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基于方开环谐振器的双陷波超宽带滤波器
引用本文:王斌,荆麟,黄文.基于方开环谐振器的双陷波超宽带滤波器[J].压电与声光,2017,39(3):452-455.
作者姓名:王斌  荆麟  黄文
作者单位:重庆邮电大学 光电工程学院,重庆 400065
基金项目:国家自然科学基金资助项目(61401054)
摘    要:针对超宽带系统易受窄带信号干扰的问题,设计了一种可以抑制无线局域网络(WLAN)和卫星通信信号干扰的双陷波超宽带带通滤波器。该滤波器的主要谐振结构由T型枝节加载的多模谐振器组成,改进的T型枝节增加了两个传输零点,同时减小了滤波器尺寸;通过耦合方开环谐振器,实现了两个陷波特性,调节谐振器尺寸,可以得到所需的陷波频率。测试结果表明,该滤波器的尺寸仅16.7mm×8.5mm,中心频率为6.9GHz,通带为3.0~10.8GHz,陷波中心频率在5.8GHz和8.04GHz,衰减最低点分别为-27dB和-18dB,仿真与测量结果有较好的一致性。

关 键 词:滤波器  超宽带  双陷波  方开环谐振器  小型化

Ultra-Wideband Filter With Dual Notch Bands Based on Open-Square-Loop Resonators
WANG Bin,JING Lin,HUANG Wen.Ultra-Wideband Filter With Dual Notch Bands Based on Open-Square-Loop Resonators[J].Piezoelectrics & Acoustooptics,2017,39(3):452-455.
Authors:WANG Bin  JING Lin  HUANG Wen
Abstract:As the ultra-wideband (UWB) system is easy to be interfered by narrow band signals, this paper proposed an UWB bandpass filter for the suppression of interference from WLAN and satellite communication signals. The main resonator structure consisted of the multi mode resonator (MMR) loaded with a T shape stub. The improved T shape stub increased two transmission zeros, and reduced the filter size. Two band notched characteristics were achieved by coupling open square loop resonators. The desired notch frequencies could be obtained by adjusting the size of resonators. The measured results showed that the filter size was just 16.7 mm×8.5 mm, and the center frequency is 6.9 GHz with the passband of 3.0 to 10.8 GHz. Two notch bands centered at 5.8 GHz and 8.04 GHz with the lowest attenuation point at -27 dB and -18 dB respectively. The measured results are in sound agreement with simulation results.
Keywords:filter  ultra-wideband  dual notched bands  open-square-loop resonators  miniaturization
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