CN108736142B - Antenna and terminal - Google Patents
Antenna and terminal Download PDFInfo
- Publication number
- CN108736142B CN108736142B CN201710249446.1A CN201710249446A CN108736142B CN 108736142 B CN108736142 B CN 108736142B CN 201710249446 A CN201710249446 A CN 201710249446A CN 108736142 B CN108736142 B CN 108736142B
- Authority
- CN
- China
- Prior art keywords
- antenna
- section
- radiation
- feeding point
- radiating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
-
- 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
Landscapes
- Details Of Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The application discloses antenna and terminal belongs to antenna technical field. The antenna includes: a section of ribbon-shaped metal frame and a grounding plate of the terminal; the metal frame comprises a grounding section, a first radiation section and a second radiation section, wherein the first radiation section is positioned on one side of the grounding section; the grounding segment is connected with the grounding plate; the first radiating section is connected with a first feeding point, and a first gap exists between the first radiating section and the grounding plate; the second radiating section is connected with a second feeding point, and a second gap exists between the second radiating section and the grounding plate. The antenna provided by the application does not need to design a decoupling network to remove coupling among the antennas, so that the design of the antenna is simplified, and the size of the antenna is reduced.
Description
Technical Field
The present application relates to the field of antenna technologies, and in particular, to an antenna and a terminal.
Background
Currently, with the development of wireless communication technology, a terminal has a higher requirement on the throughput rate of communication information, and in order to improve the throughput rate of the terminal on the communication information, a larger number of antennas need to be arranged in the terminal. However, the increase in the number of antennas in the terminal tends to cause an increase in coupling between the antennas, which is a phenomenon in which signals between adjacent antennas affect each other.
In the related art, in order to remove coupling between antennas, a decoupling network may be designed for a feeding point of each antenna in a terminal.
In the process of implementing the present application, the inventor finds that the prior art has at least the following problems:
designing a decoupling network for the feed point of each antenna results in a complex antenna design and a large antenna size.
Disclosure of Invention
In order to solve the problems of complex antenna design and large antenna size in the prior art, the embodiment of the invention provides an antenna and a terminal. The technical scheme is as follows:
in a first aspect, an antenna is provided, which includes: the metal frame comprises a grounding section, a first radiation section and a second radiation section, the first radiation section is located on one side of the grounding section, the second radiation section is located on the other side of the grounding section, the grounding section is connected with the grounding plate, the first radiation section is connected with a first feed point, a first gap is formed between the first radiation section and the grounding plate, the second radiation section is connected with a second feed point, and a second gap is formed between the second radiation section and the grounding plate. In practical applications, when the first feeding point and the second feeding point in the antenna are fed simultaneously, the direction of the current on the first radiating section is opposite to the direction of the current on the second radiating section.
The embodiment of the invention provides an antenna comprising a section of metal frame of a terminal, wherein the metal frame comprises a first radiation section connected with a first feed point and a second radiation section connected with a second feed point.
In addition, when the antenna provided by the embodiment of the invention is fed at the first feeding point and the second feeding point simultaneously, the current directions on the first radiation section and the second radiation section are opposite, so that the radiation directions of electromagnetic waves on the first radiation section and the second radiation section are also opposite, and the radiation directions of the electromagnetic waves on the first radiation section and the second radiation section are opposite, so that the coupling between the first radiation section and the second radiation section is weakened or even eliminated.
In an embodiment of the present invention, a connection manner of the first radiation section and the first feeding point and a connection manner of the second radiation section and the second feeding point may be both connection by a feeder line, specifically:
in practical applications, the antenna further includes: a first feed line and a second feed line; the first radiating section is connected with the first feed point through the first feed line; the second radiating section is connected to the second feeding point through the second feeding line.
In one embodiment of the present invention, at least one side of the terminal is provided with a metal casing in a strip shape, and the metal frame is a part of the metal casing and is insulated from other parts of the metal casing.
In one embodiment of the present invention, the length of the metal bezel is 1/4 times to 1/2 times the wavelength of the electromagnetic wave radiated by the antenna. Optionally, in an embodiment of the present invention, a length of the metal frame is 3/8 times a wavelength of an electromagnetic wave radiated by the antenna.
In one embodiment of the invention, the width of the first gap is in the range of (0, 3] mm and the width of the second gap is in the range of (0, 3] mm optionally, in one embodiment of the invention, the width of the first gap is 1.5 mm and the width of the second gap is 1.5 mm.
In an embodiment of the invention, a first radiator may be further disposed in the first gap, and the first radiator and the first radiation segment may form a first radiation structure, and the first radiation structure may radiate an electromagnetic wave based on an electrical signal fed from the first feeding point. In practical applications, the first radiation structure may be a ring structure (Loop), an inverted F structure (IFA), a monopole structure (monopole), or the like, and specifically:
when the first radiating structure is an annular structure, the first radiator is respectively connected with the first radiating section and the first feed point.
When the first radiation structure is an inverted-F-shaped structure, the first radiation body is connected with the first radiation section.
