November 2014

SAW components

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

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



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