从经典的多模谐振器出发,针对其插入损耗过大和阻带抑制较低的问题,提出了基于多模谐振器的超宽带带通滤波器新结构。通过奇偶模分析方法对其谐振特性和耦合特性进行了系统分析,利用ADS粗略仿真验证新结构的可行性,最后通过HFSS进行参...从经典的多模谐振器出发,针对其插入损耗过大和阻带抑制较低的问题,提出了基于多模谐振器的超宽带带通滤波器新结构。通过奇偶模分析方法对其谐振特性和耦合特性进行了系统分析,利用ADS粗略仿真验证新结构的可行性,最后通过HFSS进行参数优化,设计了一个中心频率6.5 GHz、相对带宽约为120%的超宽带带通滤波器,该滤波器整体性能良好,带外衰减十分陡峭,在11.5 GHz处达到45.5 d B,阻带宽度很宽,且具有插入损耗小、结构紧凑和尺寸小等优点。展开更多
This paper consolidates the activity of design and fabrication of 2.9 - 4.32 GHz, 4.3 - 6.42 GHz, and 6.4 - 8.4 GHz filter bank. Novel compact microstrip bandpass filters with stub-loaded multi-mode resonators are pro...This paper consolidates the activity of design and fabrication of 2.9 - 4.32 GHz, 4.3 - 6.42 GHz, and 6.4 - 8.4 GHz filter bank. Novel compact microstrip bandpass filters with stub-loaded multi-mode resonators are proposed. Simulated results indicate that all the filters exhibit insertion losses less than 1.5 dB with passband ripples of 1 dB and sharp attenuations of above 40 dB in their stopbands. The maximums of input and output VSWRs are 1.742 and 1.734, respectively. Due to fabrication error, the initial measured passbands show frequency shifts and insertion losses in upper passbands deteriorate seriously. After tuning of the filter bank, measured results imply that the input and output VSWRs are found lower than 2.135 and 2.187, and the insertion loss in 1 dB bandwidth is less than 2.52 dB. Filter bank has a sharp skirt and out-of-band rejection levels approaching to 40 dB in all desired stopbands except at the frequencies near 2f0.展开更多
提出了一种基于短开路耦合器加载的宽带带通滤波电路.该滤波电路通过在输入和输出端口之间,并连加载短路耦合微带谐振器和开路耦合微带谐振器实现5个传输极点和3个传输零点的带通选择特性.对所提出的短开路耦合谐振器进行了奇偶模理论分...提出了一种基于短开路耦合器加载的宽带带通滤波电路.该滤波电路通过在输入和输出端口之间,并连加载短路耦合微带谐振器和开路耦合微带谐振器实现5个传输极点和3个传输零点的带通选择特性.对所提出的短开路耦合谐振器进行了奇偶模理论分析,揭示了其传输零极点形成的物理机理.最后,对所提出的滤波电路进行了加工测试.测试结果表明,所提出的宽带滤波电路能够在2.0~4.2 GHz频率范围内实现3 d B带通传输,工作相对带宽为73%,仿真和实测结果吻合较好.展开更多
This paper presents a new Ultra-WideBand (UWB) BandPass Filter (BPF) using half-wavelength Stepped-Impedance Stub-Loaded Resonator (SISLR). Analytical equations derived by the even-odd mode analysis show the new filte...This paper presents a new Ultra-WideBand (UWB) BandPass Filter (BPF) using half-wavelength Stepped-Impedance Stub-Loaded Resonator (SISLR). Analytical equations derived by the even-odd mode analysis show the new filter has two tunable transmission zeros at both sides of the passband to provide a sharp rejection and seven transmission poles inside the passband to achieve U.S. UWB performance. For verification, a UWB BPF is designed, fabricated and measured. The measured results show that the fabricated filter has a -3 dB fractional bandwidth from 3.0 GHz to 10.9 GHz and its insertion loss less than 0.9 dB over the whole passband. Furthermore, the new filter exhibits a simple topology, sharp rejection, and deep stopband suppression.展开更多
