CN113571883A - Ultra-wideband dielectric resonator antenna and electronic equipment - Google Patents

Ultra-wideband dielectric resonator antenna and electronic equipment Download PDF

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Publication number
CN113571883A
CN113571883A CN202110782565.XA CN202110782565A CN113571883A CN 113571883 A CN113571883 A CN 113571883A CN 202110782565 A CN202110782565 A CN 202110782565A CN 113571883 A CN113571883 A CN 113571883A
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China
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dielectric resonator
dielectric
feed
ultra
antenna
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CN202110782565.XA
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Chinese (zh)
Inventor
赵伟
唐小兰
戴令亮
谢昱乾
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Shenzhen Sunway Communication Co Ltd
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Shenzhen Sunway Communication Co Ltd
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Priority to CN202110782565.XA priority Critical patent/CN113571883A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/48—Earthing means; Earth screens; Counterpoises
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/0006—Particular feeding systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system

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Abstract

The invention discloses an ultra-wideband dielectric resonator antenna and electronic equipment, which comprise a substrate and a dielectric resonator, wherein the substrate comprises a stacked grounding layer and a dielectric layer; the dielectric resonators comprise a first dielectric resonator and a second dielectric resonator, the first dielectric resonator and the second dielectric resonator are both in the shape of a right triangular prism, the bottom surface of the right triangular prism is a right triangle, and the first dielectric resonator and the second dielectric resonator are connected in a right-angle overlapping mode; the first dielectric resonator and the second dielectric resonator have different feeding modes. The invention combines the dielectric resonators with different feeding modes to excite a plurality of radiation modes, thereby increasing the bandwidth.

