CN111446540A - Electronic device - Google Patents
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- CN111446540A CN111446540A CN202010271093.7A CN202010271093A CN111446540A CN 111446540 A CN111446540 A CN 111446540A CN 202010271093 A CN202010271093 A CN 202010271093A CN 111446540 A CN111446540 A CN 111446540A
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- 230000005855 radiation Effects 0.000 claims abstract description 163
- 238000002955 isolation Methods 0.000 abstract description 38
- 230000005672 electromagnetic field Effects 0.000 abstract description 12
- 230000008878 coupling Effects 0.000 abstract description 11
- 238000010168 coupling process Methods 0.000 abstract description 11
- 238000005859 coupling reaction Methods 0.000 abstract description 11
- 238000004891 communication Methods 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 17
- SXHLTVKPNQVZGL-UHFFFAOYSA-N 1,2-dichloro-3-(3-chlorophenyl)benzene Chemical compound ClC1=CC=CC(C=2C(=C(Cl)C=CC=2)Cl)=C1 SXHLTVKPNQVZGL-UHFFFAOYSA-N 0.000 description 12
- 238000010295 mobile communication Methods 0.000 description 5
- HHXNVASVVVNNDG-UHFFFAOYSA-N 1,2,3,4,5-pentachloro-6-(2,3,6-trichlorophenyl)benzene Chemical compound ClC1=CC=C(Cl)C(C=2C(=C(Cl)C(Cl)=C(Cl)C=2Cl)Cl)=C1Cl HHXNVASVVVNNDG-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000007935 neutral effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003313 weakening effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—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
- H01Q21/00—Antenna arrays or systems
- H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
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Abstract
The application discloses electronic equipment relates to the technical field of communication. Because the antenna of the electronic device is additionally provided with the third radiation branch of which the extension direction is intersected with the extension direction of the second radiation branch, and the other end of the third radiation branch extends along the direction close to the fourth radiation branch, the direction of the generated coupling current on the third radiation branch is opposite to the direction of the current generated by the electromagnetic field of the adjacent antenna under the action of the electromagnetic field of the adjacent antenna, so that the energy of the adjacent antenna coupled by the antenna is weakened, the isolation between the antennas can be effectively improved on the premise of avoiding increasing the volume of the electronic device, and the communication performance of the electronic device is improved.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to an electronic device.
Background
At present, electronic devices, such as mobile phones, routers and client terminal devices, may have multiple antennas with the same operating frequency, thereby improving the communication quality of the electronic devices. However, when the plurality of antennas are close to each other, strong electromagnetic coupling generally occurs, so that the degree of isolation between the antennas is low, which affects the performance of the antennas.
In the related art, the electromagnetic coupling between the antennas can be avoided by increasing the physical distance between the antennas, but the increase of the physical distance between the antennas may result in an excessively large volume of the electronic device.
Disclosure of Invention
The application provides an electronic device, which can solve the problem that the electronic device in the related art is too large in size for avoiding electromagnetic coupling between antennas. The technical scheme is as follows:
the electronic device includes: an antenna, the antenna comprising: a first radiating branch, and a second, third and fourth radiating branches located on the same side of the first radiating branch;
one end of the second radiation branch is connected with the side arm of the first radiation branch, the other end of the second radiation branch is connected with one end of the third radiation branch, and the other end of the third radiation branch is connected with a ground terminal;
one end of the fourth radiation branch is connected with the side arm of the first radiation branch, and the other end of the fourth radiation branch is connected with the feed end;
wherein the extending direction of the second radiation branch and the extending direction of the fourth radiation branch both intersect with the extending direction of the first radiation branch and intersect with the extending direction of the third radiation branch, and the other end of the third radiation branch extends in a direction close to the fourth radiation branch.
Optionally, the extending direction of the third radiating branch is parallel to the extending direction of the first radiating branch.
Optionally, an extending direction of the second radiation branch is parallel to an extending direction of the fourth radiation branch and perpendicular to an extending direction of the third radiation branch.
Optionally, the electronic device further includes: a fifth radiating branch located on the same side of the first radiating branch as the third radiating branch;
one end of the fifth radiation branch is connected with the side arm of the first radiation branch, and the other end of the fifth radiation branch is connected with the grounding terminal.
