Single-cavity three-mode cavity resonator filter with bent grounded probe for feeding

A technology of grounding probes and resonators, which is applied in the direction of circuits, electrical components, waveguide devices, etc., can solve the problems of difficult processing and small tuning range, and achieve the effects of easy processing, simple structure, and wide fractional bandwidth

Inactive Publication Date: 2015-01-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The author proposes a three-mode structure using metal cavity chamfering, the structure is as follows Figure 5a As shown in , several resonant modes are shifted to our required passband by controlling the size of the cut angle. Its simulation results are as follows Figure 5b shown; the structure of this coupling method is not easy to process
[0007] 4) In January 2004, L.H.Chua et al published an article titled "Analysis of dielectric loaded cubic cavity for triplemode filter design", proposing to use the coaxial cable as the feed, such as Figure 6a As shown, the dielectric cavity filter structure using tuning screws, the simulation results are as follows Figure 6b As shown; the adjustable range of this structure using coupling screws is relatively small, and there are certain deficiencies

Method used

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  • Single-cavity three-mode cavity resonator filter with bent grounded probe for feeding
  • Single-cavity three-mode cavity resonator filter with bent grounded probe for feeding
  • Single-cavity three-mode cavity resonator filter with bent grounded probe for feeding

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Effect test

Embodiment 1

[0047] Such as Figure 7 ~ Figure 11 As shown, the filter of this embodiment includes a cylindrical cavity 1, a first port 2 and a second port 3, the first port 2 and the second port 3 are arranged at the bottom of the cylindrical cavity 1 and run through the cylindrical cavity The bottom outer wall and inner wall of 1, the first port 2 and the second port 3 can be used as both input ports and output ports;

[0048] A first conductor assembly is provided at the first port 2, and a first conductor assembly is provided at the second port 3; the first conductor assembly includes a first x-axis conductor 4, a first y-axis conductor 5 And the first z-axis conductor 6, the second conductor assembly includes a second x-axis conductor 7, a second y-axis conductor 8 and a second z-axis conductor 9; in the cylindrical cavity 1, the One end of the first y-axis conductor 5 is connected to one end of the first z-axis conductor 6 through the first x-axis conductor 4 to form a bent ground p...

Embodiment 2

[0055] The main features of this embodiment are: as Figure 17 As shown, the first port 2 is set on the left side of the cylindrical cavity 1, and runs through the left outer wall and the inner wall of the cylindrical cavity 1, and the second port 3 is set on the right side of the cylindrical cavity 1, and runs through the The right outer wall and inner wall of the cylindrical cavity 1; the first y-axis conductor 5 is a first coaxial inner conductor, the other end of which extends out of the cylindrical cavity 1 from the first port 2, and is welded with a first coaxial An axial outer conductor 10, the first coaxial outer conductor 10 is fixed on the outer wall of the cylindrical cavity 1 at the first port 2; the second y-axial conductor 8 is a second coaxial inner conductor, the other end of which is from The second port 3 extends out of the cylindrical cavity 1, and is connected with a second coaxial outer conductor 11, and the second coaxial outer conductor 11 is fixed on th...

Embodiment 3

[0057] The main features of this embodiment are: as Figure 18 As shown, the first conductor assembly and the second conductor assembly are centrally symmetrical about any point on the longitudinal centerline of the cylindrical cavity 1 as a whole. All the other are with embodiment 2.

[0058] In the above-mentioned embodiments 1-3, the metal material used in the cylindrical cavity 1, the first conductor assembly and the second conductor assembly can be any one of aluminum, iron, tin, copper, silver, gold and platinum, or can be It is an alloy of any one of aluminum, iron, tin, copper, silver, gold and platinum.

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Abstract

The invention discloses a single-cavity three-mode cavity resonator filter with a bent grounded probe for feeding. The single-cavity three-mode cavity resonator filter comprises a cylindrical cavity, a first port and a second port, and the first port and the second port are formed in the cylindrical cavity and penetrate through the outer wall and the inner wall of the cylindrical cavity; a first conductor assembly is arranged at the first port, and a second conductor assembly is arranged at the second port; the first conductor assembly comprises a first x-axis conductor, a first y-axis conductor and a first z-axis conductor, and the second conductor assembly comprises a second x-axis conductor, a second y-axis conductor and a second z-axis conductor; in the cylindrical cavity, one end of the first x-axis conductor is connected with one end of the first z-axis conductor through the first y-axis conductor, and one end of the second x-axis conductor is connected with one end of the second z-axis conductor through the second y-axis conductor. The single-cavity three-mode cavity resonator filter has the advantages of being simple in structure, easy to machine and good in performance; in addition, the wider fractional bandwidth is achieved, and the requirement of a communication system can be met.

Description

technical field [0001] The invention relates to a filter, in particular to a filter using a single-cavity three-mode cavity resonator fed by a bent grounding probe, and belongs to the field of wireless communication. Background technique [0002] Microwave filter is an indispensable device in the transmitting and receiving ends of modern communication systems. It separates signals, allowing useful signals to pass through without attenuation as much as possible, and suppressing useless signals from passing through with as much attenuation as possible. With the development of wireless communication technology, the frequency band between signals becomes narrower and narrower, which puts forward higher requirements on the specification and reliability of filters. The cavity filter has the advantages of high Q value, large power capacity, easy implementation and stable performance, so it has high application value. The cavity filter achieves inductive or capacitive coupling by o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/207
Inventor 王世伟林景裕冯世芬郭在成褚庆昕
Owner SOUTH CHINA UNIV OF TECH
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