CN111129738A - Embedded broadband vertical polarization multiple-input multiple-output antenna - Google Patents
Embedded broadband vertical polarization multiple-input multiple-output antenna Download PDFInfo
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- CN111129738A CN111129738A CN202010009730.3A CN202010009730A CN111129738A CN 111129738 A CN111129738 A CN 111129738A CN 202010009730 A CN202010009730 A CN 202010009730A CN 111129738 A CN111129738 A CN 111129738A
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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
- H01Q1/12—Supports; Mounting means
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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
- 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
Abstract
The invention discloses an embedded broadband vertical polarization multiple-input multiple-output antenna. The top of the antenna multi-port gradient antenna metal structure (1) is a top disc metal structure (1a) with a concave center, the lower part of the top disc metal structure (1a) with the concave center is a gradient branch lobe metal structure (1b), and the multi-port gradient antenna metal structure (1) is positioned in a bowl-shaped metal structure (2); the crescent groove (3) is positioned at the bottom of the bowl-shaped metal structure (2); the antenna input/output port (4) is connected to the lower end of the gradient branch lobe metal structure (1 b); the circular ring-shaped dielectric plate (5) is used for fixing the metal structure (1) of the multi-port gradient antenna and the bowl-shaped metal structure (2). The structure of the invention can realize the multi-input multi-output radiation characteristic with broadband vertical polarization, has an embedded structure, and has wide application prospect in the aspect of non-protruding communication systems of various platforms such as vehicles, ships, aircrafts and the like.
Description
Technical Field
The invention belongs to the field of electronic devices of wireless communication systems, and particularly relates to an embedded broadband vertical polarization multiple-input multiple-output antenna. The embedded broadband vertical polarization multiple-input multiple-output antenna has an ultra-wide working frequency band, comprises a plurality of excitation ports, can generate a vertical polarization directional radiation pattern in a very wide frequency band when each port is excited independently, and is suitable for the fields of embedded communication systems of various platforms such as vehicles, ships, aircrafts and the like.
Background
The continuous development of wireless communication technology and the rapid evolution of high integration of electronic equipment promote the diversity of information acquisition means and information interaction, and simultaneously put forward higher requirements on the integration of communication equipment and a platform, and particularly for vehicle-mounted, ship-mounted, airborne and other applications, the external structure of the communication equipment needs to be conformal with the external structures of vehicles, ships and aircrafts, so that the non-protruding antenna and the embedded antenna with high performance are particularly important.
The existing communication antenna of the device on the platform such as a vehicle, a ship, a flying aircraft and the like is mostly a protruding device, and the protruding antenna can increase the section to occupy a large amount of space, break the original appearance of the platform, bring a series of problems in mechanical, aesthetic and waterproof aspects and the like, and in addition, the radiation performance of the antenna can be deteriorated. In the previous research, the vertically polarized broadband omnidirectional antenna and the vertically polarized broadband mimo antenna are both protruded and have a high profile, while the low-profile vertically polarized broadband omnidirectional antenna and the vertically polarized broadband mimo antenna have a narrow bandwidth. Therefore, the non-protruding antenna is proposed, and the profile of the antenna can be greatly reduced by fully utilizing a novel structure on the premise of ensuring the radiation performance of the antenna. The ultra-wide operating bandwidth not only ensures high-speed data transmission, but also covers most of the frequency band requirements to reduce the number of antennas required by the device. To achieve omnidirectional signal coverage with mimo antennas in a wide communication band, several pairs of narrow beam antennas are generally required to work simultaneously, but due to mutual coupling between antenna ports, overall performance of the antennas is often greatly reduced, resulting in that diversity gain caused by mimo cannot be efficiently utilized. Therefore, in various communication platforms, it is important to implement a vertically polarized mimo radiation characteristic in a wide communication band using a single antenna having a non-protruding structure.
