A filter for realizing frequency modulation by gear transmission structure

A gear transmission and filter technology, applied in the field of filters, can solve the problems of limited frequency modulation range of frequency modulation screw and inconvenient operation, and achieve the effect of good insertion loss performance and simple operation.

Active Publication Date: 2022-08-09
WUHAN FINGU ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem that the FM range of the existing tunable filter using the FM screw is limited and the operation is inconvenient

Method used

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  • A filter for realizing frequency modulation by gear transmission structure
  • A filter for realizing frequency modulation by gear transmission structure
  • A filter for realizing frequency modulation by gear transmission structure

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Experimental program
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Embodiment approach

[0029] A specific implementation manner, the gear transmission assembly 5 includes a first gear set that is drivingly connected to the driving mechanism 3, and a second gear set that is meshed and connected to the first gear set; the tuning rod 7 is along the second gear set. Circumferential distribution of groups. In this embodiment, the drive mechanism 3 drives the first gear set to rotate, thereby driving the second gear set to rotate, and the rotation of the second gear set can drive the tuning rod 7 connected to it to rotate. The tuning rods 7 distributed in different positions are driven to move up or down synchronously, thereby realizing the purpose of adjusting the center frequency of the filter by adjusting the depth of the tuning rods 7 inserted into the resonant cavity 18; and the diameters of different gear sets can be designed to change The transmission ratio of the transmission between the gear sets achieves the purpose of precisely controlling the rotation amoun...

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Abstract

The invention provides a filter with a gear transmission structure for realizing frequency modulation, which includes a cavity, a tuning mechanism, a driving mechanism and a cover plate. On the cover plate, the tuning mechanism includes a gear transmission assembly, a tuning rod and a gear bushing, the lower part of the tuning rod is inserted into the resonant cavity through the tuning hole, and the tuning rod is threadedly connected with the tuning hole, and the gear bushing on the upper part of the tuning rod is connected with the gear transmission assembly The meshing transmission is connected, and the driving mechanism is connected with the gear transmission assembly for driving the gear transmission assembly to rotate so that the tuning rod is inserted into the resonance cavity and the insertion depth is adjusted. The invention drives the gear bushings on a plurality of tuning rods to rotate synchronously through the gear transmission assembly, so as to achieve the purpose of tuning the frequency by adjusting the depth of the tuning rods inserted into the resonant cavity. good insertion loss performance.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a filter whose gear transmission structure realizes frequency modulation. Background technique [0002] In the field of communication, it is widely used as a frequency selection device. It can filter various power supplies and signals to ensure the stability and reliability of circuit operation. It is a very important component in the field of electronic communication. [0003] In recent years, the development of communication systems has made tunable filters in the microwave frequency band widely used. Most tunable filters are realized by adding tuning structures on the basis of waveguide filters. The traditional tuning structure is a frequency modulation screw, which changes the capacitive coupling value between the cover plate and the resonant rod by adjusting the length of the screw extending into the cavity to achieve the purpose of adjusting the frequency;...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/208
CPCH01P1/208
Inventor 蔡绍伟朱晖
Owner WUHAN FINGU ELECTRONICS TECH
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