Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Patent
1997-10-17
1999-08-10
Hellner, Mark
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
455422, 370339, H01Q 322, H04Q 700
Patent
active
059365773
ABSTRACT:
Features of an adaptive antenna are a controlling portion 11 as a method for detecting the communication amount of each beam and an antenna controlling portion 7 as a controlling method for controlling the pattern of each beam corresponding to information of the detected communication amount. In particular, an exciting weight of each antenna element is controlled corresponding to the detected communication amount and thereby the pattern of each beam is controlled. Thus, the communication amounts of individual beams can be flexibly well-balanced. Consequently, the communication capacity of the base station can be effectively used.
REFERENCES:
patent: 5548813 (1996-08-01), Charas et al.
patent: 5596329 (1997-01-01), Searle et al.
patent: 5734345 (1998-03-01), Chen et al.
patent: 5754139 (1998-05-01), Turcotte et al.
patent: 5815116 (1998-09-01), Dunbridge et al.
Simon C. Swales, et al., "The Performance Enhancement of Multibeam Adaptive Base-Station Antennas For Cellular Land Mobile Radio Systems", IEEE Transactions on Vehicular Technology, vol. 39, No. 1, Feb. 1990, pp. 56-67.
Mitsuhiko Mizuno, et al., Electronics & Communications in Japan, vol. 77, No. 2, pp. 48-58, Feb. 02, 1994, "Application of Adaptive Array Antennas to Radio Communications".
Mukai Manabu
Shoki Hiroki
Yokoi Tokihiko
Hellner Mark
Kabushiki Kaisha Toshiba
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