CN112635941A

CN112635941A - Miniaturized dielectric filter for 5G communication

Info

Publication number: CN112635941A
Application number: CN202011466825.4A
Authority: CN
Inventors: 李凯; 唐春宝; 黄振新; 孙佳佳; 詹绪明
Original assignee: Suzhou Weijie Communication Technology Co ltd
Current assignee: Suzhou Anjie Technology Co Ltd
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-04-09

Abstract

The invention relates to a miniaturized dielectric filter for 5G communication, comprising: the upper surface of the medium base body is provided with a signal input port and a signal output port, first to eighth resonators are sequentially arranged between the signal input port and the signal output port, a first flying rod is arranged on one sides of the first to fourth resonators to form a first CQ structure, a second flying rod is arranged on one sides of the fifth to eighth resonators to form a second CQ structure, and a balance flying rod is arranged on one sides of the first CQ structure and the second CQ structure. The parallel coaxial resonators are arranged on the dielectric substrate in parallel, coupling between the resonators is achieved through the coupling structure, the first flying rod and the second flying rod form two CQ structures, and meanwhile, the left zero position and strength of the filter can be accurately controlled by adjusting the length and position of the balance flying rod, zero controllable symmetry is achieved, the high suppression requirement of the filter is met, and the size of the filter can be further reduced.

Description

Miniaturized dielectric filter for 5G communication

Technical Field

The invention relates to the technical field of filters, in particular to a miniaturized dielectric filter for 5G communication.

Background

With the rapid development of 5G communication technology, the size requirement of the filter is higher and higher, and the dielectric filter is widely applied with obvious advantages in terms of performance and size. The single-block dielectric filter has a smaller volume due to a special structure, the topological structure of the single-block dielectric filter is more flexible, control of a zero point in the single-block dielectric filter is difficult in the industry, the performance of the filter is generally sacrificed while miniaturization is achieved, along with improvement of the suppression requirement of a communication technology on a filter sideband, the single-block dielectric filter has the capability of zero point control while miniaturization is achieved, and the single-block dielectric filter becomes the optimization direction of the dielectric filter.

Disclosure of Invention

In order to solve the technical problems, the invention provides a miniaturized dielectric filter for 5G communication, which has the advantages of small volume, controllable and symmetrical zero point and good suppression performance.

In order to achieve the purpose, the technical scheme of the invention is as follows:

a miniaturized dielectric filter for 5G communications, comprising: the resonator comprises a dielectric substrate, wherein a signal input port and a signal output port are arranged on the upper surface of the dielectric substrate, a first resonator, a second resonator, a third resonator, a fourth resonator, a fifth resonator, a sixth resonator, a seventh resonator and an eighth resonator are sequentially arranged between the signal input port and the signal output port, capacitive coupling is adopted between the first resonator and the second resonator, between the third resonator and the fourth resonator, between the fifth resonator and the sixth resonator and between the seventh resonator and the eighth resonator, inductive coupling is adopted between the second resonator and the third resonator, between the fourth resonator and the fifth resonator and between the sixth resonator and the seventh resonator, and the first resonator, the second resonator, the seventh resonator and the eighth resonator are all inductively coupled, And a first flying rod is arranged on one side of the third resonator and one side of the fourth resonator to form a first CQ structure, a second flying rod is arranged on one side of the fifth resonator, the sixth resonator, the seventh resonator and the eighth resonator to form a second CQ structure, and a balance flying rod is arranged on the side, opposite to the side where the first flying rod and the second flying rod are arranged, of the first CQ structure and the second CQ structure.

As a preferable scheme of the present invention, the dielectric substrate is provided with metal shielding layers on the periphery and the lower surface.

In a preferred embodiment of the present invention, the first resonator, the second resonator, the third resonator, the fourth resonator, the fifth resonator, the sixth resonator, the seventh resonator, and the eighth resonator are formed by coaxially penetrating holes formed in parallel metal pieces.

As a preferable aspect of the present invention, the metal shielding layer is provided with a connection area corresponding to the signal input port and the signal output port, and the signal input port and the signal output port extend to the connection area.

As a preferable aspect of the present invention, a first ground rod connected to the metal shielding layer is disposed between the second resonator and the third resonator, a second ground rod connected to the metal shielding layer is disposed between the fourth resonator and the fifth resonator, and a third ground rod connected to the metal shielding layer is disposed between the sixth resonator and the seventh resonator.

In a preferred embodiment of the present invention, the dielectric substrate is made of a dielectric ceramic material.

In conclusion, the invention has the following beneficial effects:

the invention provides a miniaturized dielectric filter for 5G communication, wherein a row of parallel coaxial resonators are arranged on a dielectric substrate, coupling among the resonators is realized through a coupling structure, two CQ structures are formed through a first flying rod and a second flying rod, and meanwhile, the position and the strength of a zero point on the left side of the filter can be accurately controlled by adjusting the length and the position of a balance flying rod, so that the controllable symmetry of the zero point is realized, the high suppression requirement of the filter is met, and the size of the filter can be further reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

FIG. 2 is a top view of an embodiment of the present invention.

Fig. 3 is a topology implemented by an embodiment of the present invention.

Fig. 4 is a frequency characteristic graph of an embodiment of the present invention.

Fig. 5 is a frequency characteristic graph of the embodiment of the present invention with the balance fly rod removed.

