CN113451771A - Antenna device and communication terminal - Google Patents
Antenna device and communication terminal Download PDFInfo
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- CN113451771A CN113451771A CN202010215492.1A CN202010215492A CN113451771A CN 113451771 A CN113451771 A CN 113451771A CN 202010215492 A CN202010215492 A CN 202010215492A CN 113451771 A CN113451771 A CN 113451771A
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- antenna radiator
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
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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
- H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
Abstract
The embodiment of the invention provides an antenna device and a communication terminal, wherein the antenna device comprises a first antenna radiator and a second antenna radiator which are adjacently arranged in a space position and have a coupling relation, the first antenna radiator and the second antenna radiator are provided with adjacent first ends with minimum working current or maximum working current, the antenna device also comprises a first connecting circuit which is electrically connected with the first ends of the first antenna radiator and the second antenna radiator, and the first connecting circuit introduces second working current on the second antenna radiator into the first antenna radiator so as to offset second coupling current of the first antenna radiator coupled from the second antenna radiator; and introducing the first operating current on the first antenna radiator into the second antenna radiator to cancel the first coupling current coupled by the second antenna radiator from the first antenna radiator, thereby reducing or even eliminating interference caused by the coupling current between adjacent first and second antenna radiators on the antenna performance.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to an antenna device and a communication terminal.
Background
At present, 5G communication terminals (such as 5G mobile phones) are the focus of competition of all terminal manufacturers, and the 5G communication terminals need the support of 5G antennas, so how to design antennas meeting the requirements of 5G communication is particularly important. The 5G communication terminal needs to arrange 10 antennas inside the terminal, and the 5G communication terminal mainly relies on MIMO (multiple Input multiple Output) antenna technology, so how to design MIMO antennas in a narrow area inside the terminal becomes quite important.
When a plurality of antennas are arranged in a narrow space in a terminal, it is difficult to avoid that adjacent antennas are arranged at spatial positions, and for the purpose of avoiding negative effects on the antenna performance caused by coupling current between adjacent antennas as much as possible when the antennas are required to be arranged adjacently at spatial positions, the arrangement mode of the antennas for two adjacent days is shown in fig. 1 at present, in order to increase the isolation strength between an antenna a and an antenna B, one of the two antennas is to arrange the distance between the antenna a and the antenna B as much as possible to reduce the coupling degree between the antenna a and the antenna B, but the requirement of arranging a plurality of antennas in the narrow space in the terminal is difficult to meet; the second is to set the antenna a and the antenna B to operate in different frequency bands, for example, the antenna a operates in a medium-high frequency band, and the antenna B operates in a low-frequency band, so as to reduce the influence of coupling between the antenna a and the antenna B on the antenna performance as much as possible, but the MIMO antenna needs a plurality of antennas operating in the same frequency band, and thus the design requirement of the MIMO antenna cannot be met.
In view of the above problems, there has been no good solution, and there is no prior art that can design spatially adjacent antennas as MIMO antennas. For a communication terminal mainly relying on MIMO antenna technology 5G, a plurality of antennas operating in the same frequency band must be designed. Therefore, it is a technical problem to be solved urgently at present to reduce the interference of the coupling current between the adjacent antennas at the spatial position to the antenna performance and to improve the isolation between the adjacent antennas.
Disclosure of Invention
The antenna device and the communication terminal provided by the embodiment of the invention solve the problems of reducing the interference of the coupling current between adjacent antennas at a spatial position on the antenna performance and improving the isolation between the adjacent antennas.
In order to solve the above technical problem, an embodiment of the present invention provides an antenna apparatus, where the antenna apparatus includes a first antenna radiator and a second antenna radiator that are adjacent to each other in spatial position and have a coupling relationship;
the first end of the first antenna radiator and the first end of the second antenna radiator are two spatially adjacent ends, and the second end of the first antenna radiator and the second end of the second antenna radiator are two spatially remote ends;
the first feed point of the first antenna radiator and the second feed point of the second antenna radiator are respectively arranged at the first end of the first antenna radiator and the first end of the second antenna radiator, or are respectively arranged at the second end of the first antenna radiator and the second end of the second antenna radiator;
or the like, or, alternatively,
a first feed point of the first antenna radiator is arranged at a second end of the first antenna radiator, a second feed point of the second antenna radiator is arranged at a first end of the second antenna radiator, the second feed point is a coupling feed type feed point, and the first feed point is a direct connection type feed point;
the antenna device further includes a first connection circuit electrically connecting the first ends of the first and second antenna radiators.
In order to solve the above technical problem, an embodiment of the present invention further provides a communication terminal, including the antenna apparatus described above.
