CN114566794B - 5G millimeter wave dual-polarized magneto-electric dipole filter antenna - Google Patents
5G millimeter wave dual-polarized magneto-electric dipole filter antenna Download PDFInfo
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- CN114566794B CN114566794B CN202210238834.0A CN202210238834A CN114566794B CN 114566794 B CN114566794 B CN 114566794B CN 202210238834 A CN202210238834 A CN 202210238834A CN 114566794 B CN114566794 B CN 114566794B
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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
Abstract
A5G millimeter wave dual-polarized magneto-electric dipole filter antenna relates to radio frequency communication. The device comprises 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 cross metal patch and an annular metal structure, the radiator structure is connected to the lower surface of the top dielectric substrate, the cross metal patch is connected to the feed microstrip line of the bottom dielectric plate, and the annular metal structure surrounds the radiator structure; the lower surface of the top layer medium substrate is printed with a metal ground, a circular gap is loaded on the metal ground, the upper surface of the bottom layer medium substrate is printed with a circular ring patch, the lower surface of the bottom layer medium substrate 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 the zero point of low-frequency radiation; the annular metal structure and the differential circuit control the high frequency radiation zero. Simple structure effectively promotes out-of-band suppression level, and high-frequency band out-of-band suppression effect is good. No additional filter circuit is introduced to achieve good bandpass filtering.
Description
Technical Field
The invention relates to the field of radio frequency communication, in particular to a 5G millimeter wave dual-polarized magnetic dipole filter antenna with higher roll-off filter characteristics.
Background
The 5G millimeter wave technology is an important technology in 5G application, and can meet the demands of future wireless communication on aspects of system capacity, transmission rate, differential application and the like due to the unique advantages of large bandwidth, low air interface time delay, flexible and elastic air interface configuration and the like.
Compared with patch antennas and waveguide slot antennas, the magneto-electric dipole antenna has the advantages of large bandwidth, low cross polarization, small back lobe and the like, so that the magneto-electric dipole antenna is widely applied to wireless communication systems; the three feeding modes are L-shaped metal strip feeding, microstrip slot coupling feeding and differential port feeding. However, when the dual-polarized 5G millimeter wave is applied, the design of the three feeding modes has certain difficulty, firstly, the dual-polarized feeder is not required to use a multi-layer dielectric plate, secondly, the dual-polarized feeder is required to use a jumper wire for crossing, thirdly, the millimeter wave antenna is reduced in size, and the inner conductor of the SMA connector cannot be directly connected and welded, so that how to design a good feeding system becomes the focus of researchers.
In recent years, a filter antenna has been attracting attention because of its advantages such as high efficiency, small insertion loss, and the like; the design method is roughly divided into two types, the first type is that an antenna and a filter are cascaded, and the filter is large in size and is not beneficial to being applied to a millimeter wave system; the second type adds extra parasitic structure to generate filtering performance, and the design difficulty is high. Therefore, whether or not the filter performance can be achieved by the characteristics of the antenna itself without using an additional filter circuit is an important point of research by researchers.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the antenna technology, and provides a 5G millimeter wave dual-polarized magneto-electric dipole filter antenna which utilizes port isolation band-pass characteristics of a differential circuit and a square ring structure, so that the filter characteristics of higher roll-off are realized, additional insertion loss and redundant structures are not introduced, and meanwhile, the structure of the antenna is simpler. The antenna can realize the wide frequency band, dual polarization and integrated filtering performance, and the working frequency band can cover the frequency band of n257/n258 of the 5G millimeter wave and can become an alternative antenna of a 5G millimeter wave system.
The invention adopts the following technical scheme:
A5G millimeter wave dual-polarized magneto-electric dipole filter antenna comprises a top dielectric substrate, a bottom dielectric substrate and a middle adhesive layer; the upper surface of the top dielectric substrate is printed with a radiator structure, the radiator structure is connected to the lower surface of the dielectric substrate through 20 metallized through holes to form a magneto-electric dipole structure, and the 20 metallized through holes are blind holes;
the upper surface of the top dielectric substrate is printed with dual-polarized feed cross-shaped metal patches, the cross-shaped metal patches are connected to the feed microstrip line of the bottom dielectric plate through 4 metallized through holes, and the 4 metallized through holes are through holes;
an annular metal patch is printed on the upper surface of the top dielectric substrate, the metal patch can be of a square ring structure, and the annular metal patch surrounds the radiator structure;
the lower surface of the top layer medium substrate is printed with a metal ground, 4 circular gaps are loaded on the metal ground, and a cross-shaped feed structure of the circular gaps for the upper surface of the top layer medium substrate is connected to a feed microstrip line of the lower surface of the bottom layer medium substrate;
4 circular ring 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 metallization via holes.
The lower surface of the bottom dielectric substrate is printed with two groups of one-to-two feed microstrip lines, each group of feed microstrip lines forms a differential circuit in respective polarization directions, and the length difference of the 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 the working frequency band and is used for forming a 180-degree phase difference required by the differential feed circuit; and printing a branch line at the tail end of one branched microstrip line of each group of feed microstrip lines for improving the out-of-band suppression level.
