CN115966898A

CN115966898A - Novel DRA millimeter wave antenna

Info

Publication number: CN115966898A
Application number: CN202310165725.5A
Authority: CN
Inventors: 赵伟; 谢昱乾
Original assignee: Shenzhen Sunway Communication Co Ltd
Current assignee: Shenzhen Sunway Communication Co Ltd
Priority date: 2023-02-16
Filing date: 2023-02-16
Publication date: 2023-04-14

Abstract

The invention discloses a novel DRA millimeter wave antenna which comprises a substrate assembly and a dielectric resonator arranged on the substrate assembly, wherein the dielectric resonator is rectangular, the top surface of the substrate assembly is provided with a feed patch, a first feed metal piece and a second feed metal piece, the bottom surface of the dielectric resonator is attached to the feed patch, the front side and the rear side of the dielectric resonator are respectively provided with the first feed metal piece, the left side and the right side of the dielectric resonator are respectively provided with the second feed metal piece, the first feed metal piece and the second feed metal piece are both contacted with the dielectric resonator, and a first matching balun structure connected with the first feed metal piece and a second matching balun structure connected with the second feed metal piece are arranged in the substrate assembly. The DRA millimeter wave antenna has the advantages of novel structure and low section, can cover N257 and N258 frequency bands, can realize installation-free integration with a substrate assembly through the first feed metal part and the second feed metal part, reduces the positioning difficulty of the dielectric resonator, and is convenient for assembly and production.

Description

Novel DRA millimeter wave antenna

Technical Field

The invention relates to the technical field of antennas, in particular to a novel DRA millimeter wave antenna.

Background

5G is the focus of research and development in the global industry, and it has become common knowledge in the industry to develop 5G technology and establish the 5G standard. The international telecommunications union ITU identified three major application scenarios for 5G at ITU-RWP5D meeting No. 22 held 6 months 2015: enhanced mobile broadband, large-scale machine communication, high-reliability and low-delay communication. The 3 application scenes correspond to different key indexes respectively, wherein the peak speed of a user in the enhanced mobile bandwidth scene is 20Gbps, and the lowest user experience rate is 100Mbps. The unique high carrier frequency and large bandwidth characteristics of millimeter waves are the main means for realizing 5G ultrahigh data transmission rate.

The space reserved for the 5G antenna in the future mobile phone is small, and the number of selectable positions is small. A Dielectric Resonator Antenna (DRA) is an antenna excellent in performance and can be used for a mobile terminal of 5G millimeter waves.

The standard dielectric resonator is in the shape of a discrete cuboid, a cylinder, a sphere and the like, but in order to meet the requirement of 5G bandwidth, in the prior art, the section of the dielectric resonator is higher no matter which shape is adopted, so that the dielectric resonator is not beneficial to being placed in a real machine environment.

Disclosure of Invention

The invention mainly aims to provide a novel DRA millimeter wave antenna, and aims to solve the problem that the conventional DRA millimeter wave antenna is high in section.

In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a novel DRA millimeter wave antenna, includes the base plate subassembly and locates dielectric resonator on the base plate subassembly, dielectric resonator is the cuboid form, the top surface of base plate subassembly is equipped with feed paster, first feed metalwork and second feed metalwork, dielectric resonator's bottom surface paste in on the feed paster, dielectric resonator's front side and rear side are equipped with respectively first feed metalwork, dielectric resonator's left side and right side are equipped with respectively second feed metalwork, first feed metalwork reach second feed metalwork all with the dielectric resonator contact, be equipped with in the base plate subassembly and connect the first matching balun structure of first feed metalwork and connect the second matching balun structure of second feed metalwork.

The invention has the beneficial effects that:

the DRA millimeter wave antenna has a novel structure, and the height of the dielectric resonator can be made lower under the same performance index, so that the section of the DRA millimeter wave antenna is effectively reduced, and the DRA millimeter wave antenna is particularly suitable for handheld equipment of a 5G millimeter wave communication system;

the feed of the balun differential structure is adopted, the antenna phase bandwidth is wider, the N257 (26.5-29.5 GHz) and N258 (24.25-27.25 GHz) frequency bands can be covered, and the DRA millimeter wave antenna also has the advantages of low cross polarization and strong anti-interference capability.