And when the first radiation structure is a monopole structure, the first radiation body is connected with the first feed point.
Similarly, in an embodiment of the present invention, a second radiator may be disposed in the second gap, and the second radiator and the second radiation segment may form a second radiation structure, and the second radiation structure may radiate an electromagnetic wave based on an electrical signal fed from the second feeding point. In practical applications, the second radiation structure may also be a ring structure, an inverted F-shaped structure, or a monopole structure, and specifically:
in practical applications, the second radiator may be connected to the second radiation segment and the second feeding point, respectively, or the second radiator may be connected to the second radiation segment, or the second radiator may be connected to the second feeding point.
In a second aspect, an antenna is provided, which includes a strip-shaped metal frame in a terminal and a connecting structure; the metal frame comprises a connecting section, a first radiation section and a second radiation section, wherein the first radiation section is positioned on one side of the connecting section, and the second radiation section is positioned on the other side of the connecting section; the first radiating section is connected with a first feed point; the second radiating section is connected with a second feeding point; the connection structure is connected to the first feeding point, the second feeding point and the connection section, respectively. In practical applications, when the first feeding point and the second feeding point are fed simultaneously, the direction of the current on the first radiating section is opposite to the direction of the current on the second radiating section.
The embodiment of the invention provides an antenna comprising a section of metal frame of a terminal, wherein the metal frame comprises a first radiation section connected with a first feed point and a second radiation section connected with a second feed point.
In addition, when the antenna provided by the embodiment of the invention is fed at the first feeding point and the second feeding point simultaneously, the current directions on the first radiation section and the second radiation section are opposite, so that the radiation directions of electromagnetic waves on the first radiation section and the second radiation section are also opposite, and the radiation directions of the electromagnetic waves on the first radiation section and the second radiation section are opposite, so that the coupling between the first radiation section and the second radiation section is weakened or even eliminated.
In an embodiment of the present invention, a connection manner of the first radiation section and the first feeding point and a connection manner of the second radiation section and the second feeding point may be both connection by a feeder line, specifically:
in practical applications, the antenna further includes: a first feed line and a second feed line; the first radiating section is connected with the first feed point through the first feed line; the second radiating section is connected to the second feeding point through the second feeding line.
In one embodiment of the present invention, at least one side of the terminal is provided with a metal casing in a strip shape, and the metal frame is a part of the metal casing and is insulated from other parts of the metal casing.
In one embodiment of the present invention, the length of the metal bezel is 1/4 times to 1/2 times the wavelength of the electromagnetic wave radiated by the antenna. Optionally, in an embodiment of the present invention, a length of the metal frame is 3/8 times a wavelength of an electromagnetic wave radiated by the antenna.
In a third aspect, a terminal is provided, where the terminal includes at least one antenna according to any implementation manner of the first aspect, or the terminal includes at least one antenna according to any implementation manner of the second aspect.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
the antenna provided by the embodiment of the invention comprises a strip-shaped metal frame of a terminal, the metal frame comprises a first radiation section connected with a first feeding point and a second radiation section connected with a second feeding point, the first radiation section and the second radiation section can radiate electromagnetic waves based on electric signals fed by the first feeding point and the second feeding point respectively, when the first feeding point and the second feeding point are fed simultaneously, the current directions on the first radiation section and the second radiation section are opposite, and when the first feeding point and the second feeding point are fed simultaneously, the radiation directions of the electromagnetic waves on the first radiation section and the second radiation section are opposite, so that the coupling between the first radiation section and the second radiation section is weakened or even eliminated, therefore, the first radiation section and the second radiation section of the antenna provided by the embodiment of the invention respectively realize the communication function of the traditional antenna, and a decoupling network does not need to be designed for the first radiation section and the second radiation section respectively, so that the design of the antenna is simplified, and the size of the antenna is reduced.
Drawings
Fig. 1A is a schematic structural diagram of an antenna according to an embodiment of the present invention.
Fig. 1B is a schematic view of a metal frame according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of return loss and isolation of an antenna provided by an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an antenna according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of an antenna according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of an antenna according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of return loss and isolation of an antenna provided by an embodiment of the present invention.
Fig. 7 is a schematic structural diagram of an antenna according to an embodiment of the present invention.
Fig. 8 is a schematic diagram of return loss and isolation of an antenna provided by an embodiment of the present invention.
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.
Currently, Multiple-Input Multiple-Output (MIMO) technology has become one of the core technologies in the field of wireless communication. In practical applications, a MIMO communication system generally includes a plurality of antennas, and the throughput of the MIMO communication system to communication information is higher as the number of antennas is larger. In practical applications, a coupling phenomenon may occur between antennas in the MIMO communication system, that is, a phenomenon that signals may affect each other between the antennas may occur, which may seriously affect the communication quality of the MIMO communication system. Since the coupling between antennas is more severe as the number of antennas in the MIMO communication system is larger, and the coupling between antennas restricts the number of antennas in the MIMO communication system, removing the coupling between antennas is key to increasing the number of antennas in the MIMO communication system and improving the throughput of the MIMO communication system to communication information.
