CN212323170U

CN212323170U - Frequency and capacitive coupling double-modulation resonance structure

Info

Publication number: CN212323170U
Application number: CN202020105888.6U
Authority: CN
Inventors: 严格; 杨安岗; 秦伟; 陈建新; 赵俊; 王猛; 汪玮玺
Original assignee: Jiangsu Jiangjia Electronics Co ltd
Current assignee: Jiangsu Jiangjia Electronics Co ltd
Priority date: 2020-01-17
Filing date: 2020-01-17
Publication date: 2021-01-08
Anticipated expiration: 2030-01-17

Abstract

The utility model relates to a frequency and capacitive coupling bitonic resonance structure. The device comprises a body made of a solid dielectric material, wherein the body is provided with a blind slot, and at least one blind slot is used for simultaneously debugging the resonant frequency and the capacitive coupling. The utility model provides a can realize resonant frequency and capacitive coupling double-tuning structure simultaneously through single blind groove, the later stage debugging of being convenient for, it is effective to prove to be expert at, possesses fine performance.

Description

Frequency and capacitive coupling double-modulation resonance structure

Technical Field

The utility model relates to a communication equipment subassembly technical field especially relates to a frequency and two tuning structures of capacitive coupling for dielectric waveguide filter.

Background

The dielectric waveguide filter is the mainstream choice of the filter element in the domestic 5G and future mobile communication base stations. The dielectric waveguide filter is mainly composed of a plurality of solid dielectric resonators, and achieves filtering performance through coupling before the resonators. Generally, each dielectric resonator can be tuned by a frequency tuning blind hole thereon, and the coupling between the resonators can be tuned by arranging a coupling window between the two resonators or a coupling tuning blind hole, wherein the coupling window realizes inductive coupling and the coupling tuning blind hole realizes capacitive coupling. The introduction of the capacitive coupling can realize transmission zero points on two sides of the filter passband, thereby improving the selectivity of the filter on the premise of not increasing the size of the filter. At present, a capacitive coupling tuning blind hole and a frequency tuning blind hole are independently arranged, the size of the holes is small, later-stage debugging is not convenient, and the production efficiency is limited to a certain extent.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned defect, aim at provides a bitonic resonance structure convenient to later stage frequency and capacitive coupling debugging.

Therefore, the utility model adopts the technical scheme that: a frequency and capacitance coupling dual-modulation resonance structure comprises a body made of a solid dielectric material, wherein a blind slot is formed in the body, and at least one blind slot is used for simultaneously modulating resonance frequency and capacitance coupling.

Furthermore, the blind slot for simultaneously debugging the resonant frequency and the capacitive coupling is an L-shaped blind slot.

Furthermore, the debugging of the resonant frequency and the capacitive coupling is realized by adjusting the depth of the L-shaped blind groove and the length of two arms of the L-shaped blind groove.

The dielectric waveguide resonant structure is combined with a dielectric waveguide resonator with a debugging blind hole to form the resonant frequency and capacitive coupling double-tuning structure.

Further, a dielectric waveguide filter comprising the structure is formed, wherein the dielectric waveguide filter comprises a plurality of feed structures, and each feed structure consists of a coupling slot and a feed cylinder;

the dielectric waveguide filter comprises at least one resonant frequency and capacitance coupling double-tuning structure, and the dielectric waveguide filter further comprises a conducting layer which is arranged on the surface of a main body of the dielectric filter, the surface of a debugging blind hole and the surface of an L-shaped blind groove.

Furthermore, the surfaces of the debugging blind hole and the L-shaped blind groove can be completely metalized or partially metalized.

The utility model has the advantages that: the utility model provides a can realize resonant frequency and capacitive coupling double-tuned structure simultaneously and contain the dielectric waveguide filter of this structure through single blind groove, the later stage debugging of being convenient for, it is effective to prove to be expert at, possesses fine performance.

Drawings

Fig. 1 is a three-dimensional schematic diagram of the dielectric waveguide resonator of the etching blind slot of the present invention. Fig. 2 is a top view of fig. 1.

Fig. 3 is a graph of the resonant frequency of a dielectric waveguide resonator with a blind etched slot.

Fig. 4 is a three-dimensional schematic diagram of a frequency and coupling double tuning structure.

Fig. 5 is a top view of a frequency and coupling double tuning structure.

Fig. 6 is a graph of the coupling coefficient for a frequency and coupling double tuned configuration.

Fig. 7 is a schematic diagram showing an example of a dielectric waveguide filter design to which a frequency and coupling double tuning structure is applied.

Fig. 8 is a simulation result of an example of a dielectric waveguide filter design to which a frequency and coupling double tuning structure is applied.

