THE OPTIMIZATIONG OF LOW-LOSS SAW FILTER WITH HIGH RECTANGLE FACTOR
High rectangle factor has been one of the most impressive characters of SAW filter, especially lowloss SAW filters used in recent years. Many experts dedicated to this kind of research and obtained some excellent results, many improvements were promoted as well. This paper starts form frequency dependent COM parameters extraction method, discussing the pitchmodulated IDTs and reflectors structure and in between shorted-grating structure, high rectangle factor, low-loss DMS can be easily designed by using COM model and global optimization algorithm. Some optimized results have been given in this paper; High precision Stepper and lift-off technology be used in order to realize these filters, the results are in accordance with theory simulation well, the most important is the yield of product has been greatly improved.
COM DMS rectangle factor.
Xiang-long SHI Xiao-yang CHEN Ke-xiang Bao Pei-gen Zhou
Beijing Changfeng SAW company, Beijing 100854, China
国际会议
深圳
英文
250-252
2011-12-09（万方平台首次上网日期，不代表论文的发表时间）