Capacitive cross coupling flying bar and coaxial cavity resonator thereof

Abstract

The invention discloses a capacitive cross coupling flying bar and a coaxial cavity resonator thereof, and relates to a cavity filter in the microwave communication field. The coupling flying bar is of a centre-symmetrical strip sectional material structure, wherein, the center of the coupling flying bar is equipped with a cylindrical fine-adjusting coupling hole; two ends of the coupling flying bar are respectively equipped with a coupling disk with an annular surface; and two sides of the fine-adjusting coupling hole are respectively equipped with a cylindrical screw fastening hole. The capacitive cross coupling flying bar has the advantages that the flying bar is a new sectional material structural form and is made by cutting a sectional material, wherein, the utilization ratio of the material is high and the machining process is simple, thus facilitating large-scale production; the coupling surfaces of the flying bar are the annular surfaces parallel to the cylindrical surfaces of resonant columns, and the coupling area is large and the distance is consistent, which can realize strong cross coupling by increasing the coupling area in the case of slightly long distance and ensure that a high-power signal can smoothly pass; and coupling coefficients are finely adjusted by a fine-adjusting coupling screw, which solves the problem of offset of the coupling coefficients caused by machining and assembly accuracy and ensures debugging consistency.

Description

technical field [0001] The invention relates to a cavity filter in the field of microwave communication, in particular to a capacitive cross-coupling fly rod between non-adjacent cavity resonators and a coaxial cavity resonator thereof. Background technique [0002] As a passive filter, the cavity filter does not require a power supply, is not prone to interference, and has a wide range of applications, and is widely used in the field of mobile communications. In the field of mobile communication, the cavity filter is used to separate and combine different frequencies, select the required signal frequency, and suppress the unnecessary signal frequency. [0003] At present, in multi-mode remote radio frequency units and multi-system integrated access systems, cavity filters are generally used to select signals at the antenna end or base station end. In order to meet the requirements of system operators for higher and higher network quality, the requirements for cavity filter...

AI Technical Summary

Problems solved by technology

For the integrated flying rod, increasing the coupling plate will greatly increase the cost, generally by increasing the length of the rod; to reduce the distance between the rod and the resonant column to achieve a strong capacitive cross-coupling effect, which may cause high-power signals to pass through the device There will be fire damage

For the sheet-shaped flying rod, it is thin and has two bending parts at the end. The bending angle tolerance in the actual stamping process is relatively large, which will inevitably lead to the bending part being remote or close to the resonant column, and the coupling amount is small when it is remote. , the amount of coupling is too large when it is too close, both of which will lead to poor consistency

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