Advantageous effects
The embodiment of the invention provides an antenna device and a communication terminal, wherein the antenna device comprises a first antenna radiator and a second antenna radiator which are adjacently arranged in a space position and have an electrical coupling relation, a first end of the first antenna radiator and a first end of the second antenna radiator are two spatially adjacent ends, and a second end of the first antenna radiator and a second end of the second antenna radiator are two spatially far ends; the feed points of the first antenna radiator and the second antenna radiator are respectively arranged at the adjacent first ends and the far second ends when being coupled feed type feed points or direct connection type feed points; or the first feed point of the first antenna radiator is a direct-connected feed point and is arranged at the second end; thereby making the working current of the first ends of the first and second antenna radiators minimum or maximum, the antenna device further comprising a first connection circuit electrically connecting the first ends of the first and second antenna radiators; thus, the first connecting circuit can introduce the second working current on the second antenna radiator into the first antenna radiator to at least partially offset the second coupling current coupled by the first antenna radiator from the second antenna radiator, and introduce the first working current on the first antenna radiator into the second antenna radiator to at least partially offset the first coupling current coupled by the second antenna radiator from the first antenna radiator, so that the interference of the coupling current between the adjacent first antenna radiator and the second antenna radiator on the antenna performance can be reduced or even eliminated, and the isolation between the first antenna radiator and the second antenna radiator is greatly improved; the distance between the adjacent first antenna radiating body and the second antenna radiating body is not limited any more, and the first antenna radiating body and the second antenna radiating body can be close to each other according to requirements, so that the design space of the antenna is saved, and various antenna layout requirements are better met; in addition, the working frequency band between the adjacent first antenna radiator and the second antenna radiator is not limited any more, the first antenna radiator and the second antenna radiator can work in the same frequency band to realize the design of the MIMO antenna, and can also work in different frequency bands according to requirements, so that the practicability is wider.
Additional features and corresponding advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic diagram of an arrangement structure of adjacent antennas in the related art;
fig. 2 is a schematic structural diagram of an antenna device according to an embodiment of the present invention;
fig. 3 is a first schematic electrical connection diagram of an antenna apparatus according to a first embodiment of the present invention;
fig. 4 is a second schematic electrical connection diagram of an antenna device according to a first embodiment of the present invention;
fig. 5 is a third schematic electrical connection diagram of an antenna device according to a first embodiment of the present invention;
fig. 6 is a first schematic view of a metal middle section provided in the second embodiment of the present invention;
fig. 7 is a second schematic diagram of a second metal middle section provided in the second embodiment of the present invention;
fig. 8 is a schematic diagram of a metal middle section provided in the second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The first embodiment is as follows:
in order to reduce interference caused by coupling current between adjacent antennas at a spatial position to the performance of the antennas and improve isolation between the adjacent antennas, the antenna device provided in this embodiment includes a first antenna radiator and a second antenna radiator that are adjacently disposed at the spatial position, and a first connection circuit that electrically connects the first antenna radiator and the second antenna radiator that are adjacent to each other; the first connecting circuit flows the second working current on the second antenna radiator into the first antenna radiator to at least partially cancel out the second coupling current coupled by the first antenna radiator from the second antenna radiator; the first working current on the first antenna radiator flows into the second antenna radiator so as to at least partially offset the first coupling current coupled from the first antenna radiator by the second antenna radiator, thereby reducing or even eliminating the interference of the coupling current between the adjacent first antenna radiator and the second antenna radiator on the antenna performance and improving the isolation between the first antenna radiator and the second antenna radiator; the distance between the antenna and the antenna is not limited, so that the antenna design space is saved, and various antenna layout requirements are better met; in addition, the working frequency ranges of the two are not limited any more, the two work in the same frequency range or different frequency ranges, and the practicability is wider.
For ease of understanding, the present embodiment will be described below in conjunction with the antenna device shown in fig. 2.
Referring to fig. 2, the antenna apparatus provided in this embodiment includes a first antenna radiator 1 and a second antenna radiator 2 that are adjacently disposed in a spatial position, and since the first antenna radiator 1 and the second antenna radiator 2 are adjacently disposed in the spatial position and there is electrical coupling therebetween during operation, the first antenna radiator 1 is coupled from the second antenna radiator 2 to a second coupling current, and the second coupling current flows into the first antenna radiator 1 from a first feeding point of the first antenna radiator, and the second coupling current reduces performance of the first antenna radiator 1; the second antenna radiator 2 is also coupled to the first coupling current from the first antenna radiator 1, and the first coupling current flows into the second antenna radiator 2 from the second feed point of the second antenna radiator 2; the first coupling current reduces the performance of the second antenna radiator 2.
