CN114566794A - 5G millimeter wave dual-polarization magnetoelectric dipole filtering antenna - Google Patents
5G millimeter wave dual-polarization magnetoelectric dipole filtering antenna Download PDFInfo
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- CN114566794A CN114566794A CN202210238834.0A CN202210238834A CN114566794A CN 114566794 A CN114566794 A CN 114566794A CN 202210238834 A CN202210238834 A CN 202210238834A CN 114566794 A CN114566794 A CN 114566794A
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0053—Selective devices used as spatial filter or angular sidelobe filter
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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
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
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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
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Abstract
A5G millimeter wave dual-polarization magnetoelectric dipole filtering antenna relates to radio frequency communication. The dielectric substrate comprises a top dielectric substrate, a bottom dielectric substrate and an intermediate bonding layer; the upper surface of the top dielectric substrate is printed with a radiator structure, a cross-shaped metal patch and an annular metal structure, the radiator structure is connected to the lower surface of the top dielectric substrate, the cross-shaped metal patch is connected to a feed microstrip line of the bottom dielectric slab, and the annular metal structure surrounds the radiator structure; the lower surface of the top layer dielectric substrate is printed with a metal ground, the metal ground is loaded with a circular gap, the upper surface of the bottom layer dielectric substrate is printed with a circular patch, the lower surface is printed with two groups of one-to-two feed microstrip lines, and the tail end of one microstrip line is printed with a branch line; the length of the electric dipole and the height of the magnetic dipole control a low-frequency radiation zero point; the annular metal structure and the differential circuit control the high-frequency radiation zero point. Simple structure effectively promotes out-of-band rejection level, and high-frequency out-of-band rejection is effectual. And an additional filter circuit is not introduced to realize a good band-pass filtering effect.
Description
Technical Field
The invention relates to the field of radio frequency communication, in particular to a 5G millimeter wave dual-polarization magnetoelectric dipole filter antenna with high roll-off filter characteristics.
Background
The 5G millimeter wave technology is an important technology in 5G application, and has the unique advantages of large bandwidth, low air interface delay, flexible and elastic air interface configuration and the like, so that the requirements of future wireless communication on system capacity, transmission rate, differentiated application and the like can be met.
Compared with a patch antenna and a waveguide slot antenna, the magnetoelectric dipole antenna has the advantages of large bandwidth, low cross polarization, small back lobe and the like, so that the magnetoelectric dipole antenna is widely applied to a wireless communication system; the feeding modes are generally three, namely L-shaped metal strip feeding, microstrip slot coupling feeding and differential port feeding. However, when the dual-polarization 5G millimeter wave is applied, the design of the three feeding modes has certain difficulty, firstly, the feeder lines in the dual-polarization situation are not uniform in height and need to use multilayer dielectric plates, secondly, the orthogonal feeder lines in the dual-polarization situation intersect and need to use jumper wires, and thirdly, the problem that the inner conductors of the SMA connectors cannot be directly connected and welded when the size of the millimeter wave antenna is reduced is solved, so that how to design a good feeding system becomes a key point of attention of researchers.
In recent years, a filtering antenna has attracted attention because of its advantages such as high efficiency and small insertion loss; the design method is roughly divided into two types, the first type is to cascade an antenna and a filter, and the filter has larger size and is not beneficial to being applied to a millimeter wave system; the second method adds an additional parasitic structure to generate filtering performance, and the design difficulty is large. Therefore, it is important for researchers to find out whether the filtering performance can be achieved by the characteristics of the antenna itself without using an additional filtering circuit.
Disclosure of Invention
The invention aims to overcome the defects of the antenna technology and provide a 5G millimeter wave dual-polarization magnetoelectric dipole filter antenna, which utilizes the port isolation band-pass characteristic and the square ring structure of a differential circuit, not only realizes the filter characteristic of higher roll-off, but also ensures that no additional insertion loss and redundant structure are introduced, and meanwhile, the structure of the antenna is simpler. The antenna simultaneously realizes the performance of wide frequency band, dual polarization and integrated filtering, the working frequency band can cover the frequency band of 5G millimeter wave n257/n258, and the antenna can become an alternative antenna of a 5G millimeter wave system.