Detailed Description

A frequency and capacitance coupling dual-modulation resonance structure comprises a body made of a solid dielectric material, wherein a blind slot is formed in the body, and at least one blind slot is used for simultaneously modulating resonance frequency and capacitance coupling.

The following is a further explanation of the present invention to better understand the present invention: the utility model provides a dielectric waveguide resonator structure of surface etching L type (but not limited to L type) blind groove, as shown in fig. 1 and fig. 2. The dielectric waveguide resonator comprises a body made of a solid dielectric material and an L-shaped blind groove positioned on the surface of the body, wherein the surfaces of the dielectric waveguide resonator and the L-shaped blind groove are metalized; the L-shaped blind slot can be used for debugging the resonant frequency of the dielectric resonator. FIG. 3 shows the resonant frequency of the dielectric waveguide resonator and the depth of the L-shaped blind slotHAnd length of one arml ₁Graph of the relationship between; it can be seen that the resonant frequency of the dielectric waveguide resonance can be controlled by the depth of the L-shaped blind slot and the arm length.

The utility model combines the dielectric waveguide resonator with etched L-shaped blind slot with the traditional dielectric waveguide resonator with debugging blind hole, and the utility model provides a frequency and capacitance coupling double-tuning structure as shown in figures 4 and 5; the structure is composed ofThe dielectric waveguide filter (resonator 1) with a debugging blind hole on the surface, the dielectric waveguide resonator (resonator 2) with an L-shaped blind groove etched on the upper surface and a coupling window between the dielectric waveguide filter and the resonator; the debugging blind hole, the resonator, the L-shaped blind slot, the resonator and the coupling window are metalized on the surface; FIG. 4 shows the coupling coefficient between the resonator and the depth of the L-shaped blind slotHAnd length of the coupling windowl ₂Graph of the relationship between; the coupling is negative, representing capacitive coupling; the absolute value of the coupling is increased along with the increase of the depth of the L-shaped blind groove; the absolute value of the coupling decreases as the length of the coupling window increases, which further demonstrates that the coupling is a capacitive coupling.

It can be seen that the utility model provides a frequency and capacitive coupling double tuning structure can realize resonant frequency and capacitive coupling coefficient's double tuning function, especially L type groove is big than the harmonious blind hole of tradition, the later stage debugging of being convenient for.

In the following, an example of the design of the dielectric waveguide filter will be given by using the above frequency and capacitive coupling double-tuning structure, and a clear and complete description will be made on the technical scheme thereof.

The utility model provides a dielectric filter for example is shown in FIG. 7: the dielectric filter comprises two feed structures, wherein each feed structure consists of a coupling slot and a feed cylinder, the coupling slot 1 and the feed cylinder 1 in the figure 5 form one feed structure, and the coupling slot 2 and the feed cylinder 2 form the other feed structure; the dielectric filter further comprises at least one frequency and capacitive coupling double tuning structure of fig. 5 and 6; the dielectric filter also comprises conducting layers on the surface of the dielectric filter body, the surface of the debugging blind hole and the surface of the L-shaped blind groove, wherein the debugging blind hole and the surface of the L-shaped blind groove can be completely metalized or partially metalized. Specifically, the depth of a debugging blind hole, the depth and the arm length of an L-shaped blind groove and the length of a coupling window in the frequency and capacitance coupling double-tuning structure can be designed according to actual requirements, such as the central frequency of a filter passband and the frequency of a transmission zero point. Generally, one frequency and capacitance coupling double-tuning structure can realize two transmission points, and if the number of transmission zero points needs to be increased, the number of the frequency and capacitance coupling double-tuning structures in the dielectric filter can be increased.

Fig. 8 shows simulation results of the dielectric filter design example provided by the present invention. It can be seen that, this dielectric filter's filtering passband has introduced a transmission zero respectively from 3400MHz to 3600MHz on both sides near the passband, has verified the utility model provides a feasibility and the practicality of the first implementation of double-blind hole capacitive coupling.

Claims

1. A frequency and capacitance coupling dual-modulation resonance structure is characterized by comprising a body made of a solid dielectric material, wherein a blind slot is formed in the body, and at least one blind slot is used for simultaneously modulating resonance frequency and capacitance coupling.

2. A frequency and capacitive coupling double tuned resonant structure according to claim 1, wherein the blind slots for simultaneously tuning the resonant frequency and capacitive coupling are L-shaped blind slots.

3. The structure of claim 2, wherein the tuning of the resonant frequency and the capacitive coupling is achieved by adjusting the depth of the L-shaped blind slot and the length of the two arms of the L-shaped blind slot.