In order to reduce or even eliminate the above-mentioned influence of the first and second coupling currents on the antenna performance. Referring to fig. 2, the antenna apparatus further includes a first connection circuit 3, the first connection circuit 3 electrically connects the first antenna radiator 1 and the second antenna radiator 2, a second operating current of the second antenna radiator 2 can flow into the first antenna radiator 1 through the first connection circuit 3 (i.e., the first connection circuit 3 can introduce the second operating current of the second antenna radiator 2 into the first antenna radiator 1), and a first operating current of the first antenna radiator 1 can flow into the second antenna radiator 2 through the first connection circuit (i.e., the first connection circuit 3 can introduce the first operating current of the first antenna radiator 2 into the second antenna radiator 2), wherein:
the flow direction of the second operating current introduced into the first antenna radiator 1 is opposite to the flow direction of the second coupling current coupled from the second antenna radiator 2 by the first antenna radiator 1, so that the second coupling current is partially or completely cancelled;
the flow direction of the first operating current introduced into the second antenna radiator 2 is opposite to the flow direction of the first coupling current coupled from the first antenna radiator 1 by the second antenna radiator 2, so that the first coupling current is partially or completely cancelled;
the first antenna radiator 1 and the second antenna radiator 2 are electrically connected through the first connecting circuit 3, the first antenna radiator 1 and the second antenna radiator 2 are mutually used as antenna branches of the opposite side, and the coupling current coupled from the opposite side is offset by the working current flowing into the opposite side, so that the coupling strength between the first antenna radiator 1 and the second antenna radiator is reduced to improve the isolation between the first antenna radiator and the second antenna radiator, and the overall performance of the first antenna radiator and the second antenna radiator is improved. The arrangement between the two antennas is not limited any more in spatial position, and the two antennas can be arranged in close proximity according to the antenna layout space requirement, so that the antenna design space is saved, the antennas can be arranged at a larger interval in a separated manner, various antenna layout requirements can be better met, and the antenna is particularly suitable for 5G communication terminals, such as 5G mobile phones and the like, which need to be provided with a plurality of antennas and adopt the MIMO antenna technology.
It should be understood that, in the embodiment, besides the direction of the second operating current introduced into the first antenna radiator 1 is opposite to the second coupling current, the magnitude of the second operating current introduced into the first antenna radiator 1 for canceling the second coupling current may be flexibly set according to the requirements of the actual application scenario. For example, the second operating current may be introduced to be equal to the first coupling current, or slightly larger than the first coupling current, or larger than the first coupling current, so as to cancel the first coupling current; the second working current introduced can also be set to be slightly smaller than the first coupling current or smaller than the first coupling current according to requirements so as to partially offset the first coupling current, as long as the residual first coupling current after offset meets the requirements of antenna performance. It is also understood that, in this embodiment, the direction of the first working current introduced into the second antenna radiator 2 is opposite to the first coupling current, and the magnitude of the first working current introduced into the second antenna radiator 2 to offset the first coupling current may be flexibly set according to the requirements of the actual application scenario. And will not be described in detail herein.
It should be understood that, in the present embodiment, the material, the antenna type, the shape and the size of the first antenna radiator 1 and the second antenna radiator 2 can be flexibly selected according to actual requirements. And at least one of the material, the antenna type, the shape and the size of the first antenna radiator 1 and the second antenna radiator 2 may be the same, or may be set to be different according to the requirement.
In this embodiment, according to actual requirements (for example, when the first antenna radiator 1 and the second antenna radiator 2 need to be set as MIMO antennas), the frequency band in which the first antenna radiator 1 operates is the same as the frequency band in which the second antenna radiator 2 operates, for example, the first antenna radiator 1 and the second antenna radiator 2 may both operate in a high frequency band, a medium frequency band, or a low frequency band.
Certainly, in other application scenarios, the frequency band in which the first antenna radiator 1 and the second antenna radiator 2 of the antenna device operate may also be different, for example, one of the frequency bands operates in a high frequency band or a medium frequency band, and the other frequency band operates in a low frequency band; it should be understood that the frequency bands here are different, and may be non-overlapping or partially overlapping, and in some examples, the frequency band in which the first antenna radiator 1 operates may also be in a frequency doubling relationship with the frequency band in which the second antenna radiator 2 operates. The method can be flexibly set according to actual requirements.
In one example of the present embodiment, the first antenna radiator 1 and the second antenna radiator 2 have adjacent two ends where the operating current is the minimum or the operating current is the maximum at a spatial position, and the first connection circuit 3 electrically connects the adjacent two ends of the first antenna radiator 1 and the second antenna radiator 2 so that the flow direction of the operating current introduced from the counterpart by the first antenna radiator 1 and the second antenna radiator 2 is opposite to the flow direction of the coupling current coupled from the counterpart to cancel the coupling current coupled from the counterpart. For ease of understanding, the present embodiment is described below in connection with several examples of arrangements of the feed point of the antenna radiator and the first connection circuit 3.
