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采用均匀椭圆波导内部横向放置金属膜片并在纵向进行周期加载的结构,设计了一款毫米波椭圆波导带通滤波器,所加载的膜片具有圆形内孔,使用电磁仿真软件HFSS分析了加载周期和内部圆孔半径对滤波特性的影响,获得59~65GHz上小于0.2dB的通带插入损耗,以及最大值达到38dB的阻带衰减特性,调整这两个关键尺寸还可以得到更宽的通带或更大的阻带衰减。该滤波器结构简单,可用于毫米波卫星通信及雷达的主馈线系统中。
Using a structure of horizontal elliptical waveguides placed transversely and carrying out periodic loading in the longitudinal direction, a millimeter-wave elliptic waveguide band-pass filter is designed. The loaded diaphragm has circular bores. The electromagnetic simulation software HFSS was used to analyze Loading period and the radius of the inner circular hole on the filtering characteristics of the gain of 59 ~ 65GHz on the pass band insertion loss of less than 0.2dB, and the maximum 38dB stop-band attenuation characteristics of these two key dimensions can also be adjusted wider Passband or larger stopband attenuation. The filter structure is simple, can be used for the millimeter-wave satellite communications and radar feeder system.