In the related art, an antenna in a MIMO communication system may include a radiator connected to a feed point and grounded, a feed point, and a decoupling network connected to the feed point for removing coupling between the antenna and other antennas adjacent to the antenna. In practical applications, the addition of a decoupling network may result in a complex antenna design and may result in a large antenna size.
Fig. 1A is a schematic structural diagram of an antenna according to an exemplary embodiment of the present invention, and as shown in fig. 1A, the antenna may include: a metal frame 10 in the form of a strip of a terminal and a ground plane 11, wherein the metal frame comprises a ground section 101, a first radiating section 102 on one side of the ground section 101 and a second radiating section 103 on the other side of the ground section 101.
As shown in fig. 1A, the ground segment 101 is connected to the ground plate 11. The first radiating segment 102 is connected to the first feeding point P1, and a first gap T1 exists between the first radiating segment 102 and the ground plate 11. The second radiating segment 103 is connected to the second feeding point P2, and a second gap T2 exists between the second radiating segment 103 and the ground plate 11.
In practical applications, the ground plate 11 may be a metal back cover of a terminal or a circuit board, and the embodiment of the present invention is not limited thereto. When the ground plate 11 is a terminated circuit board, the first feeding point P1 and the second feeding point P2 may be disposed on the ground plate 11, or may be disposed on the first gap T1 or the second gap T2, which is not limited in the embodiment of the present invention. The first gap T1 and the second gap T2 may be made of an insulating material such as a dielectric material or air, and are used to ensure that the first radiation section 102 and the second radiation section 103 are insulated from the ground plate 11, and in an embodiment of the present invention, the first gap T1 and the second gap T2 may be dielectric substrates of terminals.
In addition, in practical applications, since the antenna, the GPS device, the bluetooth device, and the like of the terminal are generally disposed in the upper and lower ends of the terminal, an available space in the upper and lower ends of the terminal is small, which results in a difficulty in disposing more antennas in the upper and lower ends of the terminal. In consideration of the situation that the available space at the upper end and the lower end of the terminal is small, the antenna can be arranged on the left side and the right side of the terminal so as to reduce the deployment difficulty of the antenna. Referring to fig. 1B, at least one side edge (only the right side edge is taken as an example in fig. 1B) of the terminal may be provided with a strip-shaped metal shell Z, the metal shell Z may form a ring-shaped structure with a gap, the metal frame 10 may be a portion of the metal shell and is insulated from other portions of the metal shell, for example, as shown in fig. 1B, a gap J may exist between the metal frame 10 and other portions of the metal shell. It should be noted that, although fig. 1B only shows a case where one metal frame 10 is disposed in the metal shell Z of the terminal, in practical applications, a plurality of metal frames 10 may be disposed in the terminal, and correspondingly, a plurality of antennas as shown in fig. 1A may be disposed in the terminal.
As shown in fig. 1A, when the first feeding point P1 feeds, a current may be generated on the metal bezel 10 and transmitted away from the first radiating section 102, i.e., in the direction m in fig. 1A. A capacitor and an inductor may be formed between the first radiation segment 102 and the ground plate 11, and the capacitor and the inductor may excite an electromagnetic oscillation (also called resonance) in the first gap T1 between the first radiation segment 102 and the ground plate 11, so that the first radiation segment 102 radiates an electromagnetic wave, which is equivalent to implementing a radiation function of a conventional antenna.
Similarly, as shown in fig. 1A, when the second feeding point P2 feeds, a current may be generated on the metal bezel 10 and transmitted in a direction away from the second radiating section 103, such as an n direction in fig. 1A, where the n direction is opposite to the m direction. The capacitance and inductance formed between the second radiation section 103 and the ground plate 11 can excite electromagnetic oscillation in the second gap T2 between the second radiation section 103 and the ground plate 11, so that the second radiation section 103 radiates electromagnetic waves, which is equivalent to implementing the radiation function of a conventional antenna.
As can be seen from the above description, the antenna provided by the embodiment of the present invention can implement the radiation functions of two conventional antennas by feeding through the first feeding point P1 and the second feeding point P2, and therefore, the antenna provided by the embodiment of the present invention is actually equivalent to an antenna array.
In practical applications, the magnitude of the m-direction current and the magnitude of the n-direction current are not equal everywhere on the metal bezel 10, and actually, the m-direction current is larger closer to the first radiation section 102 when the first feeding point P1 feeds power, and the n-direction current is larger closer to the second radiation section 103 when the second feeding point P2 feeds power. Therefore, when the first feeding point P1 and the second feeding point P2 are fed simultaneously, although the m-direction current and the n-direction current may exist on the metal bezel 10 at the same time, the m-direction current on the first radiation segment 102 of the metal bezel 10 is much larger than the n-direction current, and the m-direction current on the first radiation segment 102 can cancel the n-direction current, and after the corresponding current is cancelled, the current direction on the first radiation segment 102 will be m-direction, and similarly, when the first feeding point P1 and the second feeding point P2 are fed simultaneously, the current direction on the second radiation segment 103 will be n-direction.
