一种椭圆函数微带低通滤波器的设计与实现

为克服传统微带低通滤波器结构尺寸大和过渡带衰减慢的缺点,基于椭圆函数低通滤波器原型,设计了一款结构紧凑、插损小、过渡带陡峭的高低阻抗线微带低通滤波器。给出了该滤波器结构尺寸的计算公式,并通过仿真软件ADS和HFSS对其进行了仿真优化,采用微波材料板制作出滤波器实物并进行了测试验证,实测结果与仿真结果具有较好的一致性,且验证了该设计方案的可行性。

Design and Implementation of an Elliptic Microstrip Low Pass Filter

A compact low insertion loss and sharp transition band stepped impedance microstrip low-pass filter is designed based on elliptic function low-pass filter prototype to overcome the larger size and the slower transition band attenuation for the traditional microstrip low-pass filter.The size of the filter structure is calculated by some formulas and is simulated and optimized by simulation software ADS and HFSS.The final filter has been fabricated and measured.The measured results are in good agreement with the simulated ones.It verifies the feasibility of the design scheme.