CN215869784U - Vehicle-mounted multi-band multi-port MIMO antenna - Google Patents
Vehicle-mounted multi-band multi-port MIMO antenna Download PDFInfo
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- CN215869784U CN215869784U CN202122508815.9U CN202122508815U CN215869784U CN 215869784 U CN215869784 U CN 215869784U CN 202122508815 U CN202122508815 U CN 202122508815U CN 215869784 U CN215869784 U CN 215869784U
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Abstract
The utility model discloses a vehicle-mounted multi-band multi-port MIMO antenna which comprises a signal receiving and transmitting part and a plurality of terminal wires, wherein the signal transmitting part comprises a medium base layer, a radiation patch layer and a grounding metal surface. The medium base layer with the circular structure is provided with two through holes, three points formed by the two through holes and the circle center of the medium base layer are distributed at an included angle of 90 degrees, and a first feed through hole and a second feed through hole are formed in the two through holes respectively; the radiation patch layer covers one surface of the medium base layer, the edge of the radiation patch layer is provided with two feed microstrip lines, 90-degree included angles are formed between the two feed microstrip lines, the two via holes and the circle center, and both sides of each feed microstrip line are provided with notches; the grounding metal surface covers the other surface of the dielectric base layer, and two isolating rings which respectively surround the two through holes are reserved on the grounding metal surface so that the grounding metal surface is respectively insulated from the first feed through hole and the second feed through hole. The vehicle-mounted multi-band and multi-port MIMO antenna can reduce the volume and the cost of the MIMO antenna.
Description
Technical Field
The utility model relates to an antenna, in particular to a vehicle-mounted multi-band multi-port MIMO antenna.
Background
In a miniaturized micro base station system or a vehicle-mounted MIMO communication system, MIMO antennas are required.
At present, when applied to a transceiving circuit, a MIMO antenna must be externally connected with an electric bridge or a circulator to achieve the purpose of separating transceiving signals.
The other MIMO antenna can be directly and respectively connected to the transceiver circuit, but the inevitable volume of the MIMO antenna is large, and the corresponding cost is high.
Therefore, there is a need for improvements to MIMO antennas.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the technical problem to be solved by the utility model is to provide a vehicle-mounted multi-band and multi-port MIMO antenna, and the MIMO antenna is designed to have the following purposes: the effect of transmitting and receiving separation is obtained by utilizing the radiation mode respectively excited by the feed ports formed by the first feed through hole and the second feed through hole which form an included angle of 90 degrees.
In order to solve the technical problem, the utility model is realized by the following scheme: the utility model relates to a vehicle-mounted multi-band multi-port MIMO antenna, which comprises a signal transmitting and receiving part and a plurality of terminal wires which are led out from the signal transmitting and receiving part and used for transmitting different frequency bands, wherein the signal transmitting part comprises:
the medium base layer is of a circular structure and is provided with two through holes, three points formed by the two through holes and the circle center of the medium base layer are distributed at an included angle of 90 degrees, and a first feed through hole and a second feed through hole are formed in the two through holes respectively;
the radiation patch layer covers one surface of the medium base layer, the edge of the radiation patch layer is provided with two feed microstrip lines, 90-degree included angles are formed among the two feed microstrip lines, the two via holes and the circle center, and both sides of each feed microstrip line are provided with notches;
and the grounding metal surface covers the other surface of the medium base layer, and two isolating rings which respectively surround the two through holes are reserved on the grounding metal surface so that the grounding metal surface is respectively insulated from the first feed through hole and the second feed through hole.
Further, the medium base layer is an FR4 board or a microwave medium board.
Further, the radiation patch layer is a circular patch, which is concentric with the medium base layer, and the diameter of the radiation patch layer is smaller than that of the medium base layer.
Furthermore, the radiation patch layer is a microstrip resonance antenna which radiates and receives electromagnetic waves and converts the electromagnetic waves into voltage and current signals.
Furthermore, the radiation patch layer and the grounding metal surface form a resonant cavity, and both electromagnetic radiation and electromagnetic reception are in the upper space of the radiation patch layer.
Furthermore, the ratio of the areas of the freewheeling metals of the first feed via hole and the second feed via hole to the area of the ground metal surface satisfies that the freewheeling metals do not interfere with the ground metal surface signals and the freewheeling metals do not interfere with the signals of the resonant cavity.
