Low Passive Intermodulation (PIM) Switching Systems and RF Interface Units (RFIU)

With the growing number of radio signals needed to be presented to wireless devices, managing interaction between these signals is increasingly important. For example, in a cell site today, a base station may be required to transmit and receive GSM, EDGE, W-CDMA, and LTE signals while in the presence of professional mobile radio, WiMAX, microwave links, and other RF/microwave signals. Historically, a great deal of attention was paid to minimizing intermodulation products resulting from non-linearities of active components within an RF system. The growing demands on wireless devices require that now even passive intermodulation (PIM) needs to be carefully considered.