The corresponding part names indicated by the numbers and letters in the drawings:

1. a first resonator; 2. a second resonator; 3. a third resonator; 4. a fourth resonator; 5. a fifth resonator; 6. a sixth resonator; 7. a seventh resonator; 8. an eighth resonator; 9. a first fly rod; 10. a second fly rod; 11. a first ground bar; 12. a third ground rod; 13. a signal input port; 14. a signal output port; 15. balancing a flying rod; 16. a metal shielding layer; 17. a second ground bar.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

A miniaturized dielectric filter for 5G communication, as shown in fig. 1 to 5, comprising: the resonator comprises a dielectric substrate, wherein a signal input port 13 and a signal output port 14 are arranged on the upper surface of the dielectric substrate, a first resonator 1, a second resonator 2, a third resonator 3, a fourth resonator 4, a fifth resonator 5, a sixth resonator 6, a seventh resonator 7 and an eighth resonator 8 are sequentially arranged between the signal input port 13 and the signal output port 14, and the first resonator 1, the second resonator 2, the third resonator 3, the fourth resonator 4, the fifth resonator 5, the sixth resonator 6, the seventh resonator 7 and the eighth resonator 8 are formed by coaxially-perforated holes formed in parallel metal sheets so as to form a row of coaxial resonators.

Capacitive coupling is adopted between the first resonator 1 and the second resonator 2, between the third resonator 3 and the fourth resonator 4, between the fifth resonator 5 and the sixth resonator 6, and between the seventh resonator 7 and the eighth resonator 8, and the capacitive coupling is realized in a manner similar to a plate capacitor; inductive coupling is adopted between the second resonator 2 and the third resonator 3, between the fourth resonator 4 and the fifth resonator 5, and between the sixth resonator 6 and the seventh resonator 7, a first grounding rod 11 connected with the metal shielding layer 16 is arranged between the second resonator 2 and the third resonator 3, a second grounding rod 17 connected with the metal shielding layer 16 is arranged between the fourth resonator 4 and the fifth resonator 5, a third grounding rod 12 connected with the metal shielding layer 16 is arranged between the sixth resonator 6 and the seventh resonator 7, and coupling polarity is reversed when the first grounding rod 11, the second grounding rod 17 and the third grounding rod 12 are grounded, so that inductive coupling is realized.

One side of the first resonator 1, the second resonator 2, the third resonator 3, and the fourth resonator 4 is provided with a first flying bar 9 to form a first CQ structure, one side of the fifth resonator 5, the sixth resonator 6, the seventh resonator 7, and the eighth resonator 8 is provided with a second flying bar 10 to form a second CQ structure, and the opposite side of the first CQ structure and the second CQ structure from the side where the first flying bar 9 and the second flying bar 10 are provided is provided with a balance flying bar 15.

Furthermore, metal shielding layers 16 are arranged on the periphery and the lower surface of the dielectric substrate, connection areas corresponding to the signal input port 13 and the signal output port 14 are formed in the metal shielding layers 16, the signal input port 13 and the signal output port 14 extend to the connection areas, and the dielectric substrate is made of a dielectric ceramic material in the embodiment.

The parallel coaxial resonators are arranged on the dielectric substrate in a row, coupling among the resonators is realized through the coupling structure, two CQ structures are formed through the first flying rod 9 and the second flying rod 10, and meanwhile, the position and the strength of a zero point on the left side of the filter can be accurately controlled by adjusting the length and the position of the balance flying rod 15, so that zero point controllable symmetry is realized, the high suppression requirement of the filter is met, and the size of the filter can be further reduced.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A miniaturized dielectric filter for 5G communications, comprising: the resonator comprises a dielectric substrate, wherein a signal input port and a signal output port are arranged on the upper surface of the dielectric substrate, a first resonator, a second resonator, a third resonator, a fourth resonator, a fifth resonator, a sixth resonator, a seventh resonator and an eighth resonator are sequentially arranged between the signal input port and the signal output port, capacitive coupling is adopted between the first resonator and the second resonator, between the third resonator and the fourth resonator, between the fifth resonator and the sixth resonator and between the seventh resonator and the eighth resonator, inductive coupling is adopted between the second resonator and the third resonator, between the fourth resonator and the fifth resonator and between the sixth resonator and the seventh resonator, and the first resonator, the second resonator, the seventh resonator and the eighth resonator are all inductively coupled, And a first flying rod is arranged on one side of the third resonator and one side of the fourth resonator to form a first CQ structure, a second flying rod is arranged on one side of the fifth resonator, the sixth resonator, the seventh resonator and the eighth resonator to form a second CQ structure, and a balance flying rod is arranged on the side, opposite to the side where the first flying rod and the second flying rod are arranged, of the first CQ structure and the second CQ structure.

2. The miniaturized dielectric filter for 5G communication according to claim 1, wherein metal shielding layers are disposed on the periphery and the lower surface of the dielectric substrate.

3. A miniaturized dielectric filter for 5G communication according to claim 2, characterized in that said first, second, third, fourth, fifth, sixth, seventh and eighth resonators are formed by coaxial through holes opened in parallel metal sheets.

4. The miniaturized dielectric filter for 5G communication according to claim 2 or 3, wherein a connection area corresponding to the signal input port and the signal output port is formed on the metal shielding layer, and the signal input port and the signal output port extend to the connection area.

5. The miniaturized dielectric filter for 5G communication according to claim 4, wherein a first ground rod connected to the metal shielding layer is disposed between the second resonator and the third resonator, a second ground rod connected to the metal shielding layer is disposed between the fourth resonator and the fifth resonator, and a third ground rod connected to the metal shielding layer is disposed between the sixth resonator and the seventh resonator.

6. The miniaturized dielectric filter for 5G communication of claim 1, wherein the dielectric substrate is made of a dielectric ceramic material.