Theoretical research and verification on SAW multiplexer synthesis based on the COM model

Abstract

As core components of radio frequency (RF) front-ends, surface acoustic wave (SAW) filters and duplexers rely on the acoustic wave propagation characteristics of piezoelectric materials, and have become particularly important, driven by the dual demands of multi-band compatibility and integration. However, the traditional design processes are complex and time-consuming, requiring multiple rounds of analysis, simulation, and experimental testing. In contrast, the synthesis method provides a systematic framework for filter design, which can simplify the design flow, shorten the development cycle, and ensure the achievement of optimal performance. This paper elaborates on the optimized design process from theoretical parameters to physical structures. Targeting the synthesis of a duplexer for the 5G n1 frequency band, a systematic design process with simulation verification is realized in combination with the COM model, which verifies its feasibility.