Optionally, an extending direction of the fifth radiating branch is parallel to an extending direction of the second radiating branch.
Optionally, a distance between the fifth radiating branch and the second radiating branch is less than or equal to 6 mm.
Optionally, the first radiation branch comprises: the radiation device comprises a first radiation part and a second radiation part connected with the first radiation part;
one end of the first radiation part and one end of the fourth radiation branch are connected with a side arm of the first radiation part;
the sum of the impedances of the first, second, third and fourth radiating branches matches the impedance of the second radiating portion.
Optionally, each radiation branch in the electronic device is a plate-shaped structure, and a length of the second radiation branch is equal to a length of the fourth radiation branch.
Optionally, the mobile terminal further includes: a radio frequency signal source;
the radio frequency signal source is connected with the feed end and is used for providing radio frequency signals.
Optionally, the electronic device includes two of the antennas;
the two antennas are oppositely arranged, and the extending directions of the second radiation branches of the two antennas are overlapped.
The beneficial effect that technical scheme that this application provided brought includes at least:
the application provides an electronic equipment, because electronic equipment's antenna includes the crossing third radiation branch of extending direction and the extending direction of second radiation branch, and the other end of third radiation branch extends along the direction that is close to fourth radiation branch, consequently make the antenna under the effect of the electromagnetic field of adjacent antenna, the direction of the coupling current of production is on third radiation branch, the direction of the current that produces with the electromagnetic field of this adjacent antenna is opposite, thereby the energy of the adjacent antenna of this antenna coupling has been weakened, and then can be under the prerequisite of avoiding increasing electronic equipment's volume, effectively improve the isolation between the antenna, then improve electronic equipment's communication performance.
In addition, according to the electronic device provided by the embodiment of the application, a decoupling network, such as a neutral line or a T-shaped resonant structure, does not need to be additionally arranged, so that the space for arranging the decoupling network does not need to be additionally arranged, the increase of the volume of the electronic device can be avoided, and the miniaturization of the electronic device is facilitated.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an electronic apparatus in the related art;
FIG. 2 is a schematic illustration of the mutual coupling of two antennas shown in FIG. 1;
fig. 3 is a schematic diagram of a return loss curve and an isolation curve of an antenna in the related art;
fig. 4 is a schematic structural diagram of an electronic device provided in an embodiment of the present application;
fig. 5 is a schematic structural diagram of an antenna of an electronic device according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of another electronic device provided in an embodiment of the present application;
fig. 7 is a schematic structural diagram of another electronic device provided in the embodiment of the present application;
fig. 8 is a schematic diagram of a return loss curve and an isolation curve of an antenna according to an embodiment of the present application;
fig. 9 is a schematic structural diagram of another electronic device provided in the embodiment of the present application;
fig. 10 is a schematic diagram of a return loss curve and an isolation curve of another antenna provided in an embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of an electronic device in the related art. Referring to fig. 1, the electronic device may include: two antennas (i.e., antenna 101 and antenna 102), and a Printed Circuit Board (PCB) 200, both of which may be connected to PCB 200. The two antennas have the same operating frequency, that is, the wavelengths of the electromagnetic waves radiated by the two antennas are the same. The distance between the two antennas may be less than a quarter of the wavelength of the electromagnetic wave. Also, as can be seen from fig. 1, both antennas may be Inverted F Antennas (IFAs).
Fig. 2 is a schematic view of the mutual coupling of two antennas shown in fig. 1. As shown in fig. 2, the antenna 101 and the antenna 102 may both receive an electromagnetic wave a (which may be referred to as an incoming wave) in space, and may also be used as an excitation source to radiate an electromagnetic wave b (which may be referred to as a radiation wave) outwards. When the distance of the antenna 101 and the antenna 102 is close, i.e., the antenna 101 and the antenna 102 are located in the near field region of each other's electromagnetic field. When the antenna 101 is in operation, current generated by the electromagnetic field of the antenna 101 may enter the antenna 102 along the edge of the PCB 200, that is, the antenna 102 may couple stronger energy of the antenna 101, resulting in weaker energy that the antenna 101 finally radiates to the space. When the antenna 102 is in operation, current generated by the electromagnetic field of the antenna 102 may enter the antenna 101 along the edge of the PCB 200, i.e. the antenna 101 may couple stronger energy of the antenna 102, resulting in weaker energy of the antenna 102 ultimately radiated to the space.
