Speaker Information

Yanan Zhou

Deqing Huaying Electronics

Abstract

Surface acoustic wave (SAW) filters are critical components in modern RF communication systems, but abnormal in-band group delay characteristics can significantly impact system performance, particularly in applications requiring precise timing and phase coherence. This presentation presents comprehensive research findings on the causes, characterization, and mitigation of abnormal in-band group delay issues in SAW filters. We will investigate the fundamental mechanisms leading to group delay distortions, including acoustic wave scattering effects, electrode geometry influences, and substrate-induced anomalies. The research employs advanced measurement techniques and 3D electromagnetic-acoustic co-simulation methodologies to accurately characterize group delay behavior across different filter topologies and frequency ranges. Key findings include the identification of specific electrode configurations that minimize delay variations, the impact of temperature and power levels on delay stability, and the relationship between group delay characteristics and other filter parameters such as insertion loss and return loss. We will present practical design guidelines and compensation techniques that have been successfully implemented in production filters, demonstrating significant improvements in group delay flatness and overall filter performance.

Speaker Biography

Yanan Zhou is a Principal Research Engineer at Deqing Huaying Electronics, specializing in advanced SAW filter design and performance optimization. She holds a Ph.D. in Electronic Engineering from Zhejiang University and has over 10 years of experience in acoustic wave device research and development. Her expertise spans from fundamental acoustic wave theory to practical manufacturing considerations, with particular focus on solving complex performance challenges in next-generation RF filters. Dr. Zhou has led several research initiatives on group delay optimization, temperature compensation techniques, and power handling capabilities of SAW devices.

Key Achievements:

• Ph.D. in Electronic Engineering from Zhejiang University
• 10+ years experience in SAW filter research and development
• Expert in group delay analysis and optimization techniques
• Specialized in 3D EM-acoustic co-simulation methodologies
• Research leader in temperature compensation for SAW devices
• Published multiple papers on acoustic wave device performance