In addition, the dielectric resonator in the DRA millimeter wave antenna can be integrated with the substrate assembly without installation (namely, glue is not needed to be used for bonding with the substrate assembly) through the first feeding metal part and the second feeding metal part, so that the positioning difficulty of the dielectric resonator is reduced, and the DRA millimeter wave antenna is easier to assemble and produce.

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 structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a novel DRA millimeter wave antenna according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of another view angle of the novel DRA millimeter wave antenna according to the first embodiment of the present invention;

fig. 3 is a schematic structural diagram of a partial structure of a novel DRA millimeter wave antenna according to a first embodiment of the present invention;

fig. 4 is a first schematic diagram illustrating an internal structure of a substrate assembly of the novel DRA millimeter wave antenna according to a first embodiment of the present invention;

fig. 5 is a second schematic diagram illustrating an internal structure of a substrate assembly of the novel DRA millimeter wave antenna according to the first embodiment of the present invention;

fig. 6 is a comparison diagram of S parameters of the novel DRA millimeter wave antenna in different polarization states according to the first embodiment of the present invention;

fig. 7 is an equivalent S parameter diagram of the novel DRA millimeter wave antenna according to the first embodiment of the present invention.

The reference numbers illustrate:

1. a substrate assembly; 11. a first earth formation; 12. a second earth formation; 13. a third earth formation; 14. a first dielectric layer; 15. a sixth dielectric layer; 16. a first pad; 17. a second pad;

2. a dielectric resonator; 21. a first hole; 22. a second hole;

3. feeding a patch;

4. a first feeding metal piece;

5. a second feeding metal piece;

6. a first matching balun structure; 61. a first microstrip line; 62. a second microstrip line; 63. a third microstrip line; 64. a fourth microstrip line; 65. a fifth microstrip line; 66. a sixth microstrip line; 67. a seventh microstrip line;

7. a second matching balun structure;

81. a first polarized coaxial feed column; 82. a second polarized coaxial feed column; 83. a third polarized coaxial feed column;

9. a grounded metal post; 91. a recessed portion.

Detailed Description

The objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.

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.

It should be noted that, if the present invention relates to directional indications such as up, down, left, right, front and back 823082308230, 8230, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture as shown in the drawings, and if the specific posture is changed, the directional indications are changed accordingly.

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

In addition, if appearing throughout the text, "and/or" is meant to include three juxtaposed aspects, such as "and/or" includes aspects, or aspects that are satisfied simultaneously. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and encompass, for example, both fixed and removable connections or integral parts thereof; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

Example one

Referring to fig. 1 to 7, a first embodiment of the present invention is: a novel DRA millimeter wave antenna can be applied to handheld devices of 5G millimeter wave communication such as mobile phones, tablet computers and smart watches.

As shown in fig. 1 to 5, the DRA millimeter wave antenna includes a substrate assembly 1 and a dielectric resonator 2 disposed on the substrate assembly 1, the dielectric resonator 2 is rectangular, a feeding patch 3, a first feeding metal part 4 and a second feeding metal part 5 are disposed on a top surface of the substrate assembly 1, a bottom surface of the dielectric resonator 2 is attached to the feeding patch 3, the first feeding metal part 4 is disposed on a front side and a rear side of the dielectric resonator 2, the second feeding metal part 5 is disposed on a left side and a right side of the dielectric resonator 2, the first feeding metal part 4 and the second feeding metal part 5 are both in contact with the dielectric resonator 2, and a first matching balun structure 6 connected to the first feeding metal part 4 and a second matching balun structure 7 connected to the second feeding metal part 5 are disposed in the substrate assembly 1. In this embodiment, the dielectric resonator 2 has a length of 6mm, a width of 4.8mm, and a height of 3mm.

The first feeding metal piece 4 is used for enabling the DRA millimeter wave antenna to generate a first polarization, the second feeding metal piece 5 is used for enabling the DRA millimeter wave antenna to generate a second polarization, and the feeding patch 3 is used for enabling the DRA millimeter wave antenna to generate a third polarization.

Referring to fig. 1 and fig. 3, a first bonding pad 16 and a second bonding pad 17 are further disposed on the top surface of the substrate assembly 1, and the first feeding metal part 4 is soldered on the first bonding pad 16 and connected to the first matching balun structure 6 through the first bonding pad 16; the second feeding metal piece 5 is welded on the second bonding pad 17 and connected with the second matching balun structure 7 through the second bonding pad 17.

