基于缺陷地结构的共形四分之一波长短截线带通滤波器
PDF下载 (11320)李荣正,华昌洲*.基于缺陷地结构的共形四分之一波长短截线带通滤波器[J].宁波大学学报(理工版),2018,31(3):1-6.DOI:
LI Rong-zheng,HUA Chang-zhou*.Conformal bandpass filter with g/4 short-circuited stubs using defected ground structure[J].Journal of Ningbo University(Natural Science & Engineering Edition),2018,31(3):1-6.DOI:
| Title: | Conformal bandpass filter with g/4 short-circuited stubs using defected ground structure |
| 作者: | 李荣正, 华昌洲* |
| Author(s): | LI Rong-zheng, HUA Chang-zhou* |
| 关键词: | 缺陷地; 高特性阻抗; 四分之一波长短路短截线; 带通滤波器 |
| Keywords: | defected ground structure (DGS); high characteristic impedance; g/4 short-circuited stubs; bandpass filters |
| 分类号: | TN928 |
| 文献标识码: | A |
| 摘要: | 在原有的四分之一波长短路短截线带通滤波器的基础上加入缺陷地结构, 可以有效的解决在设计中等带宽或窄带带通滤波器的时候, 四分之一波长短路短截线太宽而无法实现的问题. 此四分之一波长短路短截线带通滤波器在较高的终端阻抗下设计, 较高的终端阻抗使阻抗较低的四分之一波长短路短截线宽度减小. 在滤波器的输入输出端用两级四分之一波长阻抗变换器把较高的终端阻抗匹配到50Ω, 然后用缺陷地结构增大滤波器中高阻抗线的宽度以便于物理实现. 该种平面结构滤波器可以很好地适用于多种介质基板且易于和材料表面共形. 最后, 一个中心频率为20GHz的13节四分之一波长短路短截线滤波器被设计、加工和测量, 同时也测试了该滤波器的灵活性. 经过仿真和实测数据的对比, 证明了该种方法的有效性. |
| Abstract: | A conformal bandpass filter with λg/4 short-circuited stubs using defected ground structure (DGS) is described in this paper, which effectively solves the problem that the width of λg/4 short-circuited stubs is too large to be realized in realizing medium or narrow bandpass filters. The filter is designed basing on high impedance termination to reduce the width of the low characteristic impedance lines, and then two sections of λg/4 impedance transformer are used at input and output of the filter to match to 50Ω system. DGS is applied to increase the width of the high characteristic impedance lines in the filter. This planar special filter can adopt a flexible dielectric-slab and is easy to conform to material surface. Finally, a 13 orders bandpass filter working at 20GHz is designed, fabricated, and measured. In addition, the flexibility of the filter is also tested. Experimental results and full wave simulated ones are compared and the proposed design method is verified. |
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| 备注/Memo: | 收稿日期: 2017?07?03. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/ 基金项目: 国家自然科学基金（61501274）; 浙江省重中之重学科开放基金（XKXL1504）; 宁波市自然科学基金（2016A610059, 2016A610087）. 第一作者: 李荣正（1989－）, 男, 河南濮阳人, 在读硕士研究生, 主要研究方向: 微波毫米波器件及电路. E-mail: li457324@163.com *通信作者: 华昌洲（1984－）, 男, 浙江杭州人, 副教授, 主要研究方向: 微波毫米波天线及电路. E-mail: huachangzhou@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
