Multiplex communications – Duplex – Communication over free space
Reexamination Certificate
2011-03-22
2011-03-22
Lee, Andrew (Department: 2472)
Multiplex communications
Duplex
Communication over free space
C370S281000, C370S252000, C375S229000
Reexamination Certificate
active
07911986
ABSTRACT:
An apparatus and method for measuring bi-directional radio channel with multiple antenna are provided. The apparatus includes a transmitter for amplifying a signal that is frequency-up converted to radio frequency and removing a signal of other frequency band, a high power multiplexing switch for sequentially transferring transmitting signals from the transmitter to a corresponding circulator, a plurality of circulators for transferring the transmitting signals from the high power multiplexing switch to a corresponding antenna among multiple antennas, and transferring a receiving signal from a corresponding antenna, a low loss multiplexing switch for receiving the receiving signal from the corresponding circulator, and sequentially transferring the receiving signal; and a receiver for receiving the receiving signal from the low loss multiplexing switch, removing undesired frequency components from the receiving signal except a desired frequency band and low-noise amplifying the desired frequency band of the receiving signal.
REFERENCES:
patent: 6859503 (2005-02-01), Pautler et al.
patent: 2001/0001617 (2001-05-01), Koga et al.
patent: 2006/0126577 (2006-06-01), Yano et al.
patent: 2007/0022460 (2007-01-01), Kim et al.
patent: 2008/0122693 (2008-05-01), Needham et al.
patent: 2008/0130526 (2008-06-01), Che
patent: 2008/0219670 (2008-09-01), Kim et al.
patent: 2008/0290962 (2008-11-01), Kim et al.
patent: 2010/0008267 (2010-01-01), Moon et al.
patent: 1585246 (2005-10-01), None
patent: 10-2003-0085101 (2003-01-01), None
patent: 10-2006-0023525 (2003-03-01), None
patent: 10-0434530 (2004-05-01), None
patent: 10-2005-0098413 (2005-10-01), None
International Search Report of International Application No. PCT/KR2007/005394 filed on Oct. 30, 2007.
Zhang Ming, Zhang Jianhua, Jiang Lei, Zhang Ping and Wu Yufei, 3.5GHz Broadband Propagation Measurement in Beijing, Wireless World Research Forum, Mar. 2005, WG4, pp. 1-6.
Jarmo Kivinen, Timo O. Korhonen, Pauli Aikio, Ralf Gruber and Pertti Vainikainen, Wideband Radio Channel Measurement System at 2 GHz, IEEE Transaction on Instrumentation and Measurement, Feb. 1999, vol. 48, pp. 39-44.
Chung Hyun-Kyu
Kwon Heon-Kook
Lee Kwang-Chun
Electronics and Telecommunications Research Institute
Kile Park Goekjian Reed & McManus PLLC
Lee Andrew
LandOfFree
Apparatus and method for measuring bi-directional radio... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for measuring bi-directional radio..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for measuring bi-directional radio... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2677475