Description

Ultra-wideband dielectric resonator antenna and electronic equipment
Technical Field
The invention relates to the technical field of wireless communication, in particular to an ultra-wideband dielectric resonator antenna and electronic equipment.
Background
5G is the focus of research and development in the world, and 5G standard has become common in the industry by developing 5G technology. 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 three 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 100 Mbps. The unique high carrier frequency and large bandwidth characteristics of millimeter waves are the main means for realizing 5G ultrahigh data transmission rate.
According to the technical specification of 3GPP TS 38.101-25G terminal radio frequency and the report of TR38.817 terminal radio frequency, 5 GmWave frequency band has n257(26.5-29.5GHz), n258(24.25-27.25GHz), n260(37-40GHz) and n261(27.5-28.35GHz) and newly added n259(39.5-43GHz), and a broadband or dual-frequency antenna is required to be designed to cover the frequency bands.
At present, if the millimeter wave WiFi frequency band reaches 60GHz, if a 5G millimeter wave antenna and a 60GHz WiFi antenna use two antennas to realize frequency bands, the terminal space is reduced, and if a single antenna can cover the 5G millimeter wave frequency band and the 60GHz WiFi frequency band, the situation that multiple antennas occupy too much terminal space can be avoided, so that an ultra-wideband antenna is required to be designed to cover the frequency bands.
No matter the antenna form of the conventional millimeter wave broadband antenna based on the PCB is Patch (Patch), Dipole (Dipole), slot (slot) and the like, because the bandwidth is required to cover n257, n258 and n260, the thickness of the PCB is increased, the number of layers at the moment is increased, and because in a millimeter frequency band, the precision requirements of the multilayer PCB on hole, line width and line distance are high, and the processing difficulty is high.
The dielectric resonator has the advantages of small loss, high radiation efficiency and the like, and compared with a conventional millimeter wave broadband antenna based on a PCB, the dielectric resonator antenna has the advantages of small volume and low cost. However, the relative bandwidth of the dielectric resonator antenna is usually relatively small, and cannot meet the requirement of broadband.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provided are an ultra-wideband dielectric resonator antenna and an electronic device, which can increase the bandwidth and realize the broadband characteristic.
In order to solve the technical problems, the invention adopts the technical scheme that: an ultra-wideband dielectric resonator antenna comprises a substrate and a dielectric resonator, wherein the substrate comprises a grounding layer and a dielectric layer which are laminated, and the dielectric resonator is arranged on the grounding layer; the dielectric resonators comprise a first dielectric resonator and a second dielectric resonator, the first dielectric resonator and the second dielectric resonator are both in the shape of a right triangular prism, the bottom surface of the right triangular prism is a right triangle, and the first dielectric resonator and the second dielectric resonator are connected in a right-angle overlapping mode; the first dielectric resonator and the second dielectric resonator have different feeding modes.
The invention also provides an electronic device comprising the ultra-wideband dielectric resonator antenna.
The invention has the beneficial effects that: by combining the dielectric resonators with different feeding modes, a plurality of radiation modes are excited, so that the bandwidth is increased, and the broadband characteristic is realized.
Drawings
Fig. 1 is a schematic structural diagram of an ultra-wideband dielectric resonator antenna according to a first embodiment of the present invention;
fig. 2 is a left side view schematically illustrating an ultra-wideband dielectric resonator antenna according to a first embodiment of the present invention;
fig. 3 is a schematic top view of an ultra-wideband dielectric resonator antenna according to a first embodiment of the present invention;
fig. 4 is a schematic structural diagram of an ultra-wideband dielectric resonator antenna according to a second embodiment of the present invention;
fig. 5 is a schematic top view of an ultra-wideband dielectric resonator antenna according to a second embodiment of the present invention;
fig. 6 is a schematic diagram of S parameters of antenna 1 and antenna 2;
fig. 7 is a schematic diagram of an S-parameter of an ultra-wideband dielectric resonator antenna according to an embodiment of the present invention.
Description of reference numerals:
1. a substrate; 2. a dielectric resonator; 3. a feed line; 4. a feed probe; 5. a microstrip line;
11. a ground plane; 12. a dielectric layer;
111. a through hole; 112. a feed gap; 113. grooving;
121. metallizing the hole;
21. a first dielectric resonator; 22. a second dielectric resonator.
Detailed Description
In order to explain technical contents, objects and effects of the present invention in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Referring to fig. 1, an ultra-wideband dielectric resonator antenna includes a substrate and a dielectric resonator, where the substrate includes a stacked ground layer and a dielectric layer, and the dielectric resonator is disposed on the ground layer; the dielectric resonators comprise a first dielectric resonator and a second dielectric resonator, the first dielectric resonator and the second dielectric resonator are both in the shape of a right triangular prism, the bottom surface of the right triangular prism is a right triangle, and the first dielectric resonator and the second dielectric resonator are connected in a right-angle overlapping mode; the first dielectric resonator and the second dielectric resonator have different feeding modes.
From the above description, the beneficial effects of the present invention are: by combining dielectric resonators of different feeding modes, multiple radiation modes are excited, thereby increasing the bandwidth.
Further, the side lengths of two right-angle sides of the right-angle triangle are 0.21 lambda-0.23 lambda and 0.31 lambda-0.35 lambda respectively, the height of the right triangular prism is 0.13 lambda-0.16 lambda, and lambda is the wavelength length corresponding to 28 GHz; the dielectric resonator has a dielectric constant of 10.
From the above description, it can be seen that by optimizing the shape, size and dielectric constant of the dielectric resonator, the antenna of the present invention can cover not only the 5G millimeter wave frequency band but also the 60GHz WiFi frequency band, and thus, a single antenna can cover the 5G millimeter wave frequency band and the 60GHz WiFi frequency band, thereby saving the terminal space and improving the utilization rate of the terminal space.