In one example, the first end of the first antenna radiator 1 and the first end of the second antenna radiator 2 are two ends that are spatially adjacent, and the second end of the first antenna radiator 1 and the second end of the second antenna radiator 2 are two ends that are spatially distant;
a first feed point of the first antenna radiator 1 and a second feed point of the second antenna radiator 2 are respectively arranged at a first end of the first antenna radiator 1 and a first end of the second antenna radiator 2, or respectively arranged at a second end of the first antenna radiator 1 and a second end of the second antenna radiator 2;
or the like, or, alternatively,
a first feed point of the first antenna radiator 1 is arranged at a second end of the first antenna radiator 1, a second feed point of the second antenna radiator 2 is arranged at a first end of the second antenna radiator 2, the second feed point is a coupling feed type feed point, and the first feed point is a direct connection type feed point;
in this example, the first connection circuit electrically connects the first ends of the first and second antenna radiators 1 and 2.
In addition, it should be understood that the structure of the first connection circuit 3 in the present embodiment may be any circuit structure that can achieve the above-mentioned purpose, and the present embodiment does not limit the structure thereof. In some application examples, in order to reduce the influence of the first connection circuit 3 itself on the antenna performance, the first connection circuit 3 may include a power storage unit connected in series between spatially adjacent first ends of the first and second antenna radiators 1 and 2, through which a first operating current on the first antenna radiator 1 is introduced to the second antenna radiator 2, and a second operating current on the second antenna radiator 2 is introduced to the first antenna radiator 2.
In this embodiment, the electrical parameters of the energy storage unit can be flexibly set according to the magnitudes of the first coupling current and the first working current, and/or the magnitudes of the second coupling current and the second working current. For example, the energy storage unit in this embodiment may include, but is not limited to, at least one of an inductance device and a capacitance device, and when the first feed point of the first antenna radiator 1 and the second feed point of the second antenna radiator 2 are respectively disposed at the second end of the first antenna radiator 1 and the second end of the second antenna radiator 2, or the first feed point of the first antenna radiator 1 is disposed at the second end of the first antenna radiator 1 and the second feed point of the second antenna radiator 2 is disposed at the first end of the second antenna radiator 2, the energy storage unit includes an inductance device; when the first feed point of the first antenna radiator and the second feed point of the second antenna radiator are respectively arranged at the first end of the first antenna radiator and the first end of the second antenna radiator, the energy storage unit comprises a capacitor device. For ease of understanding, the present embodiment will be described below with reference to two application examples shown in fig. 3 and fig. 4.
As shown in fig. 3, the right end 11 of the first antenna radiator 1 and the left end 21 of the second antenna radiator 2 are adjacent first ends. A first feed point, in this example a direct feed point, is arranged at the left end 12 (i.e. the second end) of the first antenna radiator 1 remote from its right end 11, and a second feed point, in this example a direct feed point, is arranged at the left end 22 (i.e. the second end) of the second antenna radiator 2 remote from its right end 21. The operating current at the right end 11 is the weakest for the first antenna radiator 1. For the second antenna radiator 2 the operating current at its left end 21 is the weakest. The first connection circuit 3, which connects the right end 11 of the first antenna radiator 1 and the left end 21 of the second antenna radiator 2, comprises an inductive element 31, i.e. the two are electrically connected by means of the inductive element 31. Of course, the inductance element 31 can be replaced by a capacitance element or other elements according to actual requirements, as long as the above requirements can be met.
As shown in fig. 4, the right end 11 of the first antenna radiator 1 and the left end 21 of the second antenna radiator 2 are adjacent to each other. A first feed point, in this example a direct feed point, is provided at the left end of the first antenna radiator 1 remote from its right end 11, and a form of coupled feed is used at the right end 21 of the second antenna radiator 2, i.e. the second feed point of the second antenna radiator 2 is a coupled feed point. The operating current at the right end 11 is the weakest for the first antenna radiator 1. For the second antenna radiator 2 the operating current at its left end 21 is the weakest. The two can also be electrically connected by the inductive element 31 in this example; of course, the inductance element 31 can be replaced by a capacitance element or other elements according to actual requirements, as long as the above requirements can be met.
As shown in fig. 5, the right end 11 of the first antenna radiator 1 and the left end 21 of the second antenna radiator 2 are adjacent to each other. A first feed point, in this example a direct feed point, is arranged at the right end 11 of the first antenna radiator 1 and a second feed point, in this example a direct feed point, is arranged at the right end 21 of the second antenna radiator 2. The operating current is strongest at the right end 11 of the first antenna radiator 1. The operating current is strongest at the left end 21 of the second antenna radiator 2. The first connection circuit 3 of the right end 11 of the first antenna radiator 1 and the left end 21 of the second antenna radiator 2 includes a capacitive element 32, that is, the capacitive element 32 electrically connects the two, at this time, the first coupling current flows to the second antenna radiator through the second feed point, and the introduced first working current flows from the capacitive element 32 to the second feed point, so that the first coupling current is cancelled; similarly, a second coupling current flows to the first antenna radiator through the first feed point, and a second working current is introduced to the first feed point from the capacitive element 32 to cancel the second coupling current. Of course, the capacitive element 32 can be replaced by an inductive element or other elements according to actual requirements, as long as the above requirements can be met.
