Correspondence-Design of ladder-type SAW/BAW

被引：0

作者：

机构：

[1] State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Sichuan

[2] Department of Electrical and Electronic Engineering, Chiba University, Chiba

来源：

Wang, H. (wanghualei@hotmail.com) | 1600年 / Institute of Electrical and Electronics Engineers Inc.卷 / 59期

基金：

日本学术振兴会;

关键词：

Bandpass filters - Acoustic surface wave filters - Capacitance - Passive filters - Resonators;

D O I：

10.1109/TUFFC.2012.2523

中图分类号：

学科分类号：

摘要：

This paper describes the design of RF SAW/BAW filters with constant group delay. The band-pass LC filter is designed based on the traditional Bessel filter design. Then, LC resonators in the filter are replaced by SAW/BAW resonators with finite capacitance ratio γ. Finite γ generates passband ripples in the group delay. However, it is shown the ripples can be suppressed by optimal design of the SAW/BAW resonators. Norton's first transform is also applied to the designed filter to reduce variation of resonator shunt capacitances. Finally, extremely flat group delay with deviation of 4 ns over the frequency range of ±20 MHz at the center frequency of 1 GHz is theoretically demonstrated. © 2012 IEEE.

引用

页码：2813 / 2817

页数：4

共 5 条

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