CN211829134U

CN211829134U - Symmetrical and asymmetrical zero structure of dielectric waveguide filter

Info

Publication number: CN211829134U
Application number: CN202020339854.3U
Authority: CN
Inventors: 成功; 田原; 钱涌; 陈守镇
Original assignee: Wuxi Huihong Electronic Co Ltd
Current assignee: Zhejiang Huifeng Electronics Co.,Ltd.
Priority date: 2020-03-18
Filing date: 2020-03-18
Publication date: 2020-10-30
Anticipated expiration: 2030-03-18

Abstract

The utility model provides a dielectric waveguide filter symmetry and asymmetric zero structure, which comprises a dielectric body, be provided with four or more than four resonant cavities on the dielectric body, separate one of them through a plurality of isolation logical groove between a plurality of resonant cavities a U type blind hole has been seted up on the resonant cavity, U type blind hole is used for adjusting secondary mode or cubic mode entering passband and reaches the electromagnetic field rotation, realizes each zero point in its both sides, all the other tuned frequency blind hole has been seted up on the resonant cavity. Through the utility model discloses, it is lower to solve the interference killing feature that prior art exists, realize the problem of difficulty at zero point.

Description

Symmetrical and asymmetrical zero structure of dielectric waveguide filter

Technical Field

The utility model relates to a wave filter technical field, specifically speaking relate to a dielectric waveguide filter symmetry and asymmetric zero structure.

Background

In the rapid development of communication technology, communication systems are updated, but different systems need to coexist simultaneously within a certain time, and base station resources are more and more in shortage, so that requirements are made on miniaturization and lightweight products, and interference resistance is required among multiple system frequency bands. The high-dielectric-constant ceramic dielectric filter can effectively reduce the volume and the weight, but the realization of the zero point by the ceramic dielectric waveguide is difficult.

SUMMERY OF THE UTILITY MODEL

The utility model provides a dielectric waveguide filter symmetry and asymmetric zero structure to the interference killing feature who solves prior art existence is lower, the problem of zero point realization difficulty.

In order to solve the technical problem, the utility model provides a dielectric waveguide filter symmetry and asymmetric zero structure, which comprises a dielectric body, be provided with four or the resonant cavities more than four on the dielectric body, separate through the logical groove of a plurality of isolations between a plurality of resonant cavities, one of them U type blind hole has been seted up on the resonant cavity, U type blind hole is used for adjusting secondary mode or cubic mode and gets into the passband and reach the electromagnetic field rotation, realizes each zero point of its both sides, all the other tuned frequency blind hole has been seted up on the resonant cavity.

The groove width of the U-shaped blind hole groove is larger than 1 mm.

The depth of the U-shaped blind slot exceeds 1/2 the thickness of the media body.

And the right angle of the U-shaped blind hole is subjected to fillet treatment.

The thickness of the groove wall from the U-shaped blind hole to the medium body is larger than 1 mm.

The medium body is made of a non-metal medium with the dielectric constant ER ranging from 2 to 150.

And the surface of the medium body is subjected to metallization shielding treatment to cover the metal layer, and the thickness of the metal layer is larger than 3 um.

The utility model discloses the beneficial effect who brings: compared with the prior art, the utility model discloses a dielectric waveguide filter symmetry passes through U type blind hole adjustment secondary mode or cubic mould entering passband rotation that reaches the electromagnetic field with asymmetric zero structure, realizes each zero point in its both sides, promotes the filter outband and restraines to the increase is to other communication frequency channel interference killing feature, reduction loss.

