CN213401514U - 5G millimeter wave electromagnetic hybrid dual-polarization MIMO antenna array - Google Patents
5G millimeter wave electromagnetic hybrid dual-polarization MIMO antenna array Download PDFInfo
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- CN213401514U CN213401514U CN202021885397.4U CN202021885397U CN213401514U CN 213401514 U CN213401514 U CN 213401514U CN 202021885397 U CN202021885397 U CN 202021885397U CN 213401514 U CN213401514 U CN 213401514U
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Abstract
The utility model provides a 5G millimeter wave electromagnetism mixes double polarization MIMO antenna array comprises floor, dielectric layer, metal column, cell type net and metal rectangle net. The millimeter wave MIMO antenna array adopting the groove line and microstrip line hybrid design can adjust the impedance bandwidth through the geometric parameters of the adjusting unit, the short side of each rectangular grid is a radiating unit, the antenna gain is increased along with the increase of the number of the radiating units under a certain condition, the working frequency range of the antenna is 24.0GHz-27.5GHz and completely covers the 24.25-27.5 GHz (5G) frequency range, the antenna has great application value in a microwave integrated circuit and a communication system, a foundation is provided for the wide application of the electromagnetic hybrid grid MIMO array antenna in a microwave integrated circuit and a 5G communication system, and the antenna has the advantages of high isolation, wide impedance bandwidth, high gain, working in millimeter wave band, small volume, easy processing, high integration level and the like.
Description
Technical Field
The utility model relates to a wireless communication technology field especially relates to a 5G millimeter wave electromagnetic mixing dual polarization MIMO antenna array.
Background
Grid array antennas were first proposed by Kraus in 1964 and patented in 1966. Since then, a series of studies have been carried out on it, but these studies have been carried out only at lower frequencies. In 1996, Nakano and his assistant proposed a cellular grid antenna, and in 1998, a C-type converter was loaded on the grid antenna to achieve circular polarization. Then, the long sides of the grid are bent to obtain the miniaturized grid array antenna, and the short sides of the grid are modified to obtain the circularly polarized grid array antenna.
An article entitled "A94-GHz Dual-Polarized Microstrip Mesh Array Antenna in LTCC Technology" published by ZhiHao Chen and YuePing Zhang et al, 2016, first proposed a Microstrip grid Array Antenna for 94 GHz. The microstrip network array antenna increases the polarization diversity of the system, and can simultaneously support the receiving of two orthogonal polarizations and the transmission of any polarization. The proposed design is composed of two orthogonal grid arrays, where the matching stub is specifically designed to compensate for the change in input impedance due to direct coupling of the complementary array of the other polarization. The dual-linear polarization microstrip network array antenna is used as a single-port antenna, the maximum implementation gain measured at 93.6GHz is 13.3dBi, the 10dB impedance bandwidth is 6.91%, the 3-dB gain bandwidth is 1.70%, and the structure is shown in FIG. 1.
In 2018, Zhang Yue Ping et al published an article entitled "Mutual Coupling Between microstrip array on electric Thin Substrate," which proposed a highly isolated microstrip mesh MIMO antenna array designed on a Thin dielectric Substrate. Researches show that mutual coupling between microstrip grid arrays on a thin dielectric substrate is mainly caused by dielectric polarization current. By appropriate selection of antenna array coefficients and dimensions, high isolation between sub-grid arrays can be achieved. However, since the dielectric substrate is too thin, the operating bandwidth is narrow, and the structure is as shown in fig. 2.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide a 5G millimeter wave electromagnetic mixing dual polarization MIMO antenna array adopts the wide 24.0GHz ~ 27.5GHz of millimeter wave MIMO antenna array antenna operating frequency range of slot line and microstrip line hybrid design, covers 24.25 ~ 27.5GHz (5G) frequency channel completely, has very big using value in microwave integrated circuit and communication system.
