CN215600566U - Dielectric resonator antenna and communication equipment - Google Patents
Dielectric resonator antenna and communication equipment Download PDFInfo
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- CN215600566U CN215600566U CN202121066781.6U CN202121066781U CN215600566U CN 215600566 U CN215600566 U CN 215600566U CN 202121066781 U CN202121066781 U CN 202121066781U CN 215600566 U CN215600566 U CN 215600566U
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Abstract
The utility model discloses a dielectric resonator antenna and communication equipment.A dielectric layer is arranged on one side of a metal layer, a first dielectric block and a second dielectric block are arranged on the other side of the metal layer, and two feed gaps are arranged on the metal layer; two dielectric blocks are excited through two feed gaps to radiate in different modes, two feed gaps and a first dielectric block or a second dielectric block form first mode resonance, rectangular space formed by the two feed gaps and the first dielectric block and the second dielectric block forms second mode resonance, the two feed gaps also form third mode resonance, three mode resonances are jointly generated through the two gaps and the two dielectric blocks, the frequency band coverage rate of the antenna module is greatly increased, a mode designed based on a dielectric resonator antenna is adopted simultaneously, and the structure of the antenna module is simplified.
Description
Technical Field
The utility model relates to the technical field of antennas, in particular to a dielectric resonator antenna and communication equipment.
Background
5G has been a common consensus in the industry as the focus of research and development in the global industry, developing 5G technology and establishing 5G standards. With the development of 5G technology, the requirements for 5G antenna modules are higher and higher. Especially for the performance requirements to cover multiple frequency bands. In order to realize that the 5G antenna module can cover a plurality of frequency bands, it is easy to think that a plurality of antennas of different frequency bands are adopted to form a multi-antenna module. However, the multi-antenna module inevitably increases the space occupied by the antenna device in the terminal device.
In contrast, in the prior art, a design based on a wideband or multi-band microstrip patch antenna is usually adopted to realize multi-band coverage, and the design has the advantages of simple structure, clear principle, acceptable performance and the like. However, the design based on the patch antenna has the disadvantages of requiring a complex dielectric substrate layer structure and a non-integrated dual-frequency implementation, and thus, the application of the 5G millimeter wave broadband or multi-frequency antenna faces many design challenges.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is as follows: a dielectric resonator antenna is provided to improve the frequency band coverage of an antenna module with a simple structure.
In order to solve the technical problems, the utility model adopts the technical scheme that:
a dielectric resonator antenna comprises a first dielectric block, a second dielectric block, a metal layer and a dielectric layer;
the dielectric layer is arranged on one side of the metal layer;
the first dielectric block and the second dielectric block are arranged on the other side of the metal layer;
and the metal layer is provided with two feed gaps at the positions corresponding to the first dielectric block and the second dielectric block.
Further, the first dielectric block and the second dielectric block are cylindrical dielectric blocks with the same size;
and the side surface of the first dielectric block is tangent to the side surface of the second dielectric block.
Furthermore, a tangent between the side surface of the first dielectric block and the side surface of the second dielectric block is parallel to two opposite side edges of the dielectric layer.
Further, the radius of the cylindrical dielectric block is 1.3mm, the height of the cylindrical dielectric block is 3mm, and the dielectric constant of the cylindrical dielectric block is 9.4.
Further, the device also comprises a microstrip;
the microstrip is arranged on one side of the dielectric layer far away from the metal layer and is positioned between the two feed gaps.
Further, the microstrip is parallel to a tangent between the side surface of the first dielectric block and the side surface of the second dielectric block.
Furthermore, the two feed gaps have the same size and are arranged at positions corresponding to the first dielectric block and the second dielectric block in a step shape by taking the microstrip as a center; one of the feeding gaps is positioned at the position where the first dielectric block and the second dielectric block are tangent;
and the two feeding gaps are not completely covered by the first dielectric block and the second dielectric block.
Furthermore, a rectangular feed slot is also arranged on the metal layer;
the rectangular feed slots are distributed on two sides of the two feed gaps.
Further, the rectangular feed slots include four groups;
two groups of rectangular feed grooves are respectively arranged on two sides of the two feed gaps, the two groups of rectangular feed grooves are arranged on the metal layer at positions corresponding to the first dielectric blocks, and the other two groups of rectangular feed grooves are arranged on the metal layer at positions corresponding to the second dielectric blocks.
