A Technique to Suppress Harmonic Outputs in Coaxial Cavity Filters at the Excitation Port

Research on the Novel Double-Layer Multi-cavity Filter

“…At present, all the cavity filter for the civil mobile communication base station is a single layer structure. There are many research papers on multi-cavity filter [3,4] and the main research context includes those： 1) How to achieve the magnetic coupling or electric coupling through the air openings or probes between sideby-side resonators.…”