CN111009722A - Integrated MIMO antenna system - Google Patents
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- CN111009722A CN111009722A CN201911421648.5A CN201911421648A CN111009722A CN 111009722 A CN111009722 A CN 111009722A CN 201911421648 A CN201911421648 A CN 201911421648A CN 111009722 A CN111009722 A CN 111009722A
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- 238000004891 communication Methods 0.000 abstract description 6
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- 238000010586 diagram Methods 0.000 description 20
- 230000001939 inductive effect Effects 0.000 description 13
- 238000010168 coupling process Methods 0.000 description 10
- 238000005859 coupling reaction Methods 0.000 description 10
- 230000008878 coupling Effects 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 7
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- 230000001965 increasing effect Effects 0.000 description 4
- 230000003071 parasitic effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 2
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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
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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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
- H01Q21/00—Antenna arrays or systems
- H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
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Abstract
The invention discloses an integrated MIMO antenna system, which comprises a ground plate, a resonant conductor and a first inductance element connected to the resonant conductor, wherein the resonant conductor is connected with the ground plate to form an annular resonant body, two end areas of the resonant conductor are strong current areas, the directions of current modes are opposite, the middle area is a weak current area, and the first inductance element is formed in the weak current area. By implementing the invention, the two antenna units are integrated into an integrated structure, thereby realizing a high-integration, high-compactness and high-isolation MIMO antenna system. The invention can be applied to various wireless communication devices, and is particularly suitable for application of large-scale arrays in terminal equipment.
Description
Technical Field
The invention relates to the technical field of communication antennas, in particular to an integrated MIMO antenna system which can be used for various wireless communication devices.
Background
Antennas have become an integral device in various wireless devices for transmitting and receiving electromagnetic wave signals. The MIMO (Multiple-Input Multiple-Output) technology employs Multiple antenna devices to transmit and receive simultaneously, which can greatly improve the wireless transmission rate without increasing the transmission power or increasing the working frequency spectrum, and is one of the core technologies of fourth-generation mobile communication and fifth-generation communication systems. To ensure excellent MIMO characteristics, high isolation or low coupling between antennas must be achieved to reduce the degree of correlation between antennas. However, due to the limited space of modern wireless devices, the antenna spacing is small, and the signal interference between antennas is large, which seriously affects the performance of the MIMO system. The traditional method realizes high isolation by enlarging the distance between the antennas, and is difficult to integrate more antenna devices into the wireless equipment, so that the current requirement on high transmission rate transmission cannot be met.
Especially with the layout and popularization of fifth generation communication systems, large-scale antenna arrays are becoming a trend, and thus the demand for compact MIMO antenna systems is increasing. In the prior art, the isolation between the antennas is improved mainly by introducing parasitic resonance, introducing a decoupling network, utilizing an orthogonal mode and the like.
On the one hand, introducing a new parasitic structure between two antennas is one of the most common methods for improving isolation, and the parasitic structure can generate a coupling route with opposite phases to cancel the original coupling between the antennas, thereby improving the antenna isolation. The parasitic structures may be of the slot, loop, strip, suspended structure, etc. However, this method requires an additional structural body, occupies a large space, and is not favorable for the miniaturization design of the antenna.
On the other hand, the decoupling network usually adopts methods such as lumped element circuits or neutral lines to counteract the coupling between the antennas, so as to effectively realize the design of the compact MIMO antenna. However, this method requires more components or occupies a larger circuit area, and is currently only suitable for monopole antennas or inverted F antennas.
In addition, the antennas are orthogonally arranged or an orthogonal current mode is excited, so that a high-isolation and compact MIMO antenna system can be well realized without an additional decoupling structure or circuit. However, this method requires a large antenna size, and it is difficult to achieve integration and miniaturization of the MIMO antenna system.
The above prior art needs two independent antenna units, and has a larger antenna size and a more complicated decoupling structure, so that a compact MIMO system cannot be realized, and has a great application limitation.
Therefore, there is a need for an integrated MIMO antenna system that integrates two antenna units into the same structure and does not require an additional decoupling structure, thereby realizing a structurally simple and highly integrated MIMO antenna system.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides an integrated MIMO antenna system, which integrates two antenna units into an integrated structure, and realizes a highly integrated, highly compact and highly isolated MIMO antenna system. The invention can be applied to various wireless communication devices, and is particularly suitable for application of large-scale arrays in terminal equipment.