That is, antenna 101 and antenna 102The current path on the PCB 200 for the current generated by the electromagnetic field of the other party is affected, i.e. a coupling effect is generated, which affects the performance of the antenna. Wherein, Z is shown in FIG. 2LIs the load impedance of the antenna.
The return loss (R L) of an antenna may reflect the performance of the antenna, and the isolation between antennas may reflect the coupling degree between antennas, where the return loss is the ratio of the power reflected by an rf input signal to the power of the input signal and is expressed in decibels (db), the isolation is the ratio of a signal transmitted by one antenna to a signal received by another antenna to the transmitted antenna signal and is also expressed in decibels.
Fig. 3 is a schematic diagram of a return loss curve and an isolation curve of an antenna in the related art. The abscissa in fig. 3 is frequency, the ordinate is return loss or isolation, the curve S1 in fig. 3 is a return loss curve of one of the two antennas in the related art, and the curve S2 is a return loss curve of the other antenna. The curve G1 is the isolation curve between the two antennas. Since the operating frequencies of the two antennas are the same, the return loss curve of antenna 101 and the return loss curve of antenna 102 approximately coincide. As can be seen from fig. 3, the isolation between the antennas 101 and 102 is-17 db when the operating frequency of the antennas 101 and 102 is 2.4 gigahertz (GHz). It can also be seen from fig. 3 that the lowest value of return loss for the two antennas is-15.5 db.
An embodiment of the present application provides an electronic device, which may include: at least one of a wireless-fidelity (Wi-Fi) module, a mobile communication module, and a narrowband Internet of things (NB-loT) module. Wherein each of the wi-fi module, the mobile communication module, and the NB-loT module may include an antenna.
Alternatively, the electronic device may be a smart phone, a tablet computer, a laptop portable computer, a desktop computer, a router, a Customer Premises Equipment (CPE), a television, a refrigerator, an air conditioner, or the like. The mobile communication module can be a generation (G) 5 th mobile communication module, i.e., a 5G mobile communication module. For example, referring to fig. 4, the electronic device 110 may be a television or a mobile phone.
If the electronic device 110 is a television, the antenna 1101 may be disposed at the top left corner, the bottom left corner, the top right corner, or the bottom right corner of the television, for example, referring to fig. 4, the antenna 1101 may be disposed at the bottom left corner of the television. If the electronic device 110 is a mobile phone, the antenna 1101 may be disposed at the upper left corner or the upper right corner of the mobile phone, for example, referring to fig. 4, the antenna 1101 may be disposed at the upper left corner or the upper right corner of the mobile phone, for example, the antenna 1101 may be disposed at the upper left corner.
The embodiment of the application provides electronic equipment. The electronic device may include: an antenna. Referring to fig. 5, the antenna may include: a first radiating branch 01, and a second radiating branch 02, a third radiating branch 03 and a fourth radiating branch 04 located on the same side of the first radiating branch 01.
One end of the second radiation branch 02 is connected to the side arm of the first radiation branch 01, the other end of the second radiation branch 02 is connected to one end of the third radiation branch 03, and the other end of the third radiation branch 03 is connected to a ground terminal (may also be referred to as a ground feeding point). One end of the fourth radiation branch 04 is connected to the side arm of the first radiation branch 01, and the other end of the fourth radiation branch 04 is connected to a feeding end (which may also be referred to as a signal feeding point).
The extending direction of the second radiation branch 02 and the extending direction of the fourth radiation branch 04 both intersect with the extending direction of the first radiation branch 01, and both intersect with the extending direction of the third radiation branch 03, and the other end of the third radiation branch 03 extends in a direction close to the fourth radiation branch 04. That is, the extending direction of the second radiation branch 02 and the extending direction of the fourth radiation branch 04 are not parallel to the extending direction of the first radiation branch 01, and are not parallel to the extending direction of the third radiation branch 03. The distance between one end of the third radiation branch 03 and the fourth radiation branch 04 is greater than the distance between the other end of the third radiation branch 03 and the fourth radiation branch 04.
