Telecommunications – Carrier wave repeater or relay system – Two separate way transmission
Patent
1995-10-23
1998-09-22
Urban, Edward F.
Telecommunications
Carrier wave repeater or relay system
Two separate way transmission
455 19, 370279, 370315, H04B 7155
Patent
active
058129332
ABSTRACT:
A duplex RF repeater for use in a personal communications system distributes and enhances time division duplexed signals at a single RF carrier. The duplex RF repeater includes an up-link amplifier and a down-link amplifier which amplify the time division duplexed signals at the single RF carrier. The repeater also includes a down-stream antenna, which links the repeater with a subscriber, and a controller which decreases the gain of one of the up-link or the down-link amplifiers when an RF signal is present at the other of the up-link or the down-link amplifiers to prevent self-oscillation caused by over coupling between the two amplifiers.
REFERENCES:
patent: 3480961 (1969-11-01), Copeland et al.
patent: 3729740 (1973-04-01), Nakahara et al.
patent: 4154978 (1979-05-01), Tu
patent: 4335385 (1982-06-01), Hall
patent: 4400703 (1983-08-01), Shiokawa et al.
patent: 4509199 (1985-04-01), Ichihara
patent: 4577327 (1986-03-01), Nambu
patent: 4704733 (1987-11-01), Kawano
patent: 4754495 (1988-06-01), Kawano et al.
patent: 4849963 (1989-07-01), Kawano et al.
patent: 5010583 (1991-04-01), Parken
patent: 5095528 (1992-03-01), Leslie et al.
patent: 5115514 (1992-05-01), Leslie
patent: 5187806 (1993-02-01), Johnson et al.
patent: 5200955 (1993-04-01), McFarlane et al.
patent: 5227742 (1993-07-01), Suzuki
patent: 5321736 (1994-06-01), Beasley
patent: 5377255 (1994-12-01), Beasley
patent: 5519691 (1996-05-01), Darcie et al.
Search Report (dated Sep. 9,1994) prepared by European Patent Office against European counterpart.
"Antenna Engineering Handbook", p. 109, Ohm Corporation.
S. Rampalli, et al., "Recent Advances in the Designs of Radiating (Leaky) Coaxial Cables", International Wire & Cable Symposium Proceedings, pp. 66-77 (1991).
B. Cook, "Novel Applications of Radiating Feeder", Motorola, Inc. Technical Developments, vol. 17, Dec. 1992, pp. 142-144.
Wissenschaftliche Berichte Aeg telefunken, vol. 51, No. 2/3, Oct. 1978, Berlin De, pp. 167-175, Eine Streifenleitungs-Richtantenne fur den Frequenzbereich 2 bis 40 GHz.
1983 International Symposium Digest Antennas and Propagation, vol. 1, May 1983, Houston, Texas, pp. 162-165, S. Nishimura, "Crank-Type Circularly Polarized Microstrip Linc Antenna".
Proceedings of the National Communications Forum, vol. 43, No. 2, Oct. 1989, Oak Brook, IL., pp. 892-900, T. Burke, "Cellular Coverage In Buildings/Tunnels".
IEEE Transactions on Vehicular Technology, vol. VT-29, No. 3, Aug. 1980, NY, pp. 305-316, T. Suzuki, et al., "Design of a Tunnel Relay System with a Leaky Coaxial Cable in an 800-MHz Band Land Mobile Telephone System".
Oades, John W., "The Linear RF Repeater", ICC '80 Conference Record, vol. 1 of 3, pp. 6.2.1-6.2.5, Jun. 8-11, 1980.
Radio Communication Systems Ltd.
Urban Edward F.
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