The bonding layer is positioned between the two layers of dielectric plates and is used for bonding and connecting the top dielectric substrate and the bottom dielectric substrate; the blind holes are used for connecting the upper surface and the lower surface of the top dielectric substrate, and the through holes are used for connecting the upper surface of the top dielectric substrate to the lower surface of the bottom dielectric plate.
The electric dipole length and the magnetic dipole height of the magnetic electric dipole structure can jointly control the low-frequency zero point.
The square annular 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-polarized magnetic dipole filter antenna covers the frequency range of n257/n258 of 5G millimeter wave communication, and is easy to integrate the filter characteristic and the antenna function.
The dual-polarized differential feed mode is adopted, the out-of-band suppression level can be effectively improved, and the isolation degree at the outer part of a high-frequency band is about-1 dB through the bandpass characteristic of the isolation degree parameter of the differential port, so that energy is coupled and flows away from the other port when one port is excited, and a better high-frequency band out-of-band suppression effect is generated.
Compared with the prior art, the invention has the beneficial effects that:
1) The dual-polarized magneto-electric dipole filter antenna has a simple structure, and the size of the antenna is not further increased by only adding an annular patch at the periphery of the radiation patch. Meanwhile, no filter network and additional other parasitic structures are 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 magneto-electric dipole filter antenna can be independently controlled: by controlling the length of the electric dipole and the height of the magnetic dipole, the zero point of low-frequency radiation can be controlled; the high frequency radiation zero point can be controlled by controlling the square loop patch and the differential feed circuit.
3) The dual-polarized magneto-electric dipole filter antenna provided by the invention has the impedance bandwidth of 22.2% (24-30 GHz) and the 5G millimeter wave n257/n258 frequency band, and can be an alternative antenna applied to a 5G millimeter wave communication system.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a top view of a top dielectric substrate according to an embodiment of the present invention;
FIG. 3 is a bottom view of a top dielectric substrate according to an embodiment of the present invention;
FIG. 4 is a top view of an underlying dielectric substrate according to an embodiment of the present invention;
FIG. 5 is a bottom view of an underlying dielectric substrate according to an embodiment of the present invention;
FIG. 6 is a graph of simulation results of the variation of S-parameters with frequency for the antenna of the present invention;
FIG. 7 is a graph of simulation results of the variation of the antenna gain with frequency according to the present invention;
FIG. 8 is a graph of simulation results of a planar pattern of the antenna of the present invention at a frequency XOZ of 28 GHz;
fig. 9 is a graph of simulation results of a planar pattern of the inventive antenna at a frequency YOZ of 28 GHz.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but embodiments of the present invention are not limited thereto.
As shown in fig. 1 to 5, the 5G millimeter wave dual-polarized magneto-electric dipole filter antenna according to the embodiment of the present invention includes a top dielectric substrate 1, a bottom dielectric substrate 3, and an intermediate adhesive layer 2, where the top dielectric substrate and the bottom dielectric substrate are connected by the intermediate adhesive layer 2.
The upper surface of the top dielectric substrate 1 is printed with a radiator structure 4, a square annular 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 metalized blind hole 5; the cross-shaped metal patch 7 is connected to the lower surface feed microstrip line of the underlying dielectric substrate 3 through a via 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 ring patches 12 are loaded on the inner diameter parts of the circular gaps 9, and the circular ring 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-degree phase difference required by the differential feeding circuit. The differential feed circuit realizes the high-frequency out-of-band gain suppression effect by utilizing the band-pass characteristic of the isolation degree between different polarized ports. And a branch line 14 is printed at the tail end of one branched microstrip line of each group of the one-to-two feed microstrip lines, so as to improve the out-of-band rejection level.
As shown in FIG. 6, the reflection coefficient S of the antenna of the present invention 11 The simulation result diagram of the frequency shows that the impedance matching in the passband is good, the impedance bandwidth is 24-30GHz, the return loss is below-14 dB, the isolation in the working frequency band is below-20 dB, the return loss outside the low frequency band is close to 0dB, and the antenna does not radiate energy at the moment, so that the low-frequency filtering effect is realized; outside of high frequency bandWhen the isolation degree is close to-1 dB, if the isolation degree is excited to one port, energy is coupled to the other port, the return loss outside the high-frequency band is below-10 dB, and the antenna does not radiate energy, so that the high-frequency filtering effect is realized.
As shown in fig. 7, which is a simulation result diagram of actual gain-frequency of the antenna of the present invention, two controllable radiation zeros are implemented. Low-band out-of-band filter rejection exceeding 30dB at 15-19GHz and high-band out-of-band filter rejection exceeding 20dB at 35-40GHz are achieved.