In order to solve the technical problem, the utility model adopts another technical scheme that:
a communication device includes the above dielectric resonator antenna.
The utility model has the beneficial effects that: the dielectric layer is arranged on one side of the metal layer, the first dielectric block and the second dielectric block are arranged on the other side of the metal layer, and the metal layer is provided with two feed gaps; two dielectric blocks are excited through two feed gaps to radiate in different modes, two feed gaps and a first dielectric block or a second dielectric block form first mode resonance, rectangular space formed by the two feed gaps and the first dielectric block and the second dielectric block forms second mode resonance, the two feed gaps also form third mode resonance, three mode resonances are jointly generated through the two gaps and the two dielectric blocks, the frequency band coverage rate of the antenna module is greatly increased, a mode designed based on a dielectric resonator antenna is adopted simultaneously, and the structure of the antenna module is simplified.
Drawings
Fig. 1 is a side view of a dielectric resonator antenna according to an embodiment of the present invention;
fig. 2 is a front view of a dielectric resonator antenna according to an embodiment of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 labeled A;
fig. 4 is a bottom view of a dielectric resonator antenna according to an embodiment of the present invention;
fig. 5 is a top view of a dielectric resonator antenna according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a quasi-rectangular dielectric block of a dielectric resonator antenna according to an embodiment of the present invention;
fig. 7 is a comparison diagram of S parameters of a quasi-rectangular dielectric block and a corresponding rectangular dielectric block of a dielectric resonator antenna according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of two feed slots of a dielectric resonator antenna according to an embodiment of the present invention;
fig. 9 is an S-parameter diagram of a dielectric resonator antenna according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a rectangular feed slot of a dielectric resonator antenna according to an embodiment of the present invention;
description of reference numerals:
1. a first dielectric block; 2. a second dielectric block; 3. a metal layer; 4. a dielectric layer; 5. a microstrip; 6. two feed gaps; 7. a rectangular feed slot; A. the partial structure of the metal layer, the dielectric layer and the microstrip is enlarged in fig. 2.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1, a dielectric resonator antenna includes a first dielectric block, a second dielectric block, a metal layer and a dielectric layer;
the dielectric layer is arranged on one side of the metal layer;
the first dielectric block and the second dielectric block are arranged on the other side of the metal layer;
and the metal layer is provided with two feed gaps at the positions corresponding to the first dielectric block and the second dielectric block.
From the above description, the beneficial effects of the present invention are: the dielectric layer is arranged on one side of the metal layer, the first dielectric block and the second dielectric block are arranged on the other side of the metal layer, and the metal layer is provided with two feed gaps; two dielectric blocks are excited through two feed gaps to radiate in different modes, two feed gaps and a first dielectric block or a second dielectric block form first mode resonance, rectangular space formed by the two feed gaps and the first dielectric block and the second dielectric block forms second mode resonance, the two feed gaps also form third mode resonance, three mode resonances are jointly generated through the two gaps and the two dielectric blocks, the frequency band coverage rate of the antenna module is greatly increased, a mode designed based on a dielectric resonator antenna is adopted simultaneously, and the structure of the antenna module is simplified.
Further, the first dielectric block and the second dielectric block are cylindrical dielectric blocks with the same size;
and the side surface of the first dielectric block is tangent to the side surface of the second dielectric block.
As can be seen from the above description, by providing the first dielectric block and the second dielectric block as cylindrical dielectric blocks having the same size, the two dielectric blocks can generate resonance of the same mode; and compared with the dielectric blocks with other shapes, the curved surfaces of the two cylindrical dielectric blocks are tangent, and the performance is optimal under the same volume.
Furthermore, a tangent between the side surface of the first dielectric block and the side surface of the second dielectric block is parallel to two opposite side edges of the dielectric layer.
As can be seen from the above description, a tangent line between the side surface of the first dielectric block and the side surface of the second dielectric block is parallel to two opposite side edges of the dielectric layer, so that the volume of the whole antenna radiation unit is smaller than that when the two side edges are not parallel, thereby reducing the size of the antenna.
