WLAN-Bluetooth filter prevents signal interference

The EPCOS WLAN-Bluetooth filter developed by TDK Corporation boasts performance and size that allow the coexistence of cellular, WLAN, Bluetooth and satellite navigation services on the same antenna.

Based on advanced second-generation BAW technology (BAW2), the EPCOS B8831 filter achieves a much better Q factor than existing components and features a significantly lower insertion loss of only 1.1dB. With a miniaturised footprint of just 1.1mm x 0.9mm the 1109 package of the B8831 is also extremely thin with a height of just 0.4mm.

RF spectrum is a limited resource, and with the continuously growing number of communication services, it is becoming ever more densely populated. In particular, the WLAN and Bluetooth band between 2,400MHz and 2,483MHz is separated by just approximately 20MHz from the new bands 7, 40, and 41 that are used for LTE cellular service.

Thanks to the new filter's excellent insertion loss and high out-of-band selectivity, the B8831 is able to prevent the signals in the adjacent WLAN/Bluetooth and highband cellular bands from interfering with each other. This helps to reduce power consumption in smartphones without affecting performance.