Telecommunications – Transmitter and receiver at same station – With a common signal processing stage
Patent
1996-12-20
1997-10-14
Pham, Chi H.
Telecommunications
Transmitter and receiver at same station
With a common signal processing stage
455 90, 455100, 455129, 4552771, 455289, 343718, H04B 1034, H04B 118
Patent
active
056782020
ABSTRACT:
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.
REFERENCES:
patent: 4181889 (1980-01-01), Davis et al.
patent: 4975711 (1990-12-01), Lee
patent: 5170173 (1992-12-01), Krenz et al.
patent: 5335368 (1994-08-01), Tamura
patent: 5337061 (1994-08-01), Pye et al.
H. E. King, "Characteristics of Body-Mounted Antennas for Personal Radio Sets", IEEE Transactions on Antennas and Propagation, Mar. 1975, pp. 242-244.
M. David Sullivan, "A Human Plate Antenna", RF Design, rfi/emc corner, Apr. 1990, pp. 52-58.
Filimon Cristian C.
Gundavajhala Anand
Jacobs Stephen M.
Pham Chi H.
Plantronics Inc.
LandOfFree
Combined antenna apparatus and method for receiving and transmit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Combined antenna apparatus and method for receiving and transmit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Combined antenna apparatus and method for receiving and transmit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1563174