To sum up, the embodiment of the present application provides an electronic device, because an antenna of the electronic device includes a third radiation branch whose extension direction is intersected with the extension direction of a second radiation branch, and the other end of the third radiation branch extends in a direction close to a fourth radiation branch, so that under the effect of an electromagnetic field of an adjacent antenna, a direction of a generated coupling current on the third radiation branch is opposite to a direction of a current generated by an electromagnetic field of the adjacent antenna, thereby weakening energy of the adjacent antenna coupled by the antenna, and further effectively improving isolation between the antennas on the premise of avoiding increasing the volume of the electronic device, and further improving communication performance of the electronic device.
In addition, according to the electronic device provided by the embodiment of the application, a decoupling network, such as a neutral line or a T-shaped resonant structure, does not need to be additionally arranged, so that the space for arranging the decoupling network does not need to be additionally arranged, the increase of the volume of the electronic device can be avoided, and the miniaturization of the electronic device is facilitated.
Alternatively, as shown in fig. 5, the extension direction of the third radiation branch 03 of each antenna may be parallel to the extension direction of the first radiation branch 01. The extension direction of the second radiation branch 02 of each antenna may be parallel to the extension direction of the fourth radiation branch 04 and perpendicular to the extension direction of the third radiation branch 03.
That is, the extending direction of the second radiation branch 02 of each antenna, and the extending direction of the fourth radiation branch 04, may be perpendicular to the extending direction of the first radiation branch 01.
In the embodiment of the present application, each radiation branch of the antenna of the electronic device may be a plate-shaped structure. When the second radiating branch 02 of the antenna is parallel to the fourth radiating branch 04, the length of the second radiating branch 02 may be equal to the length of the fourth radiating branch 04.
Fig. 6 is a schematic structural diagram of another electronic device provided in the embodiment of the present application. Referring to fig. 6, the electronic device may further include: a PCB 20. The PCB 20 is provided with a ground terminal 201 and a feed terminal 202. The number of the ground terminals 201 and the number of the feed terminals 202 may be equal to the number of antennas included in the electronic device. That is, the other end of the third radiation branch 03 of each antenna may be connected to a ground terminal 201 on the PCB 20, and the other end of the fourth radiation branch 04 of each antenna may be connected to a feeding terminal 202 on the PCB 20.
For example, assuming that the electronic device includes two antennas, two ground terminals 201 and two feed terminals 202 may be disposed on the PCB 20.
Alternatively, the PCB 20 may be made of a flame resistant material, which may be rated as FR-4.
In an embodiment of the present application, the electronic device may further include a radio frequency signal source, and the radio frequency signal source may be configured to provide a radio frequency signal. The rf signal source may be disposed on the PCB 20 and may be connected to a feeding terminal 202 disposed on the PCB 20. That is, the rf signal source can feed the rf signal into the antenna through the feeding terminal 202.
Optionally, the sum of the impedances of the first radiating branch 01, the second radiating branch 02, the third radiating branch 03 and the fourth radiating branch 04 (i.e. the input impedance of the antenna) is matched to the characteristic impedance of the transmission line connecting the rf signal source and the feeding end 202. The return loss minimum of the antenna can thus be made less than or equal to-10 db, and the smaller the return loss minimum, the better the performance of the antenna.
Wherein the characteristic impedance of the transmission line may be 50 ohms (Ω).
Referring to fig. 5, the first radiation branch 01 may include a first radiation portion 011, and a second radiation portion 012 connected to the first radiation portion 011. One end of the second radiation branch 02 and one end of the fourth radiation branch 04 may be connected to the side arm of the first radiation portion 011. That is, the first radiating portion 011 may refer to: the portion of the first radiation branch 01 situated between the second radiation branch 02 and the fourth radiation branch 04.
