Miniature FBAR Band 2 High Isolation Duplexers Designed for UMTS Handsets, Data Terminals

Avago Technologies has developed a miniature PCS duplexer that has been specifically designed for use in UMTS Band 2 handsets. The ACMD-7407 duplexer, which is the latest addition to Avago’s family of PCS duplexers, is 33 percent smaller than its previous versions. Designed using Avago’s FBAR technology, this UMTS duplexer has a common footprint and targets designers of PCS handsets, and data terminals operating on the U.S. PCS frequency band.

The ACMD-7407 is a low insertion loss, high isolation duplexer that was developed using Avago’s innovative Microcap bonded-wafer chip scale packaging technology. This process enabled this UMTS PCS duplexer to be assembled in a molded chip-on-board module that is less than 0.9mm high with a footprint of 2x2.5mm. Additionally, the ACMD-7407 duplexer enhances the sensitivity and dynamic range of PCS receivers by providing more than 55dB isolation of the transmitted signal at the receiver input, and more than 47dB rejection of transmit-generated noise in the receive band, thus enabling the removal of interstage Tx and Rx filters.

Avago’s ACMD-7407 provides a maximum insertion loss in the Tx channel of only 2.7dB, minimizing current drain from the power amplifier. Insertion loss in the Rx channel is 3.2dB maximum to improve receiver sensitivity.

Avago Technologies


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