Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Patent
1998-05-04
2000-06-27
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
H01Q 322, H01Q 324, H01Q 326
Patent
active
060812338
ABSTRACT:
An antenna arrangement and a method for obtaining such an antenna arrangement are disclosed. The antenna arrangement utilizes the beam ports of a beam forming network, e.g. a Butler matrix, in connection with a multi-element radiator antenna for obtaining receive/transmit channels having more antenna beams within a desired coverage. At least one extra signal combiner is utilized for combining at least one beam port of a number of ordinary beam ports with a nonadjacent beam port to form one receive/transmit channel in a number of desired receive/transmit channels. The particular receive/transmit channel uses the at least one extra signal combiner for combining at least one of a number of ordinary beam ports with a nonadjacent beam port normally being terminated, for adapting power and sensitivity distributions for a desired cell coverage or for desired coverage of overlapping cells.
REFERENCES:
patent: 4231040 (1980-10-01), Walker
patent: 4424500 (1984-01-01), Viola et al.
patent: 4638317 (1987-01-01), Evans
patent: 5812088 (1998-09-01), Pi et al.
Blum Theodore M.
Telefonaktiebolaget LM Ericsson
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