RF Cavity filter is a microwave filter with resonant cavity structure.  .  A cavity can be equivalent to the parallel capacitance of the inductor, so as to form a resonant stage to realize the microwave filter function: compared with other properties of the microwave filter, the cavity filter has a solid structure, stable and reliable performance, smaller volume, moderate Q value, the high-end parasitic passband is far I can, and its heat dissipation is good.  Therefore, the cavity filter is widely used in communication base stations.  

As far as the production is concerned, the performance of cavity filter is closely related to the performance of microwave circuit which its structure participates in, and its assembly is one of the important links in its production process.  High quality thread assembly is the key to produce high performance cavity filter.