Further, the radius of the cylindrical dielectric block is 1.3mm, the height of the cylindrical dielectric block is 3mm, and the dielectric constant of the cylindrical dielectric block is 9.4.
From the above description, it can be known that the radius of the cylindrical dielectric block is set to 1.3mm, the height is set to 3mm, and the dielectric constant is set to 9.4, so that the coupling performance of the two cylindrical dielectric blocks is optimized, the bandwidth of the dielectric resonator antenna is optimized, and the overall performance of the dielectric resonator antenna is improved.
Further, the device also comprises a microstrip;
the microstrip is arranged on one side of the dielectric layer far away from the metal layer and is positioned between the two feed gaps.
As can be seen from the above description, the microstrip is disposed between the two feed slots for transmitting the electrical signal, so that the microstrip can transmit the signal to the two feed slots in equal amount, thereby improving the efficiency of signal transmission.
Further, the microstrip is parallel to a tangent between the side surface of the first dielectric block and the side surface of the second dielectric block.
As can be seen from the above description, by making the microstrip parallel to the tangent between the side surface of the first dielectric block and the side surface of the second dielectric block, it is avoided that an extra trace path is required to increase the loss of the microstrip signal in the transmission process.
Furthermore, the two feed gaps have the same size and are arranged at positions corresponding to the first dielectric block and the second dielectric block in a step shape by taking the microstrip as a center; one of the feeding gaps is positioned at the position where the first dielectric block and the second dielectric block are tangent;
and the two feeding gaps are not completely covered by the first dielectric block and the second dielectric block.
As can be seen from the above description, the two feeding slots are set to have the same size, and are arranged in a step shape with the microstrip as the center at positions corresponding to the first dielectric block and the second dielectric block, and both the two feeding slots are not completely covered by the first dielectric block and the second dielectric block, so that the performance of the dielectric resonator antenna is optimized.
Furthermore, a rectangular feed slot is also arranged on the metal layer;
the rectangular feed slots are distributed on two sides of the two feed gaps.
As can be seen from the above description, by providing the rectangular feeding groove on the metal layer, the bandwidth of the dielectric resonator antenna can be finely adjusted through the rectangular feeding groove, so that the performance of the dielectric resonator antenna is optimized.
Further, the rectangular feed slots include four groups;
two groups of rectangular feed grooves are respectively arranged on two sides of the two feed gaps, the two groups of rectangular feed grooves are arranged on the metal layer at positions corresponding to the first dielectric blocks, and the other two groups of rectangular feed grooves are arranged on the metal layer at positions corresponding to the second dielectric blocks.
As can be seen from the above description, by providing four sets of rectangular feed slots, where two sets of rectangular feed slots are disposed at positions corresponding to the first dielectric block, and another two sets of rectangular feed slots are disposed at positions corresponding to the second dielectric block, the bandwidths of the first dielectric block and the second dielectric block can be finely adjusted through the four sets of rectangular feed slots, so as to improve the overall radiation performance of the dielectric resonator antenna.
Another embodiment of the present invention provides a communication device including the above dielectric resonator antenna.
