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- Title
基于一种改进型DM5结构的极窄带SAW滤波器.
- Authors
赵雪梅; 郑泽渔; 董加和; 伍平; 陈彦光; 陈正林
- Abstract
An improved double-mode surface acoustic wave(DMS) structure is used to design an extreme narrow band SAW filter at 1. 5 GHz. The reflectors at both ends of the DMS structure adopt a distributed multi-period weighting structure, which can eliminate a variety of acoustic reflection modes propagating on the acoustic channel. A reflector is added between two interdigital transducers (IDT) in DMS structure to flexibly design the stopband suppression and bandwidth index of the filter. The results show that the developed extreme narrow band SAW filter has a center frequency of 1. 5 GHz, a measured bandwidth of 878. 75 kHz, insertion loss of 5. 8 dB, and stop-band suppression of 45 dB.
- Subjects
ACOUSTIC surface waves; BAND saws; INTERDIGITAL transducers; ACOUSTIC reflection; INSERTION loss (Telecommunication)
- Publication
Piezoelectrics & Acoustooptics, 2022, Vol 44, Issue 2, p253
- ISSN
1004-2474
- Publication type
Article
- DOI
10.11977/j.issn.1004-2474.2022.02.0120