【摘要】 微波滤波器综合的出发点在于滤波函数的选择,滤波函数的性质决定了滤波器的响应。文中提出了一种广义的巴特沃思滤波函数,在保留其群时延上优势的同时,通过引入有限位置的传输零点,大大的改善巴特沃思函数的带外特性,使得其可以适应现代通信技术对微波滤波器的要求,在微波滤波器的实际设计中具有很好的应用价值。更多还原

【Abstract】 The choice of filtering functions is the base of the synthesis of microwave filer,and the response of filter is determined by the characteristics of filtering functions.In this paper,a general Butterworth filtering functions is presented,preserving the advantage of butterworth filtering functions at the group delay,and simultaneity ameliorate the characteristics out of the passband of butterworth filtering functions by introduce transmission zeros with finite positions,to make sure it could adapt the requests of modern communications technology.The research have good importance in the design of microwave filer.更多还原