The technical effect to be achieved by the invention is realized by the following scheme: the integrated MIMO antenna system comprises a ground plate, a resonant conductor and a first inductance element connected to the resonant conductor, wherein the resonant conductor is connected with the ground plate to form an annular resonant body, areas at two ends of the resonant conductor are high-current areas, directions of current modes are opposite, an area in the middle of the resonant conductor is a low-current area, and the first inductance element is formed in the low-current area.
Preferably, the antenna further comprises a first feed and a second feed, one end of the resonant conductor is connected with the ground plate through the first feed, and the other end of the resonant conductor is connected with the ground plate through the second feed.
Preferably, the antenna further comprises a first excitation structure and a second excitation structure, and the first excitation structure and the second excitation structure are used for controlling the impedance matching of the MIMO antenna system.
Preferably, the resonant cavity further comprises a third feed and a fourth feed, one end of the first excitation structure is connected with the third feed, the third feed is connected with the ground plate, and the other end of the first excitation structure is connected with the resonant wire or the ground plate; one end of the second excitation structure is connected with the fourth feed, the fourth feed is connected with the ground plate, and the other end of the second excitation structure is connected with the resonant wire or the ground plate.
Preferably, the first actuating structure comprises a first component and the second actuating structure comprises a second component.
Preferably, at least one second inductance element is further connected to the resonant conductor, and the second inductance element is located in a strong current region of the resonant conductor.
Preferably, the inner side and/or the outer side of the resonance lead is/are also provided with branches.
Preferably, the inner side of the resonant wire is provided with a first branch which is formed between the resonant wire and the ground plate and is connected with the ground plate.
Preferably, the outer side of the resonant conductor is further connected with a second branch and a third branch respectively, the second branch and the third branch are formed in the high-current areas at the two ends of the resonant conductor respectively, one end of the second branch is connected with the resonant conductor, the other end of the second branch is open or connected with the ground plate through a third component, one end of the third branch is connected with the resonant conductor, and the other end of the third branch is open or connected with the ground plate through a fourth component.
Preferably, the ground plate further includes a clearance area, the clearance area is a groove hollowed at a side edge of the ground plate, and the resonant wire is disposed at one side of an opening of the clearance area.
The invention has the following advantages:
1) different from the prior art, the invention provides an integrated MIMO antenna system, two antenna units are integrated into the same structure, and no down-coupling structure is needed;
2) the invention realizes a highly compact MIMO antenna system, which has an integrated structure and more compact antenna size while realizing high isolation and low correlation.
Drawings
Fig. 1a is a schematic structural diagram of a first specific implementation of an integrated MIMO antenna system according to a first embodiment of the present invention.
Fig. 1b is a schematic structural diagram of a second specific implementation of the integrated MIMO antenna system according to the first embodiment of the present invention.
Fig. 1c is a schematic current distribution diagram of the integrated MIMO antenna system according to the present invention.
Fig. 2a is a schematic structural diagram of a first specific implementation of an integrated MIMO antenna system in the second embodiment of the present invention.
Fig. 2b is a schematic structural diagram of a second specific implementation of the integrated MIMO antenna system in the second embodiment of the present invention.
Fig. 3a shows a schematic diagram of another embodiment (example 1) of the integrated MIMO antenna system of the present invention.
Fig. 3b shows a schematic diagram of another embodiment (example 2) of the integrated MIMO antenna system of the present invention.
Fig. 3c shows a schematic diagram of another embodiment (example 3) of the integrated MIMO antenna system of the present invention.
Fig. 3d shows a schematic diagram of another embodiment (example 4) of the integrated MIMO antenna system of the present invention.
Fig. 4a is a schematic structural diagram of a first specific implementation of an integrated MIMO antenna system in the third embodiment of the present invention.
Fig. 4b is a schematic structural diagram of a second specific implementation of an integrated MIMO antenna system in the third embodiment of the present invention.
Fig. 5 shows an S parameter diagram of the integrated MIMO antenna system in a single frequency mode according to the present invention.
Fig. 6 shows an S parameter diagram of an integrated MIMO antenna system in a dual-frequency mode according to the present invention.
