Coupling device, cavity filter and communication radio frequency equipment

Abstract

The invention discloses a coupling device, a cavity filter and communication radio frequency equipment. The coupling device comprises a signal transmission main rod and a coupling body which is used for acquiring a signal of the signal transmission main rod, wherein the coupling body is connected to a printed circuit board in parallel to the signal transmission main rod. The coupling device is characterized in that the coupling body comprises a coupling outer conductor which is connected to the printed circuit board, and a coupling inner conductor which is arranged in the coupling outer conductor, wherein one end of the coupling inner conductor is positioned in a through hole of the printed circuit board; the coupling inner conductor comprises a threaded part and is in threaded fit with the coupling outer conductor through the threaded part; an elastic fixing block is arranged between the coupling outer conductor and the coupling inner conductor; and the coupling inner conductor is in interference fit with the elastic fixing block and is fixed in the through hole of the coupling outer conductor. The coupling device can be conveniently installed, has limiting and self-locking functions, is free of short-circuit, and is high in safety.

Description

technical field [0001] The invention relates to a coupling device, a cavity filter and communication radio frequency equipment. Background technique [0002] As a frequency selective device, cavity filters are widely used in the field of communication, especially in the field of radio frequency communication. In the base station, the cavity filter is used to select the communication signal and filter out the clutter or interference signal outside the frequency of the communication signal. In a cavity filter, it is often necessary to divide one microwave power into several circuits in proportion. The module that realizes this function is called a power distribution module, that is, a coupling module. [0003] The coupling module is a four-port module with directional transmission characteristics. It distributes the power of the microwave signal according to a certain ratio. It can be used for signal isolation, separation and mixing, and power signal sampling for power monito...

AI Technical Summary

Problems solved by technology

[0005] 1. The adjustment mechanism is not an integral part. Due to the small size of these components, it is easy for the debugger to fall off the components and fall into the cavity during the assembly process, resulting in waste of time and inconvenience in production;

[0006] 2. Unlimited position function, when the debugging components enter a lot and are very close to the signal transmission body, it may cause a short circuit

[0007] 3. There is no self-locking function, and the existing coupling device needs to be fixed by dispensing glue, and there are certain safety hazards in the process of high and low temperature glue

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