It is to be understood that the above-described electrical connection relationship of a pair of spatially adjacent first and second antenna radiators 1 and 2 shown in fig. 3-5 is merely illustrative and not limited to the above-described examples. And it should be understood that the inductive element 31 and the capacitive element 32 may be replaced with other components or circuits having equivalent functions. In addition, the present embodiment is not limited to the above-described example in which the first antenna radiator 1 and the second antenna radiator 2 are electrically connected through the energy storage unit, and a resistor or another type of device may be used to electrically connect the two, as long as the above-described functions are satisfied.
And it should be understood that the number of pairs of antennas adjacent to each other in the spatial position included in the antenna apparatus in this embodiment is also not limited to the pair illustrated in the foregoing example, and the corresponding number may be flexibly set according to specific requirements. For example, in some application scenarios, the antenna apparatus further includes a third antenna radiator disposed adjacent to the second antenna radiator 2 in a spatial position, and the third antenna radiator and the second antenna radiator 2 may operate in the same frequency band or different frequency bands, and the distance between the third antenna radiator and the second antenna radiator 2 may be set to be large enough to improve the isolation between the third antenna radiator and the second antenna radiator; the isolation may also be performed by using the isolation method provided in this embodiment, in this case, the antenna apparatus may further include a second connection circuit that electrically connects the second antenna radiator 2 and the third antenna radiator; the second connection circuit introduces the second working current on the second antenna radiator 2 into the third antenna radiator and introduces the third working current on the third antenna radiator into the second antenna radiator 2;
the flow direction of the third working current introduced into the second antenna radiator 2 is opposite to the flow direction of the third coupling current coupled from the third antenna radiator by the second antenna radiator 2;
the flow direction of the second operating current introduced into the third antenna radiator is opposite to the flow direction of the second coupling current coupled from the second antenna radiator 2 by the third antenna radiator.
For example, the second end of the second antenna radiator 2 and the first end of the third antenna radiator are two ends that are spatially adjacent, and the first end of the second antenna radiator 2 and the second end of the third antenna radiator are two ends that are spatially distant; the second feed point of the second antenna radiator 2 and the third feed point of the third antenna radiator are respectively arranged at the second end of the second antenna radiator 2 and the first end of the third antenna radiator, or respectively arranged at the first end of the second antenna radiator 2 and the second end of the third antenna radiator; the second feed point and the third feed point are both coupled feed type feed points or direct connection type feed points;
or the like, or, alternatively,
a second feed point of the second antenna radiator 2 is arranged at the first end of the second antenna radiator 2, a third feed point of the third antenna radiator is arranged at the first end of the third antenna radiator, the third feed point is a coupling feed type feed point, and the second feed point is a direct connection type feed point;
the second connection circuit electrically connects the second end of the second antenna radiator and the first end of the third antenna radiator.
And it should be understood that the structure and arrangement rule of the second connection circuit may refer to, but not limited to, the first connection circuit in the above example. When the antenna device needs to further set a larger number of antennas according to the needs, the setting rule of the antenna device refers to the setting rule of the third antenna radiator, which is not described herein again.
Therefore, in the embodiment, the connection circuit connecting the adjacent antenna radiators which are adjacent in spatial position and have a coupling relationship is arranged between the two adjacent antenna radiators, so that the working currents on the two antenna radiators are mutually introduced into each other, the coupling currents coupled from each other are offset, the interference of the coupling currents between the adjacent antenna radiators on the antenna performance can be reduced or even eliminated, and the isolation between the two antenna radiators is improved; the distance between the antenna and the antenna is not limited, so that the antenna design space is saved, and various antenna layout requirements are better met; in addition, the two can work in the same frequency band or different frequency bands, and the practicability is wider.
Example two:
it should be understood that the antenna device provided by the present embodiment may be a separately manufactured component, and when the communication terminal is manufactured by using the antenna device, the antenna device may be assembled into or on the housing of the communication terminal. Of course, in some examples, in order to reduce the cost and improve the integration of the terminal, the antenna device provided in this embodiment may also be directly integrated on the housing of the communication terminal, or directly form the antenna radiator by using the housing of the communication terminal.
For example, in an application scenario example, the antenna apparatus includes a metal middle frame of the communication terminal, where the metal middle frame includes a metal frame, and the metal frame includes a first metal frame area and a second metal frame area that are spatially adjacent and separately disposed, where the first metal frame area may constitute the first antenna radiator 1, and the second metal frame area may constitute the second antenna radiator 2. In this embodiment, a first metal frame region and a second metal frame region that are adjacent to each other in spatial position and are separately disposed may be formed on the metal frame in an opening manner. For the open area, plastic or other insulating site filling may be employed, but is not limited to. In this embodiment, the metal middle frame may further include a large metal bottom plate disposed on the metal frame, and the large metal bottom plate may be electrically connected to the metal frame.
