CN113013594A - Antenna assembly and electronic equipment - Google Patents

Antenna assembly and electronic equipment Download PDF

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Publication number
CN113013594A
CN113013594A CN202110218630.6A CN202110218630A CN113013594A CN 113013594 A CN113013594 A CN 113013594A CN 202110218630 A CN202110218630 A CN 202110218630A CN 113013594 A CN113013594 A CN 113013594A
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CN
China
Prior art keywords
electrically connected
radiator
capacitor
antenna
frequency band
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Granted
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CN202110218630.6A
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Chinese (zh)
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CN113013594B (en
Inventor
吴小浦
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Priority to CN202110218630.6A priority Critical patent/CN113013594B/en
Publication of CN113013594A publication Critical patent/CN113013594A/en
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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
    • 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
    • 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
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/10—Resonant slot antennas
    • 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
    • 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
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The application provides an antenna assembly and an electronic device. The antenna assembly comprises a first antenna, a second antenna and a third antenna. The first antenna comprises a first radiating body and a first signal source, wherein the first signal source is electrically connected to a first feed point of the first radiating body so as to at least receive and transmit electromagnetic wave signals of a first frequency band. The second antenna comprises a second radiator and a signal source, the second radiator is a suspension antenna radiator, a first gap is formed between one end of the second radiator and the first radiator and the second radiator is mutually coupled, the second signal source is electrically connected to a second feed point of the second radiator to at least receive and transmit electromagnetic wave signals of a second frequency band and a third frequency band, the second frequency band is a GPS-L5 frequency band, and the third frequency band is a GPS-L1 frequency band. The third antenna comprises a third radiator and a third signal source, and a second gap is formed between the other ends of the third radiator and the second radiator and is coupled with the third radiator; the third signal source is electrically connected to the third feed point of the third radiator to at least receive and transmit electromagnetic wave signals of a fourth frequency band.

Description

Antenna assembly and electronic equipment
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 technology, electronic devices such as mobile phones and the like with communication functions have higher popularity and higher functions. Antenna assemblies are often included in electronic devices to implement communication functions of the electronic devices. However, the antenna assembly in the electronic device in the related art has not good enough communication performance, and there is room for improvement.
Disclosure of Invention
In a first aspect, the present application provides an antenna assembly. The antenna assembly includes:
the first antenna comprises a first radiating body and a first signal source, wherein the first radiating body is provided with a first feeding point, and the first signal source is electrically connected to the first feeding point so that the first antenna at least receives and transmits electromagnetic wave signals of a first frequency band;
the second antenna comprises a second radiator and a second signal source, the second radiator is a suspension antenna radiator, a first gap is formed between one end of the second radiator and the first radiator and the second radiator is mutually coupled, the second radiator is provided with a second feeding point, and the second signal source is electrically connected to the second feeding point so that the second antenna can at least receive and transmit electromagnetic wave signals of a second frequency band and a third frequency band, wherein the second frequency band is a GPS-L5 frequency band, and the third frequency band is a GPS-L1 frequency band; and
the third antenna comprises a third radiator and a third signal source, and a second gap is formed between the third radiator and the other end of the second radiator and is coupled with the third radiator; the third radiator is provided with a third feed point, and the third signal source is electrically connected with the third feed point so that the third antenna at least receives and transmits electromagnetic wave signals of a fourth frequency band.
In a second aspect, the present application also provides an electronic device comprising an antenna assembly as described in the first aspect.
In the related art, the second antenna can only receive and transmit electromagnetic wave signals of one frequency band, and if the antenna assembly needs to support electromagnetic wave signals of a second frequency band, an additional antenna needs to be provided to support electromagnetic wave signals of the second frequency band; therefore, in the related art, more antennas are needed to support the electromagnetic wave signals of the first frequency band, the second frequency band, the third frequency band and the fourth frequency band, so that the size of the antenna assembly is larger. In the antenna assembly in this embodiment, an additional antenna is not required to be disposed to support the electromagnetic wave signal of the electromagnetic wave signal in the second frequency band, and therefore, the size of the antenna assembly is small. The additional antenna is arranged to support the electromagnetic wave signals of the second frequency band, so that the cost of the antenna assembly is higher; the stacking difficulty of the antenna assembly with other devices increases when the antenna assembly is applied in an electronic device. In the embodiment, the antenna assembly does not need to be additionally provided with an antenna to support the electromagnetic wave signal of the second frequency band, so that the cost of the antenna assembly is low; when the antenna module is applied to the electronic equipment, the stacking difficulty is low. In addition, providing additional antennas to support the second band of electromagnetic wave signals may also result in increased radio frequency link insertion loss for the antenna assembly. The second antenna in the antenna module provided by the application can receive and transmit electromagnetic wave signals of a second frequency band and electromagnetic wave signals of a third frequency band, and insertion loss of a radio frequency link can be reduced.
In addition, the antenna assembly provided by the embodiment of the application can realize the transceiving of the electromagnetic wave signals of the first frequency band, the electromagnetic wave signals of the second frequency band, the electromagnetic wave signals of the third frequency band and the electromagnetic wave signals of the fourth frequency band by using fewer radiators, so that the coverage of a wider frequency band is realized, and the antenna assembly has a better communication effect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of an antenna assembly provided in an embodiment of the present application.
Fig. 2 is a schematic diagram of a frequency-selective filter circuit according to an embodiment of the present application.
Fig. 3 is a schematic diagram of an antenna assembly provided in another embodiment of the present application.
Fig. 4 is a schematic diagram of the isolation circuit shown in fig. 3.
Fig. 5 is a schematic RL plot of a first one of the antenna assemblies shown in fig. 3.
Fig. 6 is a schematic diagram of a first matching circuit according to an embodiment of the present disclosure.
Fig. 7 is a schematic RL plot of a second one of the antenna assemblies shown in fig. 3.
Fig. 8 is a schematic diagram of a second matching circuit according to an embodiment of the present disclosure.
Fig. 9 is a schematic RL plot of a third one of the antenna assemblies shown in fig. 3.
Fig. 10 is a schematic diagram of a third matching circuit according to an embodiment of the present disclosure.
Fig. 11 to 18 are schematic diagrams of sub-matching circuits provided in various embodiments, respectively.
Fig. 19 is a return loss curve diagram of a first antenna, a second antenna, and a third antenna in the antenna assembly provided by the present application.
Fig. 20 is a schematic diagram illustrating isolation curves of a first antenna, a second antenna, and a third antenna in an antenna assembly provided herein.
Fig. 21 is a schematic view of an antenna assembly provided in accordance with yet another embodiment of the present application.
