Multiplex communications – Communication over free space – Plural usage of common antenna
Patent
1997-06-12
2000-06-27
Patel, Ajit
Multiplex communications
Communication over free space
Plural usage of common antenna
455562, 455561, H04H 100, H04B 7185
Patent
active
060815159
ABSTRACT:
The present invention relates to an arrangement at transmission of a number of signals each having a frequency component, between a base station unit and an antenna arrangement having a number of radiation element. The base station unit includes a combiner unit in which signals containing a frequency component are combined to a multi-frequency signal which is transmitted to the antenna arrangement (20). This includes a power dividing unit (3) in which the multi-frequency signal is divided into a number of, preferably similar multi-frequency subsignals and a number of controllable filter arrangements (4.sub.1, . . . , 4.sub.n) for extracting a number of signals essentially consisting of a frequency from multi-frequency subsignals. Moreover, the antenna arrangement includes a number of amplification devices (5.sub.1, . . , 5.sub.n), in which single-frequency signals are amplified for feeding to a number of radiation elements (6.sub.1, . . . , 6.sub.n).
REFERENCES:
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patent: 5210541 (1993-05-01), Hall
patent: 5475394 (1995-12-01), Kohls
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patent: 5596329 (1997-01-01), Searle
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patent: 5734345 (1998-03-01), Chen
Patel Ajit
Pizarro Ricardo M.
Telefonaktiebolaget LM Ericsson
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