Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Directional antennas pointing in different directions.
Polarisation. One horizonal, one vertical.
If using vertical antennas put one underneith the other. What you do with the feeder if you have the rx/tx elsewhere is a problem of course.
Physical seperation. Put the antennas far away from each other, perhaps miles away from each other with the audio/data sent to where it is needed using a long cable, a telephone line or another radio system on a different frequency.
In some applications a circulator might be usfull.
Isolation usefull application in mobile basestation antenna(directional antenna) (polarisation diversity technique), one antenna have two polarise,in commercial call cross polar antenna.
In mobile basestation application using two polarise at same time and freq thus a definition of Isolation are signal coupling between two polarise normally using -30 dB.
To many text book on antenna for molile application.