CN214254724U - Dual-frequency dielectric resonant antenna, array thereof and mobile device - Google Patents
Dual-frequency dielectric resonant antenna, array thereof and mobile device Download PDFInfo
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- CN214254724U CN214254724U CN202022578526.1U CN202022578526U CN214254724U CN 214254724 U CN214254724 U CN 214254724U CN 202022578526 U CN202022578526 U CN 202022578526U CN 214254724 U CN214254724 U CN 214254724U
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Abstract
The utility model discloses a dual-frequency dielectric resonance antenna and an array and a mobile device thereof, wherein the antenna comprises a substrate, a first dielectric resonator, a second dielectric resonator and a microstrip feed line; the substrate comprises a first surface and a second surface which are opposite, the first surface is provided with a coupling feed gap, and the microstrip feed line is arranged on the second surface and matched with the coupling feed gap; the first dielectric resonator is arranged on the first surface and covers the coupling feed gap; the second dielectric resonator is arranged on the first dielectric resonator, and the projection of the second dielectric resonator on the substrate covers the coupling feed gap. The utility model discloses can realize the monomer dual-frenquency, improve the whole radiant efficiency of antenna when reducing the structure complexity.
Description
Technical Field
The utility model relates to an antenna technology field especially relates to a dual-frequency dielectric resonance antenna and array, mobile device thereof.
Background
At present, antennas applied to 4G communication systems or mobile terminals use metal patches or structures as radiators, so that the antennas can be integrated in the mobile terminals, and corresponding performances of the antennas can be reduced. After the 5G communication era, the demand of the mobile terminal for the number of antennas increases significantly, and particularly, in order to realize the application of millimeter wave communication to the mobile terminal, the designed millimeter wave antenna needs new materials, new forms and new processes to dominate the design of the 5G millimeter wave antenna. In 5G millimeter wave mobile terminal communication, the antenna itself needs to have conformal structural characteristics conforming to the industrial design structure of the mobile terminal device, so as to further improve the integration level of the mobile terminal device. Among which a microstrip patch antenna is one of the options.
A dual-frequency coaxial feed patch antenna applied to a communication system is shown in fig. 1 and 2. It can be seen that a typical dual-frequency coaxial feed patch antenna has two patch structures (a first patch resonator 102 and a second patch resonator 103) to form dual bands, and the feed structure is implemented using a coaxial feed 104 and a strip feed line 105, wherein the feed structure passes through a substrate 101 through a through hole penetrating the substrate 101. Therefore, a complex substrate stack is required for implementation, which results in a dual-band antenna that is not a unitary dual-band structure.
Therefore, although the microstrip patch antenna has the advantages of simple structure, clear principle, acceptable performance and the like, the microstrip patch antenna has the disadvantages of complex dielectric substrate laminated structure, non-integrated dual-frequency implementation mode and the like, and challenges are provided for the design of the current 5G mobile terminal millimeter wave conformal dual-frequency antenna.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the dual-frequency dielectric resonant antenna, the array thereof and the mobile device are provided, so that single dual-frequency can be realized, the structural complexity is reduced, and the integral radiation efficiency of the antenna is improved.
In order to solve the technical problem, the utility model discloses a technical scheme be: a dual-frequency dielectric resonance antenna comprises a substrate, a first dielectric resonator, a second dielectric resonator and a microstrip feed line; the substrate comprises a first surface and a second surface which are opposite, the first surface is provided with a coupling feed gap, and the microstrip feed line is arranged on the second surface and matched with the coupling feed gap; the first dielectric resonator is arranged on the first surface and covers the coupling feed gap; the second dielectric resonator is arranged on the first dielectric resonator, and the projection of the second dielectric resonator on the substrate covers the coupling feed gap.
Furthermore, one end of the microstrip feed line is matched with the coupling feed gap, and the other end of the microstrip feed line extends to the edge of the substrate and is provided with a feed port.
Furthermore, the coupling feed gap is I-shaped, and one end of the projection of the microstrip feed line is perpendicularly intersected with the center of the waist of the projection of the coupling feed gap.
The substrate comprises a substrate, a coupling feed gap and a ground layer, wherein the coupling feed gap is arranged on the substrate, and the ground layer is arranged on the first surface of the substrate and is provided with a first gap corresponding to the coupling feed gap; the first dielectric resonator is arranged on the grounding layer and covers the first gap.