Disclosure of Invention
The technical problem is as follows: the invention provides an embedded broadband vertical polarization multiple-input multiple-output antenna, aiming at solving the problems that the communication equipment required by various platforms can reduce the profile to the maximum extent so as to keep the original appearance of the platform and can generate a plurality of vertical polarization directional radiation patterns in a very wide frequency band. The antenna is composed of a multi-port gradual-change antenna metal structure, a bowl-shaped metal structure, a crescent groove, an antenna input/output port and a circular ring dielectric plate. The radius of the antenna disc is 0.65 lambda0Total height of 0.48 lambda0，λ0The profile is very low for the antenna at a free space wavelength of 3.95 GHz. The antenna can support all communication frequency bands in 1.7-6GHz frequency spectrum, and comprises a plurality of excitation ports, and when each port is excited independently, a directional radiation pattern with vertical polarization can be generated in a wide frequency band. In addition, the two ports in the plurality of excitation ports have good port isolation and lower envelope correlation coefficient between radiation fields.
The technical scheme is as follows: the invention provides an embedded broadband vertical polarization multiple-input multiple-output antenna. The structure is characterized in that a metal structure of a multi-port gradient antenna is embedded in a bowl-shaped metal structure; fixing the metal structure of the multi-port gradient antenna on a bottom metal disc in a bowl-shaped metal structure; four crescent grooves are carved at the bottom of the bowl-shaped metal; the antenna input/output port is connected with the gradual change branch lobe metal structure of the multi-port gradual change antenna metal structure through the bowl-shaped metal structure; and the metal structure of the multi-port gradient antenna and the bowl-shaped metal structure are fixed by a circular ring-shaped dielectric plate. The embedded broadband vertical polarization multiple-input multiple-output antenna has a bandwidth of 116%, can cover all communication frequency bands in a 1.7-6GHz frequency spectrum, and can generate a vertical polarization directional radiation pattern in a very wide frequency band when each port is excited independently. And the isolation between every two ports is less than-15 dB, and the envelope correlation coefficient is less than 0.1. Compared with the existing vertical polarization broadband multiple-input multiple-output antenna, the antenna has the advantages of capability of simultaneously covering a plurality of communication frequency bands, low port isolation, high efficiency, high gain, low envelope correlation coefficient, non-prominent structure and the like, and has important prospects in various communication platforms in the future.
The embedded broadband vertical polarization multiple-input multiple-output antenna comprises a metal structure of a multi-port gradual-change antenna, a bowl-shaped metal structure, a crescent groove, an antenna input/output port and a circular-ring-shaped dielectric plate; the top of the metal structure of the multi-port gradient antenna is a top disc metal structure with a sunken center, the lower part of the top disc metal structure with the sunken center is a gradient branch lobe metal structure, and the metal structure of the multi-port gradient antenna is positioned in the bowl-shaped metal structure; the crescent groove is positioned at the bottom of the bowl-shaped metal structure; the antenna input/output port is connected to the lower end of the gradual change lobe metal structure; the circular ring-shaped dielectric plate is used for fixing the metal structure of the multi-port gradient antenna and the bowl-shaped metal structure.
The disc edge of the top disc metal structure with the center depressed is aligned with the top outer edge of the gradual change branch lobe metal structure.
Four rectangular radial grooves are carved on the top circular disc metal structure with the center depressed by the multi-port gradient antenna metal structure.
The metal structure of the multi-port gradient antenna is fixed on a bottom metal disc on the bowl-shaped metal structure through a central metal cylinder.
The bowl-shaped metal structure inner wall is the arc shape, and inner wall "bowl mouth" diameter is 3.95 to 5 times wavelength, and bowl-shaped metal structure peripheral diameter need be greater than inner wall "bowl mouth" diameter.
The number of the crescent grooves etched at the bottom of the bowl-shaped metal structure needs to be equal to the number of the gradually-changed branch lobe metal structures and the number of the antenna input and output ports.
The number of the gradual change branch lobe metal structures of the multi-port gradual change antenna metal structure, the number of the crescent grooves and the number of the antenna input/output ports are four or more.
And the antenna input/output port is respectively connected with the bottom of the gradual change branch lobe metal structure of the multi-port gradual change antenna metal structure through a bowl-shaped metal structure.
