电子学报 ›› 2017, Vol. 45 ›› Issue (8): 1964-1969.DOI: 10.3969/j.issn.0372-2112.2017.08.022

• 学术论文 • 上一篇    下一篇

压电换能器电调介质滤波器的设计与实现

曹良足1,2, 殷丽霞2   

  1. 1. 南京理工大学电光学院, 江苏南京 210094;
    2. 景德镇陶瓷大学机电学院, 江西景德镇 333403
  • 收稿日期:2016-05-16 修回日期:2016-08-11 出版日期:2017-08-25 发布日期:2017-08-25
  • 作者简介:曹良足,男,1966年9月出生,1987年和2008年分别获景德镇陶瓷大学的工学学士和工程硕士学位,曾在企业从事技术工作10多年,现为景德镇陶瓷大学的教授,主要从事微波和毫米波材料和器件的研究工作.E-mail:clz4233@aliyun.com
  • 基金资助:
    江西省自然科学基金(No.20151BAB207014)

The Implementation and Design of Piezoelectric Transducer-Tuned Dielectric Filter

CAO Liang-zu1,2, YIN Li-xia2   

  1. 1. School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China;
    2. School of Mechanical and Electrical Engineering, Jingdezhen Ceramic Institute, Jingdezhen, Jiangxi 333403, China
  • Received:2016-05-16 Revised:2016-08-11 Online:2017-08-25 Published:2017-08-25

摘要: 为了解决变容管电调窄带滤波器的插入损耗大和承受功率小的问题,研究了用压电换能器作电调元件的电调介质滤波器.分析了压电换能器调谐介质谐振器的机理,讨论了耦合系数和外部Q值的控制方法,仿真结果表明耦合系数和外部Q值随调谐频率的变化较小.采用HFSS软件设计和优化了两级电调介质滤波器的结构,并用高Q值的介质谐振器制作了两级电调介质滤波器.根据ANSYS软件的分析结果,提出了提高电调率的有效措施.当控制电压为0~10V时,滤波器的中心频率调谐范围为4.155~4.205GHz,3dB带宽为37~40MHz.

关键词: 压电换能器, TE01&delta, 模介质谐振器, 介质滤波器, 电调带通滤波器

Abstract: In order to solve the problem of low power capacity and high insertion loss existing in varactor-tuned narrow filters,a tunable dielectric filter using piezoelectric transducers as tuning elements has been developed.The tuning of a dielectric resonator tuned by a piezoelectric transducer was analyzed,the control of coupling coefficient and external quality factor was discussed.The simulation results show that the coupling coefficient and external quality factor hardly varies with the tuning frequencies.A two-pole electrically tunable dielectric filter is designed and optimized by using HFSS software.The proposed filter was made of high Q-value dielectric resonators.Based on the results of ANSYS analysis,the effective measure of improving the tunability is suggested.The measured results show that center frequencies vary from 4.155GHz to 4.205GHz when bias voltages are applied from 0V to 50V with 3dB bandwidth of 37~40MHz.

Key words: piezoelectric transducer, TE01 δ mode dielectric resonator, dielectric filter, electrically tunable bandpass filter

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