In this embodiment, the first feeding metal part 4 is L-shaped, one end of the first feeding metal part 4 is welded to the first pad 16, and the other end of the second feeding metal part 5 is in contact with the dielectric resonator 2. Similarly, the second feeding metal part 5 may also be L-shaped.

As shown in fig. 1, in order to make the first feeding metal piece 4 and the second feeding metal piece 5 fix the dielectric resonator 2 better, a first hole 21 for inserting a partial region of the first feeding metal piece 4 and a second hole 22 for inserting a partial region of the second feeding metal piece 5 are provided on the dielectric resonator 2, that is, one end of the first feeding metal piece 4 away from the first pad 16 is inserted into the first hole 21, and one end of the second feeding metal piece 5 away from the second pad 17 is inserted into the second hole 22; preferably, two of the first feeding metal pieces 4 are oppositely disposed, and two of the second feeding metal pieces 5 are oppositely disposed. In this embodiment, the outer wall of the first feeding metal part 4 contacts the inner wall of the first hole 21; the outer wall of the second feeding metal piece 5 is in contact with the inner wall of the second hole 22; the diameters of the first hole 21 and the second hole 22 are 0.3mm respectively, and the depths thereof are 0.8mm respectively. In other embodiments, the end face of the first feeding metal piece 4/the end face of the second feeding metal piece 5 may contact the dielectric resonator 2.

Preferably, the diameter of the first hole 21 is the same as or slightly larger than the diameter of the end of the first feeding metal part 4 far from the first pad 16, so as to facilitate the assembly of the first feeding metal part 4 and the dielectric resonator 2 and to form a larger contact area between the first feeding metal part 4 and the dielectric resonator 2. Similarly, the second hole 22 and the second feeding metal piece 5 are also provided.

In order to facilitate the processing and manufacturing of the first feeding metal part 4/the second feeding metal part 5 and reduce the weight of the DRA millimeter wave antenna, the first feeding metal part 4 comprises a first plastic body and a first metal layer at least covering the peripheral wall of the first plastic body, and the first plastic body is in an L shape. The first metal layer may be formed on the first plastic body through a film coating process (in this case, the first metal layer is equivalent to a skin of the first plastic body), or may be directly plated on the first plastic body. In the same way, preferably, the first feeding metal part 4 includes a second plastic body and a second metal layer at least covering the outer peripheral wall of the second plastic body. In other embodiments, the first metal layer may also completely cover the first plastic body, that is, the end surface of the first plastic body is also covered with the first metal layer.

With reference to fig. 2 to fig. 5, a first polarized coaxial feeding column 81, a second polarized coaxial feeding column 82 and a third polarized coaxial feeding column 83 are further disposed on the bottom surface of the substrate assembly 1, the first polarized coaxial feeding column 81 is connected to the first matching balun structure 6, the second polarized coaxial feeding column 82 is connected to the second matching balun structure 7, and the third polarized coaxial feeding column 83 is connected to the feeding patch 3.

Referring to fig. 2, 4 and 5, the substrate assembly 1 includes a first ground layer 11, a second ground layer 12 and a third ground layer 13 sequentially arranged from top to bottom, the first matching balun structure 6 is located between the first ground layer 11 and the second ground layer 12, and the second matching balun structure 7 is located between the second ground layer 12 and the third ground layer 13. The first matching balun structure 6 is located between the first ground layer 11 and the second ground layer 12, and the second matching balun structure 7 is located between the second ground layer 12 and the third ground layer 13, so that coupling between the first matching balun structure 6 and the second matching balun structure 7 can be effectively reduced, external signal interference can be reduced, and performance of the DRA millimeter wave antenna can be guaranteed.

