一、引言无源滤波器结构中采用有源器件比传统的超高频滤波器具有一系列的优点,如:可以补偿给定通带内的损耗,提高了选择性,可实现滤波器参数的电调谐,扩大了功能范围等。有源器件可采用场效应晶体管,崩越二极管,耿氏二极管,PIN二极管,肖特基二极管,变容二极管等,可实现用于分米波段 I. Introduction Passive filter structure using active components than the traditional UHF filter has a series of advantages, such as: you can compensate for the loss within a given passband to improve the selectivity of the filter parameters can achieve the electricity Tuning, expanding the scope of functions. Active devices can be field-effect transistors, collapsing diodes, Gunn diodes, PIN diodes, Schottky diodes, varactors, etc., can be achieved for the decimeter band