The utility model provides a 5G millimeter wave electromagnetic hybrid dual-polarization MIMO antenna array, including microstrip net antenna array, feed point, connecting piece, first dielectric layer, cell type net antenna array, metal ground, metal post, second dielectric layer, coaxial cable, the top surface and the bottom surface of first dielectric layer are printed with the metal level, microstrip net antenna array, feed point, connecting piece are located the top surface of first dielectric layer, cell type net antenna array prints the bottom surface of first dielectric layer, first dielectric layer and second dielectric layer have seted up the metal through-hole, the metal post passes through the metal through-hole and installs on first dielectric layer and the second dielectric layer, the top surface of second dielectric layer is printed with the metal level, metal ground prints the top surface of second dielectric layer to link to each other with coaxial cable's outer conductor and be as the plane of reflection of cell type net antenna array, the metal ground is connected with the peripheral metal of the groove type grid antenna array through the metal column to be used as a reflecting surface of the micro-strip grid antenna array, a feed point of the micro-strip grid antenna array is connected with an inner conductor of the coaxial cable, an outer conductor of the coaxial cable is connected with the groove type grid antenna array, the inner conductor of the coaxial cable is connected with the connecting piece through the feed point of the groove type grid antenna array, and the connecting piece is connected with the groove type grid antenna array through the metal column.
Furthermore, the bottom surface of the first dielectric layer is provided with a circular groove, and the position of the circular groove corresponds to the feed point of the microstrip grid antenna array.
Further, the radius of the circular groove is the same as the radius of the outer conductor of the coaxial cable.
Furthermore, a connecting through hole is formed in the second medium layer, the position of the connecting through hole corresponds to the position of the circular groove, and the coaxial cable penetrates through the connecting through hole to be connected with the first medium layer and the second medium layer.
Furthermore, a metal copper ring is further arranged on the top surface of the first dielectric layer, is located on the outer ring of the metal through hole and is connected with the metal through hole.
Furthermore, a slot line is formed in the metal layer on the bottom surface of the first dielectric layer, and the slot line is located between two adjacent microstrip grid antenna arrays.
Further, the placement direction of the microstrip grid antenna array is the same as that of the groove type grid antenna array.
Furthermore, the slot type grid antenna array is positioned in the middle of the microstrip grid antenna array at a position corresponding to the bottom surface of the first medium layer.
Further, the metal post is the metal copper post, the connecting piece is the metal paster.
Further, the first dielectric layer and the second dielectric layer are rogers dielectric layers with a dielectric constant of 2.2.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the utility model provides a 5G millimeter wave electromagnetism mixes double polarization MIMO antenna array comprises floor, dielectric layer, metal column, cell type net and metal rectangle net. The millimeter wave MIMO antenna array adopting the groove line and microstrip line hybrid design can adjust the impedance bandwidth through the geometric parameters of the adjusting unit, the short side of each rectangular grid is a radiating unit, the antenna gain is increased along with the increase of the number of the radiating units under a certain condition, the working frequency range of the antenna is 24.0GHz-27.5GHz and completely covers the 24.25-27.5 GHz (5G) frequency range, the antenna has great application value in a microwave integrated circuit and a communication system, a foundation is provided for the wide application of the electromagnetic hybrid grid MIMO array antenna in a microwave integrated circuit and a 5G communication system, and the antenna has the advantages of high isolation, wide impedance bandwidth, high gain, working in millimeter wave band, small volume, easy processing, high integration level and the like.
The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings. The detailed description of the present invention is given by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:
fig. 1 is a schematic diagram of a dual-linear polarization microstrip network array antenna in the background art of the present invention;
FIG. 2 is the schematic diagram of the structure of the microstrip mesh MIMO antenna array in the background art of the present invention
Fig. 3 is a schematic structural diagram of a 5G millimeter wave electromagnetic hybrid dual-polarization MIMO antenna array of the present invention;
FIG. 4 is a schematic top view of a first dielectric layer according to the present invention;
fig. 5 is a schematic bottom view of the first dielectric layer of the present invention;
fig. 6 is a schematic view of a second dielectric layer according to the present invention;
fig. 7 is an S parameter schematic diagram of a 5G millimeter wave electromagnetic hybrid dual-polarization MIMO antenna array of the present invention;
fig. 8 is the directional diagram of a 5G millimeter wave electromagnetic hybrid dual-polarization MIMO antenna array of the present invention.
In the figure: 1. a microstrip mesh antenna array; 2. a connecting member; 3. a first dielectric layer; 31. a metal via; 32. a circular groove; 33. a slot line; 4. a slotted grid antenna array; 5. a metal post; 6. a second dielectric layer; 7. a metal ground; 8. a coaxial cable; 9. port 1 feed point; 10. port 2 feed point; 11. port 3 feed point; 12. port 5 feed point; 13. port 4 feed point; 14. a copper metal ring; 15. a rectangular metal; 16. a metal layer.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.
