CN113839174B - Antenna assembly and electronic equipment - Google Patents
Antenna assembly and electronic equipment Download PDFInfo
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- CN113839174B CN113839174B CN202111123197.4A CN202111123197A CN113839174B CN 113839174 B CN113839174 B CN 113839174B CN 202111123197 A CN202111123197 A CN 202111123197A CN 113839174 B CN113839174 B CN 113839174B
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Classifications
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
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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
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
Abstract
The application provides an antenna assembly and electronic equipment, wherein the antenna assembly comprises a first antenna, a second antenna and a decoupling antenna, and the first antenna is used for radiating a first radio frequency signal of a first frequency band; the second antenna is used for radiating a second radio frequency signal of a second frequency band, and the frequency difference between any first frequency of the first frequency band and any second frequency of the second frequency band is smaller than a first frequency difference threshold; a decoupling antenna is disposed between the first antenna and the second antenna for coupling with an excited target antenna to generate a coupling attenuation signal, wherein the target antenna is at least one of the first antenna and the second antenna, and the coupling attenuation signal is used for attenuating the coupling signal generated between the first antenna and the second antenna. The antenna assembly can improve isolation between antennas in a limited space of an electronic device. The electronic device includes the antenna assembly.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to an antenna assembly and an electronic device.
Background
With the development of communication technology, the number of antennas in electronic devices is increasing, and how to ensure isolation between antennas is also becoming more and more important.
At present, isolation between antennas is mainly improved by increasing the distance between antennas.
However, the space in the electronic device is limited, and the distance between the antennas cannot be increased at will, resulting in poor isolation between the antennas.
Disclosure of Invention
The embodiment of the application provides an antenna assembly and electronic equipment, which can improve isolation between antennas in a limited space of the electronic equipment.
An antenna assembly, comprising:
the first antenna is used for radiating a first radio frequency signal of a first frequency band;
the second antenna is used for radiating a second radio frequency signal of a second frequency band, and the frequency difference value between any first frequency of the first frequency band and any second frequency of the second frequency band is smaller than a first frequency difference value threshold;
and a decoupling antenna disposed between the first antenna and the second antenna for coupling with an excited target antenna to generate a coupling attenuation signal, wherein the target antenna is at least one of the first antenna and the second antenna, and the coupling attenuation signal is used for attenuating the coupling signal generated between the first antenna and the second antenna.
An electronic device comprising an antenna assembly as described above.
The antenna assembly comprises a first antenna, a second antenna and a decoupling antenna, wherein the first antenna is used for radiating a first radio frequency signal of a first frequency band; the second antenna is used for radiating a second radio frequency signal of a second frequency band, and the frequency difference between any first frequency of the first frequency band and any second frequency of the second frequency band is smaller than a first frequency difference threshold; a decoupling antenna is disposed between the first antenna and the second antenna for coupling with an excited target antenna to generate a coupling attenuation signal, wherein the target antenna is at least one of the first antenna and the second antenna, and the coupling attenuation signal is used for attenuating the coupling signal generated between the first antenna and the second antenna. The decoupling antenna is coupled with the excited target antenna to generate the coupling attenuation signal, and the coupling attenuation signal is utilized to attenuate the coupling signal, so that the isolation degree can be improved without increasing the distance between the antennas, and the isolation degree between the antennas is improved in a limited space of the electronic equipment.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an electronic device according to one embodiment;
FIG. 2 is a second schematic diagram of an electronic device according to an embodiment;
fig. 3 is a schematic structural diagram of an antenna assembly according to an embodiment;
FIG. 4A is a schematic diagram of one embodiment of a coupling magnetic field and a decay magnetic field having opposite directions;
FIG. 4B is a schematic diagram showing a coupling magnetic field and a damping magnetic field with opposite directions according to one embodiment;
fig. 5 is a schematic structural diagram of an antenna assembly according to an embodiment;
fig. 6 is a third schematic structural diagram of an antenna assembly according to an embodiment;
fig. 7 is a schematic structural diagram of an antenna assembly according to an embodiment;
fig. 8 is a third schematic structural diagram of an electronic device according to an embodiment.
Detailed Description
In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present application, unless specifically stated and limited otherwise, a first antenna may be "on" or "off" a second antenna, either the first and second antennas being in direct contact, or the first and second antennas being in indirect contact via an intervening medium. Moreover, a first antenna "above", "over" and "above" a second antenna may be that the first antenna is directly above or obliquely above the second antenna, or simply means that the first antenna is higher in level than the second antenna. The first antenna being "under", "below" and "beneath" the second antenna may be the first antenna being directly under or obliquely under the second antenna, or simply means that the first antenna is less horizontal than the second antenna.