As can be seen from the above description, when the first feeding point P1 and the second feeding point P2 are fed simultaneously, the direction of the current in the first radiation section 102 is opposite to the direction of the current in the second radiation section 103, the radiation directions of the electromagnetic waves in the first radiation section 102 and the second radiation section 103 are also opposite due to the opposite directions of the currents, and the mutual influence between the electromagnetic waves radiated in the first radiation section 102 and the second radiation section 103 is small due to the opposite directions of the electromagnetic waves, so that the first radiation section 102 and the second radiation section 103 are decoupled.
Therefore, the antenna provided by the embodiment of the invention does not need to be decoupled by arranging a decoupling network, so that the structure of the antenna is simplified, and the size of the antenna is reduced. In an embodiment of the present invention, the length of the metal bezel 10 may be 1/4 times to 1/2 times the wavelength of the electromagnetic wave radiated by the antenna, and optionally, in another embodiment of the present invention, the length of the metal bezel 10 may be 3/8 times the wavelength of the electromagnetic wave radiated by the antenna, where the antenna is the antenna shown in fig. 1A. In addition, as the size of the antenna is reduced, the size of the clearance required for the antenna (i.e., the first gap T1 and the second gap T2) is also reduced, and in one embodiment of the present invention, the width of the first gap T1 may be in the range of (0, 3) mm, and the width of the second gap T2 may be in the range of (0, 3) mm, wherein "(" for open interval and "]" for closed interval, and optionally, in another embodiment of the present invention, the width of the first gap T1 may be 1.5 mm, and the width of the second gap T2 may be 1.5 mm.
Fig. 2 is a schematic diagram showing the return loss of the first radiation section 102 (curve a), the return loss of the second radiation section 103 (curve b), and the isolation between the first radiation section 102 and the second radiation section 103 (curve c), wherein the x-axis in fig. 2 represents the frequency of the electromagnetic wave in gigahertz (GHz) and the y-axis represents the loss of the electromagnetic wave in decibels (db). As can be seen from the curve a in fig. 2, when the frequency of the electromagnetic wave is in the interval from 3.4GHz to 3.6GHz, the return loss of the first radiation section 102 is in the interval from-18 db to-16 db, and the return loss performance is better. As can be seen from the curve b in fig. 2, when the frequency of the electromagnetic wave is in the range from 3.4GHz to 3.6GHz, the return loss of the second radiation section 102 is in the range from-18 db to-16 db, and the return loss performance is better. As can be seen from the curve c in fig. 2, when the frequency of the electromagnetic wave is in the range of 3.4GHz to 3.6GHz, the isolation between the first radiation section 102 and the second radiation section 103 is about-13 db, and therefore, the isolation between the first radiation section 102 and the second radiation section 103 is better.
In summary, the antenna provided in the embodiments of the present invention includes a strip-shaped metal frame of a terminal, the metal frame includes a first radiation section connected to a first feeding point and a second radiation section connected to a second feeding point, and the first radiation section and the second radiation section can radiate electromagnetic waves based on electrical signals fed from the first feeding point and the second feeding point, respectively, and when the first feeding point and the second feeding point are fed simultaneously, current directions on the first radiation section and the second radiation section are opposite, and when the first feeding point and the second feeding point are fed simultaneously, radiation directions of electromagnetic waves on the first radiation section and the second radiation section are opposite, so that coupling between the first radiation section and the second radiation section is reduced or even eliminated, and therefore, the first radiation section and the second radiation section of the antenna provided in the embodiments of the present invention respectively implement a communication function of a conventional antenna, and a decoupling network does not need to be designed for the first radiation section and the second radiation section respectively, so that the design of the antenna is simplified, and the size of the antenna is reduced.
In practical applications, the connection manner of the first radiating segment 102 and the first feeding point P1 and the connection manner of the second radiating segment 103 and the second feeding point P2 may be feeder line connections. Specifically, with continued reference to fig. 1A, as shown in fig. 1A, the antenna may include a first feed line q1 and a second feed line q 2. The first radiation segment 102 may be connected to the first feeding point P1 through a first feeding line q1, and the second radiation segment 103 may be connected to the second feeding point P2 through a second feeding line q 2. Of course, in practical applications, the connection manner between the first radiating segment 102 and the first feeding point P1 and the connection manner between the second radiating segment 103 and the second feeding point P2 may have other forms, which is not specifically limited in the embodiment of the present invention.