The bowl-shaped metal structure may be expanded to a planar metal structure.
Wherein the top disk metal structure of the central depression has a diameter D0The edge of the top disk is loaded with radial slots with the number corresponding to the number of ports, and the length of each radial slot is LsWidth of radial slot Ws，D0Is 1.25 to 1.35 lambda0，LsIs 0.25 to 0.3 lambda0，WsThe value of (a) is 0.02-0.03 lambda0。
The diameter of the etched crescent groove is DcThe width of the crescent groove is DmThe distance between the input and output ports of the antenna and the center is DfThe diameter of the bottom metal disc is Db，DcIs 0.5 to 0.55 lambda0，DmIs 0.03 to 0.05 lambda0，DfIs 0.2 to 0.25 lambda0，DbIs 0.05 to 0.055 lambda0。
The height of the top disc metal structure with the central depression is HpThe edge of the branch flap is aligned with the edge of the top disk, and the length of the branch flap metal structure is LbThe diameter of the top disc recess is LdThe height of the top disc recess is Hd，HpThe value of (a) is 0.02-0.03 lambda0，LbIs 0.3 to 0.5 lambda0，LdIs 0.6 to 0.7 lambda0，HdIs 0.05 to 0.07 lambda0。
The length of the horizontal metal plate is LhLength of vertical metal plate LvThe height of the horizontal metal plate is HhThe height of the vertical metal plate is HvThe height of the central circular metal column is Hc，LhIs 0.5 to 0.6 lambda0，LvThe value of (a) is 0.06-0.07 lambda0，HhThe value of (a) is 0.075-0.085 lambda0，HvIs 0.28 to 0.32 lambda0，HcIs 0.35 to 0.45 lambda0。
The inner wall of the bowl-shaped metal structure is of an arc-shaped metal structure, and the diameter of a bowl opening at the top of the bowl-shaped metal structure is D1The diameter of the bottom bowl mouth is D2The diameter of the central bowl opening is D3，D1Is 3.9 to 4 lambda0，D2Is 1.45 to 1.55 lambda0，D3Is 0.95 to 1.25 lambda0。
The coaxial waveguide feeder is a 50 ohm coaxial waveguide.
Has the advantages that: compared with the prior art, the embedded broadband vertical polarization multiple-input multiple-output antenna provided by the invention has the advantages that:
(1) the working frequency band of the antenna is wide, the working frequency band is 1.65-6.25 GHz, and the antenna basically covers a plurality of communication frequency bands below 6GHz, such as GSM frequency bands, WIFI frequency bands, Bluetooth frequency bands, LTE partial frequency bands, 5G frequency bands, Internet of vehicles frequency bands and the like, so that the antenna is extremely wide in engineering practicability, greatly reduces the number of the antennas, and can be applied to various communication platforms. . Compared with the prior vertical polarization broadband antenna and the vertical polarization MIMO antenna, the antenna avoids the problem of narrow bandwidth caused by low profile influence.
(2) Compared with the conventional widely-applied protruding antenna, the work firstly provides the embedded antenna, and the non-protruding structure of the embedded antenna greatly improves the poor space utilization rate caused by the raised section due to the antenna installation.
(3) When each port is excited individually, a vertically polarized directional radiation pattern can be produced over a wide frequency band.
(4) The antenna has good port isolation, efficiency and gain and low envelope correlation coefficient in an ultra-wide working frequency band.
