CN114725659A - Multifrequency wide bandwidth miniaturized MIMO vehicle-mounted antenna - Google Patents
Multifrequency wide bandwidth miniaturized MIMO vehicle-mounted antenna Download PDFInfo
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- CN114725659A CN114725659A CN202210427723.4A CN202210427723A CN114725659A CN 114725659 A CN114725659 A CN 114725659A CN 202210427723 A CN202210427723 A CN 202210427723A CN 114725659 A CN114725659 A CN 114725659A
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- 238000010168 coupling process Methods 0.000 claims abstract description 26
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- 238000005452 bending Methods 0.000 claims abstract description 8
- 239000000758 substrate Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 9
- 238000004891 communication Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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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
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
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Abstract
The invention discloses a multi-frequency wide-bandwidth miniaturized MIMO (multiple input multiple output) vehicle-mounted antenna, which comprises four groups of antenna units which are arranged in a parallel staggered manner, wherein each group of antenna units comprises a connecting plate, two groups of knuckle-shaped antennas which are rotationally and symmetrically arranged on two sides of the long axis direction of the connecting plate and two groups of coupled folded antennas which are rotationally and symmetrically arranged on two sides of the short axis direction of the connecting plate, each group of knuckle-shaped antennas comprises a supporting base block, a radiation block, a first radiation branch, a second radiation branch, a third radiation branch and a feed part, wherein the radiation block, the first radiation branch, the second radiation branch, the third radiation branch and the feed part are attached to the surface of the supporting base block, and the first radiation branch, the second radiation branch and the third radiation branch are all multi-knuckle bending structures; the feeding part is connected with the first radiating branch and is electrically connected with a feeding line preset on the connecting plate; each group of coupling folded antenna is in a strip annular folded structure.
Description
Technical Field
The invention relates to the technical field of wireless communication systems, in particular to a multi-frequency wide-bandwidth miniaturized MIMO vehicle-mounted antenna.
Background
With the development of wireless communication technology, frequency bands and functions related to vehicle-mounted communication are more and more, with the arrival of the 5G era, the vehicle-mounted communication also enters the 5G frequency band communication, people have more and more requirements on the vehicle-mounted communication, so that a multifunctional vehicle-mounted antenna is required to receive and transmit signals, the multifunctional characteristic requires that the antenna has multiple frequency bands, and meanwhile, a plurality of input ports and a plurality of output ports are required to meet the requirements of mass data transmission and multi-user use, namely, the MIMO technology, and meanwhile, the environmental limitation of vehicle-mounted installation is required to be met, and the antenna is required to have the characteristic of miniaturization. Therefore, designing a miniaturized MIMO vehicle-mounted antenna related to 5G multifrequency has important function in practical application. The planar patch antenna has the characteristics of convenience in manufacturing, low cost, high stability, wide covered frequency band and miniaturization, and the planar patch antenna has great significance in designing the vehicle-mounted antenna.
Therefore, when designing a multiband antenna, different antennas are often needed to realize different frequency bands due to the relationship between the size and the frequency of the antenna, but the antenna needs to be miniaturized due to the vehicle-mounted requirement, and multiple resonance points are needed to widen the bandwidth, so that the difficulty in realizing multifunction is high.
In the field of vehicle-mounted antennas, in order to meet the multifunctional requirements, a multi-band design is required, but in the actual function, higher stability is required, the antennas need to be placed reasonably, and certain isolation is achieved. The multiband antenna has a stable structure and is another design difficulty.
Since vehicle-mounted communication needs to have multiple inputs and multiple outputs to meet the communication requirements of multiple people, the function needs to be designed in the form of MIMO, however, MIMO inevitably causes an increase in volume, and therefore, the need for a miniaturized antenna under the requirement of MIMO is another difficulty.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a wide-bandwidth miniaturized MIMO vehicle-mounted antenna which can cover multiple frequencies of multiple frequency bands of 0.617GHz-0.96GHz, 1.427GHz-1.518GHz, 1.71GHz-2.17GHz, 2.3GHz-2.GHz, 3.3GHz-3.7GHz and 5.15GHz-5.925GHz, and has the characteristics of miniaturization, wide bandwidth, multiple frequency and low mutual coupling.
