A novel DRA millimeter wave antenna

Abstract

The application discloses a novel DRA millimeter wave antenna, which comprises a substrate assembly and a dielectric resonator arranged on the substrate assembly, the dielectric resonator is in the shape of a rectangular body, the top surface of the substrate assembly is provided with a feeding patch, a first feeding metal piece and a second feeding metal piece, the bottom surface of the dielectric resonator is attached to the feeding patch, the front side and the back side of the dielectric resonator are respectively provided with the first feeding metal piece, the left side and the right side of the dielectric resonator are respectively provided with the second feeding metal piece, the first feeding metal piece and the second feeding metal piece are in contact with the dielectric resonator, and the substrate assembly is internally provided with a first matching balun structure connected with the first feeding metal piece and a second matching balun structure connected with the second feeding metal piece. The DRA millimeter wave antenna has a novel structure, a low profile, can cover N257 and N258 frequency bands, can be integrated with the substrate assembly without installation through the first feeding metal piece and the second feeding metal piece, the positioning difficulty of the dielectric resonator is reduced, and assembly and production are facilitated.

Description

Technical Field

[0001] This invention relates to the field of antenna technology, and in particular to a novel DRA millimeter-wave antenna. Background Technology

[0002] As a global focus of research and development, 5G has become a consensus in the industry to develop 5G technology and formulate 5G standards. At the 22nd meeting of ITU-RWP5D in June 2015, the International Telecommunication Union (ITU) clarified three main application scenarios for 5G: enhanced mobile broadband, massive machine-type communications, and ultra-reliable low-latency communications. These three application scenarios correspond to different key indicators. In the enhanced mobile broadband scenario, the peak user speed is 20Gbps, and the minimum user experience rate is 100Mbps. The unique high carrier frequency and large bandwidth characteristics of millimeter waves are the main means to achieve the ultra-high data transmission rates of 5G.

[0003] Future mobile phones will have limited space for 5G antennas, leaving few options for placement. Dielectric resonator antennas (DRAs) are a high-performance antenna that can be used in 5G millimeter-wave mobile devices.

[0004] Standard dielectric resonators are discrete shapes such as cuboids, cylinders, and spheres. However, in order to meet the bandwidth requirements of 5G, the cross-section of dielectric resonators of any shape in the existing technology is relatively high, which is not conducive to their placement in a real-world environment. Summary of the Invention

[0005] The main objective of this invention is to propose a novel DRA millimeter-wave antenna, which aims to solve the problem of the high profile of existing DRA millimeter-wave antennas.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a novel DRA millimeter-wave antenna, comprising a substrate assembly and a dielectric resonator disposed on the substrate assembly. The dielectric resonator is rectangular in shape. The top surface of the substrate assembly is provided with a feed patch, a first feed metal component, and a second feed metal component. The bottom surface of the dielectric resonator is attached to the feed patch. The first feed metal component is disposed on the front and rear sides of the dielectric resonator, respectively. The second feed metal component is disposed on the left and right sides of the dielectric resonator, respectively. Both the first and second feed metal components are in contact with the dielectric resonator. The substrate assembly is provided with a first matching balun structure connecting the first feed metal component and a second matching balun structure connecting the second feed metal component.

[0007] The beneficial effects of this invention are as follows:

[0008] This DRA millimeter-wave antenna has a novel structure. Under the same performance specifications, the height of the dielectric resonator can be made lower, thereby effectively reducing the profile of the DRA millimeter-wave antenna, making it particularly suitable for handheld devices in 5G millimeter-wave communication systems.

[0009] The antenna employs a balun differential feeding structure, resulting in a wider antenna phase bandwidth that can cover the N257 (26.5-29.5GHz) and N258 (24.25-27.25GHz) frequency bands. This DRA millimeter-wave antenna also boasts advantages such as low cross-polarization and strong anti-interference capability.

[0010] In addition, the dielectric resonator in this DRA millimeter-wave antenna can be integrated with the substrate assembly without installation (i.e., no glue is needed to bond it to the substrate assembly) through the first feed metal part and the second feed metal part, which reduces the positioning difficulty of the dielectric resonator and makes the DRA millimeter-wave antenna easier to assemble and produce. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the structure of the novel DRA millimeter-wave antenna according to Embodiment 1 of the present invention;

[0013] Figure 2 This is a schematic diagram of the novel DRA millimeter-wave antenna from another perspective of Embodiment 1 of the present invention;

[0014] Figure 3 This is a schematic diagram of a portion of the structure of the novel DRA millimeter-wave antenna according to Embodiment 1 of the present invention;

[0015] Figure 4 This is a schematic diagram of the internal structure of the substrate assembly of the novel DRA millimeter-wave antenna according to Embodiment 1 of the present invention. Figure 1 ;

[0016] Figure 5 This is a schematic diagram of the internal structure of the substrate assembly of the novel DRA millimeter-wave antenna according to Embodiment 1 of the present invention. Figure 2 ;

[0017] Figure 6 This is a comparison diagram of the S-parameters of the novel DRA millimeter-wave antenna in different polarization states according to Embodiment 1 of the present invention;

[0018] Figure 7This is an equivalent S-parameter diagram of the novel DRA millimeter-wave antenna according to Embodiment 1 of the present invention.