Drawings
FIG. 1a is a front view of a metal structure of a multi-port tapered antenna of the present invention; FIG. 1b shows a top view of a bowl-shaped metal structure; FIGS. 1c and 1d show side views of the metal structure of the multi-port tapered antenna of the present invention; FIG. 1e shows a side view of the embedded wideband vertically polarized multiple-input multiple-output antenna of the present invention;
fig. 2 shows the S-parameters of the embedded wideband vertical polarization multiple-input multiple-output antenna simulation;
fig. 3 shows far-field radiation patterns of the pitch surface xz and the azimuth surface xy of each frequency point when the embedded broadband vertical polarization multiple-input multiple-output antenna is excited by all ports in phase at the same time; wherein 3a is a directional diagram at the working frequency point of 1.7GHz, 3b is a directional diagram at the working frequency point of 3.1GHz, 3c is a directional diagram at the working frequency point of 4.5GHz, and 3d is a directional diagram at the working frequency point of 5.9 GHz;
fig. 4 shows normalized far-field radiation patterns of each frequency point in the E-plane and the H-plane when the embedded broadband vertical polarization multiple-input multiple-output antenna is excited individually at a single port; wherein 4a is a directional diagram at the working frequency point of 1.7GHz, 4b is a directional diagram at the working frequency point of 3.1GHz, 4c is a directional diagram at the working frequency point of 4.5GHz, and 4d is a directional diagram at the working frequency point of 5.9 GHz;
fig. 5 shows the efficiency of the embedded wideband vertical polarization mimo antenna at all frequency points within the operating bandwidth;
fig. 6 shows the gains of all frequency points in the working bandwidth of the embedded broadband vertical polarization mimo antenna;
fig. 7 shows the envelope correlation coefficient between two ports of the embedded wideband vertical polarization multiple-input multiple-output antenna;
fig. 8a, fig. 8b, and fig. 8c show schematic front, top, and side views of the embedded wideband vertical polarization mimo antenna at six ports, and fig. 8d shows a schematic front view of the bowl-shaped metal structure at six ports.
Fig. 9a, 9b, and 9c are schematic diagrams showing a front view, a top view, and a side view of the embedded broadband vertical polarization mimo antenna at eight ports, and fig. 9d is a schematic diagram showing a front view of a bowl-shaped metal structure at eight ports;
the figure shows that:
1-multiport gradual change antenna metal structure 2-bowl-shaped metal structure
3-crescent slot 4-antenna input/output port
5-ring-shaped medium plate
1 a-top disc metal structure with central depression 1 b-gradual change branch valve metal structure
1 c-rectangular radial slots 1 d-central metal cylinder
2 a-bottom metal disc
4 a-antenna input output port 14 a-antenna input output port 2
LsLength W of the top disc loading radial slotssWidth of top disc loading radial slots
DcDiameter D of the etched crescent groovemDistance of parallel movement of the crescent grooves
DfDistance D of antenna input/output port from centerbDiameter of the bottom metal disc
HpHeight L of the centrally recessed top disk metal structurebLength of the metallic structure of the branch lobe
LdDiameter H of the top disc recessdHeight of the top disc recess
LhLength L of horizontal metal platevLength of vertical metal plate
HhHeight H of the horizontal metal platevHeight of vertical metal plate
HcHeight of the central circular metal post
D0Top disc metal of central depressionDiameter of the structure
D1Diameter of the top bowl mouth of a "bowl" -shaped metal structure
D2Bottom bowl mouth diameter of a "bowl" shaped metal structure
D3Diameter of central bowl mouth of "bowl" -shaped metal structure
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The embedded broadband vertical polarization multiple-input multiple-output antenna comprises a metal structure 1 of a multi-port gradient antenna, a bowl-shaped metal structure 2, a crescent groove 3, an antenna input/output port 4 and a circular ring-shaped dielectric plate 5. The multiport gradient antenna metal structure 1 is embedded in the bowl-shaped metal structure 2, the upper part of the multiport gradient antenna metal structure is a top disc metal structure 1a with a sunken center, and the lower part of the multiport gradient antenna metal structure is a gradient branch lobe metal structure 1 b; four rectangular radial grooves 1c are carved on the top disk metal structure; the metal structure 1 of the multi-port gradient antenna passes through a central metal cylinder 1d and is fixed on a bottom metal disc 2a of the bowl-shaped metal structure; crescent grooves 3 with the same number as the ports are etched on the bowl-shaped metal structure 2. The inner conductors of the antenna input and output ports 4 are respectively connected with the gradual change branch lobe metal structures 1b of the multi-port gradual change antenna metal structure 1 through the bowl-shaped metal structure 2, and the outer conductors are respectively connected with the bowl-shaped metal structure 2. The circular ring-shaped dielectric plate 5 is used for stabilizing the relative positions of the metal structure 1 of the multi-port gradual-change antenna and the bowl-shaped metal structure 2.