In order to achieve the above object, the multi-frequency wide-bandwidth miniaturized MIMO vehicle-mounted antenna provided by the present invention comprises four sets of antenna units arranged in parallel and staggered manner, wherein each set of antenna unit comprises a connecting plate, two sets of knuckle-shaped antennas rotationally and symmetrically arranged on two sides of a long axis direction of the connecting plate, and two sets of coupled folded antennas rotationally and symmetrically arranged on two sides of a short axis direction of the connecting plate, each set of knuckle-shaped antennas comprises a supporting base block, a radiating block attached to the surface of the supporting base block, a first radiating branch, a second radiating branch, a third radiating branch and a feeding portion, wherein the first radiating branch, the second radiating branch and the third radiating branch are all connected with the radiating block, and the first radiating branch, the second radiating branch and the third radiating branch are all multi-knuckle bending structures; the feeding part is connected with the first radiating branch and is electrically connected with a feeding line preset on the connecting plate; each group of coupling folded antenna is in a strip annular folded structure.
Furthermore, each group of knuckle antennas also comprises an L-shaped radiation part connected with the first radiation branch, and the L-shaped radiation part is arranged adjacent to the feed part.
Furthermore, the connecting plate shaping has two sets of splint that are rotational symmetry and arrange and are used for the centre gripping feeder port.
Further, the ab section of the first radiating branch is bent to be perpendicular to the bc section radiating surface of the first radiating branch, and the bc section of the first radiating branch is bent downwards to be perpendicular to the cd section radiating surface of the first radiating branch, wherein the ab section and the bc section of the first radiating branch are both located on the top surface of the supporting base block, and the cd section of the first radiating branch is located on the outer side surface of the supporting base block.
Further, the feed portion and the L-shaped radiation portion are both vertically connected to an ab-section radiation surface of the first radiation branch, wherein the feed portion and the L-shaped radiation portion are located on the inner side surface of the supporting base block.
Furthermore, the ef section of the second radiation branch is bent to be perpendicular to the fg section radiation surface of the second radiation branch, the fg section of the second radiation branch is bent downwards to be perpendicular to the gh section radiation surface of the second radiation branch, the ef section and the fg section of the second radiation branch are both located on the top surface of the support base block, and the gh section of the second radiation branch is located on the outer side surface of the support base block.
Further, the ij section of the third radiating branch is bent to be perpendicular to a jk section radiating surface of the third radiating branch, the jk section of the third radiating branch is bent downwards to be perpendicular to a kl section radiating surface of the third radiating branch, the kl section of the third radiating branch is bent inwards to be perpendicular to a lm section radiating surface of the third radiating branch, wherein the ij section and the jk section of the third radiating branch are both located on the top surface of the supporting base block, and the kl section of the third radiating branch is located on the outer side surface of the supporting base block; the lm section of the third radiating branch is located on the underside of the support substrate.
Further, the no section of the coupled folded antenna is folded to be perpendicular to the op section radiation surface of the coupled folded antenna, the op section of the coupled folded antenna is folded to be perpendicular to the pq section radiation surface of the coupled folded antenna, and the pq section of the coupled folded antenna is folded to be perpendicular to the qr section radiation surface of the coupled folded antenna, wherein the no section and the pq section of the coupled folded antenna are vertically arranged and parallel to each other, and the op section and the qr section of the coupled folded antenna are horizontally arranged and parallel to each other.
Further, the coupling folding antenna is vertically and vertically arranged on the connecting plate.
The invention adopts the scheme, and has the beneficial effects that: 1) through adopting four groups of antenna element parallel staggered arrangement's mode to two sets of knuckle type antennas and two sets of coupling folding antenna in every group antenna element all adopt rotational symmetry's arrangement mode, thereby effectively reduce the space and improve the isolation, on realizing eight port MIMO bases, still can realize the miniaturization of antenna, compare traditional antenna, increased a large amount of transmission ports on increasing less space, improved space utilization.