The dielectric resonator antenna can be applied to devices of a 5G millimeter wave communication system, such as handheld mobile devices, and the following description is given by way of specific embodiments:
example one
Referring to fig. 1 to 3, a dielectric resonator antenna includes a first dielectric block 1, a second dielectric block 2, a metal layer 3, a dielectric layer 4, and a microstrip 5; the first dielectric block 1 and the second dielectric block 2 may be rectangular, circular, polygonal, or the like;
the dielectric layer 4 is arranged on one side of the metal layer 3; the first dielectric block 1 and the second dielectric block 2 are arranged on the other side of the metal layer 3; two feed gaps 6 are arranged on the metal layer 3 at positions corresponding to the first dielectric block 1 and the second dielectric block 2;
referring to fig. 4, the microstrip 5 is disposed on a side of the dielectric layer 4 away from the metal layer 3 and between the two feed gaps 6;
specifically, in an optional embodiment, the first dielectric block 1 and the second dielectric block 2 are cylindrical dielectric blocks;
referring to fig. 5, the first dielectric block 1 and the second dielectric block 2 are cylindrical dielectric blocks with the same size; the side surface of the first dielectric block 1 is tangent to the side surface of the second dielectric block 2; a tangent between the side surface of the first dielectric block 1 and the side surface of the second dielectric block 2 is parallel to two opposite side edges of the dielectric layer 4; in this embodiment, the dielectric layer 4 and the metal layer 3 are both regular rectangles; the tangent line is parallel to the corresponding side of the rectangle where the width is located; when the first dielectric block 1 and the second dielectric block 2 are square, one vertex of the first square is tangent to one vertex of the second square; one diagonal line of the first square is parallel to one diagonal line of the second square, and the other diagonal line of the second square are on the same straight line;
the microstrip 5 is parallel to a tangent between the side surface of the first dielectric block 1 and the side surface of the second dielectric block 2; namely, the microstrip 5 is vertical to the side where the corresponding length of the rectangle is;
the two feed gaps 6 are the same in size and are arranged in a step shape with the microstrip 5 as the center at positions corresponding to the first dielectric block 1 and the second dielectric block 2; one of the feeding gaps is positioned at the position where the first dielectric block 1 and the second dielectric block 2 are tangent; the two feeding gaps 6 are not completely covered by the first dielectric block 1 and the second dielectric block 2;
in an alternative embodiment, the principle of the dielectric resonator antenna in this embodiment is described with the radius of the cylindrical dielectric block being 1.3mm, the height being 3mm, and the dielectric constant being 9.4:
exciting the resonance modes of the first dielectric block 1 and the second dielectric block 2 through the two feed gaps 6 to form a plurality of adjacent resonances, and connecting the excited resonance frequency points to form a dielectric resonator antenna with super bandwidth;
the resonant modes include three types, and the first type mode is single dielectric block resonance:
setting the half-diameter of the antenna as a, the height as h and the dielectric constant as DK, according to a resonance formula corresponding to the dielectric block:
wherein m is a non-negative integer such as 0, 1 or 2; x'111.87 is a constant; the two resonances are obtained through calculation and are contained in a frequency band of 20-40 GHz; 22GHz corresponds to a resonant mode of TM11032GHz corresponds to a resonant mode of TM111；
The second type of mode is dual-medium common resonance:
as shown in fig. 6, when the side surfaces of the first dielectric block 1 and the second dielectric block 2 are tangent, the rectangular space formed by the two dielectric blocks and the surrounding air can be analogized to a cuboid dielectric block with a length of 4a, a width of 2a and a height of h; the dielectric constants of the two dielectric blocks are 9.4, the dielectric constant of air is 1, and the equivalent dielectric constant of the rectangular dielectric block, namely DK, can be obtained according to the area ratio of the air to the two dielectric blocksequivalent7.59; the resonance frequencies generated by the equivalent rectangular dielectric blocks are 26GHz, 29GHz and 37 GHz; as shown in fig. 7, it is a comparison graph of S parameters of the dielectric resonator antenna of the present invention and the corresponding rectangular dielectric resonator antenna; as can be seen from the figure, the resonance of the rectangular dielectric resonator antenna at 26GHz, 29GHz and 37GHz coincides with the dielectric resonator antenna of the present invention, and the mode of the above three resonance frequency points is from the quasi-rectangular dielectric block formed by the tangent of the side surfaces of the first dielectric block 1 and the second dielectric block 2 and the air;
the third type of mode is slot resonance:
by the slot resonance formula:
as shown in fig. 8, the overall length of the two feed slots 6 is L, and the resonant frequency in this mode can be obtained by combining the slot resonance formula to be 38.5 GHz;
as shown in fig. 9, which is an S parameter diagram of the dielectric antenna of the present invention, it can be seen that the resonant frequency of the above-mentioned modes can cover all frequency bands of 5G at present: n257(26-29.5GHz), n258(24.25-27.25GHz), n260(37-40GHz), n261(27.5-28.35 GHz).
Example two
The difference between the present embodiment and the first embodiment is that the present embodiment further includes a rectangular feeding slot 7;
referring to fig. 10, a rectangular feeding slot 7 is further disposed on the metal layer 3; the rectangular feed slots 7 are distributed on two sides of the two feed gaps 6;
specifically, the rectangular feed slots 7 include four groups; two groups of rectangular feed grooves 7 are respectively arranged on two sides of the two feed gaps 6, the two groups of rectangular feed grooves 7 are arranged on the metal layer 3 at positions corresponding to the first dielectric block 1, and the other two groups of rectangular feed grooves 7 are arranged on the metal layer 3 at positions corresponding to the second dielectric block 2.