Detailed Description
The invention is described in detail below with reference to the drawings, wherein examples of the embodiments are shown in the drawings, wherein like or similar reference numerals refer to like or similar components or components having like or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or components must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner and are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," "disposed," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other or mutually interacted. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
By deeply researching the coupling principle of the MIMO antenna, the invention provides a simple and efficient coupling reduction method, so that an integrated MIMO antenna system is formed, and the integrated MIMO antenna system has wider application prospect.
Example one
Fig. 1 shows a schematic structural diagram of an integrated MIMO antenna system according to an embodiment of the present invention.
As shown in fig. 1a, the integrated MIMO antenna system includes a ground plane 102, a first power feed 110a, a second power feed 110b, a resonant conductor 120, and a first inductance element 121 connected to the resonant conductor 120.
Fig. 1b shows a modified structure of the first embodiment of the present invention.
As shown in fig. 1b, the integrated MIMO antenna system includes a ground plane 102, a third power feed 110c, a first excitation structure 111a, a fourth power feed 110d, a second excitation structure 111b, a resonant conductor 120, and a first inductance element 121 connected to the resonant conductor 120.
First excitation structure 111a is formed in a high current region at one end of resonant wire 120, and one end of first excitation structure 111a is connected to third power feed 110c, and the other end of first excitation structure 111a is connected to resonant wire 120, and third power feed 110c is connected to ground plate 102. The first excitation structure 111a includes a first component 112a, and the first component 112a may be a conductive line, an inductive element, or a capacitive element. Second excitation structure 111b is formed in the high current region at the other end of resonant wire 120, and one end of second excitation structure 111b is connected to fourth power feed 110d, and the other end of second excitation structure 111b is connected to resonant wire 120, and fourth power feed 110d is connected to ground plate 102. The second excitation structure 111b comprises a second component 112b, and the second component 112b may be a conductive line, an inductive element or a capacitive element. The first excitation structure 111a and the second excitation structure 111b control impedance matching of the integrated MIMO antenna system as an excitation loop of the integrated MIMO antenna system. The first inductance element 121 is used to adjust the high-order mode of the resonant conductive line 120, which can effectively improve the isolation of the high-current region at the two ends of the resonant conductive line 120.
According to an embodiment of the present invention, the inductive element has an inductive component, and may be a lumped element, such as a chip inductor, a chip resistor, etc., or a distributed element, such as a wire, a coil, etc. Further, the inductance element may be constituted by a single inductance element or may be constituted by a plurality of inductance elements connected to each other.
According to an embodiment of the present invention, the capacitive element has a capacitive component, and may be a lumped element, such as a chip capacitor, a varactor, a transistor, etc., or a distributed element, such as a parallel wire, a transmission line, etc. The capacitor element may be constituted by a single capacitor element or a plurality of capacitor elements connected to each other. In order to obtain a certain capacitance, a combination of a plurality of elements may be used instead of the capacitive element, for example, the capacitive element may be replaced by a combined structure of a capacitive element and an inductive element.
Fig. 1c is a schematic current distribution diagram of the integrated MIMO antenna system in the present invention to explain the working principle of the present invention.
As shown in fig. 1c, a strong current distribution occurs in both end regions of the resonant conductive wire 120 and the current modes are opposite in direction, and a weak current distribution occurs in the middle region of the resonant conductive wire 120. Thus, the current length of the resonant wire 120 in the present invention is about one-half wavelength to generate antenna resonance. The first inductance element 121 is located in a weak current region of the resonant conductor 120, and thus the first inductance element 121 does not affect the resonant frequency of the antenna, and only changes the resonant frequency of the higher-order mode. Thus, the first inductance element 121 in the present invention can control a high-order mode that can effectively improve the isolation between the high current regions at both ends of the resonant conductive wire 120, thereby implementing an integrated MIMO antenna system.
Example two
Fig. 2 is a schematic structural diagram of an integrated MIMO antenna system according to a second embodiment of the present invention.
As shown in fig. 2a, the integrated MIMO antenna system includes a ground plane 102, a first power feed 210a, a second power feed 210b, a resonant conductor 220, and a first inductance element 221 connected to the resonant conductor 220.
Fig. 2b shows a modified structure of the second embodiment of the present invention.