Furthermore, the feeding mode of the first dielectric resonator is probe feeding, and the feeding mode of the second dielectric resonator is slot coupling feeding or coplanar waveguide feeding.
The feed line is arranged on one surface of the dielectric layer, which is far away from the ground layer; the feed probe is arranged on the substrate and is close to the first dielectric resonator; the grounding layer is provided with a through hole, a metalized hole is formed in the dielectric layer, one end of the feed probe penetrates through the through hole and is connected with one end of the metalized hole, and the other end of the metalized hole is connected with the feed line.
Further, the through-hole is concentric with the metalized hole; the aperture of the first through hole is larger than the diameter of the feed probe.
As can be seen from the above description, the feed probe is prevented from contacting the ground plane.
Furthermore, a feed gap is arranged on the ground layer, the second dielectric resonator covers the feed gap, and the feed line is coupled with the feed gap.
Furthermore, the feed gap is L-shaped, and the right-angle side of the second dielectric resonator covers the feed gap.
As can be seen from the above description, the feeding manner of the second dielectric resonator is slot coupling feeding; by having the feed slot along two legs of the bottom surface of the second dielectric resonator, the antenna coupling can be increased.
Furthermore, a slot is arranged on the grounding layer; the microstrip line is arranged on the dielectric layer and is positioned in the slot; one end of the microstrip line is connected with the feeder line through the metalized hole, and the second dielectric resonator covers a part of the microstrip line.
Furthermore, the slot and the microstrip line are both in a T shape, the right-angle edge of the second dielectric resonator covers a part of the microstrip line, and the part of the microstrip line covered by the second dielectric resonator is in an L shape.
As can be seen from the above description, the feeding manner of the second dielectric resonator is coplanar waveguide feeding; by arranging the L-shaped part of the microstrip line along two right-angle sides of the bottom surface of the second dielectric resonator, the antenna coupling can be increased.
The invention also provides an electronic device comprising the ultra-wideband dielectric resonator antenna.
Example one
Referring to fig. 1-3, a first embodiment of the present invention is: an ultra-wideband dielectric resonator antenna is applicable to a 5G millimeter wave communication system.
As shown in fig. 1, the antenna comprises a substrate 1 and a dielectric resonator 2, wherein the substrate 1 comprises a grounding layer 11 and a dielectric layer 12 which are laminated, and the dielectric resonator 2 is arranged on the grounding layer 11; the dielectric resonator 2 comprises a first dielectric resonator 21 and a second dielectric resonator 22, the first dielectric resonator 21 and the second dielectric resonator 22 are both in the shape of a right triangular prism, the bottom surface of the right triangular prism is a right triangle, and the first dielectric resonator 21 and the second dielectric resonator 22 are connected in a right-angle superposition manner; the first dielectric resonator and the second dielectric resonator are rotationally symmetrical by 180 degrees with the overlapping part as the center. The first dielectric resonator 21 and the second dielectric resonator 22 have different feeding methods. By combining the dielectric resonators with different feeding modes, a plurality of radiation modes are excited, so that the bandwidth is increased, and the broadband characteristic is realized.
In this embodiment, the first dielectric resonator 21 and the second dielectric resonator 22 have the same size. Specifically, the side lengths of two right-angle sides of the right-angle triangle are 0.21 lambda-0.23 lambda and 0.31 lambda-0.35 lambda respectively, the height of the right-angle triangular prism is 0.13 lambda-0.16 lambda, and lambda is the wavelength length. Further, λ is a wavelength length corresponding to 28GHz, that is, λ is (3 × 10)8)/(28×109) 0.0107m 10.7 mm. Preferably, in the present embodiment, the two right-angle sides of the right-angle triangle have side lengths of 2.39mm and 3.50mm, respectively, and the height of the triangular prism is 1.50 mm. The dielectric constant of the dielectric resonator is 10, namely the dielectric constants of the first dielectric resonator and the second dielectric resonator are both 10.
By optimizing the shape, size and dielectric constant of the dielectric resonator, the antenna of the embodiment can cover a 60GHz WiFi frequency band besides a 5G millimeter wave frequency band, so that a single antenna can cover the 5G millimeter wave frequency band and the 60GHz WiFi frequency band, the space of a terminal can be saved, and the utilization rate of the space of the terminal can be improved.
Further, in the feeding method, in the present embodiment, the first dielectric resonator 21 is fed by using a probe, and the second dielectric resonator 22 is fed by using slot coupling.
Specifically, as for the feeding structure of the first dielectric resonator, as shown in fig. 2, the feeding structure further includes a feeding line 3 and a feeding probe 4, wherein the feeding line 3 is disposed on a side of the dielectric layer 12 away from the ground layer 11; the feed probe 4 is disposed on the substrate and is close to the first dielectric resonator 21. In this embodiment, as shown in fig. 3, the feeding probe 4 is located on one side of the first dielectric resonator 21 and is tightly attached to one side surface of the first dielectric resonator 21, where the one side surface is a side surface corresponding to the short right-angle side.
As shown in fig. 2, a through hole 111 is provided on the ground layer 11, a metalized hole 121 is provided in the dielectric layer 12, and the through hole 111 is concentric with the metalized hole 121; the feed probe 4 is located above the metallization hole 121, one end of the feed probe 4 passes through the through hole 111 and is connected with one end of the metallization hole 121, and the other end of the metallization hole 121 is connected with the feed line 3. Wherein the aperture of the through hole is larger than the diameter of the feed probe so as to avoid the feed probe from contacting the ground layer.
As for the feeding structure of the second dielectric resonator, as shown in fig. 3, a feeding slot 112 is provided on the ground layer 11, the second dielectric resonator 22 covers the feeding slot 112, and the feeding line 3 is coupled to the feeding slot 112.