The antenna assembly according to the embodiment of the present application may be applied to an electronic device having a wireless communication function, where the electronic device may be a handheld device, a vehicle-mounted device, a wearable device, a computing device, or other processing devices connected to a wireless modem, and various forms of User Equipment (UE) (e.g., a Mobile phone), a Mobile Station (MS), and so on. For convenience of description, the above-mentioned devices are collectively referred to as electronic devices.
Referring to fig. 1 and 2, fig. 1 is one of schematic structural diagrams of an electronic device 10 according to an embodiment. Fig. 2 is a schematic diagram of a second embodiment of the electronic device 10. In one embodiment, the electronic device 10 is illustrated as a mobile phone. The electronic device 10 includes a display assembly 11 and a housing 12. Wherein the housing 12 includes a rim 121 and a rear cover 123. The display assembly 11 includes a display 111, and the display 111 may employ an OLED (Organic Light-Emitting Diode) screen or an LCD (Liquid Crystal Display) screen, and the display 11 may be used to display information and provide an interactive interface for a user. The display 111 may be rectangular or arc-angle rectangular, which may also be sometimes referred to as rounded rectangle, i.e., the four corners of the rectangle are rounded, and the four sides of the rectangle are substantially straight segments.
The frame 121 may be made of a metal material such as aluminum alloy or magnesium alloy or stainless steel, or an insulating material such as plastic. The frame 121 is disposed on the periphery of the display assembly 11 for supporting and protecting the display assembly 11. The display assembly 11 may be fixedly connected to the frame 121 by dispensing or the like. The bezel 121 may further extend inwardly of the electronic device 10 to form a midplane, the integrally formed midplane and bezel 121 sometimes being referred to as a middle bezel. The display assembly 11 may be fixedly connected to the bezel 121 or the middle plate by a dispensing process or the like.
Referring to fig. 2, the border 121 is generally rectangular in shape and includes top and bottom side frames 1213, 1215 disposed opposite each other, and first and second side frames 1217, 1219 connected between the top and bottom side frames 1213, 1215, the first and second side frames 1217, 1219 being disposed opposite each other, the top, first, bottom and second side frames 1213, 1217, 1215, 1219 being connected end to end in sequence and located at the periphery of the middle plate. The connection between the specific frames can be right-angle connection or arc transition connection. Further, when the bezel is a metal bezel, a plurality of metal bezel antennas may be formed in the bezel 121. Specifically, the metal frame antenna can be formed by a fracture arranged on the frame.
The rear cover 123 is disposed on a side facing away from the displayable area of the display screen 111 and is connected to the frame 121. Further, the display screen assembly 11 and the rear cover 123 are respectively located on opposite sides of the middle plate. The rear cover 123 may be made of a metal material such as aluminum alloy or magnesium alloy or stainless steel, or an insulating material such as plastic or glass or ceramic or leather, denim, bamboo, etc. Further, the rear cover 123 is connected to the frame 121 to define a receiving cavity, i.e. a mounting space, for mounting electronic components such as a battery, a motherboard, a camera module, etc. of the electronic device 10.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an antenna assembly 20 according to an embodiment. As shown in fig. 3, an embodiment provides an antenna assembly 20 including a first antenna 21, a second antenna 22, and a decoupling antenna 23, wherein:
the first antenna 21 is configured to radiate a first radio frequency signal in a first frequency band; the second antenna 22 is configured to radiate a second radio frequency signal in a second frequency band, and a frequency difference between any first frequency in the first frequency band and any second frequency in the second frequency band is less than a first frequency difference threshold; a decoupling antenna 23 is arranged between the first antenna 21 and the second antenna 22 for coupling with an excited target antenna to generate a coupling attenuation signal, wherein the target antenna is at least one of the first antenna 21 and the second antenna 22, and the coupling attenuation signal is used for attenuating the coupling signal generated between the first antenna 21 and the second antenna 22.
