CN219477000U

CN219477000U - Compact dielectric resonator antenna module

Info

Publication number: CN219477000U
Application number: CN202320294860.5U
Authority: CN
Inventors: 赵伟; 谢昱乾
Original assignee: Shenzhen Sunway Communication Co Ltd
Current assignee: Shenzhen Sunway Communication Co Ltd
Priority date: 2023-02-14
Filing date: 2023-02-14
Publication date: 2023-08-04
Anticipated expiration: 2033-02-14

Abstract

The utility model discloses a compact dielectric resonator antenna module, which comprises a substrate assembly and a dielectric resonator arranged on the substrate assembly, wherein the dielectric resonator comprises a connecting part and four isosceles trapezoid columns, the height of the connecting part is smaller than that of the isosceles trapezoid columns, the four isosceles trapezoid columns are uniformly distributed around the connecting part, the short bottom surface of the isosceles trapezoid column is connected with the connecting part, the long bottom surface of the isosceles trapezoid column is provided with a compensation part extending towards the direction far away from the connecting part, and the connecting part, the isosceles trapezoid column and the compensation part are of an integrated structure which is integrally processed and formed. The dielectric resonator antenna module has compact structure and small whole volume; the dielectric resonator is only required to be integrally installed once, so that the alignment error generated in the installation process is reduced, and the performance of the antenna is guaranteed; the height difference formed by the connecting part and the isosceles trapezoid column in the height direction achieves a decoupling effect to a certain extent, so that the coupling between the isosceles trapezoid columns is reduced; the dielectric resonator antenna module can cover the N258 frequency band in 5G.

Description

Compact dielectric resonator antenna module

Technical Field

The utility model relates to the technical field of antennas, in particular to a compact dielectric resonator antenna module.

Background

As a research and development focus in the global industry, developing 5G technology and developing 5G standards have become industry consensus. The international telecommunications union ITU defines three main application scenarios of 5G in the 22 nd conference of ITU-RWP5D held in month 6 of 2015: enhanced mobile broadband, large-scale machine communication, high reliability and low latency communication. The 3 application scenes respectively correspond to different key indexes, wherein the peak speed of the user in the enhanced mobile bandwidth scene is 20Gbps, and the minimum user experience rate is 100Mbps. The unique characteristics of high carrier frequency and large bandwidth of millimeter waves are a main means for realizing the 5G ultra-high data transmission rate. In addition, the space reserved for the 5G antenna in the future mobile phone is small, and the optional positions are not more, so that a miniaturized antenna module is designed.

The dielectric resonator antenna formed by the ceramic body has the advantages of high processing precision, small volume in millimeter wave frequency band, lower cost and great advantages. The millimeter wave antenna of the 5G terminal of the conventional design generally has 1×4 units, if the design is adopted in a DRA (dielectric resonator antenna ) mode, 4 discrete dielectric resonators are needed during installation, and 4 times of repetition are needed during bonding and fixing of the dielectric resonators, so that the simulation of the antenna performance and the actual error caused by the design mode are large, if the antenna is designed into a whole, the installation of 4 units is only needed once, uncertainty factors can be reduced, and the mass production is convenient, so that the four-unit integrated dielectric resonator antenna module is urgently required.

Disclosure of Invention

The technical problems solved by the utility model are as follows: a compact dielectric resonator antenna module is provided that is convenient for mass production.

In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a compact dielectric resonator antenna module, includes base plate subassembly and locates the dielectric resonator on the base plate subassembly, dielectric resonator includes connecting portion and four isosceles trapezoid post, the height of connecting portion is less than the height of isosceles trapezoid post, four isosceles trapezoid post encircles the connecting portion equipartition, the short bottom surface of isosceles trapezoid post is connected connecting portion, the long bottom surface of isosceles trapezoid post has the orientation and keeps away from the compensating portion that connecting portion direction extends, connecting portion, isosceles trapezoid post and compensating portion are integrated into one piece's structure.

Further, the top surface of the compensation part is coplanar with the top surface of the isosceles trapezoid column, the bottom surface of the compensation part is coplanar with the bottom surface of the isosceles trapezoid column, and the surface of the compensation part away from the short bottom surface is a cambered surface.

