基于方开环谐振器的双陷波超宽带滤波器  

Ultra-Wideband Filter With Dual Notch Bands Based on Open-Square-Loop Resonators

作　　者：王斌[1] 荆麟 黄文[1] 

机构地区：[1]重庆邮电大学光电工程学院,重庆400065

出　　处：《压电与声光》2017年第3期452-455,461,共5页Piezoelectrics & Acoustooptics

基　　金：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。As the ul t ra-wideband （UWB） system is easy to be inter fered by nar row-band signals, this paper pro-posed 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 im-proved T-shape stub increased two transmission zeros, and reduced the filter size. Two band-notched characteristicswere 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.

关 键 词：滤波器 超宽带 双陷波 方开环谐振器 小型化 

分 类 号：TN713[电子电信—电路与系统] TN015