Further, the size of the second dielectric resonator is larger than that of the first dielectric resonator.
Further, the first dielectric resonator and the second dielectric resonator are both rectangular.
Further, the length of the second dielectric resonator is greater than the length of the first dielectric resonator, and the width of the second dielectric resonator is greater than the width of the first dielectric resonator.
The utility model also provides a dual-frenquency dielectric resonator antenna array, as above including at least two dual-frenquency dielectric resonator antenna, two at least dual-frenquency dielectric resonator antenna set up on same base plate.
Further, the at least two dual-frequency dielectric resonant antennas are linearly arranged, and the distance between two adjacent dual-frequency dielectric resonant antennas is half of the wavelength.
The utility model also provides a mobile device, include as above dual-frenquency dielectric resonator antenna, or as above conformal dual-frenquency dielectric resonator antenna array.
The beneficial effects of the utility model reside in that: radio frequency signals are fed in from a microstrip feeder line, two dielectric resonators stacked above the microstrip feeder line are subjected to coupling feeding after passing through a coupling feeding gap, and the two dielectric resonators can respectively excite a fundamental mode and a higher-order mode through the excitation of the coupling feeding gap, so that two working frequency bands are generated. The utility model can realize single body double frequency, i.e. the structure is integrated and can realize two working frequency bands, thus reducing the design complexity; the working states of a fundamental mode and a high-order mode can be excited, and the design of an antenna feed structure is simplified; the integral radiation efficiency of the antenna can be greatly improved; meanwhile, the production cost of the millimeter wave antenna can be reduced.
Drawings
Fig. 1 is a top view of a prior art dual-frequency coaxial feed patch antenna;
fig. 2 is a cross-sectional view of a dual-frequency coaxial feed patch antenna of the prior art;
fig. 3 is a schematic structural diagram of a dual-band dielectric resonator antenna according to the present invention;
fig. 4 is a schematic top view of a dual-band dielectric resonator antenna according to a first embodiment of the present invention;
fig. 5 is a schematic side view of a dual-band dielectric resonator antenna according to a first embodiment of the present invention;
fig. 6 is a schematic view of an electric field distribution of a fundamental mode according to a first embodiment of the present invention;
fig. 7 is a schematic view of an electric field distribution of a higher order mode according to a first embodiment of the present invention;
fig. 8 is a schematic return loss diagram of a dual-band dielectric resonator antenna according to a first embodiment of the present invention;
fig. 9 is a schematic gain diagram of a dual-band dielectric resonator antenna according to a first embodiment of the present invention;
fig. 10 is a schematic view of the radiation efficiency of a dual-band dielectric resonator antenna according to a first embodiment of the present invention.
Description of reference numerals:
101. a substrate; 102. a first patch resonator; 103. a second patch resonator; 104. feeding electricity coaxially; 105. a strip feed line;
1. a substrate; 2. a first dielectric resonator; 3. a second dielectric resonator; 4. a microstrip feed line; 5. coupling a feed gap; 6. a ground plane; 7. a first slit.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made in conjunction with the embodiments and the accompanying drawings.
Referring to fig. 3, a dual-band dielectric resonator antenna includes a substrate, a first dielectric resonator, a second dielectric resonator, and a microstrip feed line; the substrate comprises a first surface and a second surface which are opposite, the first surface is provided with a coupling feed gap, and the microstrip feed line is arranged on the second surface and matched with the coupling feed gap; the first dielectric resonator is arranged on the first surface and covers the coupling feed gap; the second dielectric resonator is arranged on the first dielectric resonator, and the projection of the second dielectric resonator on the substrate covers the coupling feed gap.
From the above description, the beneficial effects of the present invention are: the single double-frequency can be realized, and the design complexity is reduced; the working states of a fundamental mode and a high-order mode can be excited, and the design of an antenna feed structure is simplified; the integral radiation efficiency of the antenna can be greatly improved; the production cost of the millimeter wave antenna can be reduced.
Furthermore, one end of the microstrip feed line is matched with the coupling feed gap, and the other end of the microstrip feed line extends to the edge of the substrate and is provided with a feed port.
Furthermore, the coupling feed gap is I-shaped, and one end of the projection of the microstrip feed line is perpendicularly intersected with the center of the waist of the projection of the coupling feed gap.
As can be seen from the above description, the radio frequency signal is fed through the feed port, and then the two dielectric resonators are coupled and fed through the microstrip feed line and the coupling feed slot.
