Coupling mode-adjustable filter

Abstract

The invention discloses a coupling mode-adjustable filter. According to the technical schemes of the invention, the coupling mode-adjustable filter comprises a cavity and a cover plate; a plurality ofresonance columns are arranged in the cavity; an input joint and an output joint are arranged outside the cavity; the input joint is connected with the resonance columns through an input copper sheet; the output joint is connected with the resonance columns through an output copper sheet; the cover plate is a PCB cover plate; a metalized via hole channel tuning screw surface is arranged on the back surface of the PCB cover plate; the back surface of the PCB cover plate is also provided with a main circuit corresponding to the position between the input copper sheet and the output copper sheet; the front surface of the PCB cover plate is provided with a metalized via hole channel ground plane; the metalized via hole channel ground plane comprises two welding holes arranged on the metalizedvia hole channel tuning screw surface; and a copper-attached surface passing through the main circuit is arranged between the two welding holes in a penetrating manner. The coupling mode-adjustable filter provided by the technical schemes provided by the invention, the purpose of randomly changing a capacitor and an inductor is realized. The filter has the advantages of convenience in processing,low cost, simplicity in implementation, easiness in control and the like.

Description

technical field [0001] The invention relates to the technical field of filters, in particular to a filter with an adjustable coupling mode. Background technique [0002] In the design of conventional filters, duplexers, and multiplexers, because customers have strict requirements on product appearance and require products with different indicators to share the same appearance size, that is, the common series often mentioned in the industry, in the design process due to Different location requirements for external suppression will lead to different structural requirements for capacitance or inductance. In general design, metal filters are generally realized by using a metal cavity and a metal cover. However, it is inconvenient to operate in the actual operation process. This is because the design requirements of each filter are different, and different cavity cover plates will be used to meet customer specifications. The same series of products may have different cavity cover...

AI Technical Summary

Problems solved by technology

[0005] Compared with the prior art, the present invention has the following advantages. This solution solves the problem of high cost due to the need to use flange resonant columns in the design of filters, duplexers, and combiners, and at the same time saves the processing of cover plates It realizes the purpose of arbitrary exchange of capacitance and inductance, and has the advantages of convenient processing, low cost, relatively simple implementation, and easy control.

Images