[0019] Explanation of icon numbers:

[0020] 1. Substrate assembly; 11. First ground layer; 12. Second ground layer; 13. Third ground layer; 14. First dielectric layer; 15. Sixth dielectric layer; 16. First pad; 17. Second pad;

[0021] 2. Dielectric resonator; 21. First hole; 22. Second hole;

[0022] 3. Power supply patch;

[0023] 4. First power supply metal component;

[0024] 5. Second power supply metal component;

[0025] 6. First matched balun structure; 61. First microstrip line; 62. Second microstrip line; 63. Third microstrip line; 64. Fourth microstrip line; 65. Fifth microstrip line; 66. Sixth microstrip line; 67. Seventh microstrip line;

[0026] 7. Second matching balun structure;

[0027] 81. First polarization coaxial feed column; 82. Second polarization coaxial feed column; 83. Third polarization coaxial feed column;

[0028] 9. Grounding metal post; 91. Recess. Detailed Implementation

[0029] The objectives, features, and advantages of this invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0031] It should be noted that if the embodiments of the present invention involve directional indicators such as up, down, left, right, front, back, etc., the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicators will also change accordingly.

[0032] Furthermore, if the embodiments of the present invention involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0033] Furthermore, if the meaning of "and / or" appears throughout the text, it refers to three parallel solutions. For example, "and / or" includes solution 1, solution 2, and solution 3, which simultaneously satisfy the above conditions. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] Example 1

[0036] Please refer to Figures 1 to 7 The first embodiment of the present invention is: a novel DRA millimeter-wave antenna that can be applied to handheld devices for 5G millimeter-wave communication, such as mobile phones, tablets, and smartwatches.

[0037] like Figures 1 to 5 As shown, 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. The top surface of the substrate assembly 1 is provided with a feed patch 3, a first feed metal element 4, and a second feed metal element 5. The bottom surface of the dielectric resonator 2 is attached to the feed patch 3. The first feed metal element 4 is disposed on the front and rear sides of the dielectric resonator 2, respectively, and the second feed metal element 5 is disposed on the left and right sides of the dielectric resonator 2, respectively. Both the first feed metal element 4 and the second feed metal element 5 are in contact with the dielectric resonator 2. The substrate assembly 1 contains a first matching balun structure 6 connecting the first feed metal element 4 and a second matching balun structure 7 connecting the second feed metal element 5. In this embodiment, the dielectric resonator 2 has a length of 6 mm, a width of 4.8 mm, and a height of 3 mm.

[0038] The first feeding metal part 4 is used to generate a first polarization of the DRA millimeter-wave antenna, the second feeding metal part 5 is used to generate a second polarization of the DRA millimeter-wave antenna, and the feeding patch 3 is used to generate a third polarization of the DRA millimeter-wave antenna.

[0039] Please combine Figure 1 and Figure 3 The top surface of the substrate assembly 1 is also provided with a first pad 16 and a second pad 17. The first power supply metal part 4 is soldered on the first pad 16 and connected to the first matching balun structure 6 through the first pad 16; the second power supply metal part 5 is soldered on the second pad 17 and connected to the second matching balun structure 7 through the second pad 17.

[0040] In this embodiment, the first power supply metal component 4 is L-shaped, one end of which is soldered to the first pad 16, and the other end of the second power supply metal component 5 is in contact with the dielectric resonator 2. Similarly, the second power supply metal component 5 can also be L-shaped.

[0041] like Figure 1 As shown, to better fix the dielectric resonator 2, the first feeding metal component 4 and the second feeding metal component 5 are provided with a first hole 21 for inserting a portion of the first feeding metal component 4 and a second hole 22 for inserting a portion of the second feeding metal component 5. Specifically, the end of the first feeding metal component 4 away from the first pad 16 is inserted into the first hole 21, and the end of the second feeding metal component 5 away from the second pad 17 is inserted into the second hole 22. Preferably, the two first feeding metal components 4 and the two second feeding metal components 5 are arranged opposite each other. In this embodiment, the outer wall of the first feeding metal component 4 contacts the inner wall of the first hole 21; the outer wall of the second feeding metal component 5 contacts the inner wall of the second hole 22; the diameters of the first hole 21 and the second hole 22 are 0.3 mm and the depths are 0.8 mm, respectively. In other embodiments, the end face of the first feeding metal component 4 / the end face of the second feeding metal component 5 may also contact the dielectric resonator 2.