本文提出了一种新型多模SRLR (square ring loaded resonators)结构,并基于该谐振结构设计了一款具有高共模噪声抑制的双通带超导平衡滤波器.此外,本文详细地给出了该谐振器的差共模谐振机理,拓扑结构,模拟仿真结果.基于上述分析,使用0....本文提出了一种新型多模SRLR (square ring loaded resonators)结构,并基于该谐振结构设计了一款具有高共模噪声抑制的双通带超导平衡滤波器.此外,本文详细地给出了该谐振器的差共模谐振机理,拓扑结构,模拟仿真结果.基于上述分析,使用0.5 mm厚度的氧化镁(MgO)基片上的钇钡铜氧(YBCO)高温超导薄膜设计制作一款四阶双通带平衡滤波器,该滤波器的两个通带的中心频率分别为2.2 GHz和3.5 GHz,带内的损耗分别为0.1 d B和0.12 dB,两个通带内的共模抑制分别为74.9 d B和67.4 dB.其测试曲线、模拟仿真曲线、理论计算具有良好的吻合度,验证了所提出滤波器的设计方法的正确性.展开更多
文摘采用加载谐振器结构,设计了一款在8 GHz处具有陷波特性的超宽带滤波器,有效地避免了X波段卫星通信系统(7.9~8.395 GHz)的连续波对超宽带通信系统的干扰。在三模谐振器的基础上加载中心加载谐振器,通过调整加载谐振器的参数对陷波频率进行调控,使得滤波器在超宽带范围内产生陷波。利用HFSS进行仿真后结果表明,该超宽带滤波器的通带在2.5~10.3 GHz,通带范围内插入损耗在0.9 d B左右,带外衰减十分陡峭。其陷波中心频率发生在8.19 GHz,在陷波频段(7.98~8.40 GHz)范围内最小插入损耗低于–7 d B,具有良好的抑制水平,整体性能表现优良。实际测试结果与仿真结果基本一致,性能指标能够达到设计要求。
文摘从经典的多模谐振器出发,针对其插入损耗过大和阻带抑制较低的问题,提出了基于多模谐振器的超宽带带通滤波器新结构。通过奇偶模分析方法对其谐振特性和耦合特性进行了系统分析,利用ADS粗略仿真验证新结构的可行性,最后通过HFSS进行参数优化,设计了一个中心频率6.5 GHz、相对带宽约为120%的超宽带带通滤波器,该滤波器整体性能良好,带外衰减十分陡峭,在11.5 GHz处达到45.5 d B,阻带宽度很宽,且具有插入损耗小、结构紧凑和尺寸小等优点。
文摘This paper consolidates the activity of design and fabrication of 2.9 - 4.32 GHz, 4.3 - 6.42 GHz, and 6.4 - 8.4 GHz filter bank. Novel compact microstrip bandpass filters with stub-loaded multi-mode resonators are proposed. Simulated results indicate that all the filters exhibit insertion losses less than 1.5 dB with passband ripples of 1 dB and sharp attenuations of above 40 dB in their stopbands. The maximums of input and output VSWRs are 1.742 and 1.734, respectively. Due to fabrication error, the initial measured passbands show frequency shifts and insertion losses in upper passbands deteriorate seriously. After tuning of the filter bank, measured results imply that the input and output VSWRs are found lower than 2.135 and 2.187, and the insertion loss in 1 dB bandwidth is less than 2.52 dB. Filter bank has a sharp skirt and out-of-band rejection levels approaching to 40 dB in all desired stopbands except at the frequencies near 2f0.
文摘提出了一种基于短开路耦合器加载的宽带带通滤波电路.该滤波电路通过在输入和输出端口之间,并连加载短路耦合微带谐振器和开路耦合微带谐振器实现5个传输极点和3个传输零点的带通选择特性.对所提出的短开路耦合谐振器进行了奇偶模理论分析,揭示了其传输零极点形成的物理机理.最后,对所提出的滤波电路进行了加工测试.测试结果表明,所提出的宽带滤波电路能够在2.0~4.2 GHz频率范围内实现3 d B带通传输,工作相对带宽为73%,仿真和实测结果吻合较好.
文摘This paper presents a new Ultra-WideBand (UWB) BandPass Filter (BPF) using half-wavelength Stepped-Impedance Stub-Loaded Resonator (SISLR). Analytical equations derived by the even-odd mode analysis show the new filter has two tunable transmission zeros at both sides of the passband to provide a sharp rejection and seven transmission poles inside the passband to achieve U.S. UWB performance. For verification, a UWB BPF is designed, fabricated and measured. The measured results show that the fabricated filter has a -3 dB fractional bandwidth from 3.0 GHz to 10.9 GHz and its insertion loss less than 0.9 dB over the whole passband. Furthermore, the new filter exhibits a simple topology, sharp rejection, and deep stopband suppression.
文摘本文提出了一种新型多模SRLR (square ring loaded resonators)结构,并基于该谐振结构设计了一款具有高共模噪声抑制的双通带超导平衡滤波器.此外,本文详细地给出了该谐振器的差共模谐振机理,拓扑结构,模拟仿真结果.基于上述分析,使用0.5 mm厚度的氧化镁(MgO)基片上的钇钡铜氧(YBCO)高温超导薄膜设计制作一款四阶双通带平衡滤波器,该滤波器的两个通带的中心频率分别为2.2 GHz和3.5 GHz,带内的损耗分别为0.1 d B和0.12 dB,两个通带内的共模抑制分别为74.9 d B和67.4 dB.其测试曲线、模拟仿真曲线、理论计算具有良好的吻合度,验证了所提出滤波器的设计方法的正确性.
