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Magnetic tuned filter with magnetic circuit air gap field fine tuning structure and debugging method

An air-gap field and magnetic tuning technology, which is applied to waveguide devices, circuits, electrical components, etc., can solve the problems of inconsistent resonant frequency of resonant balls, failure to meet technical index requirements, and low production efficiency, so as to improve technical index, Improve production efficiency, reduce the effect of standing wave matching and synchronous matching

Active Publication Date: 2022-07-01
SOUTHWEST INST OF APPLIED MAGNETICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a magnetic circuit air gap field fine-tuning structure that solves the problems of inconsistency in the resonant frequencies of resonant balls at all levels, resulting in failure to meet the technical index requirements of each frequency point, cumbersome debugging, and low production efficiency. Magnetic tuned filter and debugging method

Method used

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  • Magnetic tuned filter with magnetic circuit air gap field fine tuning structure and debugging method
  • Magnetic tuned filter with magnetic circuit air gap field fine tuning structure and debugging method
  • Magnetic tuned filter with magnetic circuit air gap field fine tuning structure and debugging method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1: see Figure 1-Figure 5 ,and Figure 10 , a magnetic tuning filter with a magnetic circuit air gap field fine-tuning structure, including an upper magnetic circuit 2 and a lower magnetic circuit 1, the upper magnetic circuit 2 is provided with an upper magnetic pole 9, and the lower magnetic circuit 1 is provided with a lower magnetic pole 10, A working air gap is arranged between the upper magnetic pole 9 and the lower magnetic pole 10, and a resonant circuit 3 is arranged between the working air gaps. The small ball adjusting rod 7 of the small ball 4, the resonant small balls 4 at both ends are the input and output small balls, and the middle one is the inter-stage small ball;

[0044] It is characterized in that: when there are three resonant balls 4, the upper magnetic pole 9 is vertically provided with a through screw hole 5 at the position corresponding to the interstage ball, and a fine adjustment screw 6 is arranged in the through screw hole 5;

[0...

Embodiment 2

[0060] Example 2: see Image 6 , Figures 7a-7c , a magnetic tuning filter with a magnetic circuit air gap field fine-tuning structure, the resonant balls 4 are three, and the rest are the same as the magnetic tunable filter with a magnetic circuit air-gap field fine-tuning structure in Embodiment 1.

[0061] Its debugging method is:

[0062] (1) Connect the product to be debugged to an appropriate amount of network analyzer equipment, and the operating frequency of the low-frequency end of the product is f 1 , the operating frequency of the high-frequency end is f 2 , adjust the coupling degree of each resonant ball 4 so that f 1 or f 2 At least one place satisfies the resonant frequency of all resonant balls 4 to be the same, and the response waveform is normal, see Figure 7a .

[0063] (2) Judgment f 1 or f 2 Whether the response waveforms are normal, in this embodiment, f 1 The response waveform at is normal, f 2 The response waveform at is not normal,...

Embodiment 3

[0067] Example 3: see Figure 8 , Figures 9a-9c , a magnetic tuning filter with a magnetic circuit air gap field fine-tuning structure, its resonant balls 4 are six, only two fine-tuning screws 6 are set at the input and output ball positions, and the rest are the same as the magnetic circuit in Example 1. The magnetic tuning filter structure of the air gap field fine-tuning structure is the same.

[0068] Its debugging method is:

[0069] (1) Connect the product to be adjusted into the vector network analyzer equipment, if the operating frequency of the low-frequency end of the device is f 1 , the operating frequency of the high-frequency end is f 2 , adjust the coupling degree of each resonant ball 4 so that f 1 or f 2 At least one place satisfies the resonant frequency of all resonant balls 4 to be the same, and the response waveform is normal, see Figure 9a ;

[0070] (2) Judgment f 1 or f 2 Whether the response waveforms are normal, in this embodiment, ...

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Abstract

The invention discloses a magnetic tuning filter with a magnetic circuit air gap field fine tuning structure and a debugging method, the filter comprises an upper magnetic circuit, a lower magnetic circuit, a working air gap and a resonant circuit, the resonant circuit comprises a plurality of coupled small resonant balls, one side of each small resonant ball is provided with a ball adjusting rod, and when the number of the small resonant balls is three, the upper magnetic circuit corresponds to the interstage small ball, and the lower magnetic circuit corresponds to the interstage small ball. When the number of the small resonance balls is larger than three, the positions, corresponding to the small input and output balls, of the upper magnetic circuit are each vertically provided with a through screw hole, and a fine adjustment screw is arranged in each through screw hole. According to the invention, the debugging mode is simple, the local magnetic field of the individual small ball is adjusted through the fine tuning screw, and the fixed frequency difference of the individual small ball is adjusted by combining the small ball adjusting rod, so that the frequency of the harmonic oscillator and the frequencies of other harmonic oscillators coincide in a wide frequency range. The problems of filter response waveform deformation and index deterioration caused by frequency asynchronism of the small resonant balls during broadband tuning are solved, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a filter and a debugging method, in particular to a magnetic tuning filter with a magnetic circuit air gap field fine-tuning structure and a debugging method. Background technique [0002] The magnetic tuning filter is made based on the principle of ferromagnetic resonance. It is mainly composed of a magnetic circuit unit and a resonant circuit unit. The magnetic circuit unit is mainly composed of an upper and a lower magnetic circuit and a coil. The working air gap can be continuously adjusted by the change of the coil current. magnetic field H e ; The resonant circuit unit is mainly composed of multi-stage ferrite balls and coupling rings. H e Under excitation, it will tune in a certain frequency range. At the same time, the small ball in the resonant circuit will also withstand the high-frequency magnetic field generated when the external input microwave signal passes through the coupling ring H a , the magnetocrystall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/217
CPCH01P1/217
Inventor 张平川蓝江河燕志刚王大勇何志强
Owner SOUTHWEST INST OF APPLIED MAGNETICS
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