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主要介绍了一种设计宽频带带通滤波器的新方法,即通过HFSS软件的本征模式求得悬置线交指滤波电路设计的初值,再经Designer软件建模优化,最终得到满足设计要求的滤波器电路。根据文中提供的设计方法,研制成功了通带分别为2～4GHz、4～8GHz、8～12GHz、12～18GHz的悬置线(SSS)带通滤波器,实测的滤波器响应曲线与仿真曲线吻合良好。该类滤波器电性能优良、成本低、体积小、易加工、易与微带电路集成,因而具有良好的应用前景。
This paper introduces a new method of designing a wideband band-pass filter. By means of the eigenmode of the HFSS software, the initial value of the design of the interdigital filter circuit of the suspension line is obtained, and then the software is modeled and optimized by the Designer software to finally meet the design requirements Required filter circuit. According to the design method provided in this paper, the SSS bandpass filters with passband of 2 ~ 4GHz, 4 ~ 8GHz, 8 ~ 12GHz and 12 ~ 18GHz are successfully developed. The measured filter response curves and simulation curves Good fit. Such filters have excellent electrical properties, low cost, small size, easy processing and easy integration with the microstrip circuit, which has good application prospects.