September 4, 2014

Connectivity components: High-performance WLAN-Bluetooth filter for smartphones

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  • Excellent insertion loss and high out-of-band selectivity
  • Miniature dimensions of 1.1 mm x 0.9 mm x 0.4 mm

TDK Corporation presents a new EPCOS WLAN-Bluetooth filter that offers best-in-class performance and size for the coexistence of cellular, WLAN, Bluetooth and satellite navigation services on the same antenna. Based on advanced second-generation BAW technology (BAW2), the new EPCOS B8831 filter employs achieves a much better Q factor than existing components and features a significantly lower insertion loss of only 1.1 dB. With a miniaturized footprint of just 1.1 mm x 0.9 mm the 1109 package of the B8831 is also extremely thin with a height of just 0.4 mm.

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 2400 MHz and 2483 MHz is separated by just ≤20 MHz 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.

Main applications

  • WLAN and Bluetooth filter in smartphones

Main features and benefits

  • Excellent insertion loss of only 1.1 dB and high out-of-band selectivity
  • Miniature dimensions of 1.1 mm x 0.9 mm x 0.4 mm
  • Reduced power consumption of the smartphone

Further information on the products can be obtained from Sales at

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About TDK Corporation

TDK Corporation is a leading electronics company based in Tokyo, Japan. It was established in 1935 to commercialize ferrite, a key material in electronic and magnetic products. TDK's portfolio includes electronic components, modules and systems* which are marketed under the product brands TDK and EPCOS, power supplies, magnetic application products as well as energy devices, flash memory application devices, and others. TDK focuses on demanding markets in the areas of information and communication technology and consumer, automotive and industrial electronics. The company has a network of design and manufacturing locations and sales offices in Asia, Europe, and in North and South America. In fiscal 2014, TDK posted total sales of USD 9.6 billion and employed about 83,000 people worldwide.

* The product portfolio includes ceramic, aluminum electrolytic and film capacitors, ferrites, inductors, high-frequency components such as surface acoustic wave (SAW) filter products and modules, piezo and protection components, and sensors.