The invention adopts the following technical scheme:
A5G millimeter wave dual-polarization magnetoelectric dipole filter antenna comprises a top dielectric substrate, a bottom dielectric substrate and a middle bonding layer; a radiator structure is printed on the upper surface of the top dielectric substrate, the radiator structure is connected to the lower surface of the dielectric substrate through 20 metallized through holes to form a magnetoelectric dipole structure, and the 20 metallized through holes are blind holes;
the upper surface of the top dielectric substrate is printed with a dual-polarized feed cross-shaped metal patch, the cross-shaped metal patch is connected to a feed microstrip line of the bottom dielectric substrate through 4 metalized through holes, and the 4 metalized through holes are through holes;
an annular metal patch is printed on the upper surface of the top layer dielectric substrate, the metal patch can adopt a square ring structure, and the annular metal patch surrounds the radiator structure;
the lower surface of the top dielectric substrate is printed with a metal ground, 4 circular gaps are loaded on the metal ground, and the circular gaps are used for connecting a cross-shaped feed structure on the upper surface of the top dielectric substrate to a feed microstrip line on the lower surface of the bottom dielectric substrate;
4 circular patches are printed on the upper surface of the bottom dielectric substrate and are used for being normally connected with a cross feed structure on the upper surface of the top dielectric substrate through metallized through holes.
Two groups of one-to-two feed microstrip lines are printed on the lower surface of the bottom layer dielectric substrate, each group of feed microstrip lines form a differential circuit in the respective polarization direction, and the length difference of two parts at the separation position of each group of one-to-two feed microstrip lines is about one half of the corresponding wavelength of a working frequency band and is used for forming a 180-degree phase difference required by the differential feed circuit; and a branch line is printed at the tail end of one microstrip line after each group of feed microstrip lines are branched and is used for improving the out-of-band inhibition level of the high frequency band.
The bonding layer is positioned between the two dielectric plates and is used for bonding and connecting the top dielectric substrate and the bottom dielectric substrate; the blind holes do not penetrate through the bonding layer and are used for connecting the upper surface and the lower surface of the top-layer dielectric substrate, and the through holes penetrate through the bonding layer and are used for connecting the upper surface of the top-layer dielectric substrate to the lower surface of the bottom-layer dielectric plate.
The length of an electric dipole and the height of a magnetic dipole of the magnetoelectric dipole structure can jointly control a low-frequency zero point.
The square ring patch on the upper surface of the top dielectric substrate and the differential circuit on the lower surface of the bottom dielectric substrate can jointly control a high-frequency zero point.
The 5G millimeter wave dual-polarization magnetoelectric dipole filtering antenna covers a 5G millimeter wave communication n257/n258 frequency band, and is easy to integrate the filtering characteristic and the antenna function.
The invention adopts a dual-polarization differential feed mode to effectively improve the out-of-band rejection level, and through the band-pass characteristic of the isolation parameter of the differential port, because the isolation at the high-frequency out-of-band position is about-1 dB, the energy flows away from the other port in a coupling way when one port is excited, thereby generating better out-of-band rejection effect.
Compared with the prior art, the invention has the beneficial effects that:
1) the dual-polarized magnetoelectric dipole filtering antenna has a simple structure, and only one annular patch is added at the periphery of the radiation patch, so that the size of the antenna cannot be further increased. Meanwhile, any filter network and additional other parasitic structures are not needed, and the band-pass filtering radiation effect is generated by combining the dual-polarized differential feed circuit.
2) The radiation zero point of the dual-polarized magnetoelectric dipole filtering antenna can be independently controlled: the low-frequency radiation zero point can be controlled by controlling the length of the electric dipole and the height of the magnetic dipole; the high-frequency radiation zero point can be controlled by controlling the square-ring patch and the differential feed circuit.
