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3D printing X-waveband CT structure spherical cavity waveguide band-pass filter and manufacturing method

A band-pass filter, 3D printing technology, applied in waveguide-type devices, electrical components, circuits, etc., can solve the design principles that are difficult to meet miniaturization, low insertion loss, high selectivity, high unloaded quality factor design, Increase the cost of preparation and the time of post-commissioning

Active Publication Date: 2021-06-11
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This not only makes it difficult to meet the miniaturization design principles of modern microwave devices, but also increases the preparation cost

Method used

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  • 3D printing X-waveband CT structure spherical cavity waveguide band-pass filter and manufacturing method
  • 3D printing X-waveband CT structure spherical cavity waveguide band-pass filter and manufacturing method
  • 3D printing X-waveband CT structure spherical cavity waveguide band-pass filter and manufacturing method

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Embodiment 1

[0040] Embodiment 1, the center frequency of the filter involved in the present invention is 9GHz, the relative bandwidth is 5%, the return loss is better than 30dB, and the transmission zero point is located at 9.6GHz. According to the above indicators, the coupling coefficient of the filter (M 12 = M 23 =0.0637, M 13 =0.0425) and external quality factor (Q e =10.69) and specific physical dimensions.

[0041] According to the calculated coupling coefficient and external quality factor, the coupling coefficient M between the adjacent resonators of the spherical resonator filter is ij (i,j=1,2,3) and external quality factor Q e Perform parameter extraction. Figure 7 Shown is the extracted coupling coefficient M ij and the relationship between the radius r of the spherical cavity and the coupling diameter l. Figure 8 Shown is the relationship between the extracted external quality factor Qe and the radius r of the spherical cavity with the proportionality factor s. The ...

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Abstract

The invention discloses a 3D printing X-waveband CT structure spherical cavity waveguide band-pass filter and a manufacturing method. The 3D printing X-waveband CT structure spherical cavity waveguide band-pass filter is composed of three spherical resonant cavities and an input and output feed waveguide, wherein the three resonant cavities are magnetically coupled, two paths can be formed from a signal inlet S to a signal outlet L, cross coupling exists between the first resonant cavity and the third resonant cavity, a transmission zero point can be generated in a high-stop-band, and through CST software simulation, a device object is manufactured by using a 3D printing technology according to the overall structure of the CT structure spherical cavity filter finally.

Description

technical field [0001] The invention relates to the fields of filter design and 3D printing, in particular to a design scheme of a spherical cavity waveguide bandpass filter with a CT topology. Background technique [0002] As an important device for separating signals in the system, in order to meet the design requirements of modern devices, the filter has high selectivity, low insertion loss, out-of-band rejection, and good quality factor as much as possible while realizing the miniaturization of the physical size. Excellent performance characteristics are particularly important. [0003] At present, in order to achieve higher selectivity in performance, traditional non-cross-coupled filters (such as maximum flattening filters, Chebyshev filters, etc.) can only sacrifice physical size and rely on increasing the individual filter cavity. Number (that is, increasing the order of the filter) to achieve. This not only makes it difficult to meet the miniaturization design pri...

Claims

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Application Information

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IPC IPC(8): H01P1/208H01P11/00
CPCH01P1/208H01P11/007
Inventor 李若琛徐军林怡呈张帆张翊
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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