CN220382312U - Multi-frequency MIMO combined antenna with high gain - Google Patents
Multi-frequency MIMO combined antenna with high gain Download PDFInfo
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- CN220382312U CN220382312U CN202320986798.6U CN202320986798U CN220382312U CN 220382312 U CN220382312 U CN 220382312U CN 202320986798 U CN202320986798 U CN 202320986798U CN 220382312 U CN220382312 U CN 220382312U
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- 238000005859 coupling reaction Methods 0.000 claims description 91
- 230000005855 radiation Effects 0.000 claims description 34
- 230000005540 biological transmission Effects 0.000 claims description 22
- 239000000758 substrate Substances 0.000 claims description 19
- 238000005452 bending Methods 0.000 claims description 17
- 238000002955 isolation Methods 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 3
- 238000010295 mobile communication Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
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- 238000009499 grossing Methods 0.000 description 1
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Abstract
The utility model discloses a multi-frequency MIMO combined antenna with high gain, which comprises a circular reflection floor, two wifi antenna units, a first 5G/4G antenna unit and a second 5G/4G antenna unit, wherein the requirements of the traditional 2G/3G/LTE/5G frequency bands are met through the first 5G/4G antenna unit and the second 5G/4G antenna unit, the requirements of the 2.4GHz wifi frequency bands are met through the two wifi antenna units, a plurality of frequency bands are realized by adopting fewer antenna units, the two wifi antenna units are symmetrically arranged, and the first 5G/4G antenna unit and the second 5G/4G antenna unit are mutually perpendicular, so that the miniaturization design of the antenna overall structure is realized while the high isolation degree is ensured.
Description
Technical Field
The utility model relates to the technical field of antennas, in particular to a multi-frequency MIMO combined antenna with high gain.
Background
With the rapid development of modern mobile communication, the frequency bands required by mobile communication devices are wider and wider, and the required frequency bands include CDMA, GSM900, WIFI, LTE and 5G frequency bands, and the like. In practical applications, in order to realize mobile communication with full coverage, multiple antenna units are often required to be arranged in one MIMO combined antenna apparatus to realize multi-band operation, and then multiple ports of the MIMO combined antenna apparatus are required to operate, which may cause interference in different frequency bands at the same time, and cause performance degradation. In order to solve the above problems and save costs, it is necessary to implement a plurality of frequency bands with as few antenna elements as possible in one MIMO combined antenna apparatus, reduce interference of different frequencies, and each antenna element needs to have a directional high gain characteristic.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model aims to provide a multi-band MIMO combined antenna which can cover 0.6-0.96GHz, 1.7-2.7GHz and 3.3-4.2GHz multi-band and is applied to 2G/3G/LTE/WIFI/5G combined antennas, and has the characteristics of miniaturization, multi-frequency point, high gain and the like.
In order to achieve the above purpose, the scheme provided by the utility model is that the multi-frequency MIMO combined antenna with high gain comprises a circular reflection floor, two wifi antenna units, a first 5G/4G antenna unit and a second 5G/4G antenna unit, wherein the two wifi antenna units, the first 5G/4G antenna unit and the second 5G/4G antenna unit are vertically arranged on the circular reflection floor; the first 5G/4G antenna units are arranged at the middle position of the round reflecting floor in a manner of extending transversely, wherein the two wifi antenna units are symmetrically arranged at two sides of the first 5G/4G antenna units in the longitudinal direction; the second 5G/4G antenna unit is arranged at one side of the first 5G/4G antenna unit in the transverse direction, and the first 5G/4G antenna unit and the second 5G/4G antenna unit are perpendicular to each other.
Further, the first 5G/4G antenna unit and the second 5G/4G antenna unit both comprise a second substrate, a grounding wire arranged on the back surface of the second substrate, and a second bending transmission line, a radiation patch and a symmetrical coupling patch group arranged on the front surface of the second substrate; the radiation patch is of a partial surrounding structure, and the symmetrical coupling patch group is positioned above the opening of the radiation patch; the second bending transmission line is electrically connected to the bottom of the radiation patch, and is electrically connected to the circular reflective floor to be grounded.
Further, the grounding wire is of a closed graph structure, and the bottom of the grounding wire is electrically connected with the circular reflecting floor.
Further, a gap is preset in the grounding wire, and projections of the symmetrical coupling patch group and the radiation patch in the horizontal direction are overlapped in the gap.