A5G millimeter wave electromagnetic hybrid dual-polarization MIMO antenna array is shown in figures 3, 4 and 6 and comprises a microstrip grid antenna array 1, a feed point, a connecting piece 2, a first dielectric layer 3, a slot type grid antenna array 4, a metal ground 7, a metal column 5, a second dielectric layer 6 and a coaxial cable 8, wherein metal layers 16 are printed on the top surface and the bottom surface of the first dielectric layer 3, the microstrip grid antenna array 1, the feed point and the connecting piece 2 are positioned on the top surface of the first dielectric layer 3, the slot type grid antenna array 4 is printed on the bottom surface of the first dielectric layer 3, metal through holes 31 are formed in the first dielectric layer 3 and the second dielectric layer 6, the metal column 5 is installed on the first dielectric layer 3 and the second dielectric layer 6 through the metal through holes 31, and the metal column 5 also serves as a supporting structure of. The antenna adopts a coaxial mode for feeding, a metal layer 16 is printed on the top surface of a second dielectric layer 6, a metal ground 7 is printed on the top surface of the second dielectric layer 6 and is connected with an outer conductor of a coaxial cable 8 to be used as a reflecting surface of a groove type grid antenna array 4, the metal ground 7 is connected with a peripheral metal of the groove type grid antenna array 4 through a metal column 5 to be used as a reflecting surface of a micro-strip grid antenna array 1, the micro-strip grid antenna array 1 directly feeds power through the coaxial cable 8, and specifically, a feeding point of the micro-strip grid antenna array 1 is connected with an inner conductor of the coaxial cable 8; the feed system of the slotted grid antenna array 4 is specifically as follows: the outer conductor of the coaxial cable 8 is connected with the groove type grid antenna array 4, the inner conductor of the coaxial cable 8 is connected with the connecting piece 2 through the feeding point of the groove type grid antenna array 4, and the connecting piece 2 is connected with the groove type grid antenna array 4 through the metal column 5, so that the effect of feeding the groove type grid antenna array 4 is achieved. Preferably, the metal pillar 5 is a metal copper pillar, the connecting member 2 is a metal patch, and the first dielectric layer 3 and the second dielectric layer 6 are rogers dielectric layers having a dielectric constant of 2.2.
As shown in fig. 4 and 5, the design that the number of the microstrip grid antenna arrays 1 is 4 and the number of the slot type grid antenna arrays 4 is 1 is adopted, so that the circuit is more miniaturized and has higher integration degree. A port 2 feed point 10, a port 3 feed point 11, a port 4 feed point 13 and a port 5 feed point 12 of the microstrip grid antenna array 1 are connected with an inner conductor of the coaxial cable 8; the outer conductor of the coaxial cable 8 is connected with the rectangular metal 15 of the groove type grid antenna array 4, the inner conductor of the coaxial cable 8 is connected with the metal patch through the feeding point 9 of the port 1 of the groove type grid antenna array 4, and the metal patch is connected with the rectangular metal 15 of the groove type grid antenna array 4 through the metal column 5, so that the effect of feeding the groove type grid antenna array 4 is achieved. The slotted mesh antenna array 4 is located at the middle position of the four microstrip mesh antenna arrays 1 at the position corresponding to the bottom surface of the first dielectric layer 3, and in the embodiment, the slotted mesh antenna array 4 is printed on the back surface of the first dielectric layer 3 by a metal etching technology. It should be understood that the specific number of the microstrip mesh antenna array 1 and the slot-type mesh antenna array 4 can be set according to actual requirements.
As shown in fig. 5, in order to avoid short circuit, a circular groove 32 is opened on the bottom surface of the first dielectric layer 3, the position of the circular groove 32 corresponds to the feed point of the microstrip mesh antenna array 1, and the radius of the circular groove 32 is the same as the radius of the outer conductor of the coaxial cable 8.
As shown in fig. 6, the second dielectric layer 6 is provided with a connecting through hole, the position of the connecting through hole corresponds to the position of the circular groove 32, and the coaxial cable 8 passes through the connecting through hole to be connected with the first dielectric layer 3 and the second dielectric layer 6.
