Microwave low-pass band-pass filter circuit - has several longitudinal and lateral branches and has parallel and series resonant circuits

摘要

A low pass or bandpass filter consists of a number of longitudinal branches which have lateral branches between them. The longitudinal branches contain one or more parallel resonant circuits, in which when designed as a low pass filter the lateral branches consist of a series resonant circuit (Pk), and when designed as a band-pass each lateral branch consists of a pair of series resonant circuits. The filter circuit is intended especially for use in a microwave network with very small insertion loss.