Further, the substrate assembly comprises a dielectric substrate, a stratum and a microstrip matching line, the stratum is arranged on the top surface of the dielectric substrate, the dielectric resonator is arranged on the stratum, the stratum is provided with a coupling gap, the coupling gap is arranged corresponding to the isosceles trapezoid column, the microstrip matching line is arranged on the bottom surface of the dielectric substrate, and the microstrip matching line is used for feeding the isosceles trapezoid column.

Further, the substrate assembly further comprises a chip assembly, and the chip assembly is arranged on the bottom surface of the dielectric substrate and is electrically connected with the microstrip matching line.

Further, the coupling slit is triangular.

Further, a decoupling structure is arranged on the dielectric resonator.

Further, the decoupling structure comprises a metal column arranged in the center of the connecting portion, and the connecting portion is provided with a hole matched with the metal column.

Further, the decoupling structure further includes a first metal portion provided on a short bottom surface of the isosceles trapezoid pillar.

Further, the decoupling structure further includes a second metal portion disposed on an outer wall of the connection portion.

Further, a groove is formed in the outer wall of the connecting portion, and the second metal portion is located in the groove.

The utility model has the beneficial effects that: the dielectric resonator antenna module has compact structure and small whole volume; the four dielectric resonator units are integrated, so that the dielectric resonator is only required to be integrally installed once, the alignment error generated in the installation process of the dielectric resonator units is greatly reduced, and the antenna performance of the dielectric resonator antenna module is guaranteed; the height difference formed by the connecting part and the isosceles trapezoid column in the height direction achieves a decoupling effect to a certain extent, so that the coupling between the isosceles trapezoid columns is reduced; the dielectric resonator antenna module can cover the N258 frequency band in 5G.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a compact dielectric resonator antenna module according to a first embodiment of the present utility model;

fig. 2 is a top view of a compact dielectric resonator antenna module according to a first embodiment of the present utility model;

FIG. 3 is an enlarged view of FIG. 2 at A;

fig. 4 is a schematic structural diagram of another view angle of a compact dielectric resonator antenna module according to an embodiment of the utility model;

fig. 5 is a schematic structural diagram of a stratum in a compact dielectric resonator antenna module according to a first embodiment of the present utility model;

fig. 6 is an S-parameter diagram of a compact dielectric resonator antenna module according to a first embodiment of the present utility model.

Reference numerals illustrate:

1. a dielectric substrate;

2. a formation; 21. a coupling slit;

3. microstrip match lines;

4. a chip assembly;

5. a dielectric resonator; 51. a connection part; 511. a first column; 512. a second column; 513. a slot; 52. isosceles trapezoid columns; 53. a compensation unit;

61. a metal column; 62. a first metal part; 63. a second metal portion.

Detailed Description

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, in the embodiment of the present utility model, directional indications such as up, down, left, right, front, and rear … … are referred to, and the directional indication is merely used to explain the relative positional relationship, movement conditions, and the like between the components in a specific posture such as that shown in the drawings, and if the specific posture is changed, the directional indication is changed accordingly.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.

In addition, if the meaning of "and/or" is presented throughout this document to include three parallel schemes, taking "and/or" as an example, including a scheme, or a scheme that is satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

Example 1

Referring to fig. 1 to 6, a first embodiment of the present utility model is as follows: please combine fig. 1 and 4, the compact dielectric resonator antenna module includes a substrate assembly and a dielectric resonator 5 disposed on the substrate assembly, the substrate assembly includes a dielectric substrate 1, a ground layer 2, a microstrip match line 3 and a chip assembly 4, the microstrip match line 3 and the chip assembly 4 are disposed on the bottom surface of the dielectric substrate 1, the chip assembly 4 is electrically connected with the microstrip match line 3, the ground layer 2 is disposed on the top surface of the dielectric substrate 1, and the dielectric resonator 5 is disposed on the ground layer 2. The chip assembly 4 comprises a radio frequency chip, and optionally, the chip assembly 4 and the microstrip matching line 3 are electrically connected through a BGA solder ball.