Wherein the first frequency refers to any frequency in the first frequency band. The second frequency refers to any frequency in the second frequency band. In this embodiment, the frequency difference between any first frequency of the first frequency band and any second frequency of the second frequency band is smaller than the first frequency difference threshold, which can be understood as that the first frequency band and the second frequency band are adjacent frequency bands. For example, the first frequency range is 2400-2500Mhz, and the second frequency range is 2500-2690Mhz, and the difference between any first frequency of the first frequency range and any second frequency of the second frequency range is less than 290Mhz. It can be appreciated that the smaller the first frequency difference threshold, the closer the first frequency band and the second frequency band are, and the specific size of the first frequency difference threshold is not limited in this embodiment.
Specifically, since the radiation frequency bands of the first antenna 21 and the second antenna 22 are adjacent frequency bands, in some possible cases, when one of the first antenna 21 and the second antenna 22 is excited, the other of the first antenna 21 and the second antenna 22 is also affected by the excited target antenna to generate a coupling signal, and in some cases of examples, on the one hand, the generated coupling signal enters an isolation circuit connected to the antenna generating the coupling signal, resulting in deterioration of the isolation of the first antenna 21 and the second antenna 22; on the other hand, the generated coupling signal adversely affects the excited target antenna, resulting in a deterioration in isolation between the first antenna 21 and the second antenna 22. At this time, since the decoupling antenna 23 is disposed between the first antenna 21 and the second antenna 22, the decoupling antenna 23 is also coupled with the excited target antenna to generate a coupling attenuation signal. The coupling attenuation signal generated by coupling the decoupling antenna 23 with the excited target antenna is used to attenuate the coupling signal generated between the first antenna 21 and the second antenna 22, so that the coupling signal is attenuated, and the influence of the coupling signal on the coupled target antenna and on the isolation circuit is also smaller, so that the isolation between the first antenna 21 and the second antenna 22 is increased.
According to the technical scheme of the embodiment, the decoupling antenna 23 is coupled with the excited target antenna to generate the coupling attenuation signal, and the coupling attenuation signal can be used for attenuating the coupling signal generated between the first antenna 21 and the second antenna 22, so that the coupling signal is weakened, the influence of the coupling signal on the coupled target antenna is smaller, the isolation degree can be improved without increasing the distance between the antennas, and the isolation degree between the antennas is improved in a limited space of the electronic equipment 10.
Optionally, in an embodiment, the first radio frequency signal is a 2.4g wifi signal, and the second radio frequency signal is an N41 band signal.
For example, assuming that the first antenna 21 is excited, when one antenna is excited, the other antenna located in the electromagnetic field area of the antenna generates an induced current according to the law of electromagnetic induction, the second antenna 22 located in the electromagnetic field area of the first antenna 21 generates an induced current, and the induced current is a coupling signal generated between the first antenna 21 and the second antenna 22. In some possible cases, on the one hand, the induced current enters an isolation circuit connected to the second antenna 22, causing the isolation between the first antenna 21 and the second antenna 22 to be poor, and the two channels interfere with each other; on the other hand, the induced current causes the second antenna 22 to radiate a magnetic field, which in turn causes interference to the excited first antenna 21, resulting in a deformed radiation pattern of the first antenna 21, which in turn further reduces the isolation between the first antenna 21 and the second antenna 22. At this time, the decoupling antenna 23 is coupled with the excited first antenna 21 to generate an attenuation current, and the attenuation current is the coupling attenuation signal, and the coupling signal is attenuated by the coupling attenuation signal, so that the coupling signal is weakened, the influence of the coupling signal on the coupled first antenna 21 is reduced, and the influence of the coupling signal on the isolation circuit connected with the second antenna 22 is also reduced, so that the isolation between the first antenna 21 and the second antenna 22 is enhanced.
It will be appreciated that the above-described reasons for the deterioration of the isolation between antennas are merely examples, and the present embodiment is not particularly limited.
In this embodiment, one of the first antenna 21 and the second antenna 22 may be excited, or the first antenna 21 and the second antenna 22 may be excited simultaneously, which is not specifically limited herein and is determined according to the actual excitation condition. Furthermore, the first antenna 21 is configured to radiate radio frequency signals in a first frequency band, which means that the first antenna 21 radiates radio frequency signals in at least the first frequency band. Similarly, the second antenna 22 is configured to radiate radio frequency signals in the second frequency band, which means that the second antenna 22 radiates radio frequency signals in at least the second frequency band.
In one embodiment, the coupling signal comprises a first induced current generated by the second antenna 22 when the first antenna 21 is excited, and/or a second induced current generated by the first antenna 21 when the second antenna 22 is excited; the decoupling antenna 23 acts as a decoupling branch of the target antenna being excited; when the first antenna 21 is excited, the decoupling antenna 23 is coupled with the first antenna 21 to generate a first attenuation current for attenuating the first induced current; when the second antenna 22 is excited, the decoupling antenna 23 is coupled with the second antenna 22 to generate a second attenuation current for attenuating the second induced current.
