基于环形谐振器的平衡式带通滤波器 |
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引用本文: | 张诚,施金,杜明珠,林垄龙,徐凯. 基于环形谐振器的平衡式带通滤波器[J]. 电波科学学报, 2016, 31(6): 1046-1052. DOI: 10.13443/j.cjors.2016092301 |
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作者姓名: | 张诚 施金 杜明珠 林垄龙 徐凯 |
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作者单位: | 1.南通大学电子信息学院, 南通 226019 |
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基金项目: | 国家自然科学基金(61471209),江苏省研究生科研创新项目(KYLX16_0970),江苏省六大人才高峰(2013-XXRJ-010) |
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摘 要: | 提出了一种基于多模环形谐振器实现的平衡式带通滤波器, 其主要由加载了电阻和短路枝节的环形谐振器和两对平衡端口构成.所提出的滤波器能够以单个谐振器获得差模的双模响应, 并且具有结构简单, 共模抑制高, 带宽可进行有限控制(4% ~ 9%)的优点.为验证理论预期的可实现性, 在RO4003C基板上设计了一个工作在1.87 GHz的平衡式带通滤波器.实验结果表明该滤波器的20-dB阻抗匹配带宽为8.9%, 中心频率处的插入损耗为0.86 dB, 在1 ~ 3 GHz频率范围内的共模抑制大于30 dB.
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关 键 词: | 环形谐振器 平衡式带通滤波器 电阻加载 短路枝节加载 共模抑制 |
收稿时间: | 2016-09-23 |
Balanced bandpass filter using ring resonator |
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Affiliation: | 1.Department of Electronic and Information Engineering, Nantong University, Nantong 226019, China2.Nanjing University, Nanjing 210033, China |
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Abstract: | A balanced bandpass filter (BPF) using multi-mode ring resonator is proposed,which is configured by two pairs of balanced ports and a ring resonator with loaded resistors and shorted stubs.The proposed filter can get dual-mode differential-mode response with single resonator,and it has the advantages of simple structure,high common-mode suppression and finite controllability of bandwidth (4%-9%).A prototype at 1.87 GHz is designed on RO4003C substrate to verify the theoretical prediction.Measured results show that the 20-dB impedance matching bandwidth is 8.9%,the insertion loss at the center frequency is 0.86 dB and the common-mode suppression is greater than 30 dB from 1 GHz to 3 GHz. |
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Keywords: | ring resonator balanced bandpass filter resistor loaded loaded shorted stub common-mode suppression |
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