Optionally, the distance between the second radiation branch 02 and the fourth radiation branch 04 may be flexibly adjusted, and correspondingly, the length of the second radiation part 012 of the first radiation branch 01 may also be flexibly adjusted, so as to ensure that the lowest return loss value of the antenna may be less than or equal to-10 db.
In the embodiment of the present application, the electronic device may include multiple antennas, that is, the electronic device may communicate through multiple-input multiple-output (MIMO) technology. The operating frequencies of the antennas may be equal, for example, the operating frequencies of the antennas may be greater than or equal to 2.2GHz and less than or equal to 2.6 GHz.
Alternatively, the electronic device may comprise eight antennas, or six antennas, or, referring to fig. 7, the electronic device may comprise four antennas. Still alternatively, referring to fig. 6, the electronic device may include two antennas. Referring to fig. 6, the plurality of antennas may be arranged in an array, for example, the plurality of antennas may be symmetrically disposed on both sides of the PCB 20. Alternatively, referring to fig. 7, the plurality of antennas may be disposed on four sides of the PCB 20, and the extending directions of the first radiation branches 01 of the antennas of the adjacent two sides may intersect (e.g., be perpendicular).
The electronic device is schematically illustrated in the embodiment of the present application by taking an example in which the electronic device includes two antennas. As shown in fig. 6, the two antennas may be disposed opposite to each other, and the extending directions of the second radiation branches 02 of the two antennas may coincide. That is, the two antennas may be symmetrically disposed with a perpendicular bisector of a line connecting the two ground terminals 201 on the PCB 20 as an axis.
Fig. 8 is a schematic diagram of a return loss curve and an isolation curve of an antenna according to an embodiment of the present application. In the diagram, the abscissa is frequency and the ordinate is return loss or isolation. The curve S3 in fig. 8 is a return loss curve of one of the two antennas provided in the embodiment of the present application, the curve S4 is a return loss curve of the other of the two antennas, and the curve G2 is an isolation curve of the two antennas. Since the operating frequencies of the two antennas are the same, the two return loss curves S3 and S4 approximately coincide. As can be seen from comparing fig. 8 and fig. 3, on the premise that the distance between the two antennas is not changed, when the operating frequency of the two antennas of the electronic device provided in the embodiment of the present application is 2.4GHz, the isolation between the two antennas is-20.7 db, and compared with the isolation-17 db in the related art, the isolation between the antennas provided in the embodiment of the present application is improved to a certain extent. And, as can be seen from fig. 8, the lowest value of return loss of the two antennas provided by the embodiment of the present application is 22.75 db. Compared with the lowest return loss value of-15.5 db in the related art, the return loss of the antenna is also reduced, and the performance of the antenna is effectively improved.
Fig. 9 is a schematic structural diagram of another electronic device provided in an embodiment of the present application. Referring to fig. 9, the electronic device may further include: a fifth radiation branch 05. The fifth radiating branch 05 is located on the same side of the first radiating branch 01 as the third radiating branch 03. One end of the fifth radiating branch 05 may be connected to the side arm of the first radiating branch 01, and the other end may be connected to the ground terminal 201.
Alternatively, the extension direction of the fifth radiating branch 05 may be parallel to the extension direction of the second radiating branch 02. That is, the extending direction of the fifth radiation branch 05 and the extending direction of the first radiation branch 01 are not parallel.
Due to the fifth radiation branch 05, the current coupled to the antenna can flow to the ground terminal 201 through the fifth radiation branch 05, so that the energy radiated by the adjacent antenna coupled to the antenna is further weakened, and the isolation between the antennas is further improved.
In addition, since the directions of the currents in the first radiation branch 01 and the third radiation branch 03 on the antenna are opposite, the energy radiated to the adjacent antenna by the antenna can be reduced, and the isolation between the antennas can be further improved.
As can be seen in fig. 9, the fifth radiation branch 05 is located on the same side of the fourth radiation branch 04 as the second radiation branch 02. That is, the distance d1 between the fifth radiation branch 05 and the second radiation branch 02 may be smaller than the distance d2 between the fourth radiation branch 04 and the second radiation branch 02, i.e., d1 is [0, d2 ].