In this embodiment, the feed slot is L-shaped, and the right-angled side of the second dielectric resonator 22 covers the feed slot 112. Specifically, the feed slot comprises a first branch and a second branch which are connected in sequence, the first branch is perpendicular to the second branch, the length direction of the first branch is parallel to a right-angle edge (long right-angle edge) of the bottom surface of the second dielectric resonator, and the right-angle edge (long right-angle edge) covers the first branch; the length direction of the second branch is parallel to another right-angle side (short right-angle side) of the bottom surface of the second dielectric resonator, and the other right-angle side (short right-angle side) covers the second branch. Wherein the right-angle side of the second dielectric resonator may only cover part of the feed slot, in this embodiment the long right-angle side of the second dielectric resonator covers part of the first branch.
By having the feed slot along two legs of the bottom surface of the second dielectric resonator, the antenna coupling can be increased.
Further, the length direction of the power supply line is the same as that of the second branch, and the projection of the second branch on the dielectric layer is overlapped with that of the power supply line on the dielectric layer, so that coupling between the power supply line and the power supply gap is achieved.
Example two
Referring to fig. 4 to 5, this embodiment is another implementation manner of the feeding manner of the second dielectric resonator in the first embodiment, and in this embodiment, the second dielectric resonator is fed by using a coplanar waveguide.
Specifically, as shown in fig. 4-5, the ground layer 11 is provided with a slot 113; the microstrip line 5 is arranged on the dielectric layer 12 and is positioned in the slot 113; a gap exists between the microstrip line 5 and the ground layer 11. One end of the microstrip line 5 is connected to the feed line 3 through a metallized hole (not shown) in the dielectric layer 12, and the second dielectric resonator 22 covers a part of the microstrip line 5.
In this embodiment, the slot 113 and the microstrip line 5 are both T-shaped, the right-angle side of the second dielectric resonator 22 covers a part of the microstrip line 5, and a part of the microstrip line 5 covered by the second dielectric resonator 22 is L-shaped. Specifically, the microstrip line comprises a first line segment and a second line segment, one end of the second line segment is connected with the middle part of the first line segment, and the first line segment is vertical to the second line segment; the length direction of the second line segment is parallel to a right-angle side (long right-angle side) of the bottom surface of the second dielectric resonator, and the length direction of the first line segment is parallel to the other right-angle side (short right-angle side) of the bottom surface of the second dielectric resonator; one end of the first line segment is connected with the feeder line through the metalized hole, the other end of the first line segment is combined with the second line segment to obtain an L-shaped line segment, a right-angle edge (long right-angle edge) of the second dielectric resonator covers the second line segment, and the other right-angle edge (short right-angle edge) of the second dielectric resonator covers the other end of the first line segment.
By arranging the L-shaped part of the microstrip line along two right-angle sides of the bottom surface of the second dielectric resonator, the antenna coupling can be increased.
Further, in this embodiment, the metalized hole may be the metalized hole in the first embodiment, that is, the feeding probe and the microstrip line are connected to the feeding line through the same metalized hole. The through hole on the grounding layer can be overlapped with the slot; the feed line may extend only under the metallization hole, i.e. the other end of the metallization hole is connected to one end of the feed line, which extends to the edge of the substrate and is connected to a feed port (not shown in the figure).
Assuming that the first dielectric resonator and the second dielectric resonator are respectively used as radiators of two antennas, wherein the first dielectric resonator corresponds to the antenna 1, and the second dielectric resonator corresponds to the antenna 2, the S parameter diagram of the antenna 1 and the antenna 2 is shown in fig. 6, and it can be seen from the diagram that the antenna 1 excites TE x111 mode (TE 111 mode of ZOX cross section), and TE excited by antenna 2y111 (TE 111 mode of the ZOY cross section) and slot radiation mode. The plane of the substrate is parallel to the XOY plane, the long right-angle sides of the first dielectric resonator and the second dielectric resonator are parallel to the X-axis direction, the short right-angle sides of the first dielectric resonator and the second dielectric resonator are parallel to the Y-axis direction, and the height directions of the first dielectric resonator and the second dielectric resonator are parallel to the Z-axis direction.
The S-parameter diagram of the antenna formed by combining the first dielectric resonator and the second dielectric resonator, that is, the ultra-wideband dielectric resonator antenna in the foregoing embodiment, is shown in fig. 7, and it can be found that the antenna covers all frequency bands of 5G millimeter waves and 60GHz WiFi frequency band at present. Wherein, comparing fig. 6 and fig. 7, it can be seen that the resonant frequency of 24-40GHz in fig. 7 is the same as the resonant frequency of the antenna 1 and the antenna 2 in fig. 6, and the radiation mode corresponding to the resonant frequency of the antenna 1 and the antenna 2 is TE x111、TE y111 and slot radiation modes, but also the 55-60GHz radiation is shown in figure 7, which isThe impedance matching of the combined antenna is realized, and the radiation mode is TE through field distribution observation x113 higher order mode, i.e. TE at 55-60GHz x113 the bandwidth excited by the radiation pattern.
From the above description, the ultra-wideband dielectric resonator antenna of the present invention covers n258(24.25-27.25GHz), n257(26.5-29.5GHz) and n260(37-40GHz) frequency bands, and also covers 60GHz WiFi frequency band.
In summary, the ultra-wideband dielectric resonator antenna and the electronic device provided by the invention combine the dielectric resonators with different feeding modes to excite multiple radiation modes, thereby increasing the bandwidth and realizing the broadband characteristic; by optimizing the shape, size and dielectric constant of the dielectric resonator, the antenna can cover not only a 5G millimeter wave frequency band, but also a 60GHz WiFi frequency band, and the single antenna can cover the 5G millimeter wave frequency band and the 60GHz WiFi frequency band, so that the space of the terminal can be saved, and the utilization rate of the space of the terminal can be improved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.