Compared with the prior art, the utility model has the beneficial effects that: the vehicle-mounted multi-band multi-port MIMO antenna has the advantages that the radiation modes excited by the feeding ports formed by the first feeding through hole and the second feeding through hole which form an included angle of 90 degrees are respectively used, the electromagnetic wave modes excited by the two feeds are in an orthogonal relation, so that the coupling is weak, and the effect of transmitting, receiving and separating is achieved. The vehicle-mounted multi-band and multi-port MIMO antenna can reduce the volume and the cost of the MIMO antenna.
Drawings
FIG. 1 is a perspective view of the vehicle-mounted multiband and multiport MIMO antenna according to the present invention.
Fig. 2 is a schematic structural view of a radiation patch layer covering a dielectric substrate according to the present invention.
FIG. 3 is a schematic view of a dielectric substrate covered by a grounding metal layer according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and thus the protection scope of the present invention is more clearly and clearly defined. It should be apparent that the described embodiments of the present invention are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1: the concrete structure of the utility model is as follows:
referring to fig. 1-3, the vehicle-mounted multiband and multiport MIMO antenna of the present invention includes a signal transceiver 1 and a plurality of terminal wires 2 leading from the signal transceiver 1 for transmitting different frequency bands, wherein the signal transmitter 1 includes:
the medium base layer 11 with a circular structure is provided with two through holes, three points formed by the two through holes and the center of the medium base layer 11 are distributed at an included angle of 90 degrees, and a first feed through hole 13 and a second feed through hole 16 are formed on the two through holes respectively;
the radiation patch layer 12 covers one surface of the medium base layer 11, the edge of the radiation patch layer is provided with two feed microstrip lines 15, 90-degree included angles are formed among the two feed microstrip lines 15, the two via holes and the circle center, and two sides of each feed microstrip line 15 are provided with notches 14;
and the grounding metal surface 17 covers the other surface of the dielectric base layer 11, and two isolating rings 18 which respectively surround the two through holes are reserved on the grounding metal surface 17 so that the grounding metal surface 17 is respectively insulated from the first feed through hole 13 and the second feed through hole 16.
A preferred technical solution of this embodiment: the medium base layer 11 is an FR4 board or a microwave medium board.
A preferred technical solution of this embodiment: the radiation patch layer 12 is a circular patch, and is concentric with the medium base layer 11, and the diameter of the radiation patch layer 12 is smaller than that of the medium base layer 11.
A preferred technical solution of this embodiment: the radiation patch layer 12 is a microstrip resonant antenna that radiates and receives electromagnetic waves and converts them into voltage and current signals.
A preferred technical solution of this embodiment: the radiation patch layer 12 and the ground metal surface 17 form a resonant cavity, and both electromagnetic radiation and electromagnetic reception are located in the upper space of the radiation patch layer 12.
A preferred technical solution of this embodiment: the ratio of the areas of the free-wheeling metal of the first feed via hole 13 and the second feed via hole 16 to the area of the ground metal surface 17 satisfies that the free-wheeling metal does not interfere with the signal of the ground metal surface 17 and the free-wheeling metal does not interfere with the signal of the resonant cavity.
Example 2:
as shown in fig. 2-3, in the on-vehicle multiband multiport MIM0 antenna of the present invention, assuming that one direction is the X-axis direction and the other direction is the Y-axis direction, assuming that the direction of the electromagnetic wave radiated electric field excited by the first feed via 13 and the second feed via 16 feed via 13 in embodiment 1 is the X-axis direction in fig. 1 and the direction of the electromagnetic wave radiated electric field excited by the second feed via 16 is the Y-axis direction in fig. 1, since the electromagnetic wave satisfies the reciprocity theorem, transmission and reception can be exchanged, and any one of the feed ports can be connected to the receiver and the other feed port can be connected to the transmitter. If the first feed through hole 13 is connected to a transmitter, electromagnetic waves are polarized and radiated in the X-axis direction, if the electromagnetic waves encounter an object to be reflected, the Y-polarized component of cross polarization in the reflected electromagnetic waves is received through the second feed through hole 16 and enters a receiver to be processed, because the two feed points excite the electromagnetic wave mode to be orthogonal, the first feed through hole 13 and the second feed through hole 16 are naturally isolated in the antenna, the receiving feed point cannot receive a through signal of the transmitting feed point, and only can receive the cross polarization component generated by the reflection of the object.
After the two feed microstrip lines 15 extend into the radiation patch layer 12, the two orthogonally distributed feed lines respectively correspond to different polarized radiations, and the follow current metal and the metal via hole connected with the radiation patch 12 keep the two polarized field distributions from being damaged.
The dielectric substrate 11 of the present invention can also be made of low-loss microwave dielectric material, and for FR4 dielectric material as substrate, the diameter of the circular radiation patch 12 is 1.0-1.5CM, preferably 1.3 CM.
