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A single-cavity three-mode ceramic waveguide resonator and filter

A technology of waveguide filter and waveguide resonance, which is applied in the direction of waveguide devices, circuits, electrical components, etc., can solve the problems that it is difficult to meet the requirements of small volume and high out-of-band suppression characteristics at the same time, so as to improve the out-of-band suppression characteristics and reduce the volume effect

Active Publication Date: 2022-08-09
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is difficult for this technology to meet the requirements of small size and high out-of-band suppression characteristics at the same time

Method used

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  • A single-cavity three-mode ceramic waveguide resonator and filter
  • A single-cavity three-mode ceramic waveguide resonator and filter
  • A single-cavity three-mode ceramic waveguide resonator and filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] like figure 1 As shown, in one of the embodiments of the present invention, a single-cavity three-mode ceramic waveguide resonator is provided, which includes a ceramic waveguide resonator body 10 with a metal coating on the surface, three tuning blind holes and three tuning holes on the surface of the body. Coupling blind vias.

[0051] The three tuning blind holes provided on the surface of the resonator body are respectively tuning blind hole A1, tuning blind hole A2 and tuning blind hole A3, wherein the tuning blind hole A1 is located on the upper surface of the resonator, and the depth of the blind hole is adjustable. Adjusting the depth of the tuning blind hole A1 adjusts the resonant frequency of the resonator TE101 mode. The tuning blind hole A2 and the tuning blind hole A3 are located on the side of the resonator. In this embodiment, the tuning blind hole A2 and the tuning blind hole A3 are located on the same side (based on the figure 1 Look, located in fron...

Embodiment 2

[0056] like figure 2 As shown, the difference from Embodiment 1 is that in this embodiment, the tuning blind hole A2 and the tuning blind hole A3 are located on adjacent sides (based on the attached figure 2 See, are located on the left side and the front side respectively), the blind coupling hole B3 can be located on any one of the four sides, and the depth of the blind coupling hole B3 is smaller than that of the blind tuning holes A2 and A3 arranged on the side. At this time, the coupling between the two quasi-TEM modes is negative coupling, and the resonator can be regarded as a capacitive CT structure, which produces a transmission zero at the low frequency end of the passband.

Embodiment 3

[0058] like image 3 As shown, the difference from Embodiment 1 is that in this embodiment, the tuning blind hole A2 and the tuning blind hole A3 are located on two opposite sides (based on the attached image 3 See, the front and the back of the sides, respectively), the blind coupling hole B3 can be located on any of the four sides. At this time, the coupling between the two quasi-TEM modes is negative, and the resonator can be regarded as a capacitive CT structure, which produces a transmission zero at the low frequency end of the passband.

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Abstract

The invention discloses a single-cavity three-mode ceramic waveguide resonator and a filter, which belong to the technical field of microwave communication. The resonator includes: a ceramic waveguide resonator body, and three blind tuning holes and three blind coupling holes located on the surface of the main body, wherein the blind tuning holes A1 and the blind coupling holes B1 and B2 are relatively arranged on the upper and lower surfaces of the main body, and the blind tuning holes are The holes A2, A3 and the blind coupling hole B3 are arranged on four sides; the depth of the blind coupling hole B3 is smaller than the depth of the blind tuning holes A2 and A3; the blind tuning hole A1 is used to adjust the resonant frequency of the resonator TE101 mode , the tuning blind holes A2 and A3 are respectively used to adjust the resonant frequencies of the two quasi-TEM modes; the coupling blind holes B1 and B2 are respectively used to adjust the coupling bandwidth of the resonator TE101 mode and the two quasi-TEM modes, so The blind coupling hole B3 is used to adjust the coupling bandwidth between the two quasi-TEM modes. The invention reduces the volume of the ceramic waveguide filter and improves the out-of-band suppression characteristic of the filter.

Description

technical field [0001] The invention belongs to the technical field of microwave communication, and more particularly, relates to a single-cavity three-mode ceramic waveguide resonator and a filter. Background technique [0002] The rapid development of contemporary communication technology and limited spectrum resources have put forward higher requirements on the size and performance of the base station filter. Ceramic waveguide filters have become the mainstream choice for current 5G base station filters due to their unique advantages such as small size and high performance. In order to further reduce the volume of the filter, the ceramic waveguide filter usually needs to use a single-cavity multi-mode resonator to complete the design; on the other hand, in order to effectively improve the out-of-band suppression characteristics of the filter, the designer needs to construct a CT or capacitive CQ. coupling structures to generate transmission zeros. [0003] The design of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/208
CPCH01P1/2082
Inventor 梁飞蒙顺良尹宇豪张榕吕文中王晓川
Owner HUAZHONG UNIV OF SCI & TECH