Fig. 22 is a diagram illustrating the distribution of electric field lines when the target object is not close to the antenna assembly.
Fig. 23 is a schematic diagram of the distribution of electric field lines when a target object is close to an antenna assembly.
Fig. 24 is a schematic view of an antenna assembly provided in accordance with yet another embodiment of the present application.
Fig. 25 is a schematic view of an antenna assembly provided in accordance with yet another embodiment of the present application.
Fig. 26 is a schematic circuit structure diagram of an antenna assembly according to an embodiment of the present application.
Fig. 27 is a perspective view of an electronic device according to an embodiment of the present application.
FIG. 28 is a cross-sectional view taken along line I-I of FIG. 27, according to one embodiment.
Fig. 29 is a schematic view of an electronic device according to an embodiment of the present application.
Fig. 30 is a schematic view of an electronic device according to another embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without inventive step, are within the scope of the present disclosure.
Reference herein to "an embodiment" or "an implementation" means that a particular feature, structure, or characteristic described in connection with the embodiment or implementation can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
The present application provides an antenna assembly 10. The antenna assembly 10 may be applied to an electronic device 1, where the electronic device 1 includes, but is not limited to, an electronic device 1 having a communication function, such as a mobile phone, an internet device (MID), an electronic book, a Portable Player Station (PSP), or a Personal Digital Assistant (PDA).
Referring to fig. 1, fig. 1 is a schematic diagram of an antenna assembly according to an embodiment of the present application. The antenna assembly 10 includes a first antenna 110, a second antenna 120, and a third antenna 130. The first antenna 110 includes a first radiator 111 and a first signal source 112, the first radiator 111 has a first feeding point P1, and the first signal source 112 is electrically connected to the first feeding point P1, so that the first antenna 110 at least receives and transmits electromagnetic wave signals in a first frequency band. The second antenna 120 includes a second radiator 121 and a second signal source 122, the second radiator 120 is a floating antenna radiator, a first gap 1125 is formed between one end of the second radiator 121 and the first radiator 111, the second radiator 121 is coupled to the first radiator, the second radiator 121 has a second feeding point P2, and the second signal source 122 is electrically connected to the second feeding point P2, so that the second antenna 120 at least receives and transmits electromagnetic wave signals of a second frequency band and a third frequency band, wherein the second frequency band is a GPS-L5 frequency band, and the third frequency band is a GPS-L1 frequency band. The third antenna 130 includes a third radiator 131 and a third signal source 132, and a second slot 1225 is formed between the third radiator 131 and the other end of the second radiator 121 and coupled to each other; the third radiator 131 has a third feeding point P3, and the third signal source 132 is electrically connected to the third feeding point P3, so that the third antenna 130 at least transceives electromagnetic wave signals in a fourth frequency band.
Furthermore, it should be noted that the terms "first", "second", and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing different objects and are not used for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The first radiator 111 is a Flexible Printed Circuit (FPC) antenna radiator, or a Laser Direct Structuring (LDS) antenna radiator, or a Print Direct Structuring (PDS) antenna radiator, or a metal stub; the second radiator 121 is an FPC antenna radiator or an LDS antenna radiator, or a PDS antenna radiator, or a metal stub; the third radiator 131 is an FPC antenna radiator, or an LDS antenna radiator, or a PDS antenna radiator, or a metal stub.
In one embodiment, the first radiator 111, the second radiator 121, and the third radiator 131 are of the same type, so as to facilitate manufacturing. In another embodiment, the first radiator 111, the second radiator 121 and the third radiator 131 are different in type.
The second antenna radiator 121 is a floating antenna radiator, that is, the second antenna radiator 121 does not have a current path directly going down. In other words, the second antenna radiator 121 has no ground terminal directly grounded. The second antenna radiator 121 does not have a current path directly going to the ground, so that the second antenna 120 can realize coverage of more modes (also called modes), and further realize transceiving of electromagnetic wave signals of a wider frequency band. In the present embodiment, it is possible to realize transmission and reception of electromagnetic wave signals in at least the GPS-L5 band and the GPS-L1 band at the same time.
The second antenna radiator 121 does not have a current path directly going down the ground, and the second antenna radiator 121 may go down the ground through other components, such as a frequency selective filter circuit 123 described later. Since there is no direct current path from the bottom to the top on the second antenna radiator 121, the electrical length of the second antenna 120 can be adjusted by setting and selecting the other components, so as to achieve the transceiving of electromagnetic wave signals in a wider frequency band.
A first gap 1125 is formed between one end of the second radiator 121 and the first radiator 111 and coupled to each other, wherein a dimension d of the first gap 11251Comprises the following steps: d is not less than 0.5mm1Less than or equal to 2.0 mm. Referring specifically to FIG. 1, the dimension d is illustrated in FIG. 11. A dimension d of a first gap 1125 between the first radiation and the second radiation body 1211The range is selected so as to ensure a good coupling effect between the first radiator 111 and the second radiator 121. Further optionally, d is 0.5mm ≦ d1Less than or equal to 1.5mm, so that the coupling effect between the first radiator 111 and the second radiator 121 is better.
Due to the mutual coupling between the one end of the second radiator 121 and the first radiator 111, when the antenna assembly 10 is in operation, the first excitation signal generated by the first signal source 112 can be coupled to the second radiator 121 through the first slot 1125. In other words, when the first antenna 110 operates, the first radiator 111 and the second radiator 121 of the second antenna 120 may be used to transceive electromagnetic wave signals, so that the first antenna 110 may operate in a wider frequency band. Likewise, when the antenna assembly 10 operates, the second excitation signal generated by the second signal source 122 may be coupled to the first radiator 111 through the first slot 1125, in other words, when the second antenna 120 operates, the second radiator 121 and the first radiator 111 in the first antenna 110 may be utilized to transmit and receive electromagnetic wave signals, so that the second antenna 120 may operate in a wider frequency band. Since the first antenna 110 can utilize both the first radiator 111 and the second radiator 121 during operation, and the second antenna 120 can utilize both the second radiator 121 and the first radiator 111 during operation, multiplexing of radiators and spatial multiplexing are achieved, which is beneficial to reducing the size of the antenna assembly 10. When the antenna assembly 10 is applied to the electronic device 1, the stacking space for stacking the antenna assembly 10 in the electronic device 1 can be saved.
