基于信号干扰理论的差分带通滤波器
发布时间：2018-08-15 18:03
【摘要】：基于信号干扰理论,提出了一种差分宽带带通滤波器结构。由于该滤波器结构具有互补对称性,使该滤波器在差模激励时表现为带通滤波器,在共模激励时表现为带阻滤波器。另外,共模激励时,输入/输出端口之间有两条电长度不同的传输路径,使得共模信号在整个通带范围内得到很好的抑制。试验结果表明:差模通带中心频率f0为7.85GHz;最大回波损耗低于-25dB;3dB相对带宽为61%(5.5~10.2GHz);通带内插入损耗最小可达0.2dB。在差模通带内,共模抑制最小可达-20dB,其中-20dB抑制共模阻带带宽可覆盖5.5~10.2GHz,实测结果与仿真结果吻合。
[Abstract]:Based on the theory of signal interference, a differential wideband bandpass filter structure is proposed. Due to the complementary symmetry of the filter structure, the filter behaves as a band-pass filter under differential mode excitation and as a band-stop filter under common-mode excitation. In addition, when common-mode excitation, there are two transmission paths with different electrical lengths between the input and output ports, so that the common-mode signals are well suppressed in the whole passband range. The experimental results show that the center frequency f _ 0 is 7.85 GHz, the maximum return loss is less than -25 dB ~ 3 dB relative bandwidth is 61% (5.5~10.2GHz), and the minimum insertion loss in pass band is 0.2 dB. In the differential mode passband, the minimum common mode suppression can reach -20dB, in which -20dB suppression common-mode stopband bandwidth can cover 5.5g / 10.2GHz. The measured results are in good agreement with the simulation results.
【作者单位】： 上海海事大学信息工程学院;
【基金】：国家自然科学基金项目(61131002)
【分类号】：TN713.5
，
本文编号：2184991
[Abstract]:Based on the theory of signal interference, a differential wideband bandpass filter structure is proposed. Due to the complementary symmetry of the filter structure, the filter behaves as a band-pass filter under differential mode excitation and as a band-stop filter under common-mode excitation. In addition, when common-mode excitation, there are two transmission paths with different electrical lengths between the input and output ports, so that the common-mode signals are well suppressed in the whole passband range. The experimental results show that the center frequency f _ 0 is 7.85 GHz, the maximum return loss is less than -25 dB ~ 3 dB relative bandwidth is 61% (5.5~10.2GHz), and the minimum insertion loss in pass band is 0.2 dB. In the differential mode passband, the minimum common mode suppression can reach -20dB, in which -20dB suppression common-mode stopband bandwidth can cover 5.5g / 10.2GHz. The measured results are in good agreement with the simulation results.
【作者单位】： 上海海事大学信息工程学院;
【基金】：国家自然科学基金项目(61131002)
【分类号】：TN713.5
，
本文编号：2184991
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