Specifically, the substrate assembly 1 further includes a first dielectric layer 14, a second dielectric layer, a third dielectric layer, a fourth dielectric layer, a fifth dielectric layer, and a sixth dielectric layer 15, the first dielectric layer 14 is disposed on the top surface of the first ground layer 11, and the feeding patch 3, the first pad 16, and the second pad 17 are respectively disposed on the top surface of the first dielectric layer 14; the second dielectric layer is connected with the bottom surface of the first stratum 11, the third dielectric layer is connected with the top surface of the second stratum 12, and the first matching balun structure 6 is arranged between the second dielectric layer and the third dielectric layer; the fourth dielectric layer is connected with the bottom surface of the second stratum 12, the fifth dielectric layer is connected with the top surface of the third stratum 13, and the second matching balun structure 7 is arranged between the fourth dielectric layer and the fifth dielectric layer; the sixth dielectric layer 15 is disposed on the bottom surface of the third ground layer 13, and the first polarization coaxial feed column 81, the second polarization coaxial feed column 82, and the third polarization coaxial feed column 83 are exposed from the bottom surface of the sixth dielectric layer 15.

Preferably, a plurality of grounding metal posts 9 are disposed in the substrate assembly 1, the grounding metal posts 9 are respectively connected to the first ground layer 11, the second ground layer 12 and the third ground layer 13, three recesses 91 are defined by the plurality of grounding metal posts 9, and the first polarization coaxial feeding post 81, the second polarization coaxial feeding post 82 and the third polarization coaxial feeding post 83 are respectively located in the different recesses 91.

As shown in fig. 4, the first matching balun structure 6 further includes a first microstrip line 61, a second microstrip line 62, a third microstrip line 63, a fourth microstrip line 64, a fifth microstrip line 65, a sixth microstrip line 66 and a seventh microstrip line 67, one end of the first microstrip line 61 is connected and conducted with one of the first feeding metal parts 4, the other end of the first microstrip line 61 is connected with one end of the second microstrip line 62, the other end of the second microstrip line 62 is connected with one end of the third microstrip line 63, the other end of the third microstrip line 63 is connected with one end of the fourth microstrip line 64, one end of the fifth microstrip line 65 is connected with the middle region of the third microstrip line 63, the other end of the fifth microstrip line 65 is connected with the first polarization coaxial feeding post 81, and the fourth of the second microstrip line 62, the third microstrip line 63, the fourth microstrip line 64 and the fifth microstrip line 65 forms an E-shaped structure; the sixth microstrip line 66 is parallel to the fourth microstrip line 64, one end of the seventh microstrip line 67 is connected to one end of the sixth microstrip line 66, and the other end of the seventh microstrip line 67 is connected to the other first feeding metal part 4. Similarly, the second matching balun structure 7 may be configured in the same manner as the first matching balun structure 6.

The feed device further comprises a chip component (not shown in the figure) and a radio frequency switch (not shown in the figure), wherein the chip component is respectively connected with the first polarization coaxial feed column 81, the second polarization coaxial feed column 82 and the third polarization coaxial feed column 83 through the radio frequency switch.

Fig. 6 shows a S parameter comparison diagram of the DRA millimeter wave antenna of the present embodiment in different polarization modes; wherein, "polarization 1" is a curve of the DRA millimeter wave antenna in a first polarization mode, "polarization 2" is a curve of the DRA millimeter wave antenna in a second polarization mode, and "polarization 3" is a curve of the DRA millimeter wave antenna in a third polarization mode. As can be seen from FIG. 6, the DRA millimeter wave antenna basically covers the N257 (26.5 GHz-29.5 GHz) and N258 frequency bands (24.25-27.25 GHz) specified by 3 GPP.

After the DRA millimeter wave antenna is connected with the chip assembly and the radio frequency switch, the radio frequency switch is used for switching three polarizations, so that an S parameter diagram of the DRA millimeter wave antenna is equivalent to that in fig. 7, and as can be seen from fig. 7, the bandwidth of the DRA millimeter wave antenna covers 22-31Ghz, and the DRA millimeter wave antenna is a broadband antenna with excellent performance.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides a novel DRA millimeter wave antenna, includes the base plate subassembly and locates dielectric resonator on the base plate subassembly, dielectric resonator is the cuboid form, its characterized in that: the top surface of the substrate component is provided with a feed patch, a first feed metal part and a second feed metal part, the bottom surface of the dielectric resonator is attached to the feed patch, the front side and the rear side of the dielectric resonator are respectively provided with the first feed metal part, the left side and the right side of the dielectric resonator are respectively provided with the second feed metal part, the first feed metal part and the second feed metal part are both contacted with the dielectric resonator, and a first matching balun structure connected with the first feed metal part and a second matching balun structure connected with the second feed metal part are arranged in the substrate component.