The substrate comprises a substrate, a coupling feed gap and a ground layer, wherein the coupling feed gap is arranged on the substrate, and the ground layer is arranged on the first surface of the substrate and is provided with a first gap corresponding to the coupling feed gap; the first dielectric resonator is arranged on the grounding layer and covers the first gap.
Further, the size of the second dielectric resonator is larger than that of the first dielectric resonator.
As is apparent from the above description, the second dielectric resonator and the first dielectric resonator can be made to cooperate to resonate in another frequency band.
Further, the first dielectric resonator and the second dielectric resonator are both rectangular.
Further, the length of the second dielectric resonator is greater than the length of the first dielectric resonator, and the width of the second dielectric resonator is greater than the width of the first dielectric resonator.
The utility model also provides a dual-frenquency dielectric resonator antenna array, as above including at least two dual-frenquency dielectric resonator antenna, two at least dual-frenquency dielectric resonator antenna set up on same base plate.
Further, the at least two dual-frequency dielectric resonant antennas are linearly arranged, and the distance between two adjacent dual-frequency dielectric resonant antennas is half of the wavelength.
As can be seen from the above description, the distance between the antennas depends on the operating frequency, and is preferably one-half of the wavelength of the electromagnetic wave.
The utility model also provides a mobile device, include as above dual-frenquency dielectric resonator antenna, or as above conformal dual-frenquency dielectric resonator antenna array.
Example one
Referring to fig. 3 to 10, a first embodiment of the present invention is: a dual-frequency dielectric resonance antenna, which can be applied to a 5G communication system, is shown in FIG. 3, and comprises a substrate 1, a first dielectric resonator 2, a second dielectric resonator 3 and a microstrip feed line 4; the substrate 1 comprises a first surface and a second surface which are opposite, the first surface is provided with a coupling feed gap 5, and the microstrip feed line 4 is arranged on the second surface and matched with the coupling feed gap 5; the first dielectric resonator 2 is arranged on the first surface, and the second dielectric resonator 3 is arranged on the first dielectric resonator 1 in a stacked manner. Wherein, the substrate is a dielectric substrate.
As shown in fig. 4, the first dielectric resonator 2 covers the coupling feed slot 5, and the projection of the second dielectric resonator 3 on the substrate 1 covers the coupling feed slot 5.
Further, in this embodiment, the coupling feed slot 5 is in an i shape (or in an H shape), and one end of the projection of the microstrip feed line 4 on the substrate 1 perpendicularly intersects with the center of the waist of the projection of the coupling feed slot 5 on the substrate 1, that is, perpendicularly intersects with the middle of the "worker". The other end of the microstrip feed line 4 extends to the edge of the substrate 1 and is provided with a feed port (not shown).
Further, as shown in fig. 5, a ground layer 6 is further disposed on the first surface of the substrate 1, and a first slot 7 corresponding to the coupling feed slot 5 is disposed in the ground layer 6. The first dielectric resonator 2 is disposed on the ground layer 6 and covers the first slot 7.
That is, the first surface of the substrate is provided with a groove serving as a feed coupling gap, and the ground layer is provided with a slot (i.e., a first slot) corresponding to the groove on the first surface. And a first dielectric resonator is arranged on the ground plane and covers the slot.
Preferably, the size of the second dielectric resonator is larger than the size of the first dielectric resonator. In this embodiment, the first dielectric resonator and the second dielectric resonator are both rectangular parallelepiped, and the length and the width of the second dielectric resonator are respectively greater than the length and the width of the first dielectric resonator. That is, the projection of the second dielectric resonator on the substrate may completely cover the projection of the first dielectric resonator on the substrate.
When the device works, radio-frequency signals are fed in from a microstrip feeder line through a feed port, the first dielectric resonator and the second dielectric resonator which are stacked above the feed port are subjected to coupling feed after passing through a coupling feed gap, and the first dielectric resonator and the second dielectric resonator can respectively excite a fundamental mode and a higher-order mode through the excitation of the coupling feed gap, so that two working frequency bands are generated.