2) The knuckle antenna adopts a multi-knuckle bending structure, so that bending is carried out in space, current is changed, and a plurality of resonance points are obtained; the coupling folding antenna is vertically arranged, so that the working frequency band is increased and the bandwidth is widened on the basis of not increasing the size.
3) The knuckle-type antenna is attached to the surface by the aid of the supporting base block, so that stability and firmness of the antenna in the driving process of a vehicle are guaranteed; and the feeder line is clamped through the clamping plate, so that the effect of increasing the stability of the antenna is achieved, and the stable radiation is generated when the antenna works conveniently.
Drawings
Fig. 1 is an overall schematic diagram of a MIMO vehicle-mounted antenna.
Fig. 2 is a schematic structural diagram of a single group of antenna elements.
Fig. 3-4 are schematic diagrams of knuckle-type antennas.
Fig. 5 is a schematic diagram of a coupled folded antenna.
Fig. 6 is an S parameter diagram of a vehicle antenna simulation.
Fig. 7 is a gain diagram of a vehicle antenna.
Fig. 8 is a center frequency point pattern of each frequency band.
The antenna comprises 10 antenna units, 1 connecting plate, 11 clamping plates, 2-knuckle antennas, 21 supporting base blocks, 22 first radiating branches, 23 second radiating branches, 24 third radiating branches, 25 feeding portions, 26-L radiating portions, 24 second grounding patches, 3-coupling folded antennas and 4 feeding lines.
Detailed Description
To facilitate an understanding of the invention, the invention is described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention 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. 1-5, in the present embodiment, the multi-band wide-bandwidth miniaturized MIMO vehicle-mounted antenna includes four sets of antenna units 10 arranged in parallel and staggered manner, where each set of antenna unit 10 includes a connection board 1, two sets of knuckle antennas 2 arranged on two sides of the connection board 1 in the long axis direction in a rotational symmetry manner, and two sets of coupling folded antennas 3 arranged on two sides of the connection board 1 in the short axis direction in a rotational symmetry manner. Therefore, each group of antenna elements 10 is used as a group of 1 × 2 sub-arrays, so that a 2 × 4 MIMO array antenna is formed, and eight ports are realized.
In this embodiment, each knuckle antenna 2 includes a supporting base 20, and a radiation block 21, a first radiation branch 22, a second radiation branch 23, a third radiation branch 24 and a feeding portion 25 attached to the surface of the supporting base 20, where the supporting base 20 is made of teflon and has characteristics of insulation, high temperature resistance, and the like. Specifically, the end a of the first radiating branch 22, the end e of the second radiating branch 23 and the end i of the third radiating branch 24 are all connected to the radiating block 21. The first radiating branch 22, the second radiating branch 23 and the third radiating branch 24 are all of a multi-knuckle bending structure.
In this embodiment, the ab section of the first radiating branch 22 is bent to be perpendicular to the bc section radiating surface of the first radiating branch 22, and the bc section of the first radiating branch 22 is bent downward to be perpendicular to the cd section radiating surface of the first radiating branch 22, wherein the ab section and the bc section of the first radiating branch 22 are both located on the top surface of the supporting base 20, and the cd section of the first radiating branch 22 is located on the outer side surface of the supporting base 20.
In this embodiment, the ef section of the second radiating branch 23 is bent to be perpendicular to the fg section radiation surface of the second radiating branch 23, and the fg section of the second radiating branch 23 is bent downward to be perpendicular to the gh section radiation surface of the second radiating branch 23, where the ef section and the fg section of the second radiating branch 23 are both located on the top surface of the supporting base block 20, and the gh section of the second radiating branch 23 is located on the outer side surface of the supporting base block 20.
