Analysis Of The Mutual Coupling Effects Between Diversity Antennas In The Base Station By The Method Of Moments

In the base-station (BS) diversity antenna system for cellar communication, the analysis of the mutual coupling effects between the BS antennas is a very important theoretical and practical issue for the installation of BS diversity antennas. The mutual coupling effects between the BS diversity antennas are analyzed using the Method of Moments in this thesis. First the radiation patterns of the single vertically polarized BS antenna is analyzed using MoM. In order to validate the method, the patterns of the BS antenna are measured, and the calculated data are in good agreement with the measured results. Then the mutual coupling between BS diversity antennas are described in detail for the horizontal spaced diversity antenna system. The mutual coupling effects between BS diversity antenna and another BS antenna operating at different frequency are simulated according to several typical installations and some useful conclusions are also made from the viewpoint of antennas. Finally, the performances of the polarization diversity BS antennas are studied. The radiation patterns of the ±45° polarized BS antennas are analyzed using MoM, and the receiving performances of the vertically polarized and dual-polarized BS antennas are compared when a mobile phone is transmitting.