Claims (10)

1. The ultra-wideband dielectric resonator antenna is characterized by comprising a substrate and a dielectric resonator, wherein the substrate comprises a laminated ground layer and a dielectric layer, and the dielectric resonator is arranged on the ground layer; the dielectric resonators comprise a first dielectric resonator and a second dielectric resonator, the first dielectric resonator and the second dielectric resonator are both in the shape of a right triangular prism, the bottom surface of the right triangular prism is a right triangle, and the first dielectric resonator and the second dielectric resonator are connected in a right-angle overlapping mode; the first dielectric resonator and the second dielectric resonator have different feeding modes.
2. The ultra-wideband dielectric resonator antenna of claim 1, wherein the two legs of the right triangle have side lengths of 0.21 λ -0.23 λ and 0.31 λ -0.35 λ, respectively, the right triangular prism has a height of 0.13 λ -0.16 λ, and λ is a wavelength length corresponding to 28 GHz; the dielectric resonator has a dielectric constant of 10.
3. The ultra-wideband dielectric resonator antenna of claim 1 or 2, wherein the first dielectric resonator is fed by a probe, and the second dielectric resonator is fed by a slot coupling feed or a coplanar waveguide feed.
4. The ultra-wideband dielectric resonator antenna of claim 3, further comprising a feed line and a feed probe, the feed line being disposed on a side of the dielectric layer remote from the ground plane; the feed probe is arranged on the substrate and is close to the first dielectric resonator; the grounding layer is provided with a through hole, a metalized hole is formed in the dielectric layer, one end of the feed probe penetrates through the through hole and is connected with one end of the metalized hole, and the other end of the metalized hole is connected with the feed line.
5. The ultra-wideband dielectric resonator antenna of claim 4, wherein the through-holes are concentric with the metallized holes; the aperture of the first through hole is larger than the diameter of the feed probe.
6. The ultra-wideband dielectric resonator antenna of claim 3, wherein the ground plane is provided with a feed slot, the second dielectric resonator covers the feed slot, and the feed line is coupled to the feed slot.
7. The ultra-wideband dielectric resonator antenna of claim 6, wherein the feed slot is L-shaped, and the right-angled edge of the second dielectric resonator covers the feed slot.
8. The ultra-wideband dielectric resonator antenna of claim 3, wherein the ground plane is provided with a slot; the microstrip line is arranged on the dielectric layer and is positioned in the slot; one end of the microstrip line is connected with the feeder line through the metalized hole, and the second dielectric resonator covers a part of the microstrip line.
9. The ultra-wideband dielectric resonator antenna of claim 8, wherein the slot and the microstrip line are both T-shaped, the right-angle side of the second dielectric resonator covers a portion of the microstrip line, and the portion of the microstrip line covered by the second dielectric resonator is L-shaped.
10. An electronic device comprising an ultra-wideband dielectric resonator antenna as claimed in any of claims 1 to 9.
CN202110782565.XA 2021-07-12 2021-07-12 Ultra-wideband dielectric resonator antenna and electronic equipment Pending CN113571883A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110782565.XA CN113571883A (en) 2021-07-12 2021-07-12 Ultra-wideband dielectric resonator antenna and electronic equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110782565.XA CN113571883A (en) 2021-07-12 2021-07-12 Ultra-wideband dielectric resonator antenna and electronic equipment

Publications (1)

Publication Number Publication Date
CN113571883A true CN113571883A (en) 2021-10-29

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Application Number Title Priority Date Filing Date
CN202110782565.XA Pending CN113571883A (en) 2021-07-12 2021-07-12 Ultra-wideband dielectric resonator antenna and electronic equipment

Country Status (1)

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CN (1) CN113571883A (en)

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