Further, the symmetric coupling patch group comprises two rectangular patches which are symmetric to each other with the center line of the second substrate.
Further, the radiation patch adopts a C-shaped partial surrounding structure.
Further, each wifi antenna unit comprises a first substrate, and a top coupling patch, a first bending transmission line, a middle coupling patch and a bottom coupling patch which are vertically and sequentially arranged on the first substrate, wherein the first bending transmission line is electrically connected with the top coupling patch; the middle coupling patch comprises a first coupling part and a second coupling part which are electrically connected with each other; the bottom coupling patch comprises a third coupling part and a fourth coupling part which are electrically connected with each other, wherein the projection part of the second coupling part and the third coupling part in the horizontal direction is overlapped, and the fourth coupling part extends downwards to be electrically connected with the circular reflection floor so as to be grounded.
Further, the first coupling part is composed of a rectangular structure and a triangular structure, and the second coupling part is of an L-shaped structure.
Further, the third coupling part is of an inverted L-shaped structure, and the fourth coupling part is of a rectangular structure.
The beneficial effects of the utility model are as follows: the traditional 2G/3G/LTE/5G frequency band demand is satisfied through first 5G/4G antenna element and second 5G/4G antenna element, and the wifi frequency band demand of 2.4GHz is satisfied through two wifi antenna elements, realizes adopting less antenna element to realize a plurality of frequency channels to, through be symmetrical arrangement with two wifi antenna elements, and, through mutually perpendicular first 5G/4G antenna element and second 5G/4G antenna element, make realize antenna overall structure's miniaturized design when guaranteeing high isolation.
In the first 5G/4G antenna unit or the second 5G/4G antenna unit, the effective radiation surface of the omni-directional antenna unit is increased by arranging the symmetrical coupling patch group above the radiation patch, so that the omni-directional gain effect of the omni-directional antenna unit is improved.
In every wifi antenna unit, through set up the coupling structure of constituteing by top coupling paster and first transmission line of buckling in the top of middle part coupling paster, realize improving the omnidirectional gain effect of wifi antenna unit.
Drawings
Fig. 1 is a schematic diagram of a MIMO combined antenna.
Fig. 2 is a schematic diagram of a wifi antenna unit.
Fig. 3 is a schematic diagram of a first 5G/4G antenna unit or a second 5G/4G antenna unit.
Fig. 4 is a graph of return loss parameters and peak gain performance of a wifi antenna unit.
Fig. 5 is a graph of return loss parameters and peak gain performance for a first 5G/4G antenna element or a second 5G/4G antenna element.
Fig. 6 is a gain variation diagram of a first 5G/4G antenna unit or a second 5G/4G antenna unit with and without symmetric coupling patch groups.
Fig. 7 is an EH plane radiation pattern of a wifi antenna unit at 2.45 GHz.
Fig. 8 is an EH plane radiation pattern at 0.8GHz, 2.1GHz, and 3.6GHz for the first 5G/4G antenna element or the second 5G/4G antenna element, respectively.
Fig. 9 is a graph of isolation performance for ports of a MIMO combined antenna.
The antenna comprises a 1-round reflecting floor, a 2-wifi antenna unit, a 21-first substrate, a 22-top coupling patch, a 23-first bending transmission line, a 24-middle coupling patch, a 241-first coupling part, a 242-second coupling part, a 25-bottom coupling patch, a 251-third coupling part, a 252-fourth coupling part, a 3-first 5G/4G antenna unit, a 31-second bending transmission line, a 32-radiation patch, a 33-rectangular patch, a 34-grounding line, a 35-gap and a 4-second 5G/4G antenna unit.
Description of the embodiments
In order that the utility model may be understood more fully, the utility model will be described with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete.
Referring to fig. 1, in this embodiment, a multi-frequency MIMO combined antenna with high gain includes a circular reflective floor 1, two wifi antenna units 2, a first 5G/4G antenna unit 3 and a second 5G/4G antenna unit 4, where the circular reflective floor 1 is a metal copper sheet with a circular sheet structure, and the thickness of the circular reflective floor 1 is 0.5mm. The traditional 2G/3G/LTE/5G frequency band requirements are met through the first 5G/4G antenna unit 3 and the second 5G/4G antenna unit 4, and the wifi frequency band requirements of 2.4GHz are met through the two wifi antenna units 2, so that a plurality of frequency bands are realized by adopting fewer antenna units.
