Improvements in or relating to antennas

An antenna system (133), is comprised of a plurality of independently constructed and operated antenna units, upon which are mounted a plurality of transmit and receive antenna pairs. This provides a means for the antenna system (133) to be arranged to provide substantially hemispherical radio cover...

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Bibliographic Details
Main Authors GREEN, CHARLES RALPH, TARRAN, CHRISTOPHER JOHN, ROBERTS, ALBERT KESTER, WRIGHT, PETER JOHN
Format Patent
LanguageEnglish
French
German
Published 09.04.1997
Edition6
Subjects
ANTENNAS, i.e. RADIO AERIALS
BASIC ELECTRIC ELEMENTS
ELECTRICITY
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Summary:An antenna system (133), is comprised of a plurality of independently constructed and operated antenna units, upon which are mounted a plurality of transmit and receive antenna pairs. This provides a means for the antenna system (133) to be arranged to provide substantially hemispherical radio coverage. By adjusting the phase of each version of a radio signal to be transmitted or received, the signal may be formed into a beam, according to the known technique of directional beam forming, providing the antenna system with directional gain. Furthermore, using a plurality of transmit and receive antenna pairs reduces the energy transmitted by each transmit antenna alone to a level which permits a branch line coupler to be sufficient to orthogonally polarise the transmitted and received radio signals, negating the requirement for a duplexing filter for duplex operation.
Bibliography:Application Number: EP19960114526