Communications: radio wave antennas – Antennas – With coupling network or impedance in the leadin
Patent
1997-12-24
1999-07-13
Le, Hoanganh
Communications: radio wave antennas
Antennas
With coupling network or impedance in the leadin
343797, 343800, H01Q 2100
Patent
active
059233036
ABSTRACT:
An antenna system with both spatial and polarization diversity having a first antenna aperture and a second antenna aperture, a polarization separation angle formed by the difference between the polarization angle of the first antenna aperture and the polarization angle of the second antenna aperture, and a vertical separation formed by mounting the second antenna aperture a vertical distance above the first antenna aperture, such that diversity gain is achieved by both the polarization angle and the vertical distance. The combination of spatial and polarization diversity allows closer antenna aperture spacing and non-orthogonal polarization angles.
REFERENCES:
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patent: 5255004 (1993-10-01), Berkowitz et al.
patent: 5546096 (1996-08-01), Wada
Publication entitled "Polarization Diversity in CDMA", by Francesco Sapienza, Martin Nilsson and Claes Beckman, Allgon System AB, Box 541, 183 25 Taby, Sweden.
Publication entitled "Polarization Diversity for Cellular Base Stations at 18000 Mhz", Master of Science Thesis, Ulrik Wahlberg, Jan. 14, 1997.
Publication entitled "Space vs. Polarization Diversity Gain in 2 GHz PCS 1900", Paul Donaldson, Robert Ferguson, Eric Kmiec and Robert Voss, MCI Telecommuications Corporation.
Publication entitled "Polarization Diversity in Mobile Communications", Rodney G. Vaughan, IEEE Transactions on Vehicular Technology, vol. 39, No. 3, Aug. 1990.
Book entitled Mobile Communications Design Fundamentals, 2.sup.nd Ed., William C.Y. Lee, 1993, John Wiley & Sons. pp. 202-207.
Book entitled "The Mobile Radio Propagation Channel", J. D. Parsons, 1992, Pentech Press, pp. 142-145.
Book entitled "The Mobile Communications Handbook", Jerry D. Gibson, Edition-in-Chief, 1996, CRC Press, p. 174.
Perini Patrick L.
Schwengler Thomas
Le Hoang-anh
U S West, Inc.
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