APPLICATION NOTE
Design of a BAW Quadplexer Module Using
AWR Software
With the development of the LTE-Advanced and orthogonal frequency division multiple
access (OFDMA) techniques, multiple carrier technology has become important in the mobile
communication industry. Designers are meeting the challenge of working with multi-carrier
signal-frequency systems by using diplexers and duplexers in RF circuits to separate different
carriers. For example, two carrier signals can be separated by using a diplexer. The transmit
(TX) and receive (RX) aggregated-carrier functionality is greatly enhanced by compact-
designed duplexers and multiplexers.
This application note describes the design of a carrier aggregation (CA) bulk acoustic wave
(BAW) quadplexer module. The module is intended for the LTE-3 and LTE-7 bands, with high
in-band and cross-band isolation. Qorvo TQQ1003 and TQQ1007 BAW duplexers were used for
the duplexer and the circuit was designed with the Cadence
®
AWR Design Environment
®
platform, specifically Cadence AWR
®
Microwave Office
®
circuit design software. The design is
described in steps: filter, T-junction, diplexer, and quadplexer.