3) The impedance bandwidth of the dual-polarized magnetoelectric dipole filter antenna covered by the invention is 22.2% (24-30 GHz), the antenna covers the n257/n258 frequency band of 5G millimeter waves, and the antenna can become an alternative antenna applied to a 5G millimeter wave communication system.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a top plan view of a top dielectric substrate of an embodiment of the present invention;
FIG. 3 is a bottom view of a top dielectric substrate of an embodiment of the present invention;
FIG. 4 is a top view of an underlying dielectric substrate of an embodiment of the invention;
FIG. 5 is a bottom view of an underlying dielectric substrate of an embodiment of the invention;
FIG. 6 is a graph of simulation results of the variation of the S parameter of the antenna of the present invention with frequency;
FIG. 7 is a graph of simulation results of the variation of antenna gain with frequency in accordance with the present invention;
FIG. 8 is a graph of simulation results of the XOZ plane directional pattern at 28GHz frequency for the antenna of the present invention;
FIG. 9 is a graph of simulation results of the YOZ plane pattern at 28GHz frequency for the antenna of the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.
As shown in fig. 1 to 5, the 5G millimeter wave dual-polarization magnetoelectric dipole filter antenna according to the embodiment of the present invention includes a top dielectric substrate 1, a bottom dielectric substrate 3, and a middle bonding layer 2, and the top dielectric substrate and the bottom dielectric substrate are connected by the middle bonding layer 2.
The upper surface of the top dielectric substrate 1 is printed with a radiator structure 4, a square ring metal patch 6 and a cross-shaped metal patch 7, and the radiator structure 4 is connected to a metal ground 13 on the lower surface of the top dielectric substrate 1 through a metallized blind hole 5; the cross-shaped metal patch 7 is connected to the lower surface feed microstrip line of the bottom layer dielectric substrate 3 through a through hole 8.
The lower surface of the top-layer dielectric substrate is printed with a metal ground 13, 4 circular gaps 9 are loaded on the metal ground 13, circular patches 12 are loaded on the inner diameter portions of the circular gaps 9, and the circular patches 12 are used for being connected with a cross patch on the upper surface of the top-layer dielectric substrate and a feed microstrip line on the lower surface of the bottom-layer dielectric substrate.
4 metal rings 15 are printed on the upper surface of the bottom dielectric substrate and are used for being connected with the cross patch on the upper surface of the top dielectric substrate and the feed microstrip line on the lower surface of the bottom dielectric substrate.
As shown in fig. 5, two groups of one-to-two feeding microstrip lines 10 and 11 are printed on the lower surface of the bottom dielectric substrate, and the length difference between the two parts at the separation position of each group of one-to-two feeding microstrip lines is about one half of the corresponding wavelength of the working frequency band, so as to form a 180 ° phase difference required by the differential feeding circuit. The differential feed circuit utilizes the band-pass characteristic of the isolation degree between different polarized ports to realize the out-of-band gain suppression effect of the high frequency band. And a branch line 14 is printed at the tail end of one microstrip line after the bifurcation of each group of one-to-two feed microstrip lines and is used for improving the out-of-band suppression level of the high frequency band.
As shown in FIG. 6, the reflection coefficient S of the antenna of the present invention11A simulation result graph of frequency shows that the impedance matching in a passband is good, the impedance bandwidth is 24-30GHz, the return loss is below-14 dB, the isolation in a working frequency band is below-20 dB, the return loss outside a low frequency band is close to 0dB, and at the moment, the antenna does not radiate energy, so that the low-frequency filtering effect is realized; the isolation degree outside the high frequency band is close to-1 dB, at the moment, if excitation is added to one port, energy is coupled to the other port, the return loss outside the high frequency band is below-10 dB, at the moment, the antenna does not radiate energy, and the high frequency filtering effect is achieved.
As shown in fig. 7, it is a diagram of simulation results of actual gain versus frequency of the antenna of the present invention, and two controllable radiation zeros are implemented. The low-frequency out-of-band filtering suppression exceeding 30dB at 15-19GHz and the high-frequency out-of-band filtering suppression exceeding 20dB at 35-40GHz are realized.
As shown in fig. 8 and 9, the normalized directional diagrams of the XOZ plane and the YOZ plane are obtained when one port of the antenna of the present invention is excited, and due to the port symmetry, the directional diagrams of the other polarized port are substantially consistent, so that the cross polarization level is finally achieved to be below-20 dB, the main polarization is in a directional radiation mode, and the back lobe is about-20 dB.