In order to prevent the metal pillar 5 from contacting the metal layer 16 of the first dielectric layer 3 poorly, a copper metal ring 14 is further disposed on the top surface of the first dielectric layer 3, and the copper metal ring 14 is located outside the metal through hole 31 and connected to the metal through hole 31.
In order to increase the isolation between two adjacent microstrip grid array antennas, the metal layer 16 on the bottom surface of the first dielectric layer 3 is provided with a slot line 33, and the slot line 33 is located between two adjacent microstrip grid array antennas 1.
According to the design principle of the grid array antenna, the short sides of the microstrip grid antenna array 1 and the short sides of the groove-shaped grid antenna array 4 are both half wavelengths corresponding to the antenna working frequency, and the long sides are both one wavelength. Thus, for the microstrip mesh antenna array 1, the currents on the short sides are all superposed in the same direction, and the currents on the long sides are all cancelled out in the opposite direction. For the groove-type grid antenna array 4, the magnetic currents on the short-side grooves are superposed in the same direction, and the magnetic currents on the long-side grooves are offset in the opposite direction. Therefore, the placing directions of the microstrip grid array antenna and the slot type grid antenna array 4 are consistent, and the coupling of the current on the microstrip grid antenna array 1 and the magnetic current on the slot type grid antenna array 4 in the space is very small, so that the isolation of the MIMO system is very high.
As shown in fig. 7 and 8, due to the symmetry of the structure, the S-parameters and the directional patterns corresponding to the 4 microstrip mesh array antennas are the same. The S-parameter, i.e. the scattering parameter, is an important parameter in microwave transmission. When S12 is port 1 matched, the transmission coefficient is reversed from port 2 to port 1, i.e. isolated; s21 is the forward transmission coefficient from port 1 to port 2 when port 2 is matched; when S11 is port 2 matched, the reflection coefficient of port 1, i.e. the input return loss, and when S22 is port 1 matched, the reflection coefficient of port 2, i.e. the output return loss, and so on. If the antenna structure is symmetrical, we can refer to a reciprocal network, and S12 is S21 corresponding to the reciprocal network. Because of the structural symmetry, the S-parameters of the microstrip mesh antennas for ports 2 and 3 are the same. For a clearer description, the corresponding S parameter and direction diagram of one port are given in this embodiment. Wherein, | S22|＝|S33|＝|S44|＝|S55|、|S21|＝|S31|、|S41|＝|S51|、|S32|＝|S54|、|S42|＝|S53|、|S52|＝|S43I, so FIG. 7 gives | S11|、|S22|、|S21|、|S41|、|S32|、|S42|、|S43I can completely describe the numerical value of the S parameter of the MIMO antenna array. Can see | S11I and I S22The I is lower than-10 dB in the frequency range of 24.0GHz-27.5GHz, and the working bandwidth completely covers the communication frequency band of 24.25GHz-27.5GHz 5G millimeter waves. And | S21|、|S41|、|S32|、|S42|、|S43All the I is lower than-38 dB in the frequency range of 24.0GHz-27.5GHz, and the MIMO array has extremely high port isolation characteristic. Fig. 8 is the E-plane and H-plane patterns corresponding to port 1 and port 2 of the MIMO array at 25.5GHz, and it can be seen that the MIMO antenna array has lower side lobes.
The utility model provides a 5G millimeter wave electromagnetism mixes double polarization MIMO antenna array comprises floor, dielectric layer, metal column, cell type net and metal rectangle net. The millimeter wave MIMO antenna array adopting the groove line and microstrip line hybrid design can adjust the impedance bandwidth through the geometric parameters of the adjusting unit, the short side of each rectangular grid is a radiating unit, the antenna gain is increased along with the increase of the number of the radiating units under a certain condition, the working frequency range of the antenna is 24.0GHz-27.5GHz and completely covers the 24.25-27.5 GHz (5G) frequency range, the antenna has great application value in a microwave integrated circuit and a communication system, a foundation is provided for the wide application of the electromagnetic hybrid grid MIMO array antenna in a microwave integrated circuit and a 5G communication system, and the antenna has the advantages of high isolation, wide impedance bandwidth, high gain, working in millimeter wave band, small volume, easy processing, high integration level and the like.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way; the utility model can be smoothly implemented by the ordinary technicians in the industry according to the drawings and the above description; however, those skilled in the art should understand that changes, modifications and variations made by the above-described technology can be made without departing from the scope of the present invention, and all such changes, modifications and variations are equivalent embodiments of the present invention; meanwhile, any changes, modifications, evolutions, etc. of the above embodiments, which are equivalent to the actual techniques of the present invention, still belong to the protection scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a 5G millimeter wave electromagnetic mixing dual polarization MIMO antenna array which characterized in that: the antenna comprises a micro-strip grid antenna array, a feed point, a connecting piece, a first dielectric layer, a groove type grid antenna array, a metal ground, a metal column, a second dielectric layer and a coaxial cable, wherein metal layers are printed on the top surface and the bottom surface of the first dielectric layer, the micro-strip grid antenna array, the feed point and the connecting piece are positioned on the top surface of the first dielectric layer, the groove type grid antenna array is printed on the bottom surface of the first dielectric layer, metal through holes are formed in the first dielectric layer and the second dielectric layer, the metal column is installed on the first dielectric layer and the second dielectric layer through the metal through holes, the metal layer is printed on the top surface of the second dielectric layer, the metal ground is printed on the top surface of the second dielectric layer and connected with an outer conductor of the coaxial cable to serve as a reflecting surface of the groove type grid antenna array, and the metal ground is connected with peripheral metal of the groove type grid antenna The feed point of the microstrip grid antenna array is connected with the inner conductor of the coaxial cable, the outer conductor of the coaxial cable is connected with the groove type grid antenna array, the inner conductor of the coaxial cable is connected with the connecting piece through the feed point of the groove type grid antenna array, and the connecting piece is connected with the groove type grid antenna array through the metal column.
2. The 5G millimeter wave electromagnetic hybrid dual-polarization MIMO antenna array of claim 1, wherein: the bottom surface of the first dielectric layer is provided with a circular groove, and the position of the circular groove corresponds to the feed point of the microstrip grid antenna array.
3. The 5G millimeter wave electromagnetic hybrid dual-polarization MIMO antenna array of claim 2, wherein: the radius of the circular groove is the same as the radius of the outer conductor of the coaxial cable.
4. The 5G millimeter wave electromagnetic hybrid dual-polarization MIMO antenna array of claim 2, wherein: the second medium layer is provided with a connecting through hole, the position of the connecting through hole corresponds to the position of the circular groove, and the coaxial cable penetrates through the connecting through hole to be connected with the first medium layer and the second medium layer.
5. The 5G millimeter wave electromagnetic hybrid dual-polarization MIMO antenna array of claim 1, wherein: and the top surface of the first dielectric layer is also provided with a metal copper ring, and the metal copper ring is positioned on the outer ring of the metal through hole and is connected with the metal through hole.
6. The 5G millimeter wave electromagnetic hybrid dual-polarization MIMO antenna array of claim 1, wherein: and a groove line is arranged on the metal layer on the bottom surface of the first medium layer and is positioned between two adjacent microstrip grid antenna arrays.
7. The 5G millimeter wave electromagnetic hybrid dual-polarization MIMO antenna array of claim 1, wherein: the arrangement directions of the micro-strip grid antenna array and the groove-shaped grid antenna array are the same.
8. The 5G millimeter wave electromagnetic hybrid dual-polarization MIMO antenna array of claim 1, wherein: the groove-shaped grid antenna array is positioned in the middle of the microstrip grid antenna array and at the position corresponding to the bottom surface of the first medium layer.
9. The 5G millimeter wave electromagnetic hybrid dual-polarization MIMO antenna array of claim 1, wherein: the metal column is a metal copper column, and the connecting piece is a metal patch.
10. The 5G millimeter wave electromagnetic hybrid dual-polarization MIMO antenna array of claim 1, wherein: the first dielectric layer and the second dielectric layer are Rogers dielectric layers with a dielectric constant of 2.2.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112117535A (en) * | 2020-09-01 | 2020-12-22 | 广州智讯通信系统有限公司 | 5G millimeter wave electromagnetic hybrid dual-polarization MIMO antenna array |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112117535A (en) * | 2020-09-01 | 2020-12-22 | 广州智讯通信系统有限公司 | 5G millimeter wave electromagnetic hybrid dual-polarization MIMO antenna array |
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