Multimode filter composed of single-mode surface acoustic wave/bulk acoustic wave resonators
Multimode filter composed of single-mode surface acoustic wave/bulk acoustic wave resonators
复制标题
由单模表面声波/体声波谐振器组成的多模滤波器
DOI：
10.7567/jjap.56.07jd10
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发表时间：
2017-07-01
影响因子：
1.5
通讯作者：
Hashimoto, Ken-ya
中科院分区：
文献类型：
--
作者：
Huang, Yulin;Bao, Jingfu;Hashimoto, Ken-ya
本文讨论了利用射频声表面波/体声波技术实现由多个单模谐振器组成的多模滤波器的可能性。首先，给出了滤波器的工作原理和设计原则。它示出了优良的滤波器特性是通过组合多个单模谐振器具有相同的电容比，只要它们的谐振频率和箝位电容设置适当。接下来，研究巴伦性能的影响。结果表明，总的滤波器的性能显着下降的巴伦不完善，如共模抑制。然后，提出了两种提高共模抑制的电路，并证明了它们的有效性。(C)2017日本应用物理学会
This paper discusses the possibility of realizing multimode filters composed of multiple single-mode resonators by using radio frequency surface and bulk acoustic wave (SAW/BAW) technologies. First, the filter operation and design principle are given. It is shown that excellent filter characteristics are achievable by combining multiple single-mode resonators with identical capacitance ratios provided that their resonance frequencies and clamped capacitances are set properly. Next, the effect of balun performance is investigated. It is shown that the total filter performance is significantly degraded by balun imperfections such as the common-mode rejection. Then, two circuits are proposed to improve the common-mode rejection, and their effectiveness is demonstrated. (C) 2017 The Japan Society of Applied Physics