In this embodiment, the ij section of the third radiating branch 24 is bent to be perpendicular to the jk section radiating surface of the third radiating branch 24, the jk section of the third radiating branch 24 is bent downward to be perpendicular to the kl section radiating surface of the third radiating branch 24, the kl section of the third radiating branch 24 is bent inward to be perpendicular to the lm section radiating surface of the third radiating branch 24, wherein both the ij section and the jk section of the third radiating branch 24 are located on the top surface of the supporting base block 20, and the kl section of the third radiating branch 24 is located on the outer side surface of the supporting base block 20; the lm section of the third radiating branch 24 lies on the underside of the support matrix 20.
Therefore, the knuckle antenna 2 adopts the multi-knuckle bending structure mode, and utilizes the fact that each radiation branch is bent in a knuckle mode and attached to the supporting base block 20, so that the effective radiation area of the antenna is not reduced, the space occupancy rate of the antenna can be reduced, and miniaturization is achieved; secondly, by correspondingly designing the size and the bending angle of each radiating surface and the distance between adjacent radiating surfaces, a plurality of resonance points can be excited by utilizing the current coupling principle, so that the effects of multiple frequencies and ultra wide bands are realized. In addition, the radiation surface attached to the support base block 20 is designed to be a curved structure, and the function of omnidirectional radiation can be realized.
In this embodiment, the feeding portion 25 is connected to the first radiating branch 22, and the feeding portion 25 is electrically connected to the feeder 4 preset in the connection board 1, specifically, two sets of clamping plates 11 are formed on the connection board 1 and are rotationally symmetrically arranged and used for clamping ports of the feeder 4, the two sets of clamping plates 11 respectively clamp the ports of the two feeders 4, and the two feeders 4 are respectively electrically connected to the feeding portions 25 in the two sets of knuckle antennas 2. Because the connecting plate 1 is made of aluminum, the clamping plate 11 clamps the outer conductor of the feeder 4, so that the feeder 4 is more stable while the connecting plate 1 is connected, and the clamping plate 11 can supplement the vertical radiation area to a certain extent.
In this embodiment, each knuckle antenna 2 further includes an L-shaped radiating portion 26 connected to the first radiating branch 22, and the L-shaped radiating portion 26 is disposed adjacent to the feeding portion 25. Specifically, the feeding portion 25 and the L-shaped radiating portion 26 are both perpendicularly connected to the ab-segment radiating surface of the first radiating branch 22, wherein the feeding portion 25 and the L-shaped radiating portion 26 are located on the inner side surface of the supporting base block 20. Using the L-shaped radiating section 26 adjacent to the feeding section 25 so as to be close to the current output position, the direction of the current for the antenna greatly changes, thereby effectively expanding the bandwidth of the antenna.
In this embodiment, each group of coupling folded antennas 3 is in a band-shaped annular folded structure, and energy gathered on the connection board 1 by the two groups of coupling folded antennas 3 is guided to two sides of the short axis to serve as a parasitic patch for guiding current to form radiation in different directions, so as to achieve the purpose of covering omnidirectional space by radiation. Secondly, the coupling folding antennas 3 are vertically arranged on the connecting plate 1, so that on the basis of increasing less occupied space on a plane, the coupling folding antennas can have enlarged radiation areas, further broaden low-frequency bandwidths (617-824 MHz and 824-960 MHz) and realize the characteristic of miniaturization. In addition, the two coupling folding antennas 3 are used for coupling the two knuckle antennas 2, so that the overall impedance matching of the antenna is better, the bandwidth of the antenna is widened, and the impedance matching of low frequency is particularly optimized.
In this embodiment, the no section of the folded coupled antenna 3 is folded to be perpendicular to the op section radiation surface of the folded coupled antenna 3, the op section of the folded coupled antenna 3 is folded to be perpendicular to the pq section radiation surface of the folded coupled antenna 3, and the pq section of the folded coupled antenna 3 is folded to be perpendicular to the qr section radiation surface of the folded coupled antenna 3, wherein the no section and the pq section of the folded coupled antenna 3 are vertically arranged and parallel to each other, and the op section and the qr section are horizontally arranged and parallel to each other, so that a band-shaped annular folded structure is formed.