As shown in fig. 2b, the integrated MIMO antenna system includes a ground plane 102, a third power feed 210c, a first excitation structure 211a, a fourth power feed 210d, a second excitation structure 211b, a resonant wire 220, and a first inductance element 221 connected to the resonant wire 220.
The resonant conductive line 220 is disposed outside the ground plate, both ends of the resonant conductive line are directly connected to the ground plate 102, the ground terminals of both ends of the resonant conductive line 220 are disposed adjacent to each other, the regions of both ends of the resonant conductive line 120 are high current regions, the middle region is a low current region, and the first inductance element 221 is formed in the low current region. The resonant conductive line 220 and the ground plate 102 form a ring-shaped resonant body.
It should be understood by those skilled in the art that the high current regions at the two ends of the resonant conductive wire 220 may be symmetrically or asymmetrically disposed, preferably symmetrically; the first excitation structure 211a and the second excitation structure 211b may be symmetrically or asymmetrically arranged, and preferably, the first excitation structure 211a and the second excitation structure 211b that are symmetrically arranged may be simultaneously formed in a strong current region, a weak current region, or a strong current region and a weak current region, respectively; the first excitation structure 211a and the second excitation structure 211b may have the same structure, or may not have the same structure, and preferably have the same structure.
Fig. 3 shows a schematic diagram of another embodiment of the integrated MIMO antenna system of the present invention.
As shown in fig. 3, the integrated MIMO antenna system includes a ground plane 102, a first power feed 410a, a second power feed 410b, a resonant conductor 420, and a first inductive element 421 connected to the resonant conductor 420. Both end regions of the resonant conductive line 420 are high current regions, and the middle region is a low current region, and the first inductance element 421 is formed in the low current region.
As shown in fig. 3a and fig. 1c, at least one second inductance element (two second inductance elements 422a, 422b are shown) is connected to the resonant conductive wire 420, and the second inductance element is located in a strong current region of the resonant conductive wire 420, so that the length of the resonant conductive wire 420 can be effectively reduced, and the miniaturization of the antenna can be realized. The other circuit configurations are the same as in fig. 1 a. The second inductance element can be one or more than one, and can also be arranged asymmetrically, and is preferably arranged symmetrically.
In the embodiment of the present invention, the inner side and/or the outer side of the resonant conductive wire 420 are/is further provided with branches, and the branches can increase the capacitance component of the resonant conductive wire 420, thereby effectively reducing the length of the resonant conductive wire 420 and realizing the miniaturization of the antenna.
Specifically, as shown in fig. 3b, the integrated MIMO antenna system further includes a first branch 423, where the first branch 423 is formed between the resonant conductive line 420 and the ground plane 102 and connected to the ground plane 102 (i.e., inside the resonant conductive line 420), so that a capacitance component of the resonant conductive line 420 can be increased, and thus a length of the resonant conductive line 420 can be effectively reduced, and miniaturization of the antenna can be achieved. The other circuit configurations are the same as in fig. 1 a.
As shown in fig. 3c, a second branch 424a and a third branch 424b are further connected to both outer sides of the resonant conductive wire 420, respectively, and the second branch 424a and the third branch 424b are formed in a high current region of the resonant conductive wire 420. Preferably, the second branch 424a and the third branch 424b are connected to the resonant wire 420 at one end and are open at the other end. The resonant conductor 420 to which the second branch 424a and the third branch 424b are connected may generate two resonances, constituting a dual-frequency MIMO antenna. The other circuit configurations are the same as in fig. 1 a. The second branch 424a and the third branch 424b may be symmetrically disposed, or may be asymmetrically disposed, and preferably symmetrically disposed.
As shown in fig. 3d, a second branch 424a and a third branch 424b are connected to the outer side of the resonant conductive wire 420, respectively, and the second branch 424a and the third branch 424b are formed in a strong current region of the resonant conductive wire 420. The second branch 424a has one end connected to the resonant conductive line 420 and the other end electrically connected to the ground plane 102 through the third component 425 a. The third component 425a is a conductive wire, an inductive element, or a capacitive element. The third branch 424b has one end connected to the resonant conductive line 420 and the other end electrically connected to the ground plane 102 through the fourth component 425 b. The fourth component 425b is a conductive line, an inductive element, or a capacitive element. The resonant conductor 420 to which the second branch 424a and the third branch 424b are connected may generate two resonances, constituting a dual-frequency MIMO antenna. The other circuit configurations are the same as in fig. 1 a.