The invention can adjust the size of the related structure according to the requirement to adapt to the receiving and transmitting equipment of the wireless communication system with different frequency bands, because the structure of the invention utilizes the isolation band-pass characteristic between two different ports of the differential feed structure and uses a square ring patch to obtain good band-pass filtering characteristic, the size of the antenna can not be increased, no other filtering circuit is added, the working bandwidth covers the n257/n258 frequency band of 5G millimeter wave communication, and the invention is suitable for the multi-antenna wireless communication scene with low loss, multiple frequency bands and multiple systems.
The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the embodiments, and any other modifications, combinations, simplifications, etc. without departing from the principle and spirit of the present invention are included in the scope of the present invention.
Claims (10)
1. A5G millimeter wave dual-polarization magnetoelectric dipole filter antenna is characterized by comprising a top dielectric substrate, a bottom dielectric substrate and a middle bonding layer;
the upper surface of the top dielectric substrate is printed with a radiator structure, a dual-polarized feed cross-shaped metal patch and an annular metal patch, and the annular metal patch surrounds the radiator structure; the radiator structure is connected to the lower surface of the top dielectric substrate to form a magnetoelectric dipole structure, and the cross-shaped metal patch is connected to a feed microstrip line of the bottom dielectric substrate;
the lower surface of the top layer medium substrate is printed with a metal ground, and 4 circular gaps are loaded on the metal ground;
4 circular patches are printed on the upper surface of the bottom layer dielectric substrate;
two groups of feed microstrip lines with one in two are printed on the lower surface of the bottom layer dielectric substrate, each group of feed microstrip lines form a differential circuit in the respective polarization direction, and the tail end of one microstrip line after each group of feed microstrip lines is forked is printed with a branch line for improving the out-of-band inhibition level of the high frequency band;
the bonding layer is positioned between the two dielectric plates and is used for bonding and connecting the top dielectric substrate and the bottom dielectric substrate.
2. The 5G millimeter wave dual-polarization magnetoelectric dipole filter antenna according to claim 1, wherein the radiator structure is connected to the lower surface of the dielectric substrate through 20 metallized through holes to form a magnetoelectric dipole, and the 20 metallized through holes are blind holes;
the dual-polarized feed cross-shaped metal patch is connected to a feed microstrip line of the bottom dielectric slab through 4 metallized through holes, and the 4 metallized through holes are through holes.
3. The 5G millimeter wave dual-polarized magnetoelectric dipole filter antenna according to claim 1, wherein the annular metal patch adopts a square ring structure.
4. The 5G millimeter wave dual-polarization magnetoelectric dipole filter antenna according to claim 1, characterized in that 4 circular slots are loaded on the metal ground, and the circular slots are used for feeding microstrip lines, wherein the dual-polarization feeding cross-shaped metal patch on the upper surface of the top dielectric substrate is connected to the feeding microstrip lines on the lower surface of the bottom dielectric substrate.
5. The 5G millimeter wave dual-polarization magnetoelectric dipole filter antenna according to claim 1, wherein the length difference of the two parts at the separation position of each group of one-by-two feed microstrip lines is one half of the corresponding wavelength of the working frequency band, and 180-degree phase difference is required for forming a differential feed circuit.
6. The 5G millimeter wave dual-polarization magnetoelectric dipole filter antenna according to claim 2, wherein the blind holes do not penetrate through the bonding layer and are used for connecting the upper surface and the lower surface of the top dielectric substrate; the through hole penetrates through the bonding layer and is used for connecting the upper surface of the top-layer dielectric substrate to the lower surface of the bottom-layer dielectric plate.
7. The 5G millimeter wave dual-polarized magnetoelectric dipole filter antenna according to claim 1, wherein the low-frequency zero point is controlled by the length of an electric dipole and the height of a magnetic dipole of the magnetoelectric dipole structure together.
8. The 5G millimeter wave dual-polarization magnetoelectric dipole filter antenna according to claim 1, characterized in that the square ring patch on the upper surface of the top dielectric substrate and the differential circuit on the lower surface of the bottom dielectric substrate can control high-frequency zero points together.
9. The 5G millimeter wave dual-polarization magnetoelectric dipole filter antenna according to claim 1, characterized in that it covers a 5G millimeter wave communication n257/n258 frequency band to utilize the integration of the filtering characteristic and the antenna function.