In order to facilitate understanding of the MIMO vehicle-mounted antenna, the following description is further made with reference to the accompanying drawings and specific parameter performance.
Referring to the S parameter diagram of the vehicle-mounted antenna simulation shown in FIG. 6, it can be seen that the impedance bandwidths of the frequency bands with the standing-wave ratio smaller than 3dB are (0.617GHz-0.96GHz), (1.427GHz-1.518GHz), (1.71GHz-2.17GHz), (2.3GHz-2.7GHz), (3.3GHz-3.7GHz), and (5.15GHz-5.925GHz), and the staggered arrangement mode has better performance.
As can be seen from the gain diagram of the vehicle-mounted antenna shown in fig. 7, the gain at low frequency is low, and the gain tends to increase with increasing operating frequency, and the variation range of the gain varies from 0.2dBi to 8.5dBi, and the radiation gain at operating frequency is high.
Referring to the central frequency point directional diagrams of the frequency bands shown in fig. 8, the vehicle-mounted antenna has the characteristics of multi-frequency and omnidirectional radiation.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way. Those skilled in the art can make many changes, modifications, and equivalents to the embodiments of the invention without departing from the scope of the invention as set forth in the claims below. Therefore, equivalent changes made according to the spirit of the present invention should be covered within the protection scope of the present invention without departing from the contents of the technical scheme of the present invention.
Claims (9)
1. The utility model provides a multifrequency wide bandwidth miniaturized MIMO vehicle antenna which characterized in that: comprises four groups of antenna units (10) which are arranged in a parallel and staggered manner, wherein each group of antenna units (10) comprises a connecting plate (1), two groups of knuckle-shaped antennas (2) which are rotationally and symmetrically arranged at two sides of the long axis direction of the connecting plate (1) and two groups of coupling folded antennas (3) which are rotationally and symmetrically arranged at two sides of the short axis direction of the connecting plate (1), each group of knuckle-shaped antennas (2) comprises a supporting base block (20), a radiation block (21), a first radiation branch (22), a second radiation branch (23), a third radiation branch (24) and a feed part (25) which are attached to the surface of the supporting base block (20), wherein the first radiation branch (22), the second radiation branch (23) and the third radiation branch (24) are all connected with a radiation block (21), the first radiating branch (22), the second radiating branch (23) and the third radiating branch (24) are all of a multi-knuckle bending structure; the feeding part (25) is connected with the first radiation branch (22), and the feeding part (25) is electrically connected with a feeder line (4) preset on the connecting plate (1); each group of coupling folding antennas (3) is of a strip annular folding structure.
2. The multi-band wide bandwidth miniaturized MIMO vehicle antenna of claim 1, wherein: each group of the knuckle type antenna (2) further comprises an L-shaped radiation part (26) connected with the first radiation branch (22), and the L-shaped radiation part (26) is arranged close to the feed part (25).
3. The multi-band wide-bandwidth miniaturized MIMO vehicular antenna of claim 1, wherein: two groups of clamping plates (11) which are rotationally symmetrically arranged and used for clamping ports of the feeder lines (4) are formed in the connecting plate (1).
4. The multi-band wide bandwidth miniaturized MIMO vehicle antenna of claim 1, wherein: the ab section of the first radiating branch (22) is bent to be perpendicular to the bc section radiating surface of the first radiating branch (22), the bc section of the first radiating branch (22) is bent downwards to be perpendicular to the cd section radiating surface of the first radiating branch (22), wherein the ab section and the bc section of the first radiating branch (22) are both located on the top surface of the supporting base block (20), and the cd section of the first radiating branch (22) is located on the outer side surface of the supporting base block (20).