EXAMPLE III
A communication device comprising a dielectric resonator antenna as described in the first embodiment or the second embodiment.
In summary, according to the dielectric resonator antenna and the communication device provided by the present invention, the dielectric layer is disposed on one side of the metal layer, the first dielectric block and the second dielectric block are disposed on the other side of the metal layer, and the metal layer is provided with two feeding slits and four groups of rectangular feeding slots; two feed gaps excite two dielectric blocks to radiate in different modes, the two feed gaps and a first dielectric block or a second dielectric block form first mode resonance, rectangular spaces formed by the two feed gaps and the first dielectric block and the second dielectric block form second mode resonance, the two feed gaps also form third mode resonance, three mode resonance jointly generated by the two gaps and the two dielectric blocks is realized, the bandwidth of the dielectric resonator can be finely adjusted through four groups of rectangular feed grooves, the frequency band coverage rate of the antenna module is greatly increased, meanwhile, a mode designed based on the dielectric resonator antenna is adopted, the structure of the antenna module is simplified, the broadband characteristic of the dielectric resonator antenna is realized, and meanwhile, the design complexity is reduced.
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. A dielectric resonator antenna is characterized by comprising a first dielectric block, a second dielectric block, a metal layer and a dielectric layer;
the dielectric layer is arranged on one side of the metal layer;
the first dielectric block and the second dielectric block are arranged on the other side of the metal layer;
and the metal layer is provided with two feed gaps at the positions corresponding to the first dielectric block and the second dielectric block.
2. The dielectric resonator antenna of claim 1, wherein the first dielectric block and the second dielectric block are cylindrical dielectric blocks of the same size;
and the side surface of the first dielectric block is tangent to the side surface of the second dielectric block.
3. A dielectric resonator antenna according to claim 2, wherein a tangent between a side of the first dielectric block and a side of the second dielectric block is parallel to two of the opposite sides of the dielectric layer.
4. A dielectric resonator antenna according to claim 2, wherein the cylindrical dielectric block has a radius of 1.3mm, a height of 3mm and a dielectric constant of 9.4.
5. A dielectric resonator antenna according to claim 2, further comprising a microstrip;
the microstrip is arranged on one side of the dielectric layer far away from the metal layer and is positioned between the two feed gaps.
6. A dielectric resonator antenna according to claim 5, characterized in that the microstrip is parallel to a tangent between the side of the first dielectric block and the side of the second dielectric block.
7. The dielectric resonator antenna of claim 5, wherein the two feed slots have the same size and are arranged in a step shape around the microstrip at positions corresponding to the first dielectric block and the second dielectric block; one of the feeding gaps is positioned at the position where the first dielectric block and the second dielectric block are tangent;
and the two feeding gaps are not completely covered by the first dielectric block and the second dielectric block.
8. A dielectric resonator antenna according to claim 1, wherein the metal layer is further provided with a rectangular feed slot;
the rectangular feed slots are distributed on two sides of the two feed gaps.
9. A dielectric resonator antenna according to claim 8, wherein the rectangular feed slots comprise four groups;
two groups of rectangular feed grooves are respectively arranged on two sides of the two feed gaps, the two groups of rectangular feed grooves are arranged on the metal layer at positions corresponding to the first dielectric blocks, and the other two groups of rectangular feed grooves are arranged on the metal layer at positions corresponding to the second dielectric blocks.
10. A communication device comprising a dielectric resonator antenna as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121066781.6U CN215600566U (en) | 2021-05-18 | 2021-05-18 | Dielectric resonator antenna and communication equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121066781.6U CN215600566U (en) | 2021-05-18 | 2021-05-18 | Dielectric resonator antenna and communication equipment |
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| Publication Number | Publication Date |
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| CN215600566U true CN215600566U (en) | 2022-01-21 |
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| CN202121066781.6U Active CN215600566U (en) | 2021-05-18 | 2021-05-18 | Dielectric resonator antenna and communication equipment |
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- 2021-05-18 CN CN202121066781.6U patent/CN215600566U/en active Active
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