Cavity body device and coupling structure of resonant channel and connecting port thereof

Abstract

The invention discloses a coupling structure of a resonant channel and a connecting port. The resonant channel and the connecting port are arranged in a cavity body; a resonant column of the resonant channel near the connecting port realizes signal coupling with the connecting port; the resonant column is provided with a radial embedded hole groove along a column body of the resonant column; and a connecting conductor of the connecting port is arranged into the hole groove. The coupling structure provided by the invention is suitable for cavity body devices such as filters, duplexers, combiners, feeders and the like. The coupling structure has the obvious characteristics and effects of simplicity, easy realization, wide realizable port bandwidth, low requirements for assembly precision and processing precision, suitability for large-batch production and wide application range and can be used for designing various cavity body devices.

Description

【Technical field】 [0001] The invention relates to a cavity device, in particular to a resonant channel connection port coaxial coupling structure applied in the cavity device. 【Background technique】 [0002] Cavity devices generally have a resonant channel composed of several resonant columns and tuning screws, which are passive products. Their specific applications in the field of mobile communications mainly include the following products: filters, duplexers, feeders, combiners, etc. . Each particular application has its specific and known use. For example, filters are mainly used to filter out interference signals in the communication process, while ensuring that the required signals pass through with minimum loss. The cavity filter connected by coaxial cable has a series of advantages such as high Q value, low loss, high power, low passive intermodulation and simple debugging, which makes it widely used in the field of modern mobile communication. [0003] With the de...

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Problems solved by technology

For coaxial connection cavity devices with wide passband bandwidth, the above design method can only thicken the silver-plated wires, or replace the silver-plated wires with metal sheets, raise the silver-plated wires or metal sheets and weld them on the resonant column However, thickening the silver-plated wire or using a metal sheet will make it difficult to bend the silver-plated wire or metal sheet, and will also make the product very sensitive during the assembly process, which is not convenient for mass production; In terms of welding height, the height that can be raised can only be limited within the height range of the resonant column, but even if the welding height is raised to the top of the resonant column, the port bandwidth is not enough on some cavity devices, and at the same time This may also reduce the power handling of such cavity devices

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