5. The multi-band wide bandwidth miniaturized MIMO vehicle antenna of claim 4, wherein: the feed portion (25) and the L-shaped radiation portion (26) are both perpendicularly connected to an ab-section radiation surface of the first radiation branch (22), wherein the feed portion (25) and the L-shaped radiation portion (26) are located on the inner side surface of the supporting base block (20).
6. The multi-band wide bandwidth miniaturized MIMO vehicle antenna of claim 1, wherein: the ef section of the second radiation branch (23) is bent to be perpendicular to the fg section radiation surface of the second radiation branch (23), the fg section of the second radiation branch (23) is bent downwards to be perpendicular to the gh section radiation surface of the second radiation branch (23), wherein the ef section and the fg section of the second radiation branch (23) are both located on the top surface of the support base block (20), and the gh section of the second radiation branch (23) is located on the outer side surface of the support base block (20).
7. The multi-band wide bandwidth miniaturized MIMO vehicle antenna of claim 1, wherein: the ij section of the third radiation branch (24) is bent to be perpendicular to the jk section radiation surface of the third radiation branch (24), the jk section of the third radiation branch (24) is bent downwards to be perpendicular to the kl section radiation surface of the third radiation branch (24), the kl section of the third radiation branch (24) is bent inwards to be perpendicular to the lm section radiation surface of the third radiation branch (24), wherein the ij section and the jk section of the third radiation branch (24) are both located on the top surface of the support base block (20), and the kl section of the third radiation branch (24) is located on the outer side surface of the support base block (20); the lm section of the third radiating branch (24) is located on the underside of the support substrate (20).
8. The multi-band wide bandwidth miniaturized MIMO vehicle antenna of claim 1, wherein: the no section of the coupling folded antenna (3) is folded to be perpendicular to the op section radiation surface of the coupling folded antenna (3), the op section of the coupling folded antenna (3) is folded to be perpendicular to the pq section radiation surface of the coupling folded antenna (3), the pq section of the coupling folded antenna (3) is folded to be perpendicular to the qr section radiation surface of the coupling folded antenna (3), the no section and the pq section of the coupling folded antenna (3) are vertically arranged and are parallel to each other, and the op section and the qr section of the coupling folded antenna (3) are horizontally arranged and are parallel to each other.
9. The multi-band wide-bandwidth miniaturized MIMO vehicular antenna of claim 1, wherein: the coupling folding antenna (3) is vertically arranged on the connecting plate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210427723.4A CN114725659B (en) | 2022-04-22 | Multi-frequency broadband miniaturized MIMO vehicle-mounted antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210427723.4A CN114725659B (en) | 2022-04-22 | Multi-frequency broadband miniaturized MIMO vehicle-mounted antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114725659A true CN114725659A (en) | 2022-07-08 |
| CN114725659B CN114725659B (en) | 2024-07-16 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112563730A (en) * | 2020-11-27 | 2021-03-26 | 南京航空航天大学 | High-isolation ultra-wideband MIMO antenna suitable for 5G full-band communication |
| WO2021125382A1 (en) * | 2019-12-18 | 2021-06-24 | 엘지전자 주식회사 | Antenna system mounted in vehicle |
| CN113851826A (en) * | 2021-09-30 | 2021-12-28 | 广东中元创新科技有限公司 | Single-polarization low-out-of-roundness indoor distributed antenna |
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021125382A1 (en) * | 2019-12-18 | 2021-06-24 | 엘지전자 주식회사 | Antenna system mounted in vehicle |
| CN112563730A (en) * | 2020-11-27 | 2021-03-26 | 南京航空航天大学 | High-isolation ultra-wideband MIMO antenna suitable for 5G full-band communication |
| CN113851826A (en) * | 2021-09-30 | 2021-12-28 | 广东中元创新科技有限公司 | Single-polarization low-out-of-roundness indoor distributed antenna |
Non-Patent Citations (1)
| Title |
|---|
| 李直;徐自强;向东红;李元勋;吴孟强;: "一种新型的双频段超宽带双极化天线", 电子元件与材料, vol. 35, no. 11, 28 October 2016 (2016-10-28) * |
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