zampanampa
Junior Member level 3
In PCS-CDMA normally a duplexer (SAW, FBAR, ceramic) is used in mobile phones. But for example if you separate Tx and Rx antennas (or feed points) or even you have an additional Rx diversity path, single filters are required which take over the Tx-Rx-isolation functionality. But I heard that if you take the Rx filter part of the duplexer as stand-alone filter it has less isolation, then if it is built with the Tx-filter part together to built a duplexer. Can someone explain me this?