In practical applications, a first radiator may be disposed in the first gap T1, and the first radiator and the first radiating segment 102 may form a first radiating structure, and the first radiating structure may radiate an electromagnetic wave based on an electrical signal fed from the first feeding point P1. In some embodiments of the present invention, the first radiation structure may be a ring structure (Loop), an inverted F structure (IFA), a monopole structure (monopole), and the like, and the embodiments of the present invention are described in the following three cases:
in a first case, the first radiating structure may be a ring structure, referring to fig. 3, in this case, the first radiator disposed in the first gap T1 may be a radiator W1, and the radiator W1 may be connected to the first radiating segment 102 and the first feeding point P1, respectively, as shown in fig. 3, the radiator W1 and the first radiating segment 102 form a ring structure.
In a second case, the first radiating structure may be an inverted F-shaped structure, referring to fig. 4, in which case the first radiator disposed in the first gap T1 may be a radiator W2, and the radiator W2 may be connected to the first radiating segment 102.
In a third case, the first radiating structure may be a monopole structure, in which case, referring to fig. 5, the first radiator disposed in the first gap T1 may be a radiator W3, and the radiator W3 may be connected to the first feeding point P1.
Similarly, a second radiator may be disposed in the second gap T2, and the second radiator may form a second radiation structure together with the second radiation segment 103, and the second radiation structure may also be a ring structure, an inverted F-shaped structure, a monopole structure, or the like, specifically:
the second radiator may be connected to the second radiation segment 103 and the second feeding point P2, respectively, or the second radiator may be connected to the second radiation segment 103, or the second radiator may be connected to the second feeding point P2.
It should be noted that, in the antenna provided in the embodiment of the present invention, the shape of the second radiation structure may be the same as or different from that of the first radiation structure, and this is not specifically limited in the embodiment of the present invention.
Fig. 6 is a schematic diagram showing the return loss of the first radiation structure in a ring shape (curve d), the return loss of the second radiation structure in an inverted F shape (curve e), and the isolation between the first radiation structure and the second radiation structure (curve F), where the x-axis in fig. 6 represents the frequency of electromagnetic waves in GHz and the y-axis represents the loss of electromagnetic waves in db. As can be seen from the curve d in fig. 6, when the frequency of the electromagnetic wave is in the range from 3.4GHz to 3.6GHz, the return loss of the first radiation structure of the annular structure is in the range from-19 db to-12 db, and the return loss performance is better. As can be seen from a curve e in fig. 6, when the frequency of the electromagnetic wave is in the range from 3.4GHz to 3.6GHz, the return loss of the second radiation structure of the inverted F-shaped structure is in the range from-16 db to-11 db, and the return loss performance is better. As can be seen from a curve F in fig. 6, when the frequency of the electromagnetic wave is in the range from 3.4GHz to 3.6GHz, the isolation between the first radiation structure of the annular structure and the second radiation structure of the inverted F-shaped structure is about-11 db, and therefore, the isolation between the first radiation structure and the second radiation structure is better.
Fig. 7 is a schematic structural diagram of another antenna according to an exemplary embodiment of the present invention, and as shown in fig. 7, the antenna may include: a length of metal rim 70 in the form of a strip in the terminal and a connecting structure 71. The metal frame 70 includes a connecting section 701, a first radiating section 702 located at one side of the connecting section 701, and a second radiating section 703 located at the other side of the connecting section 701.
As shown in fig. 7, the first radiating section 702 is connected to a first feeding point K1. The second radiating segment 703 is connected to a second feeding point K2. The connection structure 71 is connected to the first feeding point K1, the second feeding point K2, and the connection segment 701, respectively.
Similar to the antenna provided in fig. 1A, the antenna provided in fig. 7 may also be disposed on the left and right sides of the terminal, so as to reduce the difficulty of antenna deployment. The specific deployment manner is the same as the deployment manner shown in fig. 1B, and the embodiment of the present invention is not described herein again.
As shown in fig. 7, when the first feeding point K1 feeds, a current may be generated on the metal frame 70 in a direction away from the first radiating section 702, that is, in a u direction in fig. 7, and the first radiating section 702 may radiate an electromagnetic wave based on the current in the u direction, which is equivalent to implementing a radiating function of a conventional antenna.
Similarly, as shown in fig. 7, when the second feeding point K2 feeds, a current in a direction away from the second radiation segment 703, that is, a v direction in fig. 7, may be generated on the metal frame 70, where the v direction is opposite to the u direction, and the second radiation segment 703 may radiate an electromagnetic wave based on the current in the v direction.
As can be seen from the above description, the antenna provided by the embodiment of the present invention can implement the radiation function of two antenna assemblies by feeding through the first feeding point K1 and the second feeding point K2, which is equivalent to implementing the radiation function of a conventional antenna.
In practical applications, the magnitude of the u-direction current and the magnitude of the v-direction current are not equal everywhere on the metal frame 70, and similarly to the antenna shown in fig. 1A, the u-direction current is larger closer to the first radiation section 702 when the first feeding point K1 feeds power, and the v-direction current is larger closer to the second radiation section 703 when the second feeding point K2 feeds power. Therefore, when the first feeding point K1 and the second feeding point K2 are fed simultaneously, the current direction on the first radiating segment 702 will be the u direction and the current direction on the second radiating segment 703 will be the v direction.
