BAW PCS-Duplexer chipset and Duplexer applications

In this paper, TriQuint´s BAW PCS duplexer chipset will be presented, showing it´s performance in a PCS power-amplifier front end module (FEM). Besides having a low insertion loss and a high rejection and isolation, today´s application requirements dictate that special attention has to be paid to non-linearity (harmonics). This applies to the behavior of the single TX/RX chips as well as the duplexer as a system. Measurements of corresponding performance parameters will be shown and compared with previous, less optimal designs. Furthermore, power handling capabilities and corresponding improvements are discussed briefly. To optimize the duplexer performance and reduce the required number of laminate design cycles, electro-magnetic simulations of the whole duplexer application have been performed. A comparison between the simulated and measured performance will be presented, displaying the good agreement between theory and measurement.