In the present embodiment, the two wifi antenna units 2, the first 5G/4G antenna unit 3 and the second 5G/4G antenna unit 4 are all vertically arranged on the circular reflective floor 1, wherein the first 5G/4G antenna unit 3 is arranged at a middle position of the circular reflective floor 1 along a lateral extension. Two wifi antenna units 2 symmetry are arranged in the both sides of first 5G 4G antenna unit 3 in the longitudinal direction, wherein, the front of two wifi antenna units 2 is all towards first 5G 4G antenna unit 3 to, two wifi antenna units 2 are located the diameter on circular reflection floor 1, make the interval maximize of two wifi antenna units 2 and first 5G 4G antenna unit 3 on circular reflection floor 1, improve the isolation between two wifi antenna units 2 and the isolation between every wifi antenna unit 2 and first 5G 4G antenna unit 3. The second 5G/4G antenna unit 4 is disposed on one side of the first 5G/4G antenna unit 3, which is laterally far from the two wifi antenna units 2, so as to increase the distance between the second 5G/4G antenna unit 4 and each wifi antenna unit 2 on the circular reflective floor 1, improve the isolation between the second 5G/4G antenna unit 4 and each wifi antenna unit 2, and the first 5G/4G antenna unit 3 and the second 5G/4G antenna unit 4 are perpendicular to each other, so as to improve the isolation between the first 5G/4G antenna unit 3 and the second 5G/4G antenna unit 4. In this embodiment, the two wifi antenna units 2 are symmetrically arranged, and the first 5G/4G antenna unit 3 and the second 5G/4G antenna unit 4 are perpendicular to each other, so that the miniaturization design of the antenna overall structure is realized while the high isolation is ensured.
Referring to fig. 3, in the present embodiment, each of the first 5G/4G antenna unit 3 and the second 5G/4G antenna unit 4 includes a second substrate, a ground line 34 disposed on the back surface of the second substrate, and a second bending transmission line 31, a radiation patch 32 and a symmetrical coupling patch group disposed on the front surface of the second substrate. The second meander transmission line 31 is electrically connected to the bottom of the radiating patch 32, and the second meander transmission line 31 is electrically connected to the circular reflective floor 1 to be grounded, wherein the longitudinal dimension of the first 5G/4G antenna element 3 or the second 5G/4G antenna element 4 is reduced by employing the second meander transmission line 31 having a multi-segment meander structure. The radiation patch 32 has a partially surrounding structure, specifically, the radiation patch 32 adopts a C-shaped structure, wherein the region surrounded by the radiation patch 32 forms a triangular region, and the region surrounded by the radiation patch 32 has a function of impedance smoothing conversion. The opening direction of the radiation patch 32 is directed upward, and the symmetrical coupling patch group is arranged above the opening of the radiation patch 32. The symmetric coupling patch group includes two rectangular patches 33 symmetric to each other with respect to the center line of the second substrate.
In this embodiment, the current is fed into the radiation patch 32 by the second bending transmission line 31, then impedance smooth conversion is realized through the area surrounded by the radiation patch 32, the surface current is guided by the area surrounded by the radiation patch 32, impedance matching is improved, and then the radiation patch 32 is coupled with the symmetric coupling patch group, so that the two rectangular patches 33 of the symmetric coupling patch group generate coupling current. By arranging symmetrical coupling patch groups above the radiation patches 32, the distribution of the surface current of the main radiation structure is influenced, and the impedance matching is regulated; in addition, by arranging the symmetrical coupling patches, the effective radiation surface of the omni-directional antenna unit is increased, and the omni-directional gain effect of the omni-directional antenna unit is improved.
In the embodiment, the ground wire 34 is in a semi-surrounding pattern structure, wherein a gap 35 with a convex structure is preset in the ground wire 34, two chamfer structures are respectively arranged on two sides of the gap 35, and projections of the symmetrical coupling patch and the radiation patch 32 in the horizontal direction are overlapped in the gap 35. Through adjusting the specification size of the gap 35 and through setting up the chamfer structure, make first 5G/4G antenna element 3 and second 5G/4G antenna element 4 can work on 2G/3G/LTE/5G frequency channel.
