IIDT TYPE LOW-LOSS SAW FILTERS USING WITHDRAWAL-WEIGHTED TRANSDUCERS

被引：1

作者：

YATSUDA, H

TAKEUCHI, Y

HORISHIMA, T

YAMASHITA, K

机构：

[1] Japan Radio Co Ltd., Kamifukuoka, Saitama, 356, Laboratory, 2-1-4, Fukuoka

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1992年 / 31卷

关键词：

SAW FILTER; INTERDIGITATED INTERDIGITAL TRANSDUCERS; IIDT; WITHDRAWAL WEIGHTING; LOW LOSS;

D O I：

10.7567/JJAPS.31S1.222

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This paper describes a method of designing IIDT SAW filters with suppressed sidelobes and reduced insertion loss. The method employs withdrawal-weighted transducers which have almost the same frequency response in pass band and different trap-frequencies in stop bands. An 880 MHz filter was designed and fabricated according to the proposed method. The sidelobe suppression of 25 to 35 dB, the minimum insertion loss of 1.6 dB, and the 0.5 dB bandwidth of more than 20 MHz were realized.

引用

页码：222 / 223

页数：2