The CDU00418M00430MNSF from Concept Microwave is a Low PIM Cavity Duplexer with passbands from 418-420MH at low band port and 428-430MHz at high band port with PIM3 ≤-155dBc@2*34dBm. It has an insertion loss of less than 1.5dB and an isolation of more than 60 dB. The duplexer can handle up to 20 W of power. It is available in a module that measures 170mm x135mm x 39mm. This RF cavity duplexer design is built with N/SMA connectors that are female gender. Other configuration, such as different passband and different connector are available under different model numbers.
Low PIM stands for “Low passive intermodulation.” It represents the intermodulation products generated when two or more signals transit through a passive device with nonlinear properties. Passive intermodulation is a significant issue within the cellular industry and it is extremely difficult to troubleshoot. In cell communication systems, PIM can create interference and will reduce receiver sensitivity or may even inhibit communication completely. This interference can affect the cell that created it, as well as other nearby receivers.