November 11, 2014

SAW components: Compact SAW duplexer with excellent isolation in the transmit and receive paths

No picture available

TDK Corporation presents a new EPCOS duplexer for LTE Band 1, which at 60 dB features very high isolation for both the Tx and Rx paths. Based on SAW technology the B8651 duplexer has a miniature footprint of just 1.8 mm x 1.4 mm.

Thanks to the very good separation of the Tx and Rx signals, the new EPCOS duplexer can be combined with power-saving envelope tracking power amplifiers without any additional prefiltering. This significantly simplifies the design of the front end, leading to major cost benefits. A further advantage of the new duplexer is its low insertion loss of only 1.9 dB in the Tx path, which leads to a further power saving and thus a longer operating life of the battery. Applications are smartphones, tablets as well as LTE USB sticks for notebooks.

Main applications

  • Smartphones, tablets and LTE USB sticks

Main features and benefits

  • Excellent isolation of 60 dB
  • Low insertion loss in the Tx band of only 1.9 dB
  • Can be combined with envelope tracking power amplifiers without additional filters

Further information on the products can be obtained from Sales under

Please forward reader inquiries to

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* 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.