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A wide-tuning coaxial electric tuning filter and its debugging method

An electronically tuned filter and wide-tuning technology, which is applied to waveguide devices, circuits, electrical components, etc., can solve problems such as difficulty in achieving a constant bandwidth amplitude-frequency response, difficulty in response curves, and lack of flexibility in design, processing, and debugging. , to achieve the effect of improving design and debugging efficiency, simple debugging method, and easy debugging

Active Publication Date: 2017-09-29
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the Chinese Utility Model Patent No. CN201220549062.4 discloses "a UHF band miniaturized electronic duplexer", and the Chinese Utility Model Patent No. CN200920103975.1 discloses "a low-noise "Electrically tuned filter", the coupling structure adopted is a right-angled trapezoidal or rectangular single coupling hole form, which can cover a wide frequency range, but in the case of broadband signals, it is difficult to achieve a wider octave tuning range Within, keep constant bandwidth, good amplitude frequency and echo characteristics
[0003] In the prior art, "Journal of Sichuan Institute of Light Chemical Industry" 1997 No. 3 article "Development of Four-Cavity Coaxial Tuned Microwave Filter", in the form described in the article, the inter-cavity coupling adopts a single rectangular hole, and the input and output excitation adopts a triangular The coupling loop is suitable for medium tuning range or narrow working bandwidth, but it is difficult to achieve constant bandwidth and constant amplitude-frequency response when broadband signals and wider tuning range are used. Secondly, the article described only in the 1. A fixed trapezoidal metal sheet is added to each of the fourth two resonators as a reactance compensation structure. Although the amplitude-frequency characteristics can be improved to a certain extent, there is no flexibility in design, processing and debugging, and it is not easy to have a good performance in a wide frequency range. response curve

Method used

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  • A wide-tuning coaxial electric tuning filter and its debugging method
  • A wide-tuning coaxial electric tuning filter and its debugging method
  • A wide-tuning coaxial electric tuning filter and its debugging method

Examples

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Embodiment 1

[0044] A wide-tuning coaxial electric filter, including a drive circuit 1, a stepper motor 2 controlled by the drive circuit 1, a transmission mechanism 3, a bracket 18, a shaft coupling 19, an outer cover 20 and a filter main body 4; the drive The circuit 1 includes a data storage chip 17 installed on the bracket 18; the transmission mechanism 3 includes a screw 21, a guide plate 22, and more than two guide rods 23, the screw 21 is parallel to the guide rod 23, They are respectively perpendicular to and connected to the guide plate 22; the filter body 4 is provided with more than two resonant cavities 6 and more than one inter-cavity coupling structure 7; the resonant cavity 6 is provided with an inner conductor 8 and a movable tuning rod 9; the inner conductor 8 is a metal hollow tube, one end is fixedly connected to the resonant cavity 6, and the other end of the tube has an annular elastic comb on the top; the guide plate 22 in the transmission mechanism 3 is connected to t...

Embodiment 2

[0055] like Figure 4 As shown, a debugging method of a wide-tuning coaxial electric tuning filter uses a network analyzer to debug the passband characteristics of the filter. The debugging method includes the following steps:

[0056] A) two ports of the network analyzer are respectively connected to the radio frequency interface 11 of the electronically adjustable filter to be tested;

[0057] B) Manually rotate the stepper motor 2 to determine whether the amplitude-frequency curve and echo characteristic curve appearing on the network analyzer meet the requirements, and adjust the tuning rod 9 and the frequency compensation device 10 with reference to the amplitude-frequency and echo curves to reach the The passband characteristics meet the requirements;

[0058] C) The computer and the DC power supply loaded with the test software are connected to the debugging system, and the computer continuously controls the rotation of the stepping motor 2, so that the electronically ...

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Abstract

The invention discloses a wide-tuning coaxial electric tuning filter and a debugging method thereof, and relates to the technical field of microwave communication. The electronically adjustable filter includes a drive circuit, a stepping motor, a transmission mechanism and a filter. The filter has two coupling seats, multiple resonant cavities, and multiple inter-cavity coupling structures. The coupling seat is fixedly equipped with a trapezoidal coupling ring An adjustable frequency compensation device is arranged on the outer conductor of the resonant cavity, and the inter-cavity coupling structure is a metal plate with two or more round holes or polygonal holes. The debugging method provided by the invention can make the electric tuning filter reach a tuning range above an octave and have constant bandwidth, stable amplitude-frequency and echo characteristics, improve product debugging efficiency, and reduce manufacturing and debugging costs.

Description

technical field [0001] The invention relates to a coaxial electric tuning filter and a debugging method thereof, in particular to a wide-tuning coaxial electric tuning filter and a debugging method thereof, belonging to the technical field of microwave filters in the communication field. Background technique [0002] In the prior art, the Chinese Utility Model Patent No. CN201220549062.4 discloses "a UHF band miniaturized electronic duplexer", and the Chinese Utility Model Patent No. CN200920103975.1 discloses "a low-noise "Electrically tuned filter", the coupling structure adopted is a right-angled trapezoidal or rectangular single coupling hole form, which can cover a wide frequency range, but in the case of broadband signals, it is difficult to achieve a wider octave tuning range Within, maintain a constant bandwidth, good amplitude-frequency and echo characteristics. [0003] In the prior art, "Journal of Sichuan Institute of Light Chemical Industry" 1997 No. 3 article ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/205
Inventor 李春红魏隽路雯朱秀敏
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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