As can be seen from the above description, when the first feeding point K1 and the second feeding point K2 are fed simultaneously, the direction of the current in the first radiation segment 702 is opposite to the direction of the current in the second radiation segment 703, so that the radiation directions of the electromagnetic waves in the first radiation segment 702 and the second radiation segment 703 are also opposite, and therefore the mutual influence between the electromagnetic waves radiated in the first radiation segment 702 and the second radiation segment 703 is small, so that the decoupling of the first radiation segment 702 and the second radiation segment 703 is realized.
Therefore, the antenna provided by the embodiment of the invention does not need to be decoupled by arranging a decoupling network, so that the structure of the antenna is simplified, and the size of the antenna is reduced. In an embodiment of the present invention, the length of the metal frame 70 may be 1/4 times to 1/2 times the wavelength of the electromagnetic wave radiated by the antenna, and optionally, in another embodiment of the present invention, the length of the metal frame 70 may be 3/8 times the wavelength of the electromagnetic wave radiated by the antenna, where the antenna is the antenna shown in fig. 7. In addition, as the size of the antenna decreases, the size of the headroom required for the antenna decreases accordingly, which may be (0, 3] mm in one embodiment of the present invention, and optionally 1.5 mm in another embodiment of the present invention.
In practical applications, the connection manner of the first radiating segment 702 and the first feeding point K1 and the connection manner of the second radiating segment 703 and the second feeding point K2 may be feeder line connections. In particular, with continued reference to fig. 7, as shown in fig. 7, the antenna may include a first feed line g1 and a second feed line g 2. The first radiation segment 702 may be connected to a first feeding point K1 through a first feeding line g1, and the second radiation segment 703 may be connected to a second feeding point K2 through a second feeding line g 2. Of course, in practical applications, the connection mode between the first radiation segment 702 and the first feeding point K1 and the connection mode between the second radiation segment 703 and the second feeding point K2 may have other forms, which is not specifically limited in the embodiment of the present invention.
Fig. 8 is a schematic diagram showing the return loss (curve g) of the first radiation segment 702, the return loss (curve h) of the second radiation segment 703 and the isolation (curve i) between the first radiation segment 702 and the second radiation segment 703, where in fig. 8, the x-axis represents the frequency of the electromagnetic wave in GHz and the y-axis represents the loss of the electromagnetic wave in db. As can be seen from the curve g in fig. 8, when the frequency of the electromagnetic wave is in the range from 3.4GHz to 3.6GHz, the return loss of the first radiating section 702 is in the range from-18 db to-11 db, and the return loss performance is better. As can be seen from the curve h in fig. 8, when the frequency of the electromagnetic wave is in the range from 3.4GHz to 3.6GHz, the return loss of the second radiation section 703 is in the range from-12 db to-10 db, and the return loss performance is better. As can be seen from a curve i in fig. 8, when the frequency of the electromagnetic wave is in the range from 3.4GHz to 3.6GHz, the isolation between the first radiation section 702 and the second radiation section 703 is about-11 db, and therefore, the isolation between the first radiation section 702 and the second radiation section 703 is better.
In summary, the antenna provided in the embodiments of the present invention includes a strip-shaped metal frame of a terminal, the metal frame includes a first radiation section connected to a first feeding point and a second radiation section connected to a second feeding point, and the first radiation section and the second radiation section can radiate electromagnetic waves based on electrical signals fed from the first feeding point and the second feeding point, respectively, and when the first feeding point and the second feeding point are fed simultaneously, current directions on the first radiation section and the second radiation section are opposite, and when the first feeding point and the second feeding point are fed simultaneously, radiation directions of electromagnetic waves on the first radiation section and the second radiation section are opposite, so that coupling between the first radiation section and the second radiation section is reduced or even eliminated, and therefore, the first radiation section and the second radiation section of the antenna provided in the embodiments of the present invention respectively implement a communication function of a conventional antenna, and a decoupling network does not need to be designed for the first radiation section and the second radiation section respectively, so that the design of the antenna is simplified, and the size of the antenna is reduced.
The embodiment of the invention also provides a terminal, wherein the terminal is provided with at least one antenna shown in fig. 1A, fig. 3, fig. 4, fig. 5 or fig. 7, and the terminal can transmit and receive communication information by using the antenna.
In practical applications, a terminal may separately set one or more antennas shown in fig. 1A, fig. 3, fig. 4, fig. 5, or fig. 7, or may mix one or more antennas shown in fig. 1A, fig. 3, fig. 4, fig. 5, or fig. 7, which is not limited in this embodiment of the present invention.
It should be noted that the terminal provided in the embodiment of the present invention may be an electronic device capable of sending and receiving communication information, such as a mobile phone, a tablet computer, and the like. Embodiments of the present invention provide a terminal that may include a processing component, a memory, a power component, a multimedia component, an audio component, an input/output interface, a sensor component, and a communication component.
