【摘要】 为了得到质量小、品质因数(Q)值高和低温漂系数低的小型双频带通滤波器,提出了一种基于单块小型介质滤波器的设计方案。该滤波器由介质腔体和矩形介质谐振器组合而成,谐振器和腔体由同种材料构成,腔体内部不需要其他固定谐振器的措施,腔体外表面镀上一层金属银。通过用限元模拟软件法对滤波器结构进行仿真优化,得到滤波器的两个中心频率分别为3.18GHz和3.78GHz,两个频带的3dB带宽分别为60 MHz和23 MHz,在中心频率处回波损耗均低于-30dB。更多还原

【Abstract】 A new type of dual frequency dielectric band-pass filter is proposed for achieving light weight,higher Qvalue and low temperature drift coefficients.The filter consists of dielectric cavity and dielectric resonators which are made of the same material.There’s no need of measures to fix the resonators in the cavity and the surface of the cavity is coated with a layer of silver.The two central frequencies of the proposed filter are 3.18 GHz and 3.78 GHz respectively,and 3dB bandwidths are 60 MHz and 23 MHz respectively,and the return loss at the center frequency is less than-30 dB.更多还原