As shown in fig. 8 and 9, the normalized directional diagrams of the XOZ plane and the YOZ plane of the antenna of the present invention when one port is excited, the directional diagram of the other polarized port is basically consistent due to the port symmetry, the cross polarization level is finally realized to be below-20 dB, the main polarization is in a directional radiation mode, and the back lobe is about-20 dB.
In the receiving and transmitting equipment of the wireless communication system which can adjust the size of the related structure according to the requirement and adapt to different frequency bands, the structure of the invention utilizes the isolation bandpass characteristic between two different ports of the differential feed structure and uses a square ring patch to obtain good bandpass filter characteristic, the size of an antenna is not increased, no other filter 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 modes.
The foregoing examples are illustrative of the present invention and are not intended to be limiting, and any other modifications, combinations and simplifications, which do not depart from the spirit and principles of the invention, are intended to be included within the scope of the invention.
Claims (3)
1. The 5G millimeter wave dual-polarized magneto-electric 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 layer dielectric substrate to form a magnetic electric dipole structure, the dual-polarized feed cross-shaped metal patch is connected to a feed microstrip line on the lower surface of the bottom layer dielectric substrate through 4 metallized through holes, the 4 metallized through holes are through holes, and the through holes penetrate through the adhesive layer and are used for connecting the upper surface of the top layer dielectric substrate to the lower surface of the bottom layer dielectric substrate; the upper surface of the bottom dielectric substrate is printed with 4 metal rings, the 4 metal rings are connected with the 4 metal rings and the through holes, and the dual-polarized feed cross-shaped metal patch used for the upper surface of the top dielectric substrate is connected to the feed microstrip line of the lower surface of the bottom dielectric substrate; two groups of one-to-two feed microstrip lines are printed on the lower surface of the bottom dielectric substrate, each group of feed microstrip lines forms a differential circuit in the respective polarization direction, and a branch line is printed at the tail end of one microstrip line after the feed microstrip lines are branched and used for improving the out-of-band rejection level; the bonding layer is positioned between the two layers of dielectric substrates and is used for bonding and connecting the top layer of dielectric substrate and the bottom layer of dielectric substrate; the annular metal patch adopts a square ring structure;
the length difference of the two parts after the separation of each group of the one-to-two feed microstrip lines is one half of the corresponding wavelength of the working frequency band, and the two parts are used for forming the 180-degree phase difference required by the differential feed circuit; the isolation degree outside the high frequency band is-1 dB, and energy flows away from the coupling of the other port when the port of one differential feed circuit is excited, so that the high frequency band outside inhibition effect is realized;
the length of the electric dipole and the height of the magnetic dipole of the magnetic electric dipole structure jointly control the zero point of low-frequency radiation; the square annular patch on the upper surface of the top dielectric substrate and the differential circuit on the lower surface of the bottom dielectric substrate jointly control a high-frequency radiation zero point.
2. The 5G millimeter wave dual-polarized magnetic dipole filter antenna is characterized in that the radiator structure is connected to the lower surface of the top dielectric substrate through 20 metallized through holes to form a magnetic dipole, and the 20 metallized through holes are blind holes; the blind holes are used for connecting the upper surface and the lower surface of the top dielectric substrate without penetrating through the adhesive layer.
3. A 5G millimeter wave dual polarized magneto-electric dipole filter antenna according to claim 1, characterized in that it covers the 5G millimeter wave communication n257/n258 frequency band to utilize the integration of the filter characteristics and antenna functions.
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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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Families Citing this family (7)
| 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 |
| CN114784502B (en) * | 2022-06-22 | 2022-09-02 | 成都空间矩阵科技有限公司 | Millimeter wave quadrupole electromagnetic dipole antenna |
| 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 |
| 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 |
| CN116247428B (en) * | 2023-05-11 | 2023-08-08 | 微网优联科技(成都)有限公司 | Millimeter wave array antenna |
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109950691A (en) * | 2018-12-28 | 2019-06-28 | 瑞声科技(新加坡)有限公司 | Millimeter wave array antenna and mobile terminal |
| CN110474155B (en) * | 2019-08-19 | 2024-02-13 | 华南理工大学 | Millimeter wave filter antenna and wireless communication equipment |
| CN113224515B (en) * | 2020-01-21 | 2022-07-29 | 大唐移动通信设备有限公司 | Antenna device and base station equipment |
| CN111180886A (en) * | 2020-03-03 | 2020-05-19 | 南京锐码毫米波太赫兹技术研究院有限公司 | Miniaturized broadband dual-polarization magnetoelectric dipole millimeter wave edge-emitting antenna and array thereof |
| CN113937482A (en) * | 2020-06-29 | 2022-01-14 | 南京锐码毫米波太赫兹技术研究院有限公司 | Antenna and mobile terminal |
| CN113258991B (en) * | 2021-04-13 | 2023-02-14 | 西北大学 | Scattering communication system, microstrip antenna, array and communication distance improving method |
| CN113497356B (en) * | 2021-07-13 | 2022-10-25 | 西安电子科技大学 | Dual-band dual-polarization filtering antenna |
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