[0042] Preferably, the diameter of the first hole 21 is the same as or slightly larger than the diameter of the end of the first power supply metal component 4 away from the first pad 16. This facilitates the assembly of the first power supply metal component 4 with the dielectric resonator 2 and allows for a larger contact area between them. Similarly, the same applies to the second hole 22 and the second power supply metal component 5.

[0043] To facilitate the manufacturing of the first feed metal component 4 and the second feed metal component 5 and reduce the weight of the DRA millimeter-wave antenna, the first feed metal component 4 includes a first plastic body and a first metal layer covering at least the outer peripheral wall of the first plastic body. The first plastic body is L-shaped. The first metal layer can be formed on the first plastic body by a thin-film coating process (in which case, the first metal layer is equivalent to the skin of the first plastic body) or it can be directly plated on the first plastic body. Similarly, preferably, the first feed metal component 4 includes a second plastic body and a second metal layer covering at least the outer peripheral wall of the second plastic body. In other embodiments, the first metal layer can also completely cover the first plastic body, that is, the end face of the first plastic body is also covered by the first metal layer.

[0044] Please combine Figures 2 to 5 Furthermore, the bottom surface of the substrate assembly 1 is provided with a first polarized coaxial feed post 81, a second polarized coaxial feed post 82, and a third polarized coaxial feed post 83. The first polarized coaxial feed post 81 is connected to the first matching balun structure 6, the second polarized coaxial feed post 82 is connected to the second matching balun structure 7, and the third polarized coaxial feed post 83 is connected to the feed patch 3.

[0045] Please combine Figure 2 , Figure 4 and Figure 5 The substrate assembly 1 includes a first ground layer 11, a second ground layer 12, and a third ground layer 13 arranged sequentially 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 location of the first matching balun structure 6 between the first ground layer 11 and the second ground layer 12, and the location of the second matching balun structure 7 between the second ground layer 12 and the third ground layer 13, not only effectively reduces the coupling between the first matching balun structure 6 and the second matching balun structure 7, but also reduces external signal interference, thus helping to ensure the performance of the DRA millimeter-wave antenna.

[0046] 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 power feed 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 to the bottom surface of the first ground layer 11, and the third dielectric layer is connected to the top surface of the second ground layer 12. The first matching balun structure 6 is disposed between the second dielectric layer and the third dielectric layer. The fourth dielectric layer is connected to the bottom surface of the second ground layer 12, and the fifth dielectric layer is connected to the top surface of the third ground layer 13. The second matching balun structure 7 is disposed 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 polarized coaxial power feed post 81, the second polarized coaxial power feed post 82, and the third polarized coaxial power feed post 83 are exposed from the bottom surface of the sixth dielectric layer 15.

[0047] Preferably, the substrate assembly 1 is provided with a plurality of grounding metal pillars 9, which are respectively connected to the first ground layer 11, the second ground layer 12 and the third ground layer 13. The plurality of grounding metal pillars 9 enclose three recesses 91, and the first polarized coaxial feed pillar 81, the second polarized coaxial feed pillar 82 and the third polarized coaxial feed pillar 83 are respectively located in different recesses 91.

[0048] like Figure 4 As shown, 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 to a first feed metal element 4 for conduction. The other end of the first microstrip line 61 is connected to one end of the second microstrip line 62. The other end of the second microstrip line 62 is connected to one end of the third microstrip line 63. The other end of the third microstrip line 63 is connected to the fourth microstrip line 64. One end of the fifth microstrip line 65 is connected to the middle region of the third microstrip line 63, and the other end of the fifth microstrip line 65 is connected to the first polarized coaxial feed post 81. The second microstrip line 62, the third microstrip line 63, the fourth microstrip line 64, and the fifth microstrip line 65 form an E-shaped structure. The sixth microstrip line 66 is arranged 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 and conductive to another first feed metal component 4. Similarly, the second matching balun structure 7 can adopt the same construction as the first matching balun structure 6.

[0049] It also includes a chip assembly (not shown in the figure) and an RF switch (not shown in the figure), wherein the chip assembly is connected to the first polarized coaxial feed post 81, the second polarized coaxial feed post 82 and the third polarized coaxial feed post 83 respectively through the RF switch.