Referring to fig. 1 to 3, the dielectric resonator 5 includes a connecting portion 51 and four isosceles trapezoid pillars 52, the four isosceles trapezoid pillars 52 have the same size, the height of the connecting portion 51 is smaller than that of the isosceles trapezoid pillars 52, the four isosceles trapezoid pillars 52 are uniformly distributed around the connecting portion 51, the short bottom surface of the isosceles trapezoid pillar 52 is connected with the connecting portion 51, the long bottom surface of the isosceles trapezoid pillar 52 has a compensating portion 53 extending towards a direction away from the connecting portion 51, and the connecting portion 51, the isosceles trapezoid pillar 52 and the compensating portion 53 are integrally formed. The short bottom surface of the isosceles trapezoid pillar 52 refers to a surface where a short bottom edge of a cross section (the cross section is an isosceles trapezoid) of the isosceles trapezoid pillar 52 is located, the short bottom surface is perpendicular to the stratum 2, and similarly, the long bottom surface of the isosceles trapezoid pillar 52 refers to a surface where a long bottom edge of a cross section (the cross section is an isosceles trapezoid) of the isosceles trapezoid pillar 52 is located, and the long bottom surface is perpendicular to the stratum 2. The four isosceles trapezoid columns 52 are uniformly distributed around the central axis of the connecting portion 51 at intervals of 90 degrees, which is equivalent to forming a 2×2 array package antenna module, and the antenna module is more compact in structure, and compared with a 1×4 linear array in the prior art, the antenna module not only can obtain higher gain, but also has the advantage of low profile.

In this embodiment, the top surface of the compensation portion 53 is coplanar with the top surface of the isosceles trapezoid pillar 52, the bottom surface of the compensation portion 53 is coplanar with the bottom surface of the isosceles trapezoid pillar 52, and the surface of the compensation portion 53 away from the short bottom surface is a cambered surface, that is, the isosceles trapezoid pillar 52 looks like a sector due to the existence of the compensation portion 53.

Referring to fig. 1, 4 and 5, the ground layer 2 has a coupling slot 21, the coupling slot 21 is disposed corresponding to the isosceles trapezoid pillar 52, the microstrip match line 3 is used to feed the isosceles trapezoid pillar 52, and it is understood that a partial area of the microstrip match line 3 corresponds to the coupling slot 21. In this embodiment, the coupling slit 21 has a triangular shape. Specifically, the number of the coupling slits 21 is four, the four coupling slits 21 are in one-to-one correspondence with the four isosceles trapezoid pillars 52, and preferably the coupling slits 21 are disposed corresponding to a central area of the bottom surface of the isosceles trapezoid pillar 52. The dielectric resonator 5 antenna module adopts a microstrip slot coupling feed mode, simplifies the manufacturing process, is beneficial to reducing the cost and is convenient for mass production.

Referring to fig. 2 to 4, specifically, the connection portion 51 includes a first column 511 located at the center of the four isosceles trapezoid columns 52 and a second column 512 protruding with respect to the bottom surface of the isosceles trapezoid column 52, the first column 511 is connected to the second column 512, the stratum 2 and the dielectric substrate 1 are respectively provided with a perforation through which the second column 512 passes, and an end of the second column 512 away from the first column 511 protrudes with respect to the bottom surface of the dielectric substrate 1. The outer wall of the first column 511 is connected with the isosceles trapezoid column 52, the top surface of the first column 511 is lower than the top surface of the isosceles trapezoid column 52, and the vacant area above the first column 511 achieves decoupling effect to a certain extent, so that the coupling between the isosceles trapezoid columns 52 is reduced.

Referring to fig. 1 to 3, in order to further improve the antenna performance of the compact dielectric resonator antenna module, the dielectric resonator 5 is provided with a decoupling structure.

In this embodiment, the decoupling structure includes a metal pillar 61 disposed in the center of the connection portion 51, a first metal portion 62 disposed on the short bottom surface of the isosceles trapezoid pillar 52, and a second metal portion 63 disposed on the outer wall of the connection portion 51, and the connection portion 51 has a hole adapted to the metal pillar 61. The first metal part 62 may be a metal sheet connected to the isosceles trapezoid pillar 52 or a metal layer deposited on the short bottom surface, and the second metal part 63 may be a metal sheet connected to the connection part 51 or a metal layer deposited on the outer wall of the connection part 51.