It should be understood that, in this embodiment, the specific distribution rule and the specific location of the first metal frame area and the second metal frame area on the metal frame may also be flexibly set. For example, the first metal frame region and the second metal frame region may be located on the same side of the metal frame, or may be located on two adjacent sides of the metal frame, or at least one of the first metal frame region and the second metal frame region may be distributed on two or three sides of the metal frame.
Accordingly, in this embodiment, when the antenna device includes at least one other antenna radiator in addition to the first antenna radiator 1 and the second antenna radiator 2, at least one of the at least one other antenna radiator may also be formed by, but not limited to, a metal frame. For example, when the antenna device further includes a third antenna radiator disposed adjacent to the second antenna radiator 2 in a spatial position, the metal bezel further includes a third metal bezel region disposed adjacent to the second metal bezel region in a spatial position, and the second metal bezel region is disposed separately in the third metal bezel region to constitute the third antenna radiator. And the specific distribution position of the third metal frame area on the metal frame can also be flexibly set by adopting the above example rule. For ease of understanding, the present embodiment is described below with reference to several specific examples of the distribution of antennas on the metal middle frame of the terminal.
Please refer to the metal middle frame of the terminal shown in fig. 6, wherein the middle part is a large metal bottom plate 66, and the side areas are metal frames 6; the metal frame is divided into three parts by the 2 openings, and the three parts are used as the radiation of the antenna to directly design the terminal antenna; from left to right are a first antenna radiator 61, a second antenna radiator 62 and a third antenna radiator 63, respectively, and from left to right are a first opening and a second opening, respectively, in sequence. Wherein the feeding position of the first antenna radiator 61 is designed at a position (i.e. the second end) far from the first opening, the feeding position of the second antenna radiator 62 is designed at a position (i.e. the second end) far from the first opening and near the second opening, and the feeding position of the third antenna radiator 63 is designed at a position (i.e. the first end) near the second opening.
The first antenna radiator 61, the second antenna radiator 62 and the third antenna radiator 63 can operate in the same frequency band to form a MIMO antenna, because these antennas are close to each other, and the isolation performance is very poor. The first antenna radiator 61 and the second antenna radiator are electrically connected to each other by an inductance element 64 at the position of the first opening, and the second antenna radiator 62 and the third antenna radiator 63 are connected to each other by a capacitance element 65 at the position of the second opening. The connection mode can be directly introduced to the PCB circuit board through the metal elastic sheet, and then the connection mode is respectively connected through the corresponding inductive element 63 and the capacitive element 64 on the circuit board.
It should be understood that the present embodiment has guiding significance for the layout design of the MIMO antenna, the type of the antenna unit, and the selection of the feeding manner, but the antenna of the present embodiment is not limited to be operated in the same frequency band, that is, when adjacent antenna radiators are not operated in the same frequency band, the present embodiment may also have an effect of improving the antenna performance. For example, adjacent antenna radiators may operate in similar frequency bands, and the isolation between the two may also be improved by using the method provided in this embodiment. Particularly, sometimes, adjacent antenna radiators do not work in the same frequency band, but the frequency doubling band of one of the antenna radiators is exactly within the working frequency band of the adjacent antenna radiator, and at this time, the problem of poor isolation may also exist between the antenna radiators. In summary, the method provided by this embodiment can improve the isolation between adjacent antennas, thereby improving the overall radiation performance of the antenna system.
Referring to fig. 6, in which the first antenna radiator 61 is similar to the IFA antenna structure, the current is the strongest at the feeding position and the current is the weakest at the end position (i.e., the position of the first opening) of the first antenna radiator 61; the second antenna radiator 62 is similar to a monopole antenna, which is the strongest current at the feed location (i.e., the location of the second opening) and the weakest current at the end of the second antenna radiator 62 (at the location of the first opening); when the current weakest points of the 2 MIMO antennas are connected by the inductance element 64, the isolation between the first antenna radiator 61 and the second antenna radiator 62 can be improved by adding an inductance with a proper inductance value.
The current is strongest at the feed of the third antenna radiator 63, where the strongest current positions of the second and third antenna radiators 62 and 63 are close to each other (at the position of the second opening), and the isolation between the second and third antenna radiators 62 and 63 can be improved by adding a capacitive element 65 with a small capacitance at the position of the second opening.
