ABSTRACT In this paper, a surface-mounted dielectric resonator-based balanced bandpass filter is proposed. By utilizing the TE01δ mode as a dominant mode of the cylindrical dielectric resonator, it can be excited in differential mode to achieve good common-mode suppression in differential filter passband. To validate the design idea, a second-order balanced narrowband bandpass filter with center frequency at 5.53 GHz has been designed, fabricated, and measured. The design parameters of the proposed filter are: insertion loss 0.2, 3 dB Bandwidth (BW) 67.1 MHz, and return loss 23 dB, and common-mode separation is more than 30 dB. There is good agreement between the simulated and measured results.

中文翻译：

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使用 TE01δ 模式介质谐振器的平衡带通滤波器

摘要 在本文中，提出了一种基于表面贴装介质谐振器的平衡带通滤波器。利用TE01δ模作为圆柱介质谐振器的主模，可以在差模下激励，在差动滤波器通带内实现良好的共模抑制。为了验证设计思想，我们设计、制造并测量了中心频率为 5.53 GHz 的二阶平衡窄带带通滤波器。所提出滤波器的设计参数为：插入损耗0.2，3 dB带宽（BW）67.1 MHz，回波损耗23 dB，共模分离度大于30 dB。模拟结果和测量结果之间有很好的一致性。