EXAMPLE III
Fig. 4 is a schematic structural diagram of an integrated MIMO antenna system according to a third embodiment of the present invention.
As shown in fig. 4a, the unitary MIMO antenna system includes a ground plane 102, a clearance region 304, a first feed 310a, a second feed 310b, a resonant conductor 320, and a first inductive element 321 connected to the resonant conductor 320. The clearance area 304 is a recess hollowed out of the side edge of the ground plate 102.
The resonant conductive line 320 is disposed at an opening side of the clearance area 304, one end of the resonant conductive line is connected to the first power supply 310a for direct power supply, the other end of the resonant conductive line is connected to the second power supply 310b for direct power supply, the first power supply 310a and the second power supply 310b are respectively connected to the ground plane 102, two end regions of the resonant conductive line 320 are high current regions, a middle region thereof is a low current region, and the first inductance element 321 is formed in the low current region. The resonant conductor 320 and the ground plate 102 form a ring resonator, which is a resonant loop of the integrated MIMO antenna system and has a length of about one-half wavelength. The first inductance element 321 is connected to the middle region of the resonant conductive wire 320 to adjust the higher-order mode of the resonant conductive wire 320, which can effectively improve the high isolation between the high current regions at the two ends of the resonant conductive wire 120.
Fig. 4b shows a modified structure of the third embodiment of the present invention.
As shown in fig. 4b, the integrated MIMO antenna system includes a ground plane 102, a clearance region 304, a third feed 310c, a first excitation structure 311a, a fourth feed 310d, a second excitation structure 311b, a resonant wire 320, and a first inductance element 321 connected to the resonant wire 320.
The resonant conductive line 320 is disposed at one side of the opening of the clearance area 304, and both ends of the resonant conductive line 320 are directly connected to the ground plate 102, the two end regions of the resonant conductive line 320 are high current regions, the middle region is a low current region, and the first inductance element 321 is formed in the low current region. The resonant conductive wire 320 and the ground plate 102 form a ring-shaped resonant body.
The first excitation structure 311a is formed in the free area and is formed at one end of the resonant conductive line 320, which is connected to the third power feed 310c at one end and the ground plate 102 at the other end, and the third power feed 310c is connected to the ground plate 102. The first excitation structure 311a includes a first component 312a, and the first component 312a may be a conductive line, an inductive element, or a capacitive element. The second excitation structure 311b is also formed in the clearance area and at the other end of the resonant conductive line 320, which is connected to the fourth power feed 310d at one end and the ground plate 102 at the other end, and the fourth power feed 310d is connected to the ground plate 102. The second excitation structure 311b comprises a second component 312b, and the second component 312b may be a conductive line, an inductive element or a capacitive element. The first excitation structure 311a and the second excitation structure 311b control impedance matching of the integrated MIMO antenna system as an excitation loop of the integrated MIMO antenna system. The first inductance element 321 is used to adjust the higher-order mode of the resonant conductive line 320, which can effectively improve the isolation between the high-current regions at the two ends of the resonant conductive line 120.
According to the above embodiments of the present invention, it should be understood that the excitation structure of the present invention may have different expressions according to its type, location, connection mode, etc., and the antenna may be fed by using the excitation loop of any conventional structure in the prior art, and thus, the present invention does not specifically limit the specific structure, type, connection mode, etc. of the excitation loop, and the excitation structures in all the drawings of the embodiments of the present invention are only examples.
In the above embodiments of the present invention, it should be understood by those skilled in the art that the resonant structure, the excitation structure, the branch, and the ground plate may be disposed in the same plane, or may be disposed in different planes, and all the drawings of the embodiments of the present invention are illustrated in the same plane, and should not be taken as a limitation.
Fig. 5 shows an S parameter diagram of the integrated MIMO antenna system in a single frequency mode according to the present invention.