The excitation of the fundamental mode refers to designing the equivalent height of the whole resonator at the designed low-frequency point, so that the resonator is excited out of the fundamental mode and is at the frequency point of the low frequency band. The excitation of the higher mode refers to designing the equivalent height of the whole resonator at the designed high-frequency point, so that the higher mode is excited and the frequency point is in the high-frequency band. In this embodiment, the electric field distribution of the fundamental mode is as shown in fig. 6, and the electric field distribution of the higher order mode is as shown in fig. 7, where the overall structure in fig. 6 and 7 is the stacked first dielectric resonator and second dielectric resonator, and it can be seen that the operation mode of the first dielectric resonator is the fundamental mode, and the operation mode of the second dielectric resonator is the higher order mode.
Fig. 8-10 are a return loss diagram, a gain diagram, and a radiation efficiency diagram of the dual-band dielectric resonator antenna of this embodiment, respectively, and it can be seen that the dual-band dielectric resonator antenna has two resonance points, which can generate two frequency bands, and the two frequency bands have higher antenna gain and antenna radiation efficiency.
The dielectric resonance structure of the embodiment can realize single double-frequency, and the design complexity is reduced; the working states of a fundamental mode and a high-order mode can be excited, and the design of an antenna feed structure is simplified; the integral radiation efficiency of the antenna can be greatly improved; meanwhile, the production cost of the millimeter wave antenna can be reduced.
To sum up, the utility model provides a dual-frequency dielectric resonator antenna and array, mobile device thereof can realize single dual-frequency, reduce the design complexity; the working states of a fundamental mode and a high-order mode can be excited, and the design of an antenna feed structure is simplified; the integral radiation efficiency of the antenna can be greatly improved; meanwhile, the production cost of the millimeter wave antenna can be reduced.
The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.
Claims (10)
1. A dual-frequency dielectric resonance antenna is characterized by comprising a substrate, a first dielectric resonator, a second dielectric resonator and a microstrip feed line; the substrate comprises a first surface and a second surface which are opposite, the first surface is provided with a coupling feed gap, and the microstrip feed line is arranged on the second surface and matched with the coupling feed gap; the first dielectric resonator is arranged on the first surface and covers the coupling feed gap; the second dielectric resonator is arranged on the first dielectric resonator, and the projection of the second dielectric resonator on the substrate covers the coupling feed gap.
2. The dual-band dielectric resonator antenna of claim 1, wherein one end of the microstrip feed line is matched with the coupling feed slot, and the other end of the microstrip feed line extends to the edge of the substrate and is provided with a feed port.
3. The dual-band dielectric resonator antenna of claim 1, wherein the coupling feed slot is i-shaped, and one end of the projection of the microstrip feed line perpendicularly intersects with the center of the waist of the projection of the coupling feed slot.
4. The dual-band dielectric resonator antenna of claim 1, further comprising a ground plane disposed on the first surface of the substrate, wherein a first slot corresponding to the coupling feed slot is disposed in the ground plane; the first dielectric resonator is arranged on the grounding layer and covers the first gap.
5. The dual-band dielectric resonator antenna of claim 1, wherein the size of the second dielectric resonator is larger than the size of the first dielectric resonator.
6. The dual-band dielectric resonator antenna of claim 1, wherein the first dielectric resonator and the second dielectric resonator each have a rectangular parallelepiped shape.
7. The dual-band dielectric resonator antenna of claim 6, wherein the length of the second dielectric resonator is greater than the length of the first dielectric resonator, and the width of the second dielectric resonator is greater than the width of the first dielectric resonator.
8. A dual-band dielectric resonator antenna array comprising at least two dual-band dielectric resonator antennas according to any one of claims 1 to 7, said at least two dual-band dielectric resonator antennas being disposed on the same substrate.
9. The array of claim 8, wherein the at least two dual-band dielectric resonator antennas are linearly arranged, and a distance between two adjacent dual-band dielectric resonator antennas is a half wavelength.
10. A mobile device comprising a dual-frequency dielectric resonant antenna according to any of claims 1-7, or a conformal dual-frequency dielectric resonant antenna array according to claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022578526.1U CN214254724U (en) | 2020-11-10 | 2020-11-10 | Dual-frequency dielectric resonant antenna, array thereof and mobile device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022578526.1U CN214254724U (en) | 2020-11-10 | 2020-11-10 | Dual-frequency dielectric resonant antenna, array thereof and mobile device |
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| Publication Number | Publication Date |
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| CN214254724U true CN214254724U (en) | 2021-09-21 |
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| CN202022578526.1U Active CN214254724U (en) | 2020-11-10 | 2020-11-10 | Dual-frequency dielectric resonant antenna, array thereof and mobile device |
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