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本文阐述一种能与微波集成电路结合使用的新型介质谐振器带通滤波器。这种滤波器是目前能用于微波集成电路的性能最佳的一种窄带滤波器。本文对这种滤波器作了理论分析;并导出了有关滤波器设计的主要公式;给出了一至四谐振器带通滤波器的实测性能。例如:一个相对带宽为 0.2％的 5cm三谐振器滤波器,其带内插损为 0.8dB左右,带外衰减大于50dB,30dB与 3dB的带宽比约为 3.3。
This article describes a new dielectric resonator bandpass filter that can be used with microwave integrated circuits. This filter is currently the best performance of a microwave integrated circuit narrowband filter. In this paper, the theoretical analysis of this filter is made, and the main formulas of the filter design are deduced. The measured performance of one-to-four resonator band-pass filter is given. For example, a 5cm tri-resonator filter with a relative bandwidth of 0.2% has an in-band insertion loss of about 0.8dB and an out-of-band attenuation greater than 50dB with a 30dB to 3dB bandwidth ratio of about 3.3.