A Nodal Loaded Coaxial Cavity Harmonic Suppression Filter

Abstract

The invention discloses a stub loading coaxial chamber harmonic inhibition filter. The stub loading coaxial cavity harmonic inhibition filter comprises a metal chamber, wherein the metal chamber is internally provided with a first coaxial resonance chamber, a second coaxial resonance chamber and a third coaxial resonance chamber which are linearly arranged and are sequentially communicated, two sides of the metal chamber are equipped with a first input output port and a second input output port, coupling resonance grooves are arranged between every two coaxial resonance chambers, the first coaxial resonance chamber is internally provided with a first resonance metal column and a first metal loading stub, the second coaxial resonance chamber is internally provided with a second resonance metal column, the third coaxial resonance chamber is internally provided with a third resonance metal column and a second metal loading stub, the first input output port and the second input output portare coaxial feed wires, an inner conductor of the first input output port horizontally extends to the first resonance column, and an inner conductor of the second input output port horizontally extends to the third resonance column. The stub loading coaxial chamber harmonic inhibition filter is advantaged in that excellent filtering characteristics and out-band harmonic inhibition characteristicsare realized.

Description

technical field [0001] The invention relates to the technical field of a coaxial cavity filter, in particular to a harmonic suppression filter for a coaxial cavity loaded with branches. Background technique [0002] Today, microwave technology has developed rapidly. Among them, the filter, as a commonly used and practical frequency selection device, has received more and more attention. Microwave filter is an indispensable device at the transmitting end and receiving end of modern communication systems. It plays a role in frequency selection of signals, selects useful signals to pass through, and filters out useless signals. The resonant circuit is a relatively common circuit in the actual circuit design process, and the resonant circuit can usually be divided into a concentrated parameter circuit and a distributed parameter circuit. A microwave resonant circuit is a circuit that can be used in the microwave band. The resonance point in the lumped parameter circuit can on...

AI Technical Summary

Problems solved by technology

In 1964, H.J.RIBLBT applied for a patent and proposed to suppress the parasitic passband by changing the width of cascaded rectangular cavity resonators. Although H.J.RIBLBT did not give a good suppression effect diagram, his idea inspired subsequent researchers a lot

Images