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Dielectric filter coupling structure with symmetric zero point characteristic

A dielectric filter, zero-point characteristic technology, applied in waveguide-type devices, electrical components, circuits, etc., to achieve the effect of improving design flexibility and flexible arrangement

Pending Publication Date: 2019-05-07
江西一创新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the previous dielectric filter coupling structure with symmetrical zero characteristics formed a fixed symmetrical zero arrangement, that is, the zero point at the high end of the filter passband is always closer to the passband than the zero point at the low end.

Method used

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  • Dielectric filter coupling structure with symmetric zero point characteristic
  • Dielectric filter coupling structure with symmetric zero point characteristic
  • Dielectric filter coupling structure with symmetric zero point characteristic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] On the basis of the above scheme, in one embodiment, combined with figure 2 As shown, if the third blind hole used to realize the main coupling (m34)2 is biased to the center of the dielectric filter body, that is, to one end of the first blind hole, the response curve is as follows image 3 As shown, the high-side null 6 is closer to the passband than the low-side zero 7, and the cross-coupling (m24) is capacitive coupling. to combine figure 2 As shown, the greater the offset distance 5 between the axis of the third blind hole and the line connecting the axes of the two second blind holes, the stronger the asymmetry between the high-end zero point 6 and the low-end zero point 7, and vice versa.

Embodiment 2

[0024] In another embodiment, combining Figure 4 As shown, if the third blind hole used to realize the main coupling (m34)2 is biased towards the outer edge of the dielectric filter body, the response curve is as follows Figure 5 As shown, the low-side zero 10 is closer to the passband than the high-side zero 9. to combine Figure 4 As shown, the greater the offset distance 8 between the axis of the third blind hole and the line connecting the axes of the two second blind holes, the stronger the asymmetry between the high-end zero point 9 and the low-end zero point 10, and vice versa.

Embodiment 3

[0026] In another embodiment, combining Figure 6 As shown, if the third blind hole used to realize the main coupling (m34)2 is slightly deviated from the outer edge of the dielectric filter body, the response curve is as follows Figure 7 As shown, the low-end zero point 13 and the high-end zero point 12 are arranged symmetrically. to combine Figure 6 As shown, when the offset distance 11 between the axis of the third blind hole and the line connecting the axes of the two second blind holes is equal to a certain value, the distances between the high-end zero point 12 and the low-end zero point 13 are completely equal to the passband , showing a symmetrical arrangement.

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Abstract

The invention relates to a dielectric filter coupling structure with a symmetric zero point characteristic, which comprises a dielectric filter body, wherein the dielectric filter body is rectangular,the upper surface of the dielectric filter body is symmetrically provided with two first blind holes along two sides of a central axis, the upper surface of the dielectric filter body is provided with second blind holes along one ends of the first blind holes; the dielectric between the first blind hole and the second blind hole at the same side form a first main coupling, the dielectric betweenthe two main couplings forms a first cross coupling; the two second blind holes are provided with a third blind hole therebetween, the third blind hole forms a second main coupling, and the dielectricbetween the two second blind holes and the third blind hole forms a second cross coupling. The dielectric filter coupling structure can realize an asymmetric response curve with the low-end zero point being close to the passband or the high-end zero point being close to the bandpass through introducing the third blind hole, so that the design flexibility of a dielectric filter is improved.

Description

technical field [0001] The invention relates to a dielectric filter coupling structure with symmetrical zero-point characteristics, and belongs to the technical field of electronic components in the communication field. Background technique [0002] In recent years, with the increasing demand for high performance and miniaturization of communication equipment, dielectric filters have received more and more attention. However, in the previous dielectric filter coupling structure with symmetrical zero characteristics, the symmetrical zero arrangement characteristics formed are fixed, that is, the zeros at the high end of the filter passband are always closer to the passband than the zeros at the low end. Contents of the invention [0003] The present invention provides a dielectric filter coupling structure with symmetrical zero-point characteristics, which can not only realize zero-point symmetric response curves, but also realize asymmetric response curves in which low-end...

Claims

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Application Information

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IPC IPC(8): H01P1/20
CPCH01P1/2088
Inventor 何祥勇王一凡王平舒剑龙
Owner 江西一创新材料有限公司