Diameter D of the center-recessed top disk metal structure of the multi-port tapered antenna metal structure 1 in the design0Diameter of the top disc recess LdAnd a height HdAnd top disk loading radial slots (L)s,Ws) The lowest resonant frequency of the antenna is determined, the top disk loading radial slots and the central depressions are used for changing the current distribution on the top disk metal structure, the resonant frequency is adjusted by controlling the length of a current path, and the miniaturization of the antenna is realized. In order to generate broadband radiation characteristics, the antenna utilizes traveling wave radiation inherent to the gradual change metal structure, and the impedance of the antenna is optimized by controlling the radian of the gradual change structureAnti-matching and they are aligned with the top disk metal structure edge of the central depression, respectively. The number of the gradual change metal structures is not limited and is corresponding to the number of the required ports. The central metal cylinder is used for connecting the top disc metal structure with the bottom metal disc with the central recess, so that the effect of supporting is achieved on one hand, and the induction of an inductor is equivalent to the connection between the central metal cylinder and the floor on the other hand. The different thickness gauges of the central metal cylinder represent different sizes of inductances and the height of the central metal cylinder, which corresponds to a half-wavelength resonant structure, will also affect the impedance matching of the antenna. When all ports are excited simultaneously, the antenna radiates outwards along the direction of the azimuth plane to form an omnidirectional radiation characteristic.
For mimo antennas, the port cross-coupling between channels needs to be as low as possible, which is generally required to be lower than-15 dB, and the corresponding patterns of different ports also need to have higher orthogonality, which can be expressed by envelope correlation coefficients. Regarding isolation, considering that the ports are grounded in common, crosstalk between coplanar currents on the metal ground is a major factor affecting mutual coupling between the channels. For the improvement of the isolation, a slotted structure is mainly adopted on the peripheral metal ground to reduce the coupling of fields and the mutual interference of currents. Crescent grooves with the number corresponding to that of the ports are respectively etched on the bottom metal ground, and a circle of annular groove is etched around the bottom metal disc, so that the ground and the gradient antenna have no direct current flow and only depend on the coupling action, therefore, the ports of the antenna are kept high in isolation in a broadband, and meanwhile, the coupling between radiation electric fields is greatly reduced. Because the inner conductor of the antenna input/output port is connected with the gradually-changed branch lobe metal structure of the multi-port gradually-changed antenna metal structure through the bowl-shaped metal structure, and the bottom of the branch lobe metal structure is bent to be difficult to connect with the antenna input/output port, a section of parallel metal plate needs to be extended to be connected with the inner conductor of the antenna input/output port. In addition, a layer of circular ring dielectric plate is adopted at the top of the antenna, so that a metal structure of the multi-port gradient antenna and a bowl-shaped metal structure can be fixed, and due to the refraction phenomenon, the thickness of the circular ring dielectric plate can influence a directional diagram when a single port is excited to a certain extent.
The disk edge of the top disk metal structure with the center depression of the multi-port gradient antenna metal structure is aligned with the top outer edge of the gradient branch lobe metal structure. The bowl-shaped metal structure inner wall is the arc shape, and inner wall "bowl mouth" diameter is 3.95 to 5 times wavelength, and bowl-shaped metal structure peripheral diameter need be greater than inner wall "bowl mouth" diameter. The number of the crescent grooves etched at the bottom of the bowl-shaped metal structure needs to be equal to the number of the gradually-changed branch lobe metal structures and the number of the antenna input and output ports. The number of the gradual change branch lobe metal structures of the multi-port gradual change antenna metal structure, the number of the crescent grooves and the number of the antenna input/output ports are four or more.