Specifically, when the first antenna 21 is excited, the second antenna 22 generates a first induced current, the first coupling magnetic field generated by the first induced current in the second antenna 22 will cause interference to the first antenna 21, at this time, the decoupling antenna 23 generates a first attenuation current as a decoupling branch of the excited first antenna 21, the first attenuation current generates a first attenuation magnetic field in the decoupling antenna 23, and the first coupling magnetic field is attenuated by the first attenuation magnetic field, and because the first coupling magnetic field is weakened, the interference of the first coupling magnetic field to the first antenna 21 is also reduced, and meanwhile, because the first coupling magnetic field is weakened, the first induced current is correspondingly weakened, and further, the influence on the isolation circuit connected to the second antenna 22 is also reduced. When the second antenna 22 is excited, the first antenna 21 generates a second induced current, and the second coupling magnetic field generated by the second induced current in the first antenna 21 causes interference to the second antenna 22, at this time, the decoupling antenna 23 generates a second attenuation current as a decoupling branch of the excited second antenna 22, the second attenuation current generates a second attenuation magnetic field in the decoupling antenna 23, and the second coupling magnetic field is attenuated by the second attenuation magnetic field, so that the interference of the second coupling magnetic field to the second antenna 22 is reduced due to the attenuation of the second coupling magnetic field, and meanwhile, the second coupling magnetic field is reduced, which is equivalent to the attenuation of the second induced current, and further, the influence on the isolation circuit connected with the first antenna 21 is also reduced.
In one embodiment, the first attenuation magnetic field generated by the first attenuation current at the decoupling antenna 23 is opposite to the direction of the first coupling magnetic field generated by the first induced current at the second antenna 22, and/or the second attenuation magnetic field generated by the second attenuation current at the decoupling antenna 23 is opposite to the direction of the second coupling magnetic field generated by the second induced current at the first antenna 21.
In this embodiment, the first attenuation magnetic field generated by the first attenuation current at the decoupling antenna 23 is opposite to the first coupling magnetic field generated by the first induction current at the second antenna 22, and the second attenuation magnetic field generated by the second attenuation current at the decoupling antenna 23 is opposite to the second coupling magnetic field generated by the second induction current at the first antenna 21, so that the effect of magnetic field cancellation is better due to the opposite direction, and the coupling signal generated between the first antenna 21 and the second antenna 22 can be attenuated to a greater extent.
It should be noted that, in the embodiment, the coupling magnetic field and the attenuation magnetic field may be opposite, specifically, the coupling magnetic field and the attenuation magnetic field are parallel; it is also possible that the coupling magnetic field is not exactly opposite, in particular the direction of the decaying magnetic field is not parallel.
Referring to fig. 4A and 4B, fig. 4A is one of schematic diagrams of a coupling magnetic field and a damping magnetic field provided by an embodiment, and fig. 4B is the other schematic diagram of a coupling magnetic field and a damping magnetic field provided by an embodiment. As shown in fig. 4A and 4B, the coupling magnetic field and the attenuating magnetic field described in this embodiment may be opposite and parallel to each other, or opposite and not parallel to each other, and are not particularly limited herein.
In one embodiment, the coupling magnetic field is optionally equal in magnitude and opposite in direction to the decay magnetic field. It will be appreciated that the decoupling effect of the decoupling antenna 23 is better if the coupling magnetic field and the attenuating magnetic field are equal in magnitude and diametrically opposite.
Referring to fig. 5, fig. 5 is a schematic structural diagram of an antenna assembly 20 according to an embodiment. As shown in fig. 5, the first antenna 21 has a first end 211, the second antenna 22 has a second end 212, the first end 211 is disposed opposite to the second end 212, the decoupling antenna 23 is disposed between the first end 211 and the second end 212, and the total length of the decoupling antenna 23 is greater than the length of the second end 212.
In this embodiment, by setting the total length of the decoupling antenna 23 to be greater than the length of the second end 212, the decoupling effect of the decoupling antenna 23 can be ensured, so that the isolation between the first antenna 21 and the second antenna 22 is improved as much as possible.