Please refer to fig. 7, which shows another metal middle frame of the terminal, wherein the middle part is a large metal bottom plate 76, and the edge areas are metal frames 7; the metal frame is divided into three parts by the 2 openings, and the three parts are used as the radiation of the antenna to directly design the terminal antenna; the first antenna radiator 71, the second antenna radiator 72 and the third antenna radiator 73 are respectively arranged from left to right, and the two openings from left to right are respectively a first opening and a second opening in sequence. The feeding position of the first antenna radiator 71 is designed to be away from the first opening (i.e., the second end), the feeding position of the second antenna radiator 72 is designed to be close to the first opening (i.e., the first end) and adopts a coupling feeding mode, the feeding branch of the second antenna radiator 72 is directly located at one side of the first opening, the second antenna radiator 72 is connected with the ground metal plate 76 of the middle frame at the second opening by a rib position, and the third antenna radiator 73 is designed to be an antenna of another frequency band (i.e., the third antenna radiator 73 does not form a MIMO antenna with the first antenna radiator 71 and the second antenna 72). Since the second antenna radiator 72 is fed in a coupled manner, that is, the current at the feeding position of the second antenna radiator 72 is the weakest, and the current at the end is the strongest, the first antenna radiator 71 and the second antenna radiator 72 are connected together by the inductance element 74 at the first opening, so that the decoupling can improve the isolation between the two. Of course, in this example, a corresponding connection circuit may also be disposed between the third antenna radiator 73 and the second antenna radiator 72 according to requirements to achieve the effect of decoupling and improving the isolation between the two, which is not described herein again.
Please refer to fig. 8, which shows another metal middle frame of the terminal, wherein the middle part is still a large metal bottom plate 86, and the side areas are metal frames 8; the metal frame is divided into four parts by the 3 openings, and the four parts can be directly used as the radiation of the antenna to design the terminal antenna and can also be partially used as the radiation of the antenna to directly design the terminal antenna; from right to left are a first antenna radiator 81, a second antenna radiator 82, a third antenna radiator 83 and a fourth antenna radiator 84, respectively. As can be seen from fig. 8, the first antenna radiator 81 and the second antenna radiator 82 are also distributed on the side (i.e. the long side) of the metal bezel 8, which can provide more antenna design space, and is particularly suitable for MIMO antenna design (for example, the MIMO antenna can be used for but not limited to design sub-6G, and MIMO antenna design in a small area can be achieved), which can save space, and meanwhile, multiple antennas in the same frequency band are disposed in a small area. The respective working frequency bands of the first antenna radiator 81, the second antenna radiator 82, the third antenna radiator 83 and the fourth antenna radiator 84, and whether corresponding connection circuits need to be arranged between adjacent antenna radiators can be flexibly set according to specific requirements, for example, the connection circuit 85 can be arranged between adjacent first ends of the first antenna radiator 81 and the second antenna radiator 82 to achieve the effect of decoupling and improving the isolation between the first antenna radiator 81 and the second antenna radiator 82. Whether a connection circuit is set and a specific setting mode may be flexibly determined between the second antenna radiator 82 and the third antenna radiator 83, and between the third antenna radiator 83 and the fourth antenna radiator 84 according to requirements, which is not described herein again.
The embodiment also provides a communication terminal, which can be various mobile communication terminals, such as a mobile phone, an IPAD, a notebook, and a mobile base station; various non-mobile communication terminals, such as a base station, a car terminal, a PC, etc., are also possible. The communication terminal comprises the antenna device shown in each embodiment, and by adopting the antenna device, the isolation between adjacent antennas in the communication terminal can be well improved, the antenna performance and the communication performance of the communication terminal are improved, and further the satisfaction degree of user experience is improved.
It will be apparent to those skilled in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software (which may be implemented in computer program code executable by a computing device), firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit.
In addition, communication media typically embodies computer readable instructions, data structures, computer program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to one of ordinary skill in the art. Thus, the present invention is not limited to any specific combination of hardware and software.
The foregoing is a more detailed description of embodiments of the present invention, and the present invention is not to be considered limited to such descriptions. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. An antenna arrangement, characterized in that the antenna arrangement comprises a first antenna radiator and a second antenna radiator which are spatially adjacent and in an electrically coupled relationship;
the first end of the first antenna radiator and the first end of the second antenna radiator are two spatially adjacent ends, and the second end of the first antenna radiator and the second end of the second antenna radiator are two spatially remote ends;
the first feed point of the first antenna radiator and the second feed point of the second antenna radiator are respectively arranged at the first end of the first antenna radiator and the first end of the second antenna radiator, or are respectively arranged at the second end of the first antenna radiator and the second end of the second antenna radiator; the first feed point and the second feed point are both coupling feed type feed points or direct connection type feed points;
or the like, or, alternatively,
a first feed point of the first antenna radiator is arranged at a second end of the first antenna radiator, a second feed point of the second antenna radiator is arranged at a first end of the second antenna radiator, the second feed point is a coupling feed type feed point, and the first feed point is a direct connection type feed point;
the antenna device further includes a first connection circuit electrically connecting the first ends of the first and second antenna radiators.