Preferably, the first metal part 62 entirely covers the area where the short bottom surface is not connected to the connection part 51; the second metal portion 63 is in contact with the formation 2.

The outer wall of the connecting portion 51 is provided with a groove 513, and the second metal portion 63 is located in the groove 513. In detail, the slot 513 is located on the outer wall of the first cylinder 511. The presence of the slot 513 allows the second metal portion 63 to better perform the decoupling effect.

Next, the following inventor's design ideas are explained:

four DRA antenna units in the shape of isosceles triangle column, the side length of the isosceles triangle section is 4.15mm 2.2mm, the height of the isosceles triangle column is 4mm, the material is ceramic, and the dielectric constant DK=10.

After the four DRA antenna unit arrays are integrated, the partial area in the middle of the hollowing is initially decoupled, a part of the partial area is reserved as a connecting part, and the connecting part is downwards prolonged, so that the connecting part is obtained, at the moment, the DRA antenna unit becomes an isosceles trapezoid column, and a compensation part is additionally arranged on the long bottom surface of the isosceles trapezoid column in order to compensate the medium loss caused by hollowing.

And the decoupling structure is arranged on the integrated dielectric resonator.

Fig. 6 shows S parameters of a compact dielectric resonator antenna module designed according to the design concept, and it can be found from the figure that the compact dielectric resonator antenna module covers 21-28GHz and can be used for the 5G millimeter wave N258 frequency band.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims

1. The utility model provides a compact dielectric resonator antenna module, includes base plate subassembly and locates the dielectric resonator on the base plate subassembly, its characterized in that: the dielectric resonator comprises a connecting part and four isosceles trapezoid columns, the height of the connecting part is smaller than that of the isosceles trapezoid columns, the four isosceles trapezoid columns encircle the connecting part and are uniformly distributed, the short bottom surfaces of the isosceles trapezoid columns are connected with the connecting part, the long bottom surfaces of the isosceles trapezoid columns are provided with compensation parts which extend towards the direction away from the connecting part, and the connecting part, the isosceles trapezoid columns and the compensation parts are of an integrated structure which is formed by integrally processing.

2. The compact dielectric resonator antenna module of claim 1, wherein: the top surface of the compensation part is coplanar with the top surface of the isosceles trapezoid column, the bottom surface of the compensation part is coplanar with the bottom surface of the isosceles trapezoid column, and the surface of the compensation part away from the short bottom surface is an arc surface.

3. The compact dielectric resonator antenna module of claim 1, wherein: the substrate assembly comprises a dielectric substrate, a stratum and a microstrip matching line, wherein the stratum is arranged on the top surface of the dielectric substrate, the dielectric resonator is arranged on the stratum, the stratum is provided with a coupling gap, the coupling gap is arranged corresponding to the isosceles trapezoid column, the microstrip matching line is arranged on the bottom surface of the dielectric substrate, and the microstrip matching line is used for feeding the isosceles trapezoid column.

4. A compact dielectric resonator antenna module according to claim 3, characterized in that: the substrate assembly further comprises a chip assembly, and the chip assembly is arranged on the bottom surface of the dielectric substrate and is electrically connected with the microstrip matching line.

5. A compact dielectric resonator antenna module according to claim 3, characterized in that: the coupling gap is triangular.

6. The compact dielectric resonator antenna module of claim 1, wherein: and a decoupling structure is arranged on the dielectric resonator.

7. The compact dielectric resonator antenna module of claim 6, wherein: the decoupling structure comprises a metal column arranged in the center of the connecting part, and the connecting part is provided with a hole matched with the metal column.

8. The compact dielectric resonator antenna module of claim 6, wherein: the decoupling structure further includes a first metal portion disposed on a short bottom surface of the isosceles trapezoid pillar.

9. The compact dielectric resonator antenna module of claim 6, wherein: the decoupling structure further comprises a second metal part arranged on the outer wall of the connecting part.

10. The compact dielectric resonator antenna module of claim 9, wherein: the outer wall of the connecting part is provided with a groove, and the second metal part is positioned in the groove.