2. The novel DRA millimeter-wave antenna of claim 1, characterized in that: the first feed metal part is L-shaped.

3. The novel DRA millimeter-wave antenna of claim 1, characterized in that: and the dielectric resonator is provided with a first hole for inserting a partial region of the first feeding metal piece and a second hole for inserting a partial region of the second feeding metal piece.

4. The novel DRA millimeter-wave antenna of claim 3, characterized in that: the outer wall of the first feeding metal piece is in contact with the inner wall of the first hole; the outer wall of the second feeding metal piece is in contact with the inner wall of the second hole.

5. The novel DRA millimeter-wave antenna of claim 1, characterized in that: the first feeding metal piece comprises a first plastic body and a first metal layer at least wrapping the peripheral wall of the first plastic body.

6. The novel DRA millimeter-wave antenna of claim 1, characterized in that: the bottom surface of the substrate assembly is provided with a first polarization coaxial feed column, a second polarization coaxial feed column and a third polarization coaxial feed column, the first polarization coaxial feed column is connected with the first matching balun structure, the second polarization coaxial feed column is connected with the second matching balun structure, and the third polarization coaxial feed column is connected with the feed patch.

7. The novel DRA millimeter-wave antenna of claim 6, wherein: the base plate subassembly is including first stratum, second stratum and the third stratum that from top to bottom sets gradually, first matching balun structure is located first stratum with between the second stratum, second matching balun structure is located between second stratum and the third stratum.

8. The novel DRA millimeter-wave antenna of claim 7, wherein: the substrate assembly further comprises a first dielectric layer, a second dielectric layer, a third dielectric layer, a fourth dielectric layer, a fifth dielectric layer and a sixth dielectric layer, the first dielectric layer is arranged on the top surface of the first stratum, the feeding patch is arranged on the top surface of the first dielectric layer, and the top surface of the first dielectric layer is further provided with a first bonding pad used for welding the first feeding metal piece and a second bonding pad used for welding the second feeding metal piece; the second dielectric layer is connected with the bottom surface of the first stratum, the third dielectric layer is connected with the top surface of the second stratum, and the first matching balun structure is arranged between the second dielectric layer and the third dielectric layer; the fourth dielectric layer is connected with the bottom surface of the second stratum, the fifth dielectric layer is connected with the top surface of the third stratum, and the second matching balun structure is arranged between the fourth dielectric layer and the fifth dielectric layer; the sixth dielectric layer is arranged on the bottom surface of the third ground layer, and the first polarization coaxial feed column, the second polarization coaxial feed column and the third polarization coaxial feed column are exposed out of the bottom surface of the sixth dielectric layer.

9. The novel DRA millimeter-wave antenna of claim 7, wherein: the substrate assembly is provided with a plurality of grounding metal columns, the grounding metal columns are respectively connected with the first stratum, the second stratum and the third stratum, the grounding metal columns in a plurality surround three concave parts, and the first polarization coaxial feed column, the second polarization coaxial feed column and the third polarization coaxial feed column are respectively located in different concave parts.

10. The novel DRA millimeter-wave antenna of claim 6, wherein: the first matching balun structure comprises a first microstrip line, a second microstrip line, a third microstrip line, a fourth microstrip line, a fifth microstrip line, a sixth microstrip line and a seventh microstrip line, one end of the first microstrip line is connected and conducted with the first feed metal piece, the other end of the first microstrip line is connected with one end of the second microstrip line, the other end of the second microstrip line is connected with one end of the third microstrip line, the other end of the third microstrip line is connected with one end of the fourth microstrip line, one end of the fifth microstrip line is connected with the middle area of the third microstrip line, the other end of the fifth microstrip line is connected with the first polarization coaxial feed column, and the fourth microstrip line, the third microstrip line, the fourth microstrip line and the fifth microstrip line form an E-shaped structure; the sixth microstrip line and the fourth microstrip line are arranged in parallel, one end of the seventh microstrip line is connected with one end of the sixth microstrip line, and the other end of the seventh microstrip line is connected and conducted with the other first feed metal piece.