10. The 5G millimeter wave dual-polarization magnetoelectric dipole filter antenna according to claim 1, characterized in that the isolation degree outside the high-frequency band is-1 dB, and energy flows away from the other port in a coupling manner when the port of one of the differential circuits is excited, thereby realizing the suppression effect outside the high-frequency band.
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| CN202210238834.0A CN114566794B (en) | 2022-03-11 | 2022-03-11 | 5G millimeter wave dual-polarized magneto-electric dipole filter antenna |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114784502A (en) * | 2022-06-22 | 2022-07-22 | 成都空间矩阵科技有限公司 | Millimeter wave quadrupole electromagnetic dipole antenna |
| CN115117612A (en) * | 2022-06-10 | 2022-09-27 | 中车长春轨道客车股份有限公司 | Broadband millimeter wave magnetic electric dipole antenna based on SIW feed |
| CN115133286A (en) * | 2022-06-29 | 2022-09-30 | 东莞理工学院 | Magnetoelectric dipole antenna with linear polarization and circular polarization switching functions and communication equipment |
| CN115548661A (en) * | 2022-09-28 | 2022-12-30 | 东莞理工学院 | Broadband circularly polarized patch antenna |
| CN115882220A (en) * | 2023-02-07 | 2023-03-31 | 广东工业大学 | Broadband high-isolation magnetoelectric dipole antenna for full-duplex application and communication equipment |
| CN116247428A (en) * | 2023-05-11 | 2023-06-09 | 微网优联科技(成都)有限公司 | Millimeter wave array antenna |
| CN116387805A (en) * | 2023-06-05 | 2023-07-04 | 微网优联科技(成都)有限公司 | Dual-polarized millimeter wave antenna and antenna array |
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| CN113224515A (en) * | 2020-01-21 | 2021-08-06 | 大唐移动通信设备有限公司 | Antenna device and base station equipment |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115117612B (en) * | 2022-06-10 | 2023-05-02 | 中车长春轨道客车股份有限公司 | Broadband millimeter wave magneto-electric dipole antenna based on SIW feed |
| CN115117612A (en) * | 2022-06-10 | 2022-09-27 | 中车长春轨道客车股份有限公司 | Broadband millimeter wave magnetic electric dipole antenna based on SIW feed |
| CN114784502A (en) * | 2022-06-22 | 2022-07-22 | 成都空间矩阵科技有限公司 | Millimeter wave quadrupole electromagnetic dipole antenna |
| CN115133286A (en) * | 2022-06-29 | 2022-09-30 | 东莞理工学院 | Magnetoelectric dipole antenna with linear polarization and circular polarization switching functions and communication equipment |
| CN115133286B (en) * | 2022-06-29 | 2023-07-11 | 东莞理工学院 | Magneto-electric dipole antenna with linear polarization and circular polarization function switching function and communication equipment |
| CN115548661A (en) * | 2022-09-28 | 2022-12-30 | 东莞理工学院 | Broadband circularly polarized patch antenna |
| CN115548661B (en) * | 2022-09-28 | 2023-12-15 | 东莞理工学院 | Broadband circularly polarized patch antenna |
| CN115882220B (en) * | 2023-02-07 | 2023-06-06 | 广东工业大学 | Broadband high-isolation magneto-electric dipole antenna for full duplex application and communication equipment |
| CN115882220A (en) * | 2023-02-07 | 2023-03-31 | 广东工业大学 | Broadband high-isolation magnetoelectric dipole antenna for full-duplex application and communication equipment |
| CN116247428A (en) * | 2023-05-11 | 2023-06-09 | 微网优联科技(成都)有限公司 | Millimeter wave array antenna |
| CN116247428B (en) * | 2023-05-11 | 2023-08-08 | 微网优联科技(成都)有限公司 | Millimeter wave array antenna |
| CN116387805A (en) * | 2023-06-05 | 2023-07-04 | 微网优联科技(成都)有限公司 | Dual-polarized millimeter wave antenna and antenna array |
| CN116387805B (en) * | 2023-06-05 | 2023-08-22 | 微网优联科技(成都)有限公司 | Dual-polarized millimeter wave antenna and antenna array |
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