阅读说明：本技术 一种基于管状滤波器结构的全可调带通滤波器 (Full-adjustable band-pass filter based on tubular filter structure ) 是由 张忠海 何云 韩旭 张�浩 胡随 赵越凯 于 2021-07-21 设计创作，主要内容包括：本发明公开了一种基于管状滤波器结构的全可调带通滤波器,属于微波技术领域,包括介质基板,四个π型谐振器,耦合电容。每个π型谐振器由阶跃阻抗线和调谐电容组成,每两个π型谐振器通过耦合电容连接,通过调节耦合电容和调谐电容的容值,实现带宽和频率同时独立可调。本发明基于管状滤波器结构,用微带线等效集总电感,具有通带插损小,宽阻带,调谐范围广的特点。(The invention discloses a full-tunable band-pass filter based on a tubular filter structure, which belongs to the technical field of microwaves. Each pi-type resonator is composed of a step impedance line and a tuning capacitor, every two pi-type resonators are connected through a coupling capacitor, and the bandwidth and the frequency are simultaneously and independently adjustable by adjusting the capacitance values of the coupling capacitor and the tuning capacitor. The invention is based on the tubular filter structure, uses microstrip line equivalent lumped inductance, and has the characteristics of small pass band insertion loss, wide stop band and wide tuning range.)