively coupling to a user's body which acts as a radiating and receiving medium. Both the patch antenna and monopole antenna are coupled to an antenna port by matching circuits to tune each antenna for desired RF characteristics. When worn by the user, the RF effects of the monopole antenna are negligible and the patch antenna operates as the primary antenna. When located remotely from the user, the patch antenna will not be capacitively coupled to a body and the RF effects will be negligible as compared with the RF effects of the monopole antenna. The portable unit of a wireless headset receives and transmits signals when the portable unit is located either proximate to the user or remote from the user.
Filimon Cristian C.
Gundavajhala Anand
Jacobs Stephen M.
Plantronics Inc.
Sim & Mcburney
LandOfFree
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