FIG. 1a is a front view of a metal structure of a multi-port tapered antenna of the present invention; FIG. 1b shows a top view of a bowl-shaped metal structure; FIGS. 1c and 1d show side views of the metal structure of the multi-port tapered antenna of the present invention; FIG. 1e shows a side view of the embedded wideband vertically polarized multiple-input multiple-output antenna of the present invention; the radius of the antenna disc is 0.65 lambda0Total height of 0.48 lambda0，λ0Is the free space wavelength of the antenna at the working frequency point of 3.95 GHz.
Fig. 2 shows the S-parameters of the embedded wideband vertical polarization multiple-input multiple-output antenna simulation; it can be derived from the results that the-10 dB impedance bandwidth of this antenna is 1.65-6.25 GHz (-116%), and each port within the band is isolated more than 15dB two by two.
Fig. 3 shows normalized far-field radiation patterns of each frequency point on a pitch plane xz plane and an azimuth plane xy plane when all ports of the embedded broadband vertical polarization multiple-input multiple-output antenna are simultaneously excited in phase; wherein 3a is a directional diagram at the working frequency point of 1.7GHz, 3b is a directional diagram at the working frequency point of 3.1GHz, 3c is a directional diagram at the working frequency point of 4.5GHz, and 3d is a directional diagram at the working frequency point of 5.9 GHz; the result shows that the antenna directional diagram on the xy plane is an omnidirectional directional diagram, and the conical directional diagram on the xz plane is a conical directional diagram, which proves that the characteristic of vertical polarization can be realized in the full working frequency band when all ports are excited simultaneously.
Fig. 4 shows normalized far-field radiation patterns of each frequency point in the E-plane and the H-plane when the embedded broadband vertical polarization multiple-input multiple-output antenna is excited individually at a single port; wherein 4a is a directional diagram at the working frequency point of 1.7GHz, 4b is a directional diagram at the working frequency point of 3.1GHz, 4c is a directional diagram at the working frequency point of 4.5GHz, and 4d is a directional diagram at the working frequency point of 5.9 GHz; it follows from the results that the antenna pattern is a directional pattern in the range of 30 ° to 90 ° in the E-plane, resulting in a low frequency pattern slightly towards the normal radiation direction due to the antenna edge being close to half a wavelength from the bowl-shaped metal structure at 1.7 GHz.
Fig. 5 shows the efficiency of the embedded wideband vertical polarization mimo antenna at all frequency points; it can be seen from the figure that the efficiency of the antenna is as high as 80% in the operating band.
Fig. 6 shows the gain of the embedded wideband vertical polarization mimo antenna at all frequency points; it can be seen from the figure that the gain of the antennas in-band is up to 7 dB.
Fig. 7 shows the envelope correlation coefficient between two ports of the embedded wideband vertical polarization multiple-input multiple-output antenna; as can be seen from the figure, the envelope correlation coefficient calculated by the simulated three-dimensional directional diagram is lower than 0.1 in the working frequency band, and the result proves that the correlation coefficient between radiation fields when different ports in the working frequency band are excited is lower, and the requirement of the MIMO antenna for channel independence is met.
Fig. 8a, fig. 8b, and fig. 8c show schematic diagrams of a front view, a top view, and a side view of the embedded wideband vertical polarization multiple-input multiple-output antenna at 6 ports, and fig. 8d shows a schematic diagram of a front view of a bowl-shaped metal structure at 6 ports.
Fig. 9a, 9b, and 9c show schematic diagrams of a front view, a top view, and a side view of the embedded wideband vertical polarization multiple-input multiple-output antenna at 8 ports, and fig. 9d shows a schematic diagram of a front view of a bowl-shaped metal structure at 8 ports.
In summary, the present invention provides an embedded wideband vertical polarization mimo antenna, which has a non-protruding structure and can implement a vertical polarization directional pattern characteristic in the entire wideband range. And when each port is excited individually, a vertically polarized directional radiation pattern can be produced over a wide frequency band. The antenna can work in an embedded environment, has wide frequency band, has the advantages of vertical polarization characteristic in the band, high radiation efficiency, low envelope correlation coefficient and the like, and has important application prospect in the fields of non-prominent communication platforms, embedded multi-input multi-output communication systems, fifth-generation mobile communication and the like.