In some cases of the example, the decoupling antenna 23 needs to be provided to meet a certain length requirement in order to ensure the decoupling effect of the decoupling antenna 23 due to the limited space within the electronic device 10, but the length requirement of the decoupling antenna 23 contradicts the limited space within the electronic device 10.
In one embodiment, at least one end of the decoupling antenna 23 is bent toward the second end 212.
In the present embodiment, by providing at least one end of the decoupling antenna 23 to be bent toward the second end 212, the length of the portion of the decoupling antenna 23 provided between the first end 211 and the second end 212 is shorter, which corresponds to a reduction in the space in the extending direction of the portion of the decoupling antenna 23 provided between the first end 211 and the second end 212, while satisfying the length requirement of the decoupling antenna 23.
With continued reference to fig. 5, in one embodiment, the first antenna 21 includes a first signal source 213 and a first radiator 214. Wherein:
the first signal source 213 is used for feeding in radio frequency signals; the first radiator 214 is provided with a first grounding point and a first feeding point, the first grounding point is used for being connected with a ground plane, the first feeding point is used for being connected with the first signal source 213, the first radiator 214 comprises a first branch 2141 and a second branch 2142, a third coupling gap 2143 is formed between the first branch 2141 and the second branch 2142, the first feeding point is arranged on the first branch 2141, the first grounding point is arranged on the second branch 2142, the first branch 2141 is used for exciting a third radio frequency signal of a third frequency band, and the second branch 2142 is used as a parasitic branch of the first branch 2141 and is used for exciting the first radio frequency signal.
Specifically, the first feeding point is disposed on the first branch 2141, and the first signal source 213 is connected to the first feeding point, which is equivalent to that the first signal source 213 is connected to the first branch 2141, so that the radio frequency signal of the first signal source 213 is fed into the first branch 2141 through the first feeding point, so as to excite the third radio frequency signal in the third frequency band, and since the third coupling gap 2143 is disposed between the second branch 2142 and the first branch 2141, the first radio frequency signal can be excited at the second branch 2142. Any frequency between the third frequency band and the first frequency band is different. For example, if the first antenna 21 is a MIMO (multiple-in multiple-out) antenna radiating WiFi signals, the first radio frequency signal is a 2.4g WiFi signal, and the third radio frequency signal is a 5g WiFi signal.
In this embodiment, by providing the third coupling slot 2143 between the first branch 2141 and the second branch, the first antenna 21 can excite the third radio frequency signal in the third frequency band and excite the first radio frequency signal, which enriches the radiation frequency band of the first antenna 21. In addition, the second branch 2142 excites the first radio frequency signal in a parasitic manner, so that the position of a radiation intensity point of the second branch 2142 radiating the first radio frequency signal can be changed. The position of the radiation intensity point refers to the position with the maximum radiation intensity.
In one embodiment, the first radiator 214 further includes a third branch 2144, the second branch 2142 is disposed around the third branch 2144, the third branch 2144 is connected to the first branch 2141, and the third branch 2144 is used to excite the first radio frequency signal.
In this embodiment, the second branch 2142 is disposed around the third branch 2144, and the third branch 2144 is connected to the first branch 2141, so that the third branch 2144 can also excite the first radio frequency signal, that is, in the first antenna 21, there is the first radio frequency signal of the first frequency band radiated by the third branch 2144 and the second branch 2142 together, which can ensure the performance of the first antenna 21 radiating the first radio frequency signal.
It should be noted that, in order to improve the performance of the first antenna 21 in radiating the first radio frequency signal, optionally, the radiation intensity point of the third branch 2144 radiating the first frequency band is set away from the radiation intensity point of the second branch 2142 radiating the first frequency band, so that at least one branch of the second branch 2142 and the third branch 2144 can be ensured to be interfered as little as possible, thereby improving the performance of the first antenna 21 in radiating the first radio frequency signal.
With continued reference to fig. 5, in one embodiment, the second antenna 22 includes a second signal source 221 and a second radiator 222, wherein:
the second signal source 221 is used for feeding a radio frequency signal; a second radiator 222, where the second radiator 222 is provided with a second grounding point and a second feeding point, the second grounding point is used for connecting with a ground plane, the second feeding point is used for connecting with the second signal source 221, and the second radiator 222 is provided with a slot 2221 to divide the second radiator 222 into a fourth branch 2222 and a fifth branch 2223; the fourth branch 2222 is configured to excite a second radio frequency signal in the second frequency band, and the fifth branch 2223 is configured to excite a fourth radio frequency signal in a fourth frequency band.