[0050] Figure 6 The diagram shows a comparison of the S-parameters of the DRA millimeter-wave antenna in different polarization modes according to this embodiment; where "Polarization 1" is the curve of the DRA millimeter-wave antenna in the first polarization mode, "Polarization 2" is the curve of the DRA millimeter-wave antenna in the second polarization mode, and "Polarization 3" is the curve of the DRA millimeter-wave antenna in the third polarization mode. Figure 6 As can be seen, the DRA millimeter-wave antenna basically covers the N257 (26.5GHz-29.5GHz) and N258 (24.25-27.25GHz) frequency bands specified by 3GPP.

[0051] When this DRA millimeter-wave antenna is connected to the chip assembly and RF switch, the three polarizations can be switched using the RF switch, making the S-parameter diagram of the DRA millimeter-wave antenna equivalent to... Figure 7 ,Depend on Figure 7 It can be seen that the bandwidth of this DRA millimeter-wave antenna covers 22-31GHz, making it a high-performance broadband antenna.

[0052] The above are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A novel DRA millimeter-wave antenna, comprising a substrate assembly and a dielectric resonator disposed on the substrate assembly, wherein the dielectric resonator is rectangular in shape, characterized in that: The top surface of the substrate assembly is provided with a power feed patch, a first power feed metal component, and a second power feed metal component. The bottom surface of the dielectric resonator is attached to the power feed patch. The first power feed metal component is provided on the front and rear sides of the dielectric resonator, and the second power feed metal component is provided on the left and right sides of the dielectric resonator. Both the first power feed metal component and the second power feed metal component are in contact with the dielectric resonator. The substrate assembly is provided with a first matching balun structure connecting the first power feed metal component and a second matching balun structure connecting the second power feed metal component. The bottom surface of the substrate assembly is provided with a first polarized coaxial feed post, a second polarized coaxial feed post and a third polarized coaxial feed post. The first polarized coaxial feed post is connected to the first matching balun structure, the second polarized coaxial feed post is connected to the second matching balun structure, and the third polarized coaxial feed post is connected to the feed patch. The first matching balun structure includes 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 to a first feeding metal component for conduction. The other end of the first microstrip line is connected to one end of the second microstrip line. The other end of the second microstrip line is connected to one end of the third microstrip line. The other end of the third microstrip line is connected to one end of the fourth microstrip line. One end of the fifth microstrip line is connected to the middle region of the third microstrip line. The other end of the fifth microstrip line is connected to the first polarized coaxial feeding post. The second, third, fourth, and fifth microstrip lines together form an E-shaped structure. The sixth microstrip line is arranged parallel to the fourth microstrip line, one end of the seventh microstrip line is connected to one end of the sixth microstrip line, and the other end of the seventh microstrip line is connected to another first feeding metal component.

2. The novel DRA millimeter-wave antenna according to claim 1, characterized in that: The first power supply metal component is L-shaped.

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

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

5. The novel DRA millimeter-wave antenna according to claim 1, characterized in that: The first power-feeding metal component includes a first plastic body and a first metal layer covering at least the outer peripheral wall of the first plastic body.

6. The novel DRA millimeter-wave antenna according to claim 1, characterized in that: The substrate assembly includes a first ground layer, a second ground layer, and a third ground layer arranged sequentially from top to bottom. The first matching balun structure is located between the first ground layer and the second ground layer, and the second matching balun structure is located between the second ground layer and the third ground layer.

7. The novel DRA millimeter-wave antenna according to claim 6, characterized in that: The substrate assembly further includes 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 disposed on the top surface of the first ground layer, and the power supply patch is disposed on the top surface of the first dielectric layer. The top surface of the first dielectric layer is also provided with a first pad for soldering the first power supply metal component and a second pad for soldering the second power supply metal component. The second dielectric layer is connected to the bottom surface of the first ground layer, and the third dielectric layer is connected to the top surface of the second ground layer. The first matching balun structure is disposed between the second dielectric layer and the third dielectric layer. The fourth dielectric layer is connected to the bottom surface of the second ground layer, and the fifth dielectric layer is connected to the top surface of the third ground layer. The second matching balun structure is disposed between the fourth dielectric layer and the fifth dielectric layer. The sixth dielectric layer is disposed on the bottom surface of the third ground layer, and the first polarized coaxial power supply post, the second polarized coaxial power supply post, and the third polarized coaxial power supply post are exposed from the bottom surface of the sixth dielectric layer.

8. The novel DRA millimeter-wave antenna according to claim 6, characterized in that: The substrate assembly is provided with a plurality of grounding metal pillars, which are respectively connected to the first ground layer, the second ground layer and the third ground layer. The plurality of grounding metal pillars enclose three recesses, and the first polarized coaxial feed pillar, the second polarized coaxial feed pillar and the third polarized coaxial feed pillar are respectively located in different recesses.

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