Miniaturized filter

Abstract

According to the miniaturized filter provided by the invention, the signal transmission is carried out by directly penetrating through the surface of the filter through the integrally formed resonance piece and welding, so that auxiliary transmission devices such as a connector, a connecting piece and a connecting rod are not needed; meanwhile, 180-degree (not limited to 180-degree) bending is carried out on the integrally-formed resonance piece, half of the space of the filter is saved, a signal input port and a signal output port are formed in the same plane, signal transmission becomes simple, and the follow-up assembling and welding process is simpler. Moreover, the sheet-shaped structure is processed, cut and bent to form the cavity shell, the separation ribs and the integrated resonance piece are arranged in the cavity, assembly is carried out, and laser welding forming is carried out, so that the side wall of the filter is very thin, and the weight is light; in conclusion, the filter has the advantages of being smaller in size, lighter in weight, fewer in material types, simpler in structure, more convenient to debug and the like.

Description

technical field [0001] The invention belongs to the technical field of filters, and in particular relates to a miniaturized filter. Background technique [0002] With the wide application and development of communication technology, the requirements for communication equipment are getting higher and higher. Therefore, the development of filters to be more miniaturized, lightweight and integrated has gradually become a future development trend. In the case of limited cavity size, the coaxial cavity filter cannot be made smaller and lighter in terms of volume and weight due to its own material and processing technology requirements. In the rapidly developing communication equipment, due to the increase in the number of transmission and reception channels of the equipment, more filters need to be equipped for the transmission and reception channels of the equipment. In order to reduce the space occupied by a large number of filters, the miniaturization of the filter is the curr...

AI Technical Summary

Problems solved by technology

With the continuous development of modern communication technology, there are higher and higher requirements for the miniaturization of components such as duplexers, combiners, and filters. The existing duplexers, combiners, and filters are large in size , heavy weight, many types of materials, complex assembly, high price, etc., are becoming more and more unsuitable; while ceramic dielectric filters have small size, easy assembly, good electrical performance index insertion loss, and high echo consistency of the same batch advantages, but the ceramic dielectric filter also has the following disadvantages: material selection is difficult; ceramic dielectric firing process is complex, and the yield is low; the consistency between batches is poor, such as phase, amplitude, etc.; remote suppression Poor performance, almost harmonics appear near the passband, which is not conducive to engineering applications

Therefore, there is an urgent need for a miniaturized filter to solve the problems of existing filters such as large size, heavy weight, many types of materials, complex assembly, and high price.

Images