Telecommunications – Transmitter and receiver at same station – With transmitter-receiver switching or interaction prevention
Patent
1998-06-26
2000-08-29
Bost, Dwayne D.
Telecommunications
Transmitter and receiver at same station
With transmitter-receiver switching or interaction prevention
455 82, H04B 144, H04B 146
Patent
active
061120618
ABSTRACT:
Known is a radio communication device such as a GSM handset with receive-transmit antenna switching means such as a duplexer or a transmit receive switch. In GSM handsets it is highly desirable to save battery power as much as possible. To this end in the receive and transmit paths, the power supplied to components is switched off when functioning of such components is presently not needed. Proposed is a radio communication device in which the receive-transmit switch is a couple of electromechanical switches, preferably ultra-miniature Reed relays, of which the actuating coils are connected in series with at least one DC-supplied circuit of the receive path or transmit path.
REFERENCES:
patent: 3988675 (1976-10-01), Dykas
patent: 4853972 (1989-08-01), Ueda et al.
patent: 5477532 (1995-12-01), Hoshigami et al.
patent: 5723912 (1998-03-01), Ahrabian et al.
patent: 5909196 (1999-06-01), O'Neill, Jr.
By H.W. Tuttlebee "Cordless Telecommunications in Europe" Springer-Verlag London Ltd., 1990 pp. 213, 219 and 223.
By K. Hinohara et al., "Magnetic and Mechanical Design of Ultraminiature Reed Switches" IEEE Transactions on Components, Hybrids, and Manufacturing Technology, vol. 15, No. 2, Apr. 1992, pp. 172-176.
"ALEPH" Reed Relays of the US Company Ceejay, pp. 1-5.
Bost Dwayne D.
Legree Tracy M.
U.S. Philips Corporation
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