2. The antenna device as claimed in claim 1, wherein the frequency band in which said first antenna radiator operates is the same as or in a frequency doubling relationship with the frequency band in which said second antenna radiator operates.
3. The antenna device according to claim 2, wherein the first connection circuit comprises a power storage element connected in series between the first end of the first antenna radiator and the first end of the second antenna radiator, an electrical parameter of the power storage element being set according to a magnitude of a first coupling current of the second antenna radiator coupled from the first antenna radiator and a first operating current introduced through the first connection circuit, and/or a magnitude of a second coupling current of the first antenna radiator coupled from the second antenna radiator and a magnitude of a second operating current introduced through the first connection circuit, the second coupling current and the second operating current.
4. The antenna arrangement according to claim 3, wherein the energy storage unit comprises at least one of an inductive device and a capacitive device.
5. The antenna device of claim 4, wherein the energy storage unit comprises an inductive device when the first feed point of the first antenna radiator and the second feed point of the second antenna radiator are disposed at the second end of the first antenna radiator and the second end of the second antenna radiator, respectively, or the first feed point of the first antenna radiator is disposed at the second end of the first antenna radiator and the second feed point of the second antenna radiator is disposed at the first end of the second antenna radiator;
when the first feed point of the first antenna radiator and the second feed point of the second antenna radiator are respectively arranged at the first end of the first antenna radiator and the first end of the second antenna radiator, the energy storage unit comprises a capacitor device.
6. The antenna device of claim 5, wherein the antenna device comprises a metal middle frame of a communication terminal, the metal middle frame comprising a metal frame, the metal frame comprising a first metal frame region and a second metal frame region spatially adjacent and separately disposed, the first metal frame region constituting the first antenna radiator, and the second metal frame region constituting the second antenna radiator.
7. The antenna assembly of claim 6, wherein the antenna assembly further includes a third antenna radiator spatially disposed adjacent to the second antenna radiator, wherein the metal bezel further includes a third metal bezel region spatially disposed adjacent to the second metal bezel region, and wherein the third metal bezel region is disposed apart from the second metal bezel region to form the third antenna radiator.
8. The antenna assembly of claim 7, wherein the second end of the second antenna radiator and the first end of the third antenna radiator are two ends that are spatially adjacent, and wherein the first end of the second antenna radiator and the second end of the third antenna radiator are two ends that are spatially distant;
the second feed point of the second antenna radiator and the third feed point of the third antenna radiator are respectively arranged at the second end of the second antenna radiator and the first end of the third antenna radiator, or are respectively arranged at the first end of the second antenna radiator and the second end of the third antenna radiator; the second feed point and the third feed point are both coupling feed type feed points or direct connection type feed points;
or the like, or, alternatively,
a second feed point of the second antenna radiator is arranged at a first end of the second antenna radiator, a third feed point of the third antenna radiator is arranged at a first end of the third antenna radiator, the third feed point is a coupling feed type feed point, and the second feed point is a direct connection type feed point;
the antenna device further includes a second connection circuit electrically connecting the second end of the second antenna radiator and the first end of the third antenna radiator.
9. The antenna device of claim 8, wherein the first metal bezel region and the second metal bezel region are located on a same side of the metal bezel;
or the first metal frame area and the second metal frame area are respectively positioned at two adjacent sides of the metal frame.
10. A communication terminal, characterized in that it comprises an antenna device according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010215492.1A CN113451771A (en) | 2020-03-25 | 2020-03-25 | Antenna device and communication terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010215492.1A CN113451771A (en) | 2020-03-25 | 2020-03-25 | Antenna device and communication terminal |
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| Publication Number | Publication Date |
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| CN113451771A true CN113451771A (en) | 2021-09-28 |
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| CN202010215492.1A Pending CN113451771A (en) | 2020-03-25 | 2020-03-25 | Antenna device and communication terminal |
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| CN (1) | CN113451771A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115036678A (en) * | 2022-06-30 | 2022-09-09 | Oppo广东移动通信有限公司 | Electronic device and antenna setting method |
| WO2023284811A1 (en) * | 2021-07-16 | 2023-01-19 | 华为技术有限公司 | Antenna structure and electronic device |
-
2020
- 2020-03-25 CN CN202010215492.1A patent/CN113451771A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023284811A1 (en) * | 2021-07-16 | 2023-01-19 | 华为技术有限公司 | Antenna structure and electronic device |
| CN115036678A (en) * | 2022-06-30 | 2022-09-09 | Oppo广东移动通信有限公司 | Electronic device and antenna setting method |
| CN115036678B (en) * | 2022-06-30 | 2023-12-26 | Oppo广东移动通信有限公司 | Electronic device and antenna setting method |
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