Referring to fig. 2, in the present embodiment, each wifi antenna unit 2 includes a first substrate 21, and a top coupling patch 22, a first bending transmission line 23, a middle coupling patch 24, and a bottom coupling patch 25 sequentially arranged on the first substrate 21 along a vertical direction, where the first bending transmission line 23 is electrically connected to the top coupling patch 22, and a coupling structure is formed by the top coupling patch 22 and the first bending transmission line 23. The middle coupling patch 24 includes a first coupling portion 241 and a second coupling portion 242 that are electrically connected to each other, wherein the first coupling portion 241 is composed of a rectangular structure and a triangular structure, and the second coupling portion 242 is an L-shaped structure. The bottom coupling patch 25 includes a third coupling portion 251 and a fourth coupling portion 252 that are electrically connected to each other, wherein the third coupling portion 251 has an inverted L-shaped structure, and the fourth coupling portion 252 has a rectangular structure. The second coupling part 242 coincides with the projected portion of the third coupling part 251 in the horizontal direction, and the fourth coupling part 252 extends downward to be electrically connected to the circular reflective floor 1 to be grounded.
In the embodiment, on each wifi antenna unit 2, good impedance matching of the wifi antenna unit 2 on the 2.4GHz frequency band is achieved by adjusting the relative coupling distance between the middle coupling patch 24 and the bottom coupling patch 25; the coupling structure formed by the top coupling patch 22 and the first bending transmission line 23 is arranged above the middle coupling patch 24, so that the omnidirectional gain of the wifi antenna unit 2 is further improved; the longitudinal dimension of the wifi antenna unit 2 is reduced by employing the first meander transmission line 23 having a multi-segment meander structure.
In this embodiment, in order to facilitate understanding of the performance of the MIMO antenna, a further explanation is made below with reference to the specific drawings.
In this embodiment, referring to fig. 4, the return loss parameter and peak gain performance of the wifi antenna unit 2 are shown, and it is known from the figure that the wifi antenna unit 2 can cover 2.14-2.81GHz (S11 < -10 dB), and the peak gain of the wifi antenna unit 2 is > 3.12dBi.
In this embodiment, referring to fig. 5, the return loss parameters and peak gain performance diagrams of the first 5G/4G antenna unit 3 or the second 5G/4G antenna unit 4 are shown, and it can be seen from the diagrams that the first 5G/4G antenna unit 3 or the second 5G/4G antenna unit 4 can cover 0.61GHz-2.84GHz,3.26-4.ghz (S11 < -10 dB), and the peak gains of the omni-directional antenna units are respectively 0.6-3.2dBi,4-6.3dBi, and 4.7-7.6dBi in the corresponding frequency bands.
In this embodiment, referring to fig. 6, gain change diagrams of a symmetric coupling patch group and no symmetric coupling patch group are provided in the first 5G/4G antenna unit 3 or the second 5G/4G antenna unit 4 are shown, and it can be seen from the diagrams that by providing the symmetric coupling patch group, the effective radiation area of the omni-directional first 5G/4G antenna unit 3 or the second 5G/4G antenna unit 4 is increased, so that the gain of the full frequency band is improved by about 1dBi on average.
In this embodiment, referring to fig. 7, the EH plane radiation pattern of the wifi antenna unit 2 at 2.45GHz is shown, and it is known that the wifi antenna unit 2 has good omnidirectionality.
In this embodiment, referring to fig. 8, EH plane radiation patterns of the first 5G/4G antenna unit 3 or the second 5G/4G antenna unit 4 at 0.8GHz, 2.1GHz and 3.6GHz are shown, and it is known that the omni-directional antenna unit has good omni-directional property.
In this embodiment, referring to fig. 9, the isolation performance diagram of the port of the MIMO combined antenna is shown, and it can be seen from the diagram that the isolation of the port of the MIMO combined antenna can reach 20dB or more in the full frequency band, so as to meet the practical application requirements.
The above-described embodiments are merely preferred embodiments of the present utility model, and are not intended to limit the present utility model in any way. Any person skilled in the art, using the disclosure above, may make many more possible variations and modifications of the technical solution of the present utility model, or make many more modifications of the equivalent embodiments of the present utility model without departing from the scope of the technical solution of the present utility model. Therefore, all equivalent changes made according to the inventive concept are covered by the protection scope of the utility model without departing from the technical scheme of the utility model.
