Multiple input antenna system

Details Multiple input antenna system Multiple input antenna system

H - Electricity

01

Q

351/19

H01Q 3/26 (2006.01) H01Q 21/20 (2006.01) H01Q 21/22 (2006.01)

Patent

CA 1071754

CM-74608 IMPROVED MULTIPLE INPUT ANTENNA SYSTEM ABSTRACT An improved antenna system is disclosed in which a single antenna array is simultaneously used in conjunction with several independent radio devices. Isolated and inde- pendent radio transmitters are coupled, without any signal cancellation, to each and every one of a plurality of isolated independent antenna elements by a combining network which maintains the isolation between each of the radio transmitters and each of the antenna elements. The com- bining network comprises an array of hybrid networks and creates a predetermined electrical phase difference between each signal received by an individual antenna element. The antenna elements form a single antenna array consisting of circularly disposed corner reflector antennas. Each re- flector independently creates an individual radiation pattern and these patterns combine to form a single desired composite radiation pattern. By maintaining isolation between each of a number of radio transmitters, a plurality of these transmitters may be used simultaneously in con- junction with a single antenna array.

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