Specifically, the second signal source 221 feeds the radio frequency signal through the second feeding point, and since the second radiator 222 is provided with the slot 2221, the slot 2221 divides the second radiator 222 into the fourth branch 2222 and the fifth branch 2223, the fourth branch 2222 is used for exciting the second radio frequency signal in the second frequency band, and the fifth branch 2223 is used for exciting the fourth radio frequency signal in the fourth frequency band, that is, the slot 2221 provided by the second radiator 222 can radiate radio frequency signals in more than two frequency bands, thereby enriching the radiation frequency band of the second antenna 22. Optionally, the first radio frequency signal is an N41 band signal, and the fourth radio frequency signal is an N78 band signal.
In one embodiment, the radiating strong point of the first radio frequency signal by the first antenna 21 is disposed near the first end 211. The radiation intensity point at which the second antenna 22 radiates the second radio frequency signal is disposed near the second end 212.
Referring to fig. 6, fig. 6 is a third schematic structural diagram of the antenna assembly 20 according to an embodiment. As shown in fig. 6, the antenna assembly 20 further includes a third antenna 24, wherein:
the third antenna 24 is disposed at a side of the first antenna 21 away from the second antenna 22, the third antenna 24 is configured to radiate a fifth radio frequency signal in a fifth frequency band, and a portion of the third antenna 24 where the fifth radio frequency signal is strongest is far from the portion of the second branch 2142 where the first radio frequency signal is strongest; the frequency difference between any third frequency of the fifth frequency band and any first frequency of the first frequency band is smaller than a second frequency difference threshold.
Wherein the third frequency refers to any frequency in the fifth frequency band. In this embodiment, the frequency difference between any third frequency of the fifth frequency band and any first frequency of the first frequency band is smaller than the second frequency difference threshold, which can be understood that the first frequency band and the fifth frequency band are adjacent frequency bands. For example, the first band is 2400-2500Mhz and the fifth band is 2500-2690Mhz. The frequency difference between any third frequency of the fifth frequency band and any first frequency of the first frequency band is less than 290Mhz. It can be appreciated that the smaller the second frequency difference threshold, the closer the first frequency band and the fifth frequency band are, and the specific size of the second frequency difference threshold is not limited in this embodiment. Optionally, the fifth radio frequency signal is an N41 band signal. It should be noted that, the third antenna 24 radiates the fifth radio frequency signal in the fifth frequency band, which means that the third antenna 24 radiates the radio frequency signal in at least the fifth frequency band.
Specifically, since the portion of the third antenna 24 that radiates the fifth rf signal that is strongest is far from the portion of the second branch 2142 that radiates the first rf signal that is strongest, since the radiation strong point of the third antenna 24 that radiates the fifth rf signal is far from the radiation strong point of the first antenna 21 that radiates the first rf signal, even if the first antenna 21 excites the first rf signal, no significant influence is caused on the third antenna 24. Similarly, even if the third antenna 24 excites the fifth radio frequency signal, it does not have a great influence on the first antenna 21.
In this embodiment, by setting the portion of the third antenna 24 that radiates the strongest fifth rf signal away from the portion of the second branch 2142 that radiates the strongest first rf signal, the radiation intensity point of the fifth rf signal radiated by the third antenna 24 is far from the radiation intensity point of the first rf signal radiated by the first antenna 21, so that the interaction between the first antenna 21 and the third antenna 24 is reduced, and the isolation between the first antenna 21 and the third antenna 24 is improved.
Optionally, the first antenna 21 is a 2.4G (2400-2500 Mhz)/5G WIFI antenna, the second antenna 22 is a 5G (N41: 2500-2690 Mhz) DRX antenna, and the third antenna 24 is a 4G/5G (B/N41: 2500-2690 Mhz) PRX antenna. In one embodiment, the third antenna 24, the first antenna 21 and the second antenna 22 are adjacent in sequence.
In one embodiment, the first antenna 21 is a PIFA antenna (planar inverted F antenna) and the second antenna 22 is a monopole antenna. The third antenna 24 is an IFA antenna (inverted F antenna).
Referring to fig. 7, fig. 7 is a schematic diagram of an antenna assembly 20 according to an embodiment. As shown in fig. 7, the decoupling antenna 23 comprises a floating antenna stub 231, wherein:
the suspended antenna branch 231 includes a suspended radiator 2311 and an isolation member 2312, the suspended radiator 2311 is grounded through the isolation member 2312, a first coupling gap 2313 is formed between the suspended radiator 2311 and the first antenna 21, and a second coupling gap 2314 is formed between the suspended radiator 2311 and the second antenna 22.
