FAQ - MCS + Filter, Combiners & Amplifiers
What is the difference between Cross Polar Ratio (CPR) and Isolation between Ports?
Cross Polar Ratio: Value which describes the difference between co-pol (equal polarisation) and cross-pol (unequal polarisation) signals of the radiated wave in the far field. Co-pol and cross-pol signals differ depending on the azimuth-angle. This is why there are two values: CPR in the main radiation direction and in the 120° sector. Isolation between ports: Value which describes decoupling between two inputs (+45° and -45°). A cross-polarised antenna should possess a minimum decoupling value of 30dB in order to optimally operate as receiver and transmitter at the same time. Isolation between ports relates to the antenna near-field.
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