A second slot 1225 is formed between the other end of the third radiator 131 and the other end of the second radiator 121, and the second slot 1225 is coupled to each other, wherein a dimension d of the second slot 12252Comprises the following steps: d is not less than 0.5mm2Less than or equal to 2.0 mm. Referring specifically to FIG. 1, the dimension d is illustrated in FIG. 12. A dimension d of a second gap 1225 between the third radiator 131 and the second radiator 1212The range is selected so as to ensure a good coupling effect between the third radiator 131 and the second radiator 121. Further optionally, d is 0.5mm ≦ d2Less than or equal to 1.5mm, so that the coupling effect between the third radiator 131 and the second radiator 121 is better. In one embodiment, d2＝d1In other embodiments, d2≠d1。
Due to the mutual coupling between the third radiator 131 and the other end of the second radiator 121, when the antenna assembly 10 is in operation, the second excitation signal generated by the second signal source 122 can be coupled to the third radiator 131 through the second slot 1225. In other words, when the second antenna 120 operates, the electromagnetic wave signals can be transmitted and received by using not only the second radiator 121 but also the third radiator 131 in the third antenna 130, so that the second antenna 120 can operate in a wider frequency band. Likewise, when the antenna assembly 10 operates, the third excitation signal generated by the third signal source 132 may be coupled to the second radiator 121 through the second slot 1225, in other words, when the third antenna 130 operates, the third radiator 131 and the second radiator 121 of the second antenna 120 may be utilized to transceive electromagnetic wave signals, so that the third antenna 130 may operate in a wider frequency band. Since the second antenna 120 can utilize both the second radiator 121 and the third radiator 131 during operation, and the third antenna 130 can utilize both the third radiator 131 and the second radiator 121 during operation, multiplexing of radiators and multiplexing of space are achieved, which is beneficial to reducing the size of the antenna assembly 10. When the antenna assembly 10 is applied to the electronic device 1, the stacking space for stacking the antenna assembly 10 in the electronic device 1 can be saved.
In one embodiment, the first frequency band includes an N78 frequency band (3.3 GHz-3.8 GHz), the second frequency band is a GPS-L5 frequency band, the third frequency band is a GPS-L1 frequency band, and the fourth frequency band is an N77 frequency band. The GPS mentioned herein indicates Positioning, including but not limited to Global Positioning System (GPS) Positioning, beidou Positioning, GLONASS Positioning, GALILEO Positioning, and the like. The central resonance frequency point of the GPS-L5 frequency band is 1176 MHz; the central resonance frequency point of the GPS-L1 frequency band is 1575 MHZ.
In the related art, the second antenna 120 can only receive and transmit electromagnetic wave signals of one frequency band, and if the antenna assembly 10 needs to support electromagnetic wave signals of a second frequency band, an additional antenna needs to be provided to support electromagnetic wave signals of the second frequency band; it can be seen that, in the related art, more antennas are required to support the electromagnetic wave signals of the first frequency band, the second frequency band, the third frequency band and the fourth frequency band, so that the size of the antenna assembly 10 is larger. In the antenna assembly 10 of the present embodiment, there is no need to additionally provide an antenna to support the electromagnetic wave signals of the electromagnetic wave signals in the second frequency band, and therefore, the size of the antenna assembly 10 is small. Providing additional antennas to support electromagnetic wave signals in the second frequency band may also result in higher cost of the antenna assembly 10; the difficulty of stacking the antenna assembly 10 with other devices increases when the antenna assembly 10 is applied in the electronic device 1. In this embodiment, the antenna assembly 10 does not need to additionally provide an antenna to support the electromagnetic wave signal of the second frequency band, so that the cost of the antenna assembly 10 is low; when the antenna module is applied to the electronic device 1, the stacking difficulty is low. In addition, providing additional antennas to support the second band of electromagnetic wave signals may also result in increased radio frequency link insertion loss for the antenna assembly 10. In the antenna assembly 10 provided by the present application, the second antenna 120 can receive and transmit electromagnetic wave signals in the second frequency band and electromagnetic wave signals in the third frequency band, so that the insertion loss of the radio frequency link can be reduced.
In addition, the antenna assembly 10 provided in the present embodiment may utilize fewer radiators to implement the transceiving of the electromagnetic wave signal in the first frequency band, the electromagnetic wave signal in the second frequency band, the electromagnetic wave signal in the third frequency band, and the electromagnetic wave signal in the fourth frequency band, thereby implementing the coverage of a wider frequency band, and therefore, the antenna assembly 10 has a better communication effect.
Referring to fig. 1, the second radiator 121 has a first connection point T1, and the first connection point T1 is separated from the second slot 1225 compared to the second feeding point P2. The second antenna 120 further includes a frequency-selective filter circuit 123, one end of the frequency-selective filter circuit 123 is electrically connected to the first connection point T1, and the other end is grounded, and the frequency-selective filter circuit 123 is configured to adjust an electrical length of the second antenna 120.
Referring to fig. 2, fig. 2 is a schematic diagram of a frequency-selective filter circuit according to an embodiment of the present disclosure. The frequency-selective filter circuit 123 includes a first capacitor C1, a first inductor L1, and a second inductor L2. One end of the first capacitor C1 is grounded. One end of the first inductor L1 is electrically connected to the other end of the first capacitor C1, and the other end of the first inductor L1 is electrically connected to the first connection point T1. One end of the second inductor L2 is grounded, and the other end of the second inductor L2 is electrically connected to the first connection point T1.
The parameters of the first capacitor C1, the first inductor L1, and the second inductor L2 may be selected according to the frequency band in which the second antenna 120 operates, so that different frequency bands in which the second antenna 120 operates exhibit different electrical lengths, thereby exciting modes of the antenna in different frequency bands. The mode corresponding to the frequency band transceived by the second antenna 120 will be described later with reference to a simulation diagram. In one embodiment, the first inductance L1 is 3.9nH, the first capacitance C1 is 2.4Pf, and the second inductance L2 is 2.5 nH. The above structure and parameters of the frequency-selective filter circuit 123 make the equivalent of 7.6nH inductance when receiving and transmitting the electromagnetic wave signal with the second frequency band being the GPS-L5 frequency band, and make the equivalent of 24.76pF capacitance when receiving and transmitting the electromagnetic wave signal with the third frequency band being the GPS-L1 frequency band.
The above structure and parameters in the frequency selective filter circuit 123 make the equivalent of 1.2nH inductance when receiving and transmitting the electromagnetic wave signal of which the sixth frequency band (see fig. 7 and the related description thereof) is the WiFi 2.4G frequency band, and make the equivalent of 1.5nH inductance when receiving and transmitting the electromagnetic wave signal of which the seventh frequency band (see fig. 7 and the related description thereof) is the WiFi 5G frequency band.