Wherein the processing component is used to control overall operation of the terminal, such as operations associated with display, telephone calls, data communications, camera operations and recording operations. In one embodiment of the invention, the processing component may include one or more processors.
The memory is configured to store various types of data to support operation of the terminal. Examples of such data include instructions for any application or method operating on the terminal, contact data, phonebook data, messages, pictures, videos, etc. The memory may be implemented by any type or combination of volatile or non-volatile storage devices, such as static random access memory, electrically erasable programmable read only memory, magnetic memory, flash memory, magnetic or optical disks, or the like.
The power supply component may provide power to various components of the terminal.
The multimedia component includes a screen providing an output interface between the terminal and the user. In some embodiments of the present invention, the screen may include a liquid crystal display and a touch panel. In some embodiments of the present invention, the multimedia component may further comprise a front-facing camera and/or a rear-facing camera.
The audio component is configured to output and/or input an audio signal. For example, the audio component may include a microphone and, in some embodiments of the invention, the audio component may also include a speaker.
The input/output interface provides an interface between the processing component and a peripheral interface module, which may be a keyboard, click wheel, buttons, etc.
The sensor assembly includes one or more sensors for providing various aspects of status assessment to the terminal. In one embodiment of the invention, the sensor assembly may include a proximity sensor, a light sensor, an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor or a temperature sensor, or the like.
The communication component is configured to facilitate wired or wireless communication between the terminal and other devices. In one exemplary embodiment of the present invention, the communication part may include a near field communication module or the like.
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 (19)
1. An antenna comprising a metal frame in the form of a strip terminating in a ground plane;
the metal frame comprises a grounding section, a first radiation section and a second radiation section, wherein the first radiation section is positioned on one side of the grounding section, and the second radiation section is positioned on the other side of the grounding section;
the grounding section is connected with the grounding plate;
the first radiating section is connected with a first feeding point, and a first gap exists between the first radiating section and the ground plate;
the second radiating section is connected with a second feeding point, and a second gap exists between the second radiating section and the ground plate;
wherein the length of the metal frame is 1/4-3/8 times of the wavelength of the electromagnetic wave radiated by the antenna.
2. The antenna of claim 1, wherein the direction of current flow over the first radiating segment is opposite to the direction of current flow over the second radiating segment when the first feed point and the second feed point are fed simultaneously.
3. The antenna of claim 1, further comprising a first radiator;
the first radiator is positioned in the first gap;
the first radiator is connected with the first radiating section and the first feed point respectively.
4. The antenna of claim 1, further comprising a first radiator;
the first radiator is positioned in the first gap;
the first radiator is connected with the first radiation section.
5. The antenna of claim 1, further comprising a first radiator;
the first radiator is positioned in the first gap;
the first radiator is connected with the first feed point.
6. The antenna of any of claims 3-5, further comprising a second radiator, the second radiator located within the second gap;
the second radiator is connected to the second radiation section and the second feed point, or the second radiator is connected to the second radiation section, or the second radiator is connected to the second feed point.
7. The antenna of claim 1, wherein the length of the metal bezel is 3/8 times the wavelength of the electromagnetic wave radiated by the antenna.
8. The antenna of claim 1, wherein the first gap has a width in the range of (0, 3] millimeters and the second gap has a width in the range of (0, 3] millimeters.
9. The antenna of claim 8, wherein the width of the first gap is 1.5 millimeters and the width of the second gap is 1.5 millimeters.
10. The antenna according to claim 1, wherein at least one side of the terminal is provided with a metal casing having a strip shape, and the metal frame is a part of the metal casing and insulated from other parts of the metal casing.
11. The antenna of any one of claims 1 to 5, further comprising: a first feed line and a second feed line;
the first radiating section is connected with the first feed point through the first feed line;
the second radiating section is connected to the second feeding point through the second feeding line.
12. The antenna of any one of claims 7 to 10, further comprising: a first feed line and a second feed line;
the first radiating section is connected with the first feed point through the first feed line;
the second radiating section is connected to the second feeding point through the second feeding line.
13. An antenna, characterized in that the antenna comprises a strip-shaped metal frame in a terminal and a connecting structure;
the metal frame comprises a connecting section, a first radiation section and a second radiation section, wherein the first radiation section is positioned on one side of the connecting section, and the second radiation section is positioned on the other side of the connecting section;
the first radiating section is connected with a first feed point;
the second radiating section is connected with a second feeding point;
the first end of the connecting structure is connected with the first feeding point, the second end of the connecting structure is connected with the second feeding point, and the third end of the connecting structure is connected with the connecting section.
14. The antenna of claim 13, wherein the direction of current flow over the first radiating section is opposite to the direction of current flow over the second radiating section when the first and second feed points are fed simultaneously.
15. The antenna of claim 13, wherein the length of the metal bezel is 1/4 to 1/2 times the wavelength of the electromagnetic wave radiated by the antenna.
16. The antenna of claim 15, wherein the length of the metal bezel is 3/8 times the wavelength of the electromagnetic wave radiated by the antenna.
