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2.4GHz波段微带发夹型带通滤波器设计与馈电研究
引用本文:夏祖学,杨羿华,梁尧.2.4GHz波段微带发夹型带通滤波器设计与馈电研究[J].西南科技大学学报,2013(4):81-84.
作者姓名:夏祖学  杨羿华  梁尧
作者单位:[1]西南科技大学信息工程学院,四川绵阳621010 [2]东莞华科电子有限公司,广东东莞523770
摘    要:介绍了微带发夹型带通滤波器的基本原理,基于ADS软件设计了微带发夹型带通滤波器,实测与仿真结果吻合较好,中心频率为2.4GHz,相对带宽大于5%,适用于短距离无线通信频段。研究了微带发夹型带通滤波器直接馈电的3种形式对S参数仿真结果的影响,均匀阻抗馈电、高低阻抗馈电、阻抗渐变馈电3种形式的馈电的仿真结果都满足设计要求,采用高低阻抗、渐变阻抗馈电的S参数仿真结果大体一致,略优于均匀阻抗馈电。设计的微带发卡带通滤波器具有设计简单、结构紧凑、插损较小的优点,可用于短距离无线通信。

关 键 词:发夹型微带带通滤波器  直接馈电  耦合系数

2.4 GHz band Hairpin Microstrip Bandpass Filter Design and Feed Research
XIAZu-xue YANGYi-hua LIANGYao.2.4 GHz band Hairpin Microstrip Bandpass Filter Design and Feed Research[J].Journal of Southwest University of Science and Technology,2013(4):81-84.
Authors:XIAZu-xue YANGYi-hua LIANGYao
Institution:XIAZu-xue YANGYi-hua LIANGYao (1. School of Information Engineering, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China ; 2. Dongguan 523770, Dongguan Huake Electronics co. , LTD, Guangdong , China)
Abstract:The fundmental of hairpin microstrip bandpass filter was introduced in this paper, then the microstrip bandpass filter had been designed by ADS. The simulated and measured results have a good agreement, the bandpass filter' s center frequency is 2.4 GHz, relative bandwidth is greater than 5 percent, it is suitable for short distance wireless communication frequency band. Besides, the effects of three kinds of forms of the microstrip hairpin type bandpass filter' s direct feeding have been researched mainly on the simulation results of S parameters, the three kind of bandpass filters of uniform impedance feed, high- and low-impedance feed, impedance gradient feed are designed and simulated, which all meet the design requirement. Among all of these, the simulated results of high- and lowimpedance feed, impedance gradient feed are the same, is slightly better than the uniform impedance feed. Generally speaking, the fabricated mierostrip hairpin bandpass filter is also simple in design and compact in structure, has lower insertion, so it has higher practical value, and the design of the feed structures has certain engineering significance.
Keywords:Hairpin microstrip bandpass filter  Direct feeding  Coupling coefficient
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