Drawings

Fig. 1 is a top view of a symmetrical and asymmetrical zero structure of a dielectric waveguide filter according to an embodiment of the present invention

FIG. 2 is a cross-sectional view of the step at A-A in FIG. 1

FIG. 3 is a S-parameter curve of symmetrical and asymmetrical zero structure of dielectric waveguide filter according to an embodiment of the present invention

Fig. 4 is a second S-parameter curve of the symmetrical and asymmetrical zero structure of the dielectric waveguide filter according to the embodiment of the present invention, wherein the second S-parameter curve includes 1-dielectric body, 2-resonant cavity, 3-isolation through groove, 4-U-shaped blind hole, and 5-tuning frequency blind hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-4, the utility model provides a dielectric waveguide filter symmetry and asymmetric zero structure, including dielectric body 1, be provided with four or four above resonant cavities 2 on the dielectric body 1, separate through groove 3 through a plurality of isolation between a plurality of resonant cavities 2, one of them U type blind hole 4 has been seted up on the resonant cavity 2, U type blind hole 4 is used for adjusting secondary mode or cubic mode entering passband and reaches the electromagnetic field rotation, realizes each zero point of its both sides, all the other tuned frequency blind hole 5 has been seted up on the resonant cavity 2.

Further, the groove width of the U-shaped blind hole 4 groove is larger than 1 mm.

Further, the depth of the groove of the U-shaped blind hole 4 exceeds 1/2 of the thickness of the medium body 1.

Further, the right angle of the U-shaped blind hole 4 is subjected to fillet treatment.

Further, the thickness of the groove wall from the U-shaped blind hole 4 to the medium body 1 is more than 1 mm.

Further, the medium body 1 is made of a non-metal medium with a dielectric constant ER in a range of 2-150.

Further, the surface of the dielectric body 1 is subjected to metallization shielding treatment to cover the metal layer, and the thickness of the metal layer is larger than 3 um.

In debugging the utility model discloses the time, use the metal level that the metal bistrique will need to peel off to satisfy its electrical property requirement.

The utility model discloses use on 2GHz-10 GHz's wave filter product.

To sum up, the utility model discloses a dielectric waveguide filter symmetry passes through U type blind hole adjustment secondary mode or cubic mould entering passband rotation that reaches the electromagnetic field with asymmetric zero structure, realizes each zero point in its both sides, promotes the filter outband and restraines to the increase is to other communication frequency channel interference killing feature, reduction loss.

The above description is only an example of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The utility model provides a dielectric waveguide filter symmetry and asymmetric zero structure, includes dielectric body (1), be provided with four or more than four resonant cavities (2) on dielectric body (1), separate its characterized in that through groove (3) are kept apart to a plurality of resonant cavities (2) between through a plurality of: one of the resonant cavities (2) is provided with a U-shaped blind hole (4), the U-shaped blind hole (4) is used for adjusting a secondary mode or a tertiary mode to enter a passband to achieve electromagnetic field rotation, zero points on two sides of the U-shaped blind hole are achieved, and the other resonant cavities (2) are provided with frequency tuning blind holes (5).

2. The symmetric and asymmetric zero structure of a dielectric waveguide filter according to claim 1, characterized in that the slot width of the slot of the U-shaped blind hole (4) is larger than 1 mm.

3. The symmetric and asymmetric zero structure of the dielectric waveguide filter as claimed in claim 1, wherein the depth of the slot of the U-shaped blind hole (4) exceeds 1/2 of the thickness of the dielectric body (1).

4. The symmetric and asymmetric zero structure of the dielectric waveguide filter as claimed in claim 1, wherein the right angle of the U-shaped blind hole (4) is rounded.

5. The symmetric and asymmetric zero structure of a dielectric waveguide filter as claimed in claim 1, characterized in that the wall thickness of the slot from the U-shaped blind hole (4) to the dielectric body (1) is more than 1 mm.

6. The symmetric and asymmetric zero structure of the dielectric waveguide filter as claimed in claim 1, wherein the dielectric body (1) is made of a non-metallic medium having a dielectric constant ER in the range of 2-150.

7. The symmetric and asymmetric zero structure of the dielectric waveguide filter according to claim 1, wherein the surface of the dielectric body (1) is metallized and shielded to cover a metal layer, and the thickness of the metal layer is greater than 3 um.