Referring to fig. 3, fig. 3 is a schematic diagram of an antenna assembly according to another embodiment of the present application. The second radiator 121 further has a second connection point T2, the second connection point T2 is spaced apart from the first connection point T1, and the second antenna 120 further includes an isolation circuit 124. One end of the isolation circuit 124 is electrically connected to the second connection point T2, and the other end is grounded, and the isolation circuit 124 is used for isolating the first frequency band from the fourth frequency band.
Referring to fig. 4, fig. 4 is a schematic diagram of the isolation circuit shown in fig. 3. The isolation circuit 124 includes a bandpass filter circuit composed of an inductor L21 and a capacitor C21. The second radiator 121 is electrically connected to ground through the second connection point T2 and the second isolation circuit 124, so that the isolation of the electromagnetic wave signal of the first frequency band generated by the first antenna 110 and the electromagnetic wave signal of the fourth frequency band generated by the third antenna 130 can be improved. Specifically, when the first antenna 110 receives and transmits electromagnetic wave signals in a first frequency band, due to the coupling effect between the first radiator 111 and the second radiator 121, the first excitation signal generated by the first signal source 112 is coupled from the first radiator 111 to the second radiator 121, and is transmitted from the second connection point T2 and the isolation circuit 124 to ground (also referred to as a ground pole), but is not transmitted to the end of the second radiator 121 that is away from the first slot 1125 from the second connection point T2, so that the coupling to the third radiator 131 is avoided, and the fourth frequency band received and transmitted by the third antenna 130 is further avoided from being affected. Accordingly, when the third antenna 130 receives and transmits electromagnetic wave signals in a third frequency band, due to the coupling effect between the third radiator 131 and the second radiator 121, the first excitation signal generated by the third signal source 132 is coupled from the third radiator 131 to the second radiator 121 and is transmitted to the ground from the second connection point T2 and the second isolation circuit 124, so that the first excitation signal is not transmitted to the second radiator 121 from the second connection point T2 to the end adjacent to the first slot 1125, and therefore, the first excitation signal is prevented from being coupled to the first radiator 111, and the first frequency band received and transmitted by the first antenna 110 is prevented from being affected. It can be seen that the isolation circuit 124 functions to transmit the excitation signal transmitted to the isolation circuit 124 to the ground, and therefore, such a structure of the isolation circuit 124 is added to be also referred to as a notch structure.
With continued reference to fig. 3, the second connection point T2 is disposed on a side of the first connection point T1 away from the second feeding point P2.
The second connection point T2 is disposed at a side of the first connection point T1 away from the second feeding point P2, so that the disposition of the isolation circuit 124 has no or little influence on the transceiving of electromagnetic wave signals by the second antenna 120. Specifically, when the second antenna 120 transmits and receives electromagnetic wave signals (including but not limited to electromagnetic wave signals in the second frequency band and the third frequency band), the distance from the first connection point T1 to the end adjacent to the second slot 1225 on the second radiator 121 is a major part of the distance from the second antenna 120 to the end adjacent to the second slot 1225 when the second antenna 120 transmits and receives electromagnetic wave signals, and the second excitation signal generated by the second signal source 122 is mainly distributed on the second radiator 121 from the first connection point T1 to the end adjacent to the second slot 1225. If the second connection point T2 is disposed at any position on the second radiator 121 from the first connection point T1 to one end of the second slot 1225, the second excitation signal generated by the second signal source 122 is transmitted to the ground through the second connection point T2 and the isolation circuit 124, so that the current distribution of the second excitation signal on the second radiator 121 is damaged, and the electromagnetic wave signal transmitted and received by the second antenna 120 is affected. In this embodiment, the second connection point T2 is disposed on a side of the first connection point T1 away from the second feeding point P2, so that the isolation circuit 124 is disposed outside a portion of the second radiator 121 where the second excitation signal is mainly distributed, and therefore, the current distribution of the second excitation signal on the second radiator 121 is small or even not damaged, and the electromagnetic wave signal received and transmitted by the second antenna 120 is slightly affected or even not affected.
Referring to fig. 3 and 5 together, fig. 5 is a schematic diagram illustrating an RL curve of the first antenna in the antenna assembly shown in fig. 3. The RL curve is a Return Loss curve, which is called Return Loss, and is abbreviated as RL. In fig. 14, the abscissa is frequency in GHz; the ordinate is the return loss in dB. The first radiator 111 further has a first ground 1111 facing away from the first slot 1125, and the first ground 1111 is grounded. The first antenna 110 has at least a first resonant mode (labeled mode 1 in the figure) and a second resonant mode (labeled mode 2 in the figure). The first resonance mode is used for supporting transceiving of electromagnetic wave signals of the first frequency band, wherein the first resonance mode is 1/8-1/4 wavelength mode from the first ground 1111 to the first slot 1125. The second resonance mode is used to enable the first antenna 110 to support transceiving of electromagnetic wave signals in a fifth frequency band, where the second resonance mode is an 1/4 wavelength mode from the first ground terminal 1111 to the first slot 1125.
The resonant mode is also called a resonant mode. The first resonant mode is a 1/8-1/4 wavelength mode from the first ground 1111 to the first slot 1125, which means that when the first antenna 110 receives and transmits the electromagnetic wave signals of the first frequency band, the first ground 1111 to the first radiator 111 are mainly used to receive and transmit the electromagnetic wave signals of the first frequency band at a portion adjacent to the end of the first slot 1125. The second resonant mode is a 1/4 wavelength mode from the first ground terminal 1111 to the first slot 1125, which means that when the first antenna 110 receives and transmits the electromagnetic wave signals of the fifth frequency band, the first ground terminal 1111 to the first radiator 111 adjacent to the end of the first slot 1125 are mainly used to receive and transmit the electromagnetic wave signals of the fifth frequency band.
In this embodiment, the first frequency band includes an N78 frequency band (3.3GHz to 3.8GHz), and the fifth frequency band is an MHB frequency band. The MHB Band is a medium-High frequency (Middle High Band) Band, and the frequency Band ranges from 1000MHz to 3000 MHz.
It should be noted that the first antenna 110 at least has the first resonance mode and the second resonance mode, which means that the first antenna 110 at least has the first resonance mode and the second resonance mode at the same time, and therefore, the first antenna 110 supports the transmission and reception of the electromagnetic wave signal of the first frequency band and the electromagnetic wave signal of the fifth frequency band at the same time.
Referring to fig. 1, fig. 3 and fig. 6 together, fig. 6 is a schematic diagram of a first matching circuit according to an embodiment of the present disclosure. The first antenna 110 further includes a first matching circuit M1, and the first matching circuit M1 is electrically connected between the first signal source 112 and the first feeding point P1. The specific structure of the first matching circuit M1 according to an embodiment of the present invention will be described in detail below with reference to fig. 6. The first matching circuit M1 includes a capacitive coupling unit 1131 and a first tuning unit 1132. The capacitive coupling element 1131 is electrically connected between the first signal source 112 and the first feeding point P1, so that the first signal source 112 is capacitively coupled and fed to the first feeding point P1 through the capacitive coupling element 1131. The first tuning unit 1132 is electrically connected to the capacitive coupling unit 1131, and is configured to adjust a resonant frequency point of the electromagnetic wave signal in the first frequency band and the electromagnetic wave signal in the fifth frequency band.
Specifically, in this embodiment, the capacitive coupling unit 1131 includes a second capacitor C2 and a third capacitor C3. One end of the second capacitor C2 is electrically connected to the first feeding point P1, and the other end is electrically connected to the third capacitor C3 to the first signal source 112. The first tuning unit 1132 includes a fourth capacitor C4 and a third inductor L3. One end of the fourth capacitor C4 is grounded, and the other end is electrically connected to the first feeding point P1; one end of the third inductor L3 is grounded, and the other end is electrically connected to the connection point of the second capacitor C2 and the third capacitor C3.
Referring to fig. 3 and 7 together, fig. 7 is a schematic diagram illustrating an RL curve of a second antenna of the antenna assembly shown in fig. 3. The RL curve is a Return Loss curve, which is called Return Loss, and is abbreviated as RL. In fig. 7, the abscissa is frequency in GHz; the ordinate is RL in dB. The second antenna 120 has at least a third resonant mode, a fourth resonant mode, a fifth resonant mode, and a sixth resonant mode. The third resonant mode (marked as mode 3 in the figure) is used to support transceiving of the electromagnetic wave signal of the second frequency band, where the third resonant mode is an 1/4 wavelength mode from the ground electrode electrically connected to the frequency-selective filter circuit 123 to the second slot 1225. The fourth resonance mode (marked as mode 4 in the figure) is used for supporting the transceiving of the electromagnetic wave signal of the third frequency band, wherein the fourth resonance mode is an 1/4 wavelength mode from the ground electrode electrically connected to the frequency-selective filter circuit 123 to the second slot 1225. The fifth resonance mode (marked as mode 5 in the figure) is used for supporting the transceiving of the electromagnetic wave signal of the sixth frequency band, wherein the 1/4 wavelength mode from the second signal source 122 to the first slot 1125. The sixth resonant mode (marked as mode 6 in the figure) is used for supporting the transceiving of the electromagnetic wave signal of the seventh frequency band, wherein the sixth resonant mode is an 1/4 wavelength mode from the second signal source 122 to the second slot 1225.
In this embodiment, the second frequency band is a GPS-L5 frequency band, the third frequency band is a GPS-L1 frequency band, the sixth frequency band is a WiFi 2.4G frequency band, and the seventh frequency band is an MHB frequency band. The range of the WIFI 2.4G frequency band is 2.4 GHz-2.5 GHz.
Referring to fig. 3 and 8 together, fig. 8 is a schematic diagram of a second matching circuit according to an embodiment of the present disclosure. The second antenna 120 further includes a second matching circuit M2, and the second matching circuit M2 is electrically connected between the second signal source 122 and the second feeding point P2. The specific structure of the second matching circuit M2 according to an embodiment of the present invention will be described in detail below with reference to fig. 8. The second matching circuit M2 includes a second tuning unit 1251, a first band stop unit 1252, and a first filtering unit 1253. The second tuning unit 1251 is electrically connected to the second signal source 122 for impedance tuning. One end of the first strip blocking unit 1252 is electrically connected to the second tuning unit 1251, and the other end is electrically connected to the second feeding point P2, and the first strip blocking unit 1252 is configured to isolate the electromagnetic wave signal of at least a partial frequency band transmitted and received by the third antenna 130. The first filtering unit 1253 is configured to filter out a high-frequency electromagnetic wave signal.
Specifically, in this embodiment, the second tuning unit 1251 includes a fifth capacitor C5, a sixth capacitor C6 and a fourth inductor L4. One end of the fifth capacitor C5 is grounded, the other end of the fifth capacitor C5 is electrically connected to one end of the sixth capacitor C6, one end of the sixth capacitor C6 is electrically connected to the first signal source 112, one end of the fourth inductor L4 is grounded, and the other end of the fourth inductor L4 is electrically connected to the other end of the fifth capacitor C5. The first bandgap cell 1252 comprises a seventh capacitor C7 and a fifth inductor L5. One end of the seventh capacitor C7 is electrically connected to the other end of the fifth capacitor C5, the other end of the seventh capacitor C7 is electrically connected to the second feeding point P2, and the fifth inductor L5 is connected in parallel with the seventh capacitor C7. The first filter unit 1253 includes an eighth capacitor C8, one end of the eighth capacitor C8 is grounded, and the other end is electrically connected to the second feeding point P2.
In the present embodiment, the first band stop unit 1252 is used to form a band stop circuit including an electromagnetic wave signal of a fourth frequency band (in the present embodiment, N78 frequency band). The first filtering unit 1253 is configured to filter out a high-frequency electromagnetic wave signal, and as shown in fig. 19, the first filtering unit 1253 is configured to filter out an electromagnetic wave signal higher than 3.0 GHz.
Referring to fig. 3 and 9 together, fig. 9 is a schematic diagram illustrating an RL curve of a third antenna of the antenna assembly shown in fig. 3. In the schematic diagram of the present embodiment, the abscissa is frequency, and the unit is GHz; the ordinate is RL in dB. The second radiator 121 further has a second ground terminal 1131 away from the second slot 1225, and the second ground terminal 1131 is grounded. The third antenna 130 has at least a seventh resonant mode, an eighth resonant mode, a ninth resonant mode, and a fourth resonant mode. The seventh resonant mode is 1/8-1/4 wavelength modes from the second ground 1131 to the second slot 1225.
The eighth resonance mode is an 1/2 wavelength resonance mode of the first gap 1125 to the second gap 1225.
The ninth resonant frequency band is the 1/4 wavelength mode from the second ground 1131 to the second slot 1225.
The tenth resonant frequency band is an 3/4 wavelength mode from the ground electrode electrically connected to the frequency-selective filter circuit 123 to the second slot 1225.
The seventh resonance mode, the eighth resonance mode, the ninth resonance mode, and the tenth resonance mode are commonly used to support the transmission and reception of electromagnetic wave signals in the fourth frequency band, the eighth frequency band, the ninth frequency band, and the tenth frequency band. The fourth frequency band is an N78 frequency band, the eighth frequency band is an N77 frequency band, the ninth frequency band is an N79 frequency band, and the tenth frequency band is a WiFi 5G frequency band. As can be seen from fig. 9, the seventh resonance mode, the eighth resonance mode, the ninth resonance mode, and the tenth resonance mode cover 3.0G to 7.0GHz, and thus include an N78 frequency band (3.3GHz to 3.8GHz), an N77 frequency band (3.3GHz to 4.2GHz), an N79 frequency band (4.4GHz to 5.0GHz), and a WiFi 5G frequency band (5.725GHz to 5.825 GHz).
It should be noted that the description of each of the first resonant mode to the tenth resonant mode is for illustrating the main characteristic representation of each mode, and when each mode operates, the first antenna 110, the second antenna 120, and the third antenna 130 in the antenna assembly 10 are not independent from each other, and because there is coupling between the first radiator 111 and the second radiator 121, there is coupling between the second radiator 121 and the third radiator 131, and the first excitation signal flows to the second radiator 121 through the coupling between the first radiator 111 and the second radiator 121, except for being distributed on the first radiator 111. Accordingly, the second excitation signal flows to the first radiator 111 through coupling between the second radiator 121 and the first radiator 111 and flows to the third radiator 131 through coupling between the second radiator 121 and the third radiator 131, in addition to being distributed on the second radiator 121. The third driving signal flows to the second radiator 121 through the coupling between the third radiator 131 and the second radiator 121, in addition to being distributed on the third radiator 131. The coupling among the first radiator 111, the second radiator 121, and the third radiator 131 does not affect the description of the main appearance of each of the first to tenth resonance modes.
Referring to fig. 3 and 10 together, fig. 10 is a schematic diagram of a third matching circuit according to an embodiment of the present disclosure. The third matching circuit M3 is electrically connected between the third signal source 132 and the third feeding point P3. A specific structure of the third matching circuit M3 according to an embodiment of the present invention will be described in detail with reference to fig. 10. The third antenna 130 further comprises a third matching circuit M3, the third matching circuit M3 comprising a third tuning unit 1331, a second band stop unit 1332 and a second filtering unit 1333. The third tuning unit 1331 is electrically connected to the third signal source 132 for impedance tuning. One end of the second band elimination unit 1332 is electrically connected to the third tuning unit 1331, and the other end is electrically connected to the third feeding point P3, and the second band elimination unit 1332 is used for isolating electromagnetic wave signals of at least partial frequency band transceived by the second antenna 120. The second filtering unit 1333 is used for filtering the low-frequency electromagnetic wave signal.
In the present embodiment, the second band elimination unit 1332 is used to form a band elimination circuit including an electromagnetic wave signal of the sixth frequency band (in the present embodiment, the WiFi 2.4G frequency band). The second filtering unit 1333 is configured to filter low-frequency electromagnetic wave signals, and as shown in fig. 19, the second filtering unit 1333 is configured to filter electromagnetic wave signals below 3.0 GHz.
Referring to fig. 10, the third tuning unit 1331 includes a ninth capacitor C9 and a sixth inductor L6. One end of the ninth capacitor C9 is grounded, the other end of the ninth capacitor C9 is electrically connected to one end of the sixth inductor L6, and the other end of the sixth inductor L6 is electrically connected to the third feeding point P3.
The second band elimination unit 1332 includes a tenth capacitor C10 and a seventh inductor L7. One end of the tenth capacitor C10 is electrically connected to the other end of the ninth capacitor C9, the other end of the tenth capacitor C10 is electrically connected to the third feeding point P3, and the seventh inductor L7 is connected in parallel with the tenth capacitor C10.
The second filtering unit 1333 includes an eighth inductor L8, one end of the eighth inductor L8 is grounded, and the other end is electrically connected to the third feeding point P3.
Referring to fig. 11 to 18 together, fig. 11 to 18 are schematic diagrams of sub-matching circuits according to various embodiments, respectively. The first matching circuit M1 includes one or more sub-matching circuits 12a, and the second matching circuit M2 includes one or more sub-matching circuits 12 a.
In fig. 11, the sub-matching circuit 12a includes a band-pass circuit formed by a matching inductor L30 and the matching capacitor C30 connected in series.
In fig. 12, the sub-matching circuit 12a includes a band-stop circuit formed by a matching inductor L30 in parallel with a matching capacitor C30.
In fig. 13, the sub-matching circuit 12a includes a matching inductor L30, a first matching capacitor C31, and a second matching capacitor C32. The matching inductor L30 is connected in parallel with the first matching capacitor C31, and the second matching capacitor C32 is electrically connected to a node where the matching inductor L30 is electrically connected with the first matching capacitor C31.
In fig. 14, the sub-matching circuit 12a includes a matching capacitor C30, a first matching inductor L31, and a second matching inductor L32. The matching capacitor C30 is connected in parallel with the first matching inductor L31, and the second matching inductor L32 is electrically connected to a node where the matching capacitor C20 is electrically connected to the first matching inductor L31.
In fig. 15, the sub-matching circuit 12a includes a matching inductor L30, a first matching capacitor C31, and a second matching capacitor C32. The matching inductor L30 is connected in series with the first matching capacitor C31, one end of the second matching capacitor C32 is electrically connected to the first end of the matching inductor L30, which is not connected to the first matching capacitor C31, and the other end of the second matching capacitor C32 is electrically connected to the end of the first matching capacitor C31, which is not connected to the matching inductor L30.
In fig. 16, the sub-matching circuit 12a includes a matching capacitor C30, a first matching inductor L31, and a second matching inductor L32, the matching capacitor C30 is connected in series with the first matching inductor L31, one end of the second matching inductor L32 is electrically connected to the end of the matching capacitor C30 not connected to the first matching inductor L31, and the other end of the second matching inductor L32 is electrically connected to the end of the first matching inductor L31 not connected to the matching capacitor C30.
In fig. 17, the sub-matching circuit 12a includes a first matching capacitor C31, a second matching capacitor C32, a first matching inductor L31, and a second matching inductor L32. The first matching capacitor C31 is connected in parallel with the first matching inductor L31, the second matching capacitor C32 is connected in parallel with the second matching inductor L32, and one end of the whole formed by connecting the second matching capacitor C32 and the second matching inductor L32 in parallel is electrically connected to one end of the whole formed by connecting the first matching capacitor C31 and the first matching inductor L31 in parallel.
In fig. 18, the sub-matching circuit 12a includes a first matching capacitor C31, a second matching capacitor C32, a first matching inductor L31, and a second matching inductor L32. The first matching capacitor C31 is connected in series with the first matching inductor L31 to form a first cell 12b, the second matching capacitor C32 is connected in series with the second matching inductor L32 to form a second cell 12C, and the first cell 12b is connected in parallel with the second cell 12C.
Referring to fig. 3, 19 and 20 together, fig. 19 is a schematic diagram illustrating return loss curves of a first antenna, a second antenna and a third antenna in an antenna assembly provided by the present application; fig. 20 is a schematic diagram illustrating isolation curves of a first antenna, a second antenna, and a third antenna in an antenna assembly provided herein. In fig. 19, the abscissa is frequency in GHz; the ordinate is RL in dB. In fig. 19, a curve (i.e., S1,1 curve in the figure) is an RL curve of the first antenna 110, a curve (i.e., S2,2 curve in the figure) is an RL curve of the second antenna 120, and a curve (i.e., S3,3 curve in the figure) is an RL curve of the third antenna 130. As can be seen from fig. 19, the first antenna 110 of the present application supports the MHB band and the N78 band; the second antenna 120 supports a GPS-L5 frequency band, a GPS-L1 frequency band, a WiFi 2.4G frequency band, an LTE-MHB frequency band and an NR-MHB frequency band; the third antenna 130 supports N77 band, N78 band, N79 band, and WiFi 5G band. Therefore, the antenna assembly 10 of the present application can cover more frequency bands and has a wider bandwidth.
In fig. 20, the abscissa is frequency in GHz; the ordinate is the isolation in dB. In fig. 20, a curve (i.e., a curve S2, 1) is a graph illustrating the isolation between the first antenna 110 and the second antenna 120, and it can be seen from the curve (i), the first antenna 110 and the second antenna 120 have better isolation. Curve (i.e., S3, curve 1) is a schematic diagram of the isolation curve between the third antenna 130 and the first antenna 110, and it can be seen from curve (v) that the first antenna 110 and the third antenna 130 have better isolation therebetween. A curve (i.e., the curve S3, 2) is a schematic diagram of the isolation between the second antenna 120 and the third antenna 130, and it can be seen from the curve that the second antenna 120 and the third antenna 130 have better isolation therebetween.
Referring to fig. 21, fig. 21 is a schematic view of an antenna element according to another embodiment of the present application. The antenna assembly 10 also includes a first isolation capacitor C50 and a proximity sensor 140. The first isolation capacitor C50 is electrically connected to any one of the first radiator 111, the second radiator 121, and the third radiator 131. The proximity sensor 140 is electrically connected to the radiator to which the first isolation capacitor C50 is electrically connected to detect whether a target object is proximate to the antenna assembly 10.
The target object may be, but is not limited to, a human being, such as a user of the electronic device 1 using the antenna assembly 10. When the proximity sensor 140 detects whether a target object is close to the antenna assembly 10, a suspended conductive plate is required, and the conductive plate may be a metal conductive plate or a non-metal conductive plate. The first isolation capacitor C50 is electrically connected to any one of the first radiator 111, the second radiator 121 and the third radiator 131, so that the radiator electrically connected to the first isolation capacitor C50 is suspended to form a suspended conductive plate.
In the schematic diagram of the present embodiment, it is illustrated that the first isolation capacitor C50 is electrically connected to the second radiator 121, and in the present embodiment, the first isolation capacitor C50 includes a first sub-isolation capacitor C51, a second sub-isolation capacitor C52, and a third sub-isolation capacitor C53. One end of the first sub-isolation capacitor C51 is electrically connected to the isolation circuit 124, and the other end is electrically connected to the first connection point T1. One end of the second sub-isolation capacitor C52 is electrically connected to the frequency-selective filter circuit 123, and the other end is electrically connected to the first connection point T1. One end of the third sub-isolation capacitor C53 is electrically connected to the second matching circuit M2, and the other end is electrically connected to the second feeding point P2. The proximity sensor 140 is electrically connected to a radiator to which the first isolation capacitor C50 is electrically connected, and in this embodiment, the proximity sensor 140 is electrically connected to the second radiator 121. Specifically, in the present embodiment, the proximity sensor 140 is electrically connected to the second connection point T2. It is understood that, in other embodiments, the proximity sensor 140 is electrically connected to the first connection point T1, or the proximity sensor 140 is electrically connected to the second connection point T2, or the proximity sensor 140 is electrically connected to another position of the second radiator 121, as long as the proximity sensor 140 is electrically connected to the second radiator 121.
In one embodiment, the capacitance value of the first sub-isolation capacitor C51 is 22pF, the capacitance value of the second sub-isolation capacitor C52 is 22pF, and the capacitance value of the third sub-isolation capacitor C53 is 22 pF. The capacitance values of the first sub-isolation capacitor C51, the second sub-isolation capacitor C52 and the third sub-isolation capacitor C53 are small, and have no influence on the transmission and reception of electromagnetic wave signals by the antenna assembly 10.
Referring to fig. 22 and 23, fig. 22 is a schematic diagram illustrating the distribution of electric field lines when the target object is not close to the antenna assembly; fig. 23 is a schematic diagram of the distribution of electric field lines when a target object is close to an antenna assembly. The suspended conductive plate may enable the proximity sensor 140 to detect changes in capacitance caused by the proximity of a target object to the antenna assembly 10. In fig. 23, the target object is illustrated as a finger of the user, and it is understood that in other embodiments, the target object may be, but is not limited to, other parts on the user, such as the head. Capacitance value C in fig. 22sensor＝CEnv(ii) a Capacitance value C in fig. 23sensor＝CEnv+Cuser. Wherein, CEnvIs the original capacitance value, CuserIs the change in capacitance when the target object is in close proximity to the antenna assembly 10. It can be seen that the antenna assembly 10 achieves the technical effect of detecting whether a target object is proximate to the antenna assembly 10.
Referring further to fig. 21, the antenna assembly 10 further includes a first isolation inductor L50. The first isolation inductor L50 is electrically connected between the radiator electrically connected to the first isolation capacitor C50 and the proximity sensor 140, and is used for isolating interference of electromagnetic wave signals transceived by the antenna assembly 10 with detection signals for detecting the proximity of the target object to the antenna assembly 10.
In this embodiment, the first isolation capacitor C50 is electrically connected to the second radiator 121, and the first isolation inductor L50 is electrically connected between the second radiator 121 and the proximity sensor 140. Specifically, in the present embodiment, the first isolation inductor L50 is electrically connected to the second feeding point P2 and the proximity sensor 140, and it is understood that in other embodiments, the first isolation inductor L50 is electrically connected between any position of the second radiator 121 and the proximity sensor 140. The inductance of the first isolation inductor L50 may be, but is not limited to, 82 nH. The inductance of the first isolating inductor L50 is small, and has substantially no effect on the transmission and reception of electromagnetic wave signals by the antenna assembly 10.