Since the distance d2 between the second radiation branch 02 and the fourth radiation branch 04 can be flexibly adjusted, accordingly, the maximum distance between the fifth radiation branch 05 and the second radiation branch 02 can be changed with the distance d2 between the second radiation branch 02 and the fourth radiation branch 04, and the maximum distance between the fifth radiation branch 05 and the second radiation branch 02 can be positively correlated with the distance between the second radiation branch 02 and the fourth radiation branch 04. That is, the greater the distance d2 between the second radiation branch 02 and the fourth radiation branch 04, the greater the maximum distance between the fifth radiation branch 05 and the second radiation branch 02.
In the embodiment of the present application, the isolation between the two antennas varies non-linearly with the distance between the fifth radiating branch 05 and the second radiating branch 02. Alternatively, if the distance d2 between the second radiation branch 02 and the fourth radiation branch 04 is slightly larger than 6mm, for example the distance between the second radiation branch 02 and the fourth radiation branch 04 is 6.1mm, the distance d1 between the fifth radiation branch 05 and the second radiation branch 02 may be less than or equal to 6 millimeters (mm). For example, the distance d1 between the fifth radiating branch 05 and the second radiating branch 02 may be 4 mm.
It should be noted that, if the distance d1 between the fifth radiation branch 05 and the second radiation branch 02 is not greater than the length of the third radiation branch 03, the other end of the fifth radiation branch 05 can be connected to the side arm of the third radiation branch 03, so as to achieve the connection with the ground terminal 201. If the distance d1 between the fifth radiating branch 05 and the second radiating branch 02 is greater than the length of the third radiating branch 03, the other end of the fifth radiating branch 05 can be directly connected to the ground terminal 201 on the PCB 20.
Fig. 10 is a schematic diagram of a return loss curve and an isolation curve of two antennas according to an embodiment of the present application. In fig. 10, the abscissa represents frequency, and the ordinate represents return loss or isolation. Because the working frequencies of the two antennas are the same, the return loss curves of the two antennas are approximately overlapped, and therefore, only one return loss curve is used for representing the return loss curves of the two antennas.
In the schematic diagram shown in fig. 10, the curve S5 is a return loss curve of the two antennas when d1 is 0, and G3 is an isolation curve of the two antennas when d1 is 0. The curve S6 is a return loss curve of two antennas when d1 is 3mm, and G4 is an isolation curve of the two antennas when d1 is 3 mm. The curve S7 is a return loss curve of the two antennas when d1 is 4mm, and G5 is an isolation curve of the two antennas when d1 is 4 mm. The curve S8 is a return loss curve of the two antennas when d1 is 5mm, and G6 is an isolation curve of the two antennas when d1 is 5 mm. The curve S9 is a return loss curve of the two antennas when d1 is 6mm, and the curve G7 is an isolation curve of the two antennas when d1 is 6 mm.
As can be seen from fig. 10, when d1 is 0, the lowest value of the return loss of the antenna is-15 db, and when the operating frequency of the antenna is 2.4GHz, the isolation between the two antennas is-26 db. The lowest value of return loss for the antenna is-24 db when d1 is 3mm, and the isolation between the two antennas is-25 db when the operating frequency of the antenna is 2.4 GHz. The lowest value of return loss for the antenna is-31.8 db when d1 is 4mm, and the isolation between the two antennas is-24.19 db when the operating frequency of the antenna is 2.4 GHz. The lowest value of return loss for the antenna is-18 db when d1 is 5mm, and the isolation between the two antennas is-25 db when the operating frequency of the antenna is 2.4 GHz. When d1 is 6mm, the isolation of the antenna is-25.85 db and the isolation is-10.8 db.
According to the above d1, when d1 is different values, it can be seen that, when d1 is 4mm, the return loss of the antenna is the lowest, i.e., the performance is the best, and the isolation between the antennas is improved by 8db compared with-17 db in the related art, i.e., the isolation between the antennas is effectively improved.
It should be noted that, as can be seen from comparing fig. 1 and fig. 4, the antenna provided in the embodiment of the present application is based on an inverted-F antenna, and the effect of improving the isolation between antennas is achieved by adding a radiation branch in the design space of the original antenna to change the current path. The improved mode can also be applied to other types of antennas, and the embodiment of the present application does not limit the type of the antenna.
To sum up, the embodiment of the present application provides an electronic device, because an antenna of the electronic device includes a third radiation branch whose extension direction is intersected with the extension direction of a second radiation branch, and the other end of the third radiation branch extends in a direction close to a fourth radiation branch, so that under the effect of an electromagnetic field of an adjacent antenna, a direction of a generated coupling current on the third radiation branch is opposite to a direction of a current generated by an electromagnetic field of the adjacent antenna, thereby weakening energy of the adjacent antenna coupled by the antenna, and further effectively improving isolation between the antennas on the premise of avoiding increasing the volume of the electronic device, and further improving communication performance of the electronic device.
In addition, according to the electronic device provided by the embodiment of the application, a decoupling network, such as a neutral line and a T-shaped resonant structure, does not need to be additionally arranged, so that the space for arranging the decoupling network does not need to be additionally arranged, the increase of the volume of the electronic device can be avoided, and the miniaturization of the electronic device is facilitated.
The above description is only exemplary of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements and the like that are made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. An electronic device, characterized in that the electronic device comprises: an antenna, the antenna comprising: a first radiating branch, and a second, third and fourth radiating branches located on the same side of the first radiating branch;
one end of the second radiation branch is connected with the side arm of the first radiation branch, the other end of the second radiation branch is connected with one end of the third radiation branch, and the other end of the third radiation branch is connected with a ground terminal;
one end of the fourth radiation branch is connected with the side arm of the first radiation branch, and the other end of the fourth radiation branch is connected with the feed end;
wherein the extending direction of the second radiation branch and the extending direction of the fourth radiation branch both intersect with the extending direction of the first radiation branch and intersect with the extending direction of the third radiation branch, and the other end of the third radiation branch extends in a direction close to the fourth radiation branch.
2. Electronic device according to claim 1, characterized in that the extension direction of the third radiating branch is parallel to the extension direction of the first radiating branch.
3. Electronic device according to claim 2, characterized in that the extension direction of the second radiation branch is parallel to the extension direction of the fourth radiation branch and perpendicular to the extension direction of the third radiation branch.
4. The electronic device of claim 1, further comprising: a fifth radiating branch located on the same side of the first radiating branch as the third radiating branch;
one end of the fifth radiation branch is connected with the side arm of the first radiation branch, and the other end of the fifth radiation branch is connected with the grounding terminal.
5. Electronic device according to claim 4, characterized in that the extension direction of the fifth radiating branch is parallel to the extension direction of the second radiating branch.
6. The electronic device of claim 5, wherein a distance between the fifth radiating branch and the second radiating branch is less than a distance between the fifth radiating branch and the second radiating branch.
7. The electronic device of claim 6, wherein a distance between the fifth radiating branch and the second radiating branch is less than or equal to 6 millimeters.
8. The electronic device according to any of claims 1 to 7, wherein each radiating branch in the electronic device is a plate-like structure, and the length of the second radiating branch is equal to the length of the fourth radiating branch.
9. The electronic device of any of claims 1-7, further comprising: a radio frequency signal source;
the radio frequency signal source is connected with the feed end and is used for providing radio frequency signals.
10. The electronic device of any of claims 1-7, wherein the electronic device comprises two of the antennas;
the two antennas are oppositely arranged, and the extending directions of the second radiation branches of the two antennas are overlapped.
Priority Applications (1)
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| CN113690588A (en) * | 2021-08-23 | 2021-11-23 | Oppo广东移动通信有限公司 | Antenna device, electronic apparatus, and method for designing antenna device |
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Address after: No. 17 Donghai West Road, Shinan District, Qingdao City, Shandong Province Patentee after: HISENSE Co.,Ltd. Country or region after: China Patentee after: Qingdao Hisense Mobile Communication Technology Co.,Ltd. Address before: Donghai West Road 266071 Shandong city of Qingdao province No. 17 Patentee before: HISENSE Co.,Ltd. Country or region before: China Patentee before: HISENSE MOBILE COMMUNICATIONS TECHNOLOGY Co.,Ltd. |