As shown in fig. 5, a first curve 5a is the reflection coefficient generated by the first antenna, and a second curve 5b is the reflection coefficient generated by the second antenna. The center frequencies of the two antennas are both around 3.5GHz, and the two antennas have broadband characteristics. The third curve 5c is a reverse transmission coefficient between the two antennas, and represents a coupling degree between the antennas, and it can be known that the third curve 5c generates a coupling peak valley in the operating frequency band, so that a high isolation degree (more than 15 dB) between the antennas can be ensured. In addition, the radiation efficiency of the integrated MIMO antenna is more than 80%, and the correlation coefficient (ECC) obtained in simulation is lower than 0.1. Therefore, the integrated MIMO antenna system has the characteristics of high isolation, good radiation performance, low correlation and the like, and is suitable for application of the MIMO system.
Fig. 6 shows an S parameter diagram of an integrated MIMO antenna system in a dual-frequency mode according to the present invention.
Referring to fig. 4, it can be seen that the integrated MIMO antenna system of the present invention can generate one or more resonances, and achieve high isolation in a single band or multiple bands. As shown in fig. 6, the first curve 6a and the second curve 6b are reflection coefficients generated by the first antenna and the second antenna, respectively. The two antennas simultaneously generate resonance in two frequency bands of 3.5GHz and 5.5 GHz. The third curve 6c is the reverse transmission coefficient between the antennas, which represents the coupling degree between the antennas, and it can be known that the isolation degree in both frequency bands is above 10 dB. Therefore, the coupling-down technology in the invention is also suitable for the integrated MIMO antenna system in the multiband mode.
In summary, compared with the prior art, the embodiment has the following characteristics:
1) the invention realizes a highly compact MIMO antenna system, realizes high isolation and low correlation, has an integrated structure, has more compact antenna size and has wide application prospect.
2) The integrated MIMO antenna system is not only suitable for single frequency bands, but also suitable for multiple frequency bands.
While the invention has been described with respect to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. The integrated MIMO antenna system is characterized by comprising a ground plate, a resonant conductor and a first inductance element connected to the resonant conductor, wherein the resonant conductor is connected with the ground plate to form an annular resonant body, areas at two ends of the resonant conductor are high-current areas, directions of current modes are opposite, an area in the middle of the resonant conductor is a low-current area, and the first inductance element is formed in the low-current area.
2. The integrated MIMO antenna system of claim 1, further comprising a first feed and a second feed, wherein one end of the resonant wire is connected to the ground plane through the first feed, and the other end of the resonant wire is connected to the ground plane through the second feed.
3. The unitary MIMO antenna system of claim 2, further comprising a first excitation structure and a second excitation structure, the first excitation structure and the second excitation structure being configured to control impedance matching of the MIMO antenna system.
4. The integrated MIMO antenna system of claim 3, further comprising a third feed and a fourth feed, wherein one end of the first excitation structure is connected to the third feed, the third feed is connected to the ground plane, and the other end of the first excitation structure is connected to the resonant wire or the ground plane; one end of the second excitation structure is connected with the fourth feed, the fourth feed is connected with the ground plate, and the other end of the second excitation structure is connected with the resonant wire or the ground plate.
5. The unitary MIMO antenna system of claim 4, wherein the first actuating structure comprises a first component and the second actuating structure comprises a second component.
6. The integrated MIMO antenna system of claim 1, wherein at least one second inductor element is further connected to the resonant conductor, and the second inductor element is located in a strong current region of the resonant conductor.
7. An integrated MIMO antenna system according to claim 1, wherein the resonant conductor is further branched at an inner side and/or an outer side thereof.
8. An integrated MIMO antenna system according to claim 7, wherein the resonant conductor is provided at an inner side thereof with a first branch formed between the resonant conductor and the ground plate and connected to the ground plate.
9. The integrated MIMO antenna system of claim 8, wherein the resonant conductive line is further connected at an outer side thereof with a second branch and a third branch, the second branch and the third branch are respectively formed at both ends of the resonant conductive line in high current regions, one end of the second branch is connected to the resonant conductive line, the other end is open or connected to the ground plane through a third component, one end of the third branch is connected to the resonant conductive line, and the other end is open or connected to the ground plane through a fourth component.
10. The integrated MIMO antenna system of any one of claims 1 to 9, wherein the ground plate further includes a clearance area, the clearance area being a recess hollowed out at a side edge of the ground plate, and the resonant wire is disposed at an open side of the clearance area.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111463571A (en) * | 2020-04-21 | 2020-07-28 | 曲龙跃 | Self-decoupling MIMO antenna system based on orthogonal current mode |
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