The isolation member 2312 is a member for isolating the floating radiator 2311 from the ground plane so that the floating radiator 2311 can achieve a decoupling effect. Alternatively, the isolation member 2312 may be a capacitor or the like, which is not limited herein.
Specifically, since the floating radiator 2311 has the first coupling slot 2313 between the first antenna 21 and the floating radiator 2311, when the first antenna 21 is excited, a first attenuation current is parasitic on the floating radiator 2311, so that the first induced current is attenuated by the first attenuation current. Similarly, since the second coupling slot 2314 is formed between the floating radiator 2311 and the second antenna 22, when the second antenna 22 is excited, a second attenuation current is parasitic on the floating radiator 2311, so that the second induced current is attenuated by the second attenuation current.
In the present embodiment, by providing the first coupling slot 2313 between the floating radiator 2311 and the first antenna 21 and providing the second coupling slot 2314 between the floating radiator 2311 and the second antenna 22, when one of the first antenna 21 and the second antenna 22 is excited, an attenuation current is generated in the floating radiator 2311, thereby achieving the decoupling effect.
In one embodiment, the suspended radiator 2311 is optionally at the same elevation as the first antenna 21. Specifically, the floating radiator 2311 is at the same height as the first antenna 21, and may be a distance between a side of the floating radiator 2311 close to the ground plane and the ground plane, and a distance between a side of the first antenna 21 close to the ground plane and the ground plane are consistent; the distance between the center of gravity axis of the floating radiator 2311 and the ground plane may be equal to the distance between the center of gravity axis of the first antenna 21 and the ground plane.
It will be appreciated that the inclusion of the floating antenna stub 231 in the decoupling antenna 23 is merely an example, provided that it is capable of achieving the decoupling effect in the present embodiment, and is not particularly limited herein.
Referring to fig. 8, fig. 8 is a third schematic structural diagram of the electronic device 10 according to an embodiment. The electronic device 10 of the present embodiment includes an antenna assembly 20. The antenna assembly 20 may refer to any of the above embodiments, and the description of this embodiment is omitted.
In one embodiment, optionally, the electronic device 10 includes a housing 12, the housing 12 including a back cover and a bezel coupled to the back cover to define a receiving cavity, the bezel including a top frame 1213 and a bottom frame 1215 disposed opposite each other, and a first side frame 1217 and a second side frame 1219 coupled between the top frame 1213 and the bottom frame 1215, the first side frame 1217 and the second side frame 1219 disposed opposite each other;
the first antenna 21 is disposed near a first side frame 1217 or a second side frame 1219 of the top frame 1213, the second antenna 22 is disposed on the same side as the first antenna 21, and a distance between the second antenna 22 and the top frame 1213 is greater than a distance between the first antenna 21 and the top frame 1213, wherein radiation currents of the first antenna 21 and the second antenna 22 are each directed in a direction of the top frame 1213 by the bottom frame 1215.
With continued reference to fig. 8, in one embodiment, when the antenna assembly 20 includes a third antenna 24, the third antenna 24 is disposed on one side of the top frame 1213 that is proximate to the first antenna 21, and the radiation current of the third antenna 24 is directed from one side proximate to the first antenna 21 in a direction away from the other side of the first antenna 21.
It will be appreciated that the details of this embodiment may refer to the description of any one of the above embodiments, and this embodiment is not repeated.
The foregoing examples illustrate only a few embodiments of the application and are described in detail herein without thereby limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (14)
1. An antenna assembly, comprising:
the first antenna is used for radiating a first radio frequency signal of a first frequency band;
the second antenna is used for radiating a second radio frequency signal of a second frequency band, and the frequency difference value between any first frequency of the first frequency band and any second frequency of the second frequency band is smaller than a first frequency difference value threshold;
a decoupling antenna disposed between the first antenna and the second antenna for coupling with an excited target antenna to generate a coupling attenuation signal, wherein the target antenna is at least one of the first antenna and the second antenna, and the coupling attenuation signal is used for attenuating the coupling signal generated between the first antenna and the second antenna;
the first antenna is provided with a first end portion, the second antenna is provided with a second end portion, the first end portion is opposite to the second end portion, the decoupling antenna is arranged between the first end portion and the second end portion, and the total length of the decoupling antenna is larger than that of the second end portion.