17. The antenna of claim 13, wherein at least one side of the terminal is provided with a metal casing having a strip shape, and the metal frame is a part of the metal casing and insulated from other parts of the metal casing.
18. The antenna of any one of claims 13 to 17, further comprising: a first feed line and a second feed line;
the first radiating section is connected with the first feed point through the first feed line;
the second radiating section is connected to the second feeding point through the second feeding line.
19. A terminal, characterized in that at least one antenna according to any of claims 1-12 is provided in the terminal, or that at least one antenna according to any of claims 13-18 is provided in the terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710249446.1A CN108736142B (en) | 2017-04-17 | 2017-04-17 | Antenna and terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710249446.1A CN108736142B (en) | 2017-04-17 | 2017-04-17 | Antenna and terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108736142A CN108736142A (en) | 2018-11-02 |
| CN108736142B true CN108736142B (en) | 2020-12-08 |
Family
ID=63924575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710249446.1A Active CN108736142B (en) | 2017-04-17 | 2017-04-17 | Antenna and terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108736142B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111628274B (en) * | 2019-02-27 | 2022-10-04 | 华为技术有限公司 | Antenna device and electronic apparatus |
| WO2020173292A1 (en) | 2019-02-27 | 2020-09-03 | 华为技术有限公司 | Antenna apparatus and electronic device |
| CN109888477B (en) * | 2019-03-01 | 2023-12-19 | 深圳市信维通信股份有限公司 | Dual-frequency dual-polarized MIMO antenna system applied to 5G communication and mobile terminal |
| CN109755743B (en) * | 2019-03-11 | 2021-06-01 | 青岛海信移动通信技术股份有限公司 | Antenna and terminal |
| CN109841944B (en) * | 2019-03-26 | 2021-07-27 | 青岛海信移动通信技术股份有限公司 | Antenna and terminal |
| CN113517557B (en) | 2020-04-10 | 2023-04-28 | 华为技术有限公司 | Electronic equipment |
| CN113517546B (en) * | 2020-04-10 | 2023-05-12 | 华为技术有限公司 | Electronic equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2360787A2 (en) * | 2009-11-30 | 2011-08-24 | Funai Electric Co., Ltd. | Multi-antenna apparatus |
| US20120274532A1 (en) * | 2011-04-27 | 2012-11-01 | Fujitsu Component Limited | Antenna device and electronic device |
| CN205069851U (en) * | 2015-10-16 | 2016-03-02 | 深圳市海派通讯科技有限公司 | Antenna system and mobile terminal thereof |
-
2017
- 2017-04-17 CN CN201710249446.1A patent/CN108736142B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2360787A2 (en) * | 2009-11-30 | 2011-08-24 | Funai Electric Co., Ltd. | Multi-antenna apparatus |
| US20120274532A1 (en) * | 2011-04-27 | 2012-11-01 | Fujitsu Component Limited | Antenna device and electronic device |
| CN205069851U (en) * | 2015-10-16 | 2016-03-02 | 深圳市海派通讯科技有限公司 | Antenna system and mobile terminal thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108736142A (en) | 2018-11-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108736142B (en) | Antenna and terminal | |
| CN111193110B (en) | Antenna device and electronic apparatus | |
| CN102738556B (en) | Antenna apparatus for portable terminal and portable terminal with same | |
| JP5684167B2 (en) | Radio terminal antenna system | |
| US9502776B2 (en) | Antenna surrounded by metal housing | |
| EP4195409A1 (en) | Antenna structure and electronic device | |
| KR102486184B1 (en) | Antenna structure and electronic device including the same | |
| CN108879112B (en) | Antenna array and terminal | |
| KR20220008348A (en) | Display module and mobile terminal | |
| EP4099504B1 (en) | Electronic device | |
| CN108963428B (en) | Antenna system and mobile terminal | |
| EP3905441A1 (en) | Antenna structure and high-frequency multi-band wireless communication terminal | |
| CN107946740B (en) | Shell, antenna device and mobile terminal | |
| KR20190087187A (en) | An apparatus of antenna and mobile device thereof | |
| CN212517503U (en) | Antenna device and electronic apparatus | |
| CN112768904B (en) | Antenna radiator, antenna assembly and electronic equipment | |
| KR20210133817A (en) | Antenna moduleand wireless communication device having the same | |
| CN108736132B (en) | Antenna assembly and electronic device | |
| CN108258399B (en) | Antenna and communication equipment | |
| KR20200112224A (en) | Antenna structure including transmission line transitting and feeding multiple frequency band and electronic device including the antenna structure | |
| US20240030588A1 (en) | Antenna structure and electronic device | |
| KR20160098959A (en) | Electronic device with multi-band antenna using persistent conductive border | |
| US10784565B2 (en) | Mobile device and antenna structure therein | |
| CN217334405U (en) | Antenna assembly and electronic equipment | |
| CN110459860B (en) | Rear shell assembly and electronic equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |