CN116315693A - Dual-polarized differential dielectric resonator antenna with filtering function - Google Patents
Dual-polarized differential dielectric resonator antenna with filtering function Download PDFInfo
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- CN116315693A CN116315693A CN202310480857.7A CN202310480857A CN116315693A CN 116315693 A CN116315693 A CN 116315693A CN 202310480857 A CN202310480857 A CN 202310480857A CN 116315693 A CN116315693 A CN 116315693A
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- 238000001914 filtration Methods 0.000 title claims abstract description 24
- 239000002184 metal Substances 0.000 claims abstract description 141
- 239000000758 substrate Substances 0.000 claims abstract description 24
- 230000009977 dual effect Effects 0.000 claims description 17
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000005855 radiation Effects 0.000 abstract description 22
- 230000005684 electric field Effects 0.000 abstract description 5
- 238000004891 communication Methods 0.000 abstract description 4
- 238000000465 moulding Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 238000002955 isolation Methods 0.000 description 5
- 238000004088 simulation Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005388 cross polarization Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0485—Dielectric resonator antennas
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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
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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
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- 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
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention belongs to the technical field of microwave communication, and particularly relates to a dual-polarized differential dielectric resonator antenna with a filtering function. The invention is formed by orthogonal combination of two linearly polarized antennas with the same structure. The microstrip differential feeder line is designed at the bottom of the dielectric substrate and is connected with a dipole structure designed on the virtual ground of the dielectric resonator through a metal through hole and a bonding pad. The radiation structure consists of three parts, namely: dipoles, dielectric resonators are dielectric patch resonators placed on top of the dielectric resonators. Resonant modes corresponding to the three radiators in the working frequency band of the antenna respectively: dipoles1/2 wavelength resonance of a dielectric resonator
Mode, dielectric patch resonator
And (5) molding. At the low-frequency radiation zero point, a dipole circuit structure on the virtual ground introduces the radiation zero point; electric field generated by dipole structure at high-frequency radiation zero point and dielectric patch resonator
The radiation zero points are led in by mode offset, so that the function of the filtering antenna with simple structure is realized.
Description
Technical Field
The invention belongs to the technical field of microwave communication, and particularly relates to a dual-polarized differential dielectric resonator antenna with a filtering function.
Background
The dielectric resonator has the advantages of low loss, small size, high radiation efficiency, flexible design and the like, and is widely applied to the design of radio frequency circuit devices. The filter antenna breaks through the design method of the traditional filter and antenna cascade connection, integrates the filtering function and the radiation function into one device, improves the signal selection capability and the clutter signal suppression capability of the antenna without affecting the radiation characteristic of the antenna, and reduces the size and the insertion loss. The dual-polarized antenna can transmit two mutually orthogonal electromagnetic wave signals which are not interfered with each other, so that the channel capacity is increased, the frequency spectrum efficiency of a communication link is improved, the multipath fading problem is improved, and the dual-polarized antenna is widely applied to the fields of base stations, satellite communication and the like. The dipole antenna has the advantages of small volume, low cost, light weight and the like, and is widely applied to the design of dual-polarized antennas. Compared with single-ended feed, the differential feed scheme has the advantages of high linearity, common mode rejection, easiness in integration and the like.
Some existing dual-polarized antennas are mainly implemented by magnetic electric dipoles, patch antennas and the like, and generally suffer from the defects of large volume, high section and the like. Some of the existing dual polarized antennas based on dielectric resonators use the traditional means of cascading filters and antennas to achieve the filtering effect, resulting in larger volumes and large insertion loss. Or single-ended feed makes port isolation necessary to be optimized by other means, increasing antenna design difficulty. There is no report on dual polarized dielectric resonator antennas which integrate differential feed and filter antennas. Therefore, the dual-polarized differential dielectric resonator antenna with the filtering function has important value and significance.
Disclosure of Invention
The invention provides a dual-polarized differential dielectric resonator antenna with a filtering function aiming at the problems existing in the prior art. The invention designs the dipole on the virtual ground of the dielectric resonator as a radiator and a feed structure, and utilizes the dipole antenna to counteract the electric field of the dielectric resonator to form a radiation zero point, and utilizes the dielectric stacking technology to improve the bandwidth and the matching effect.
In order to achieve the aim of the invention, the technical scheme adopted by the invention is as follows:
a dual polarized differential dielectric resonator antenna with filtering function comprises a dielectric substrate; a top metal layer is arranged on the upper surface of the dielectric substrate; the top metal layer is provided with a first round groove and a second round groove; the upper surface of the dielectric substrate is provided with a first top-layer metal bonding pad and a second top-layer metal bonding pad; the first top-layer metal bonding pad is arranged in the first round groove; the second top-layer metal bonding pad is arranged in the second round groove; the lower surface of the dielectric substrate is provided with a first bottom metal strip and a second bottom metal strip; a rectangular dielectric resonator is arranged on the top metal layer; a dielectric patch resonator is arranged on the rectangular dielectric resonator; a first metal strip is arranged on a first direction symmetry plane in the rectangular dielectric resonator; a second metal strip is arranged on a second direction symmetry plane in the rectangular dielectric resonator; the lower surface of the rectangular dielectric resonator is provided with a first metal bonding pad and a second metal bonding pad; the dielectric substrate is provided with a first metal through hole and a second metal through hole in a penetrating mode; the first metal bonding pad is connected with the first bottom metal strap through a first metal through hole; the second metal bonding pad is connected with a second bottom metal strap through a second metal through hole; the first bottom metal strip, the first metal through hole and the second top metal pad are of a single polarized antenna structure forming a dual polarized differential dielectric resonator antenna; the second bottom metal strip, the second metal through hole and the first top metal pad are used for forming another single-polarized antenna structure of the dual-polarized differential dielectric resonator antenna.
Further, as a preferable technical scheme of the invention, the first direction symmetry plane and the second direction symmetry plane in the rectangular dielectric resonator are both differential feed virtual ground.
Further as a preferred technical solution of the present invention, the first bottom metal strip and the first metal strip, and the second bottom metal strip and the second metal strip are combined to form a stepped impedance form or a stepped form through different widths.
Further as a preferable technical scheme of the invention, the first metal strip forms a feeder end of a dipole and two 1/2 wavelength resonance arms; the second metal strip forms the feed line end of the dipole and two 1/2 wavelength resonating arms.
Further as a preferable technical scheme of the invention, the first circular groove, the first top layer metal bonding pad and the second metal bonding pad are concentric; the second circular groove, the second top layer metal bonding pad and the first metal bonding pad are concentric.
Further, as a preferable technical scheme of the invention, the first bottom metal strap and the second bottom metal strap are respectively used as input ends of the antenna.
Compared with the prior art, the dual-polarized differential dielectric resonator antenna with the filtering function has the following technical effects:
(1) In the structure of the dual-polarized differential dielectric resonator antenna with the filtering function, the dipole structure is used as a radiator and a feeder line at the same time, and radiation zero points are introduced by utilizing mutual cancellation of the dipole structure and the radiation fields of the dipole and the dielectric resonator, so that the filtering antenna function with a simple structure is realized.
(2) The invention can realize high isolation of the port by utilizing the differential feed mode without introducing additional structures, thereby further simplifying the structure of the antenna.
(3) According to the invention, the dielectric patch resonator with higher dielectric constant is loaded at the top end of the dielectric resonator, so that the overall passband frequency band is reduced, and the size of the device is reduced; the design space of the dielectric resonator is fully utilized, and dipoles are designed on two orthogonal virtual ground of the dielectric resonator, so that dual polarization is realized.
(4) The invention has the characteristics of small volume, simple structure, excellent performance, high integration level and the like.
Drawings
Fig. 1 is a structural perspective view of a dual polarized differential dielectric resonator antenna with filtering function according to the present invention;
FIG. 2 is a schematic diagram of the structure of a dipole of the present invention;
FIG. 3 is a graph showing the electric field distribution of the main mode of the dielectric resonator according to the present invention
FIG. 4 is a schematic diagram of a bond pad structure at the bottom of a dielectric resonator of the present invention;
FIG. 5 is a schematic diagram of the structure of the upper surface metal layer and the bonding pad of the substrate according to the present invention;
FIG. 6 is a schematic diagram of a microstrip feed line structure on the lower surface of the substrate of the present invention;
fig. 7 is a simulation diagram of reflection coefficients obtained at two ports of the dual polarized antenna of the present invention;
fig. 8 is a simulation diagram of transmission coefficients between two ports of the dual polarized antenna of the present invention;
FIG. 9 is a simulation of the in-band gain curve of the present invention;
FIG. 10 is a simulation graph of the in-band radiation efficiency of the present invention;
FIG. 11 is an E-plane, H-plane pattern at 3.2GHz according to the present invention;
FIG. 12 is an E-plane, H-plane pattern at 3.5GHz according to the present invention;
FIG. 13 is an E-plane, H-plane pattern at 3.9GHz according to the present invention;
in the attached drawings, 1, a dielectric substrate; 11. a top metal layer; 12. a first underlying metal strap; 13. a second underlying metal strap; 111. a first circular groove; 112. a first top metal pad; 113. a second circular groove; 114. a second top metal pad; 2. a rectangular dielectric resonator; 21. a dielectric patch resonator; 22. a first metal strap; 23. a second metal strap; 24. a second metal pad; 25. a first metal pad; 3. a first metal via; 4. and a second metal via.
Detailed Description
The invention is further explained in the following detailed description with reference to the drawings so that those skilled in the art can more fully understand the invention and can practice it, but the invention is explained below by way of example only and not by way of limitation.
As shown in fig. 1 to 6, a dual polarized differential dielectric resonator antenna with a filtering function includes a dielectric substrate 1; the upper surface of the dielectric substrate 1 is provided with a top metal layer 11; the top metal layer 11 is provided with a first round groove 111 and a second round groove 113; the upper surface of the dielectric substrate 1 is provided with a first top-layer metal pad 112 and a second top-layer metal pad 114; the first top metal pad 112 is disposed in the first circular groove 111; the second top metal pad 114 is disposed in the second circular groove 113; the lower surface of the dielectric substrate 1 is provided with a first bottom metal strip 12 and a second bottom metal strip 13; a rectangular dielectric resonator 2 is arranged on the top metal layer 11; a dielectric patch resonator 21 is arranged on the rectangular dielectric resonator 2; a first metal strip 22 is arranged on a first direction symmetry plane in the rectangular dielectric resonator 2; a second metal strip 23 is arranged on a second direction symmetry plane in the rectangular dielectric resonator 2; the lower surface of the rectangular dielectric resonator 2 is provided with a first metal pad 25 and a second metal pad 24; the dielectric substrate 1 is provided with a first metal through hole 3 and a second metal through hole 4 in a penetrating way; the first metal pad 25 is connected with the first bottom metal strap 12 through the first metal through hole 3; the second metal pad 24 is connected with the second bottom metal strap 13 through the second metal through hole 4; the first bottom metal strip 12, the first metal through hole 3 and the second top metal pad 114, and the first metal pad 25, the first metal strip 22, the rectangular dielectric resonator 2 and the dielectric patch resonator 21 form a single-polarized antenna structure of the dual-polarized differential dielectric resonator antenna; the second bottom metal strip 13, the second metal through hole 4, the first top metal pad 112, the second metal pad 24, the second metal strip 23, the rectangular dielectric resonator 2 and the dielectric patch resonator 21 are another single-polarized antenna structure forming a dual-polarized differential dielectric resonator antenna.
The first direction symmetry plane and the second direction symmetry plane in the rectangular dielectric resonator 2 are both differential feed virtual ground.
The first and second bottom metal strips 12, 22, 13 and 23 form a stepped impedance pattern or a stepped pattern by combining different widths.
The first metal strap 22 constitutes the feed line end of the dipole and two 1/2 wavelength resonating arms; the second metal strip 23 constitutes the feed line end of the dipole and two 1/2 wavelength resonating arms.
The first circular groove 111, the first top metal pad 112 and the second metal pad 24 are concentric; the second circular groove 113, the second top metal pad 114 and the first metal pad 25 are concentric.
The first 12 and second 13 bottom metal strips serve as the input terminals of the antenna, respectively.
In specific implementation, referring to fig. 1, a schematic structural perspective view of a dual-polarized differential dielectric resonator antenna with filtering function according to the present invention is formed by orthogonally combining two linearly polarized antennas with the same structure. For a linearly polarized antenna part on the first directional symmetry plane (virtual ground of the main mode TE11 delta mode) of the rectangular dielectric resonator 2, a pair of differential microstrip feeds, i.e., first underlying metal strips 12, provide energy of the same magnitude 180 ° out of phase; the top metal layer 11 serves as an antenna reflection ground; the first metal through hole 3 which is a metal through hole designed in the dielectric substrate 1, the second top metal bonding pad 114 which is designed on the upper surface of the dielectric substrate 1, and the first metal bonding pad 25 which is designed on the bottom surface of the rectangular dielectric resonator 2 are used for connecting microstrip feed of the bottom surface of the substrate and the first metal strip 22 which is a dipole structure designed on the first direction symmetry plane of the rectangular dielectric resonator 2. The rectangular dielectric resonator 2 has dimensions a×a×h, a relative dielectric constant of 5.7, and a dielectric loss of 0.0008. The dielectric constant of the dielectric patch resonator 21 was 108, and the dielectric loss was 0.0007.
The dipole structure is used as a radiator to provide a first resonance point, and the dipoles are used as feeder lines to be respectively coupled and excited in the dielectric resonator
Mode, & gt>
Mode, forming the second and third resonance points. Electric field on dipole antenna and dielectric resonator>
Mode mutual cancellation produces a radiation zero at low frequencies, and a dielectric resonator +.>
The modes cancel each other out creating a radiation null at high frequencies. The dielectric patch resonator optimizes the matching degree, reduces the overall passband frequency and reduces the size of the device.
The dimensions of each part are optimized according to the embodiment of the invention, and each parameter is specifically shown in table 1.
TABLE 1 parameter size
As shown in fig. 7, the 10dB working frequency band of the dual-polarized antenna provided by the embodiment of the invention is obtained through simulation to cover 3.16GHz-3.96GHz, and the impedance bandwidth is 21.8%. FIG. 8 shows port isolation as high as-59 dB or less, and the radiation gain graph of FIG. 9 shows an in-band gain range of 6.0dBi-7.5dBi, with one radiation zero at each of the low and high frequency ends at 2.66GHz and 4.26GHz, respectively. Fig. 10 shows that the in-band radiation efficiency is above 90%. FIG. 11 is a diagram of E-plane and H-plane at 3.2GHz, respectively, with a maximum gain of 6.25dBi; FIG. 12 is a diagram of E-plane and H-plane at 3.5GHz, respectively, with maximum gain up to 6.82dBi; FIG. 13 is a graph of E and H at 3.9GHz, respectively, with a maximum gain of 7.48dBi; the cross polarization of the E surface and the H surface is extremely small and can reach below-45 dB. The performance of high port isolation and small cross polarization benefit from the differential feed method.
The invention provides a dual-polarized differential dielectric resonator antenna with a filtering function, which is formed by orthogonal combination of two linearly polarized antennas with the same structure. The microstrip differential feeder line is designed at the bottom of the dielectric substrate and is connected with a dipole structure designed on the virtual ground of the dielectric resonator through a metal through hole and a bonding pad. The radiation structure consists of three parts, namely: dipoles, dielectric resonators are dielectric patch resonators placed on top of the dielectric resonators. Resonant modes corresponding to the three radiators in the working frequency band of the antenna respectively: 1/2 wavelength resonance of dipoles, dielectric resonator
Mode, dielectric patch resonator +.>
And (5) molding. At the low-frequency radiation zero point, a dipole circuit structure on the virtual ground introduces the radiation zero point; electric field generated by dipole structure at high-frequency radiation zero point and dielectric patch resonator>
The radiation zero points are led in by mode offset, so that the function of the filtering antenna with simple structure is realized. The port high isolation can be realized by utilizing a differential feed mode without introducing an additional structure, and the method is further simplifiedThe structure of the antenna is simplified. The dielectric patch resonator with higher dielectric constant is loaded at the top end of the dielectric resonator, so that the passband frequency is reduced, and the size of the device is reduced; the design space of the dielectric resonator is fully utilized, and dipole structures are designed on two orthogonal virtual ground of the dielectric resonator, so that dual polarization is realized. Compared with the prior art, the invention has the characteristics of small volume, simple structure, excellent performance, high integration level and the like.
While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (6)
1. A dual polarized differential dielectric resonator antenna with filtering function comprises a dielectric substrate (1); the dielectric substrate is characterized in that a top metal layer (11) is arranged on the upper surface of the dielectric substrate (1); the top metal layer (11) is provided with a first round groove (111) and a second round groove (113); the upper surface of the dielectric substrate (1) is provided with a first top-layer metal bonding pad (112) and a second top-layer metal bonding pad (114); the first top-layer metal bonding pad (112) is arranged in the first round groove (111); the second top-layer metal bonding pad (114) is arranged in the second round groove (113); the lower surface of the dielectric substrate (1) is provided with a first bottom metal strip (12) and a second bottom metal strip (13); a rectangular dielectric resonator (2) is arranged on the top metal layer (11); a dielectric patch resonator (21) is arranged on the rectangular dielectric resonator (2); a first metal strip (22) is arranged on a first direction symmetry plane in the rectangular dielectric resonator (2); a second metal strip (23) is arranged on a second direction symmetry plane in the rectangular dielectric resonator (2); the lower surface of the rectangular dielectric resonator (2) is provided with a first metal bonding pad (25) and a second metal bonding pad (24); the dielectric substrate (1) is provided with a first metal through hole (3) and a second metal through hole (4) in a penetrating mode; the first metal bonding pad (25) is connected with the first bottom metal strip (12) through the first metal through hole (3); the second metal bonding pad (24) is connected with a second bottom metal strip (13) through a second metal through hole (4); the first bottom metal strip (12), the first metal through hole (3) and the second top metal pad (114), and the first metal pad (25), the first metal strip (22), the rectangular dielectric resonator (2) and the dielectric patch resonator (21) form a single polarized antenna structure of the dual polarized differential dielectric resonator antenna; the second bottom metal strip (13), the second metal through hole (4) and the first top metal pad (112), and the second metal pad (24), the second metal strip (23), the rectangular dielectric resonator (2) and the dielectric patch resonator (21) form another single-polarized antenna structure of the dual-polarized differential dielectric resonator antenna.
2. The dual polarized differential dielectric resonator antenna with filtering function according to claim 1, wherein the first direction symmetry plane and the second direction symmetry plane in the rectangular dielectric resonator (2) are both differential feed virtual ground.
3. A dual polarized differential dielectric resonator antenna with filtering function according to claim 1, characterized in that the first bottom metal strip (12) and the first metal strip (22), the second bottom metal strip (13) and the second metal strip (23) are combined by different widths to form a stepped impedance form or a stepped form.
4. A dual polarized differential dielectric resonator antenna with filtering function according to claim 3, characterized in that the first metal strip (22) constitutes the feed line end of the dipole and two 1/2 wavelength resonating arms; the second metal strip (23) forms the feed line end of the dipole and two 1/2 wavelength resonating arms.
5. The dual polarized differential dielectric resonator antenna with filtering function according to claim 1, characterized in that the first circular groove (111), the first top metal pad (112), the second metal pad (24) are concentric; the second round groove (113), the second top-layer metal bonding pad (114) and the first metal bonding pad (25) are concentric.
6. A dual polarized differential dielectric resonator antenna with filtering function according to claim 1, characterized in that the first (12) and second (13) bottom metal strips are each used as an input of the antenna.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310480857.7A CN116315693A (en) | 2023-04-28 | 2023-04-28 | Dual-polarized differential dielectric resonator antenna with filtering function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310480857.7A CN116315693A (en) | 2023-04-28 | 2023-04-28 | Dual-polarized differential dielectric resonator antenna with filtering function |
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