2. The antenna assembly of claim 1, wherein the coupling signal comprises a first induced current generated by the second antenna when the first antenna is energized and/or a second induced current generated by the first antenna when the second antenna is energized;
the decoupling antenna acts as a decoupling branch of the target antenna being excited;
the decoupling antenna is coupled with the first antenna to generate a first decay current when the first antenna is energized, the first decay current for decaying the first induced current;
the decoupling antenna is coupled with the second antenna to generate a second decay current when the second antenna is excited, the second decay current for decaying the second induced current.
3. The antenna assembly according to claim 2, wherein a first decaying magnetic field generated by the first decaying current at the decoupling antenna is opposite to a direction of a first coupling magnetic field generated by the first induced current at the second antenna and/or a second decaying magnetic field generated by the second decaying current at the decoupling antenna is opposite to a direction of a second coupling magnetic field generated by the second induced current at the first antenna.
4. The antenna assembly of claim 1, wherein at least one end of the decoupling antenna is bent toward the second end.
5. The antenna assembly of claim 1, wherein the first antenna is a PIFA antenna and the second antenna is a monopole antenna.
6. The antenna assembly of claim 5, wherein the decoupling antenna comprises a floating antenna stub comprising a floating radiator and an isolation member, the floating radiator being grounded through the isolation member, the floating radiator having a first coupling slot with the first antenna and a second coupling slot with the second antenna.
7. The antenna assembly of claim 1, wherein the first antenna comprises:
the first signal source is used for feeding in radio frequency signals;
the first radiator, the first radiator is equipped with first ground point and first feed point, first ground point is used for connecting the ground plane, first feed point is used for connecting first signal source, the first radiator includes first branch and second branch, first branch with have the third coupling gap between the second branch, first feed point sets up on the first branch, first ground point sets up on the second branch, first branch is used for exciting the third radio frequency signal of third frequency channel, the second branch is as the parasitic branch of first branch is used for exciting the first radio frequency signal.
8. The antenna assembly of claim 7, wherein the first radiator further comprises a third stub, the second stub disposed about the third stub, the third stub connected to the first stub, the third stub for energizing the first radio frequency signal.
9. The antenna assembly of claim 7, further comprising:
the third antenna is arranged on one side, far away from the second antenna, of the first antenna and is used for radiating fifth radio frequency signals of a fifth frequency band, and the strongest part of the fifth radio frequency signals radiated by the third antenna is far away from the strongest part of the first radio frequency signals radiated by the second branch;
the frequency difference between any third frequency of the fifth frequency band and any first frequency of the first frequency band is smaller than a second frequency difference threshold.
10. The antenna assembly of claim 1, wherein the second antenna comprises:
the second signal source is used for feeding in radio frequency signals;
the second radiator is provided with a second grounding point and a second feeding point, the second grounding point is used for being connected with a ground plane, the second feeding point is used for being connected with the second signal source, and the second radiator is provided with a slot so as to divide the second radiator into a fourth branch and a fifth branch;
the fourth branch is used for exciting a second radio frequency signal of the second frequency band, and the fifth branch is used for exciting a fourth radio frequency signal of the fourth frequency band.
11. The antenna assembly of any one of claims 1-10, wherein the first radio frequency signal is a 2.4g wifi signal and the second radio frequency signal is an N41 band signal.
12. An electronic device comprising an antenna assembly as claimed in any one of claims 1-11.
13. The electronic device of claim 12, wherein the electronic device further comprises:
the shell comprises a rear cover and a frame, wherein the frame is connected with the rear cover to define a containing cavity, the frame comprises a top frame and a bottom frame which are arranged in a back-to-back mode, and a first side frame and a second side frame which are connected between the top frame and the bottom frame, and the first side frame and the second side frame are arranged in a back-to-back mode;
the first antenna is arranged near a first side frame or a second side frame of the top frame, the second antenna and the first antenna are arranged on the same side, and the distance between the second antenna and the top frame is larger than the distance between the first antenna and the top frame, wherein the radiation currents of the first antenna and the second antenna are directed in the direction of the top frame by the bottom frame.
14. The electronic device of claim 13, wherein when the antenna assembly includes a third antenna, the third antenna is disposed on a side of the top bezel that is proximate to the first antenna, the radiation current of the third antenna directed from the side proximate to the first antenna to a direction away from the other side of the first antenna.
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| CN202111123197.4A CN113839174B (en) | 2021-09-24 | 2021-09-24 | Antenna assembly and electronic equipment |
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