The foregoing is only a preferred embodiment of the present invention. It should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (9)
1. An embedded broadband vertical polarization multiple-input multiple-output antenna is characterized by comprising a multi-port gradually-changed antenna metal structure (1), a bowl-shaped metal structure (2), a crescent groove (3), an antenna input/output port (4) and a circular-ring-shaped dielectric plate (5); the top of the multi-port gradient antenna metal structure (1) is a top disc metal structure (1a) with a sunken center, the lower part of the top disc metal structure (1a) with the sunken center is a gradient branch lobe metal structure (1b), and the multi-port gradient antenna metal structure (1) is positioned in a bowl-shaped metal structure (2); the crescent groove (3) is positioned at the bottom of the bowl-shaped metal structure (2); the antenna input/output port (4) is connected to the lower end of the gradient branch lobe metal structure (1 b); the circular ring-shaped dielectric plate (5) is used for fixing the metal structure (1) of the multi-port gradient antenna and the bowl-shaped metal structure (2).
2. The embedded broadband vertically polarized multiple-input multiple-output antenna according to claim 1, wherein the disk edge of the top disk metal structure (1a) depressed in the center of the multi-port tapered antenna metal structure (1) is aligned with the top outer edge of the tapered lobe metal structure (1 b).
3. The embedded broadband vertical polarization multiple-input multiple-output antenna according to claim 1, wherein four rectangular radial slots (1c) are engraved on the top circular disc metal structure (1a) depressed at the center of the multi-port tapered antenna metal structure (1).
4. The embedded broadband vertically polarized multiple-input multiple-output antenna according to claim 1, characterized in that the multiport tapered antenna metal structure (1) is fixed to a bottom metal disc (2a) on the bowl-shaped metal structure (2) by a central metal cylinder (1 d).
5. The embedded broadband vertical polarization multiple-input multiple-output antenna according to claim 1, wherein the inner wall of the bowl-shaped metal structure (2) is arc-shaped, the diameter of the bowl-shaped opening of the inner wall is 3.95 to 5 times of the wavelength, and the diameter of the outer periphery of the bowl-shaped metal structure needs to be larger than the diameter of the bowl-shaped opening of the inner wall.
6. The embedded broadband vertical polarization multiple-input multiple-output antenna according to claim 1, wherein the number of the crescent grooves (3) etched on the bottom of the bowl-shaped metal structure (2) is equal to the number of the gradually-changed branch lobe metal structures (1b) and the number of the antenna input/output ports (4).
7. The embedded broadband vertical polarization multiple-input multiple-output antenna according to claim 6, wherein the number of the gradual transition branch metal structures (1b) of the multi-port gradual transition antenna metal structure (1), the number of the crescent-shaped grooves (3) and the number of the antenna input/output ports (4) are four or more.
8. The embedded broadband vertical polarization multiple-input multiple-output antenna according to claim 1, wherein the antenna input/output ports (4) are respectively connected to the bottom of the tapered lobe metal structure (1b) of the multi-port tapered antenna metal structure (1) through the bowl-shaped metal structure (2).
9. Embedded broadband vertically polarized multiple-input multiple-output antenna according to claim 1, characterized in that the bowl-shaped metal structure (2) is expandable to a planar metal structure.
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| CN202010009730.3A CN111129738A (en) | 2020-01-06 | 2020-01-06 | Embedded broadband vertical polarization multiple-input multiple-output antenna |
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| CN202010009730.3A CN111129738A (en) | 2020-01-06 | 2020-01-06 | Embedded broadband vertical polarization multiple-input multiple-output antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114583458A (en) * | 2022-05-06 | 2022-06-03 | 南京容测检测技术有限公司 | Small reverberation chamber excitation antenna |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114583458A (en) * | 2022-05-06 | 2022-06-03 | 南京容测检测技术有限公司 | Small reverberation chamber excitation antenna |
| CN114583458B (en) * | 2022-05-06 | 2022-07-15 | 南京容测检测技术有限公司 | Small reverberation chamber excitation antenna |
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