The shapes of the dielectric substrate 11 and the grounding metal surface 17 are not critical factors as long as the area of the grounding metal surface 17 is larger than or equal to that of the circular radiation patch 12, wherein the circular radiation patch 12 or the feed microstrip line 15 with a round head structure has the functions of radiating and receiving electromagnetic waves and converting the electromagnetic waves into voltage signals or current signals, two orthogonally distributed feeder lines respectively correspond to different polarized radiations, the follow current metal and the metal via hole connected with the radiation patch are necessary structures for keeping the two polarized field distributions from being damaged, the grounding metal and the patch form a resonant cavity, the follow current metal only occupies a small part of the grounding metal layer, only slightly interferes with the grounding metal layer, and the resonant cavity cannot be greatly influenced.
In summary, the vehicle-mounted multi-band and multi-port MIMO antenna of the present invention utilizes the radiation modes excited by the feeding ports formed by the first feeding via hole and the second feeding via hole forming the 90-degree included angle, and the electromagnetic wave modes excited by the two feeding are in an orthogonal relationship, so that the coupling is weak, and the effect of transmitting and receiving separation is obtained. The vehicle-mounted multi-band and multi-port MIMO antenna can reduce the volume and the cost of the MIMO antenna.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. A vehicle-mounted multi-band multi-port MIMO antenna comprises a signal transmitting and receiving part (1) and a plurality of terminal wires (2) which are led out from the signal transmitting and receiving part (1) and used for transmitting different frequency bands, and is characterized in that the signal transmitting and receiving part (1) comprises:
the medium base layer (11) with a circular structure is provided with two through holes, three points formed by the two through holes and the circle center of the medium base layer (11) are distributed at an included angle of 90 degrees, and a first feed through hole (13) and a second feed through hole (16) are respectively formed on the two through holes;
the radiation patch layer (12) covers one surface of the medium base layer (11), the edge of the radiation patch layer is provided with two feed microstrip lines (15), 90-degree included angles are formed between the two feed microstrip lines (15), the two via holes and the circle center, and two sides of each feed microstrip line (15) are provided with notches (14);
and the grounding metal surface (17) covers the other surface of the medium base layer (11), and two isolating rings (18) which respectively surround the two through holes are reserved on the grounding metal surface (17) so that the grounding metal surface (17) is respectively insulated from the first feed through hole (13) and the second feed through hole (16).
2. The MIMO antenna of multi-band and multi-port for vehicle carried with claim 1, wherein the dielectric substrate (11) is FR4 board or microwave dielectric board.
3. A multiband, multiport MIMO antenna in vehicle according to claim 1, characterized in that said radiating patch layer (12) is a circular patch which is concentric with said dielectric base layer (11) and the diameter of said radiating patch layer (12) is smaller than the diameter of said dielectric base layer (11).
4. The vehicle mounted multiband multi-port MIMO antenna according to claim 1, wherein the radiation patch layer (12) is a microstrip resonant antenna which radiates and receives electromagnetic waves and converts into voltage and current signals.
5. A multiband, multiport MIMO antenna according to claim 1, wherein said radiating patch layer (12) and said ground metal plane (17) constitute a resonant cavity and both electromagnetic radiation and electromagnetic reception are located in the upper space of said radiating patch layer (12).
6. The MIMO antenna of vehicle mounted multi-band multi-port as claimed in claim 5, wherein the ratio of the area of the free-wheeling metal of the first feeding via (13) and the second feeding via (16) to the area of the ground metal plane (17) is such that the free-wheeling metal does not interfere with the signal of the ground metal plane (17) and the free-wheeling metal does not interfere with the signal of the resonant cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122508815.9U CN215869784U (en) | 2021-10-18 | 2021-10-18 | Vehicle-mounted multi-band multi-port MIMO antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122508815.9U CN215869784U (en) | 2021-10-18 | 2021-10-18 | Vehicle-mounted multi-band multi-port MIMO antenna |
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| CN215869784U true CN215869784U (en) | 2022-02-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116979246A (en) * | 2023-09-20 | 2023-10-31 | 浪潮(山东)计算机科技有限公司 | Communication antenna and communication equipment |
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2021
- 2021-10-18 CN CN202122508815.9U patent/CN215869784U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116979246A (en) * | 2023-09-20 | 2023-10-31 | 浪潮(山东)计算机科技有限公司 | Communication antenna and communication equipment |
| CN116979246B (en) * | 2023-09-20 | 2023-12-19 | 浪潮(山东)计算机科技有限公司 | Communication antenna and communication equipment |
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