Compact SAW Duplexer for LTE Band 1 with High Isolation

TDK Corporation has announced a new duplexer for LTE Band 1 by EPCOS. It has a high 60 dB isolation for both the Tx and Rx paths. Based on SAW technology the B8651 duplexer has a miniature footprint and measures 1.8 mm x 1.4 mm. Due to 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 this new duplexer is its low insertion loss of only 1.9 dB in the Tx path, which leads to a further power savings and a longer battery life.

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