Claims (9)
1. A multi-frequency MIMO combined antenna with high gain, characterized in that: the novel antenna comprises a circular reflecting floor (1), two wifi antenna units (2), a first 5G/4G antenna unit (3) and a second 5G/4G antenna unit (4), wherein the two wifi antenna units (2), the first 5G/4G antenna unit (3) and the second 5G/4G antenna unit (4) are vertically arranged on the circular reflecting floor (1); the first 5G/4G antenna units (3) are arranged at the middle position of the round reflecting floor (1) in a transversely extending manner, wherein the two wifi antenna units (2) are symmetrically arranged at two sides of the first 5G/4G antenna units (3) in the longitudinal direction; the second 5G/4G antenna unit (4) is arranged on one side of the first 5G/4G antenna unit (3) in the transverse direction, and the first 5G/4G antenna unit (3) and the second 5G/4G antenna unit (4) are perpendicular to each other.
2. The multi-frequency MIMO combined antenna with high gain according to claim 1, wherein: the first 5G/4G antenna unit (3) and the second 5G/4G antenna unit (4) comprise a second substrate, a grounding wire (34) arranged on the back surface of the second substrate, a second bending transmission line (31), a radiation patch (32) and a symmetrical coupling patch group arranged on the front surface of the second substrate; the radiation patch (32) is of a partial surrounding structure, and the symmetrical coupling patch group is positioned above the opening of the radiation patch (32); the second bending transmission line (31) is electrically connected to the bottom of the radiation patch (32), and the second bending transmission line (31) is electrically connected to the circular reflective floor (1) to be grounded.
3. The multi-frequency MIMO combined antenna with high gain according to claim 2, wherein: the grounding wire (34) is of a closed graph structure, and the bottom of the grounding wire (34) is electrically connected with the circular reflecting floor (1).
4. The multi-frequency MIMO combined antenna with high gain according to claim 2, wherein: the grounding wire (34) is provided with a gap (35), wherein the projections of the symmetrical coupling patch group and the radiation patch (32) in the horizontal direction are overlapped in the gap (35).
5. The multi-frequency MIMO combined antenna with high gain according to claim 2, wherein: the symmetrical coupling patch group comprises two rectangular patches (33) which are symmetrical to each other with the center line of the second substrate.
6. The multi-frequency MIMO combined antenna with high gain according to claim 2, wherein: the radiation patch (32) adopts a C-shaped partial surrounding structure.
7. The multi-frequency MIMO combined antenna with high gain according to claim 1, wherein: each wifi antenna unit (2) comprises a first substrate (21), and a top coupling patch (22), a first bending transmission line (23), a middle coupling patch (24) and a bottom coupling patch (25) which are vertically and sequentially arranged on the first substrate (21), wherein the first bending transmission line (23) is electrically connected with the top coupling patch (22); the middle coupling patch (24) comprises a first coupling part (241) and a second coupling part (242) which are electrically connected with each other; the bottom coupling patch (25) comprises a third coupling part (251) and a fourth coupling part (252) which are electrically connected with each other, wherein the projection part of the second coupling part (242) and the third coupling part (251) in the horizontal direction is overlapped, and the fourth coupling part (252) extends downwards to be electrically connected with the circular reflecting floor (1) so as to be grounded.
8. The multi-frequency MIMO combined antenna with high gain according to claim 7, wherein: the first coupling part (241) is composed of a rectangular structure and a triangular structure, and the second coupling part (242) is of an L-shaped structure.
9. The multi-frequency MIMO combined antenna with high gain according to claim 7, wherein: the third coupling part (251) is of an inverted L-shaped structure, and the fourth coupling part (252) is of a rectangular structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320986798.6U CN220382312U (en) | 2023-04-27 | 2023-04-27 | Multi-frequency MIMO combined antenna with high gain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320986798.6U CN220382312U (en) | 2023-04-27 | 2023-04-27 | Multi-frequency MIMO combined antenna with high gain |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220382312U true CN220382312U (en) | 2024-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320986798.6U Active CN220382312U (en) | 2023-04-27 | 2023-04-27 | Multi-frequency MIMO combined antenna with high gain |
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| Country | Link |
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| CN (1) | CN220382312U (en) |
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- 2023-04-27 CN CN202320986798.6U patent/CN220382312U/en active Active
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