The first isolation capacitor C50 is electrically connected to the radiator and the proximity sensor 140 to form a detection path of a channel, so that the antenna assembly 10 detects whether the target object is in proximity to the antenna assembly 10.
Referring to fig. 24, fig. 24 is a schematic view of an antenna element according to still another embodiment of the present application. In this embodiment, the antenna assembly 10 includes a first isolation capacitor C50 and a first isolation inductor L50, and the first isolation capacitor C50 and the first isolation inductor L50 refer to the foregoing description, which is not repeated herein. In this embodiment, the antenna assembly 10 further includes a second isolation capacitor C60. The second isolation capacitor C60 is electrically connected to any one of the first radiator 111, the second radiator 121 and the third radiator 131, and the second isolation capacitor C60 and the first isolation capacitor C50 are electrically connected to different radiators. Isolation capacitance the proximity sensor 140 is also electrically connected to a radiator to which the second isolation capacitance C60 is electrically connected.
The second isolation capacitor C60 is electrically connected to any one of the first radiator 111, the second radiator 121 and the third radiator 131, so that the radiator electrically connected to the second isolation capacitor C60 is formed as a floating conductive plate. In this embodiment, the second isolation capacitor C60 is electrically connected to the third radiator 131. In this embodiment, the second isolation capacitor C60 includes a fourth sub-isolation capacitor C61 and a fifth sub-isolation capacitor C62, and the second isolation capacitor C60 is electrically connected to the third radiator 131 for illustration. One end of the fourth sub-isolation capacitor C61 is electrically connected to the third signal source 132, and the other end is electrically connected to the third feeding point P3. One end of the fifth sub-isolation capacitor C62 is electrically connected to the third radiator 131, and the other end is electrically connected to ground through a fourth matching circuit M4.
In this embodiment, the antenna assembly 10 further includes a second isolation inductance L60. The second isolation inductor L60 is electrically connected between the second isolation capacitor C60 and the proximity sensor 140, and is used for isolating interference of electromagnetic wave signals transceived by the antenna assembly 10 with detection signals for detecting the proximity of the target object to the antenna assembly 10.
In this embodiment, the second isolation capacitor C60 is electrically connected to the third radiator 131, and the second isolation inductor L60 is electrically connected between the third radiator 131 and the proximity sensor 140. Specifically, in the present embodiment, the second isolation inductor L60 is electrically connected to the third feeding point P3 and the proximity sensor 140, and it is understood that in other embodiments, the second isolation inductor L60 is electrically connected between the third radiator 131 and the proximity sensor 140. The second isolation inductor L60 is used to isolate the interference of the electromagnetic wave signals transmitted and received by the antenna assembly 10 with the detection signals for detecting the proximity of the target object to the antenna assembly 10.
The first isolation capacitor C50 and the second dc blocking capacitor C60 are electrically connected to the radiator and the proximity sensor 140, so as to form a two-channel detection path, thereby expanding the detection range of the antenna assembly 10 when detecting whether the target object is close to the antenna assembly 10. The inductance of the second isolation inductor L60 may be, but is not limited to, 82 nH. The inductance of the second isolation inductor L60 is small, and has substantially no effect on the transmission and reception of electromagnetic wave signals by the antenna assembly 10.
Referring to fig. 25, fig. 25 is a schematic view of an antenna element according to yet another embodiment of the present application. In this embodiment, the antenna assembly 10 includes a first isolation capacitor C50, a first isolation inductor L50, a second isolation capacitor C60, and a second isolation inductor L60, and the first isolation capacitor C50, the first isolation inductor L50, the second isolation capacitor C60, and the second isolation inductor L60 refer to the foregoing description, which is not repeated herein. In this embodiment, the antenna assembly 10 further includes a third isolation capacitor C70 and a third isolation inductor L70. The third isolation capacitor C70 is electrically connected to the first radiator 111, so that the first radiator 111 electrically connected to the third isolation capacitor C70 is formed as a floating conductive plate. In this embodiment, the third isolation capacitor C70 is electrically connected to the third radiator 131, and for convenience of illustration, one end of the third dc-blocking capacitor C70 is electrically connected to the first matching circuit M1, and the other end is electrically connected to the first feeding point P1. The third isolation inductor L70 is electrically connected between the first radiator 111 and the proximity sensor 140. The third isolation inductor L70 is used to isolate the interference of the electromagnetic wave signals transmitted and received by the antenna with the detection signals for detecting the proximity of the target object to the antenna assembly 10.
The first isolation capacitor C50, the second isolation capacitor C60, and the third isolation capacitor C70 are electrically connected to the radiator and the proximity sensor 140, so as to form a three-channel detection path, which further expands the detection range of the antenna assembly 10 when detecting whether the target object is close to the antenna assembly 10. The inductance of the third isolation inductor L70 may be, but is not limited to, 82 nH. The inductance of the second isolation inductor L60 is small, and has substantially no effect on the transmission and reception of electromagnetic wave signals by the antenna assembly 10.
It is to be understood that, when the antenna assembly 10 includes a detection path with three channels, a switch unit may be disposed in the three channels, and the controller 150 controls the switch unit to open and close, so that the controller 150 selects one channel, two channels, or three channels of the three channels.
Referring to fig. 26, fig. 26 is a schematic circuit structure diagram of an antenna element according to an embodiment of the present application. The antenna assembly 10 includes the antenna assembly 10 of any of the preceding embodiments, and the antenna assembly 10 further includes a controller 150. The controller 150 is configured to reduce the transmit and receive power of the antenna assembly 10 when a target object is proximate to the antenna assembly 10.
Specifically, when the target object is not close to the antenna assembly 10, the antenna assembly 10 transceives electromagnetic wave signals with a first transceiving power; when the target object is in proximity to the antenna assembly 10, the controller 150 controls the antenna assembly 10 to transceive electromagnetic wave signals at a second transceive power, wherein the second transceive power is less than the first transceive power.
When the target object approaches the antenna assembly 10, the controller 150 reduces the transceiving power of the antenna assembly 10, so as to reduce an Absorption Rate (SAR) of the target object to the electromagnetic wave signals transceived by the antenna assembly 10, thereby improving the safety of the user using the electronic device 1 to which the antenna assembly 10 is applied.
Specifically, the proximity sensor 140 detects a change in capacitance value caused when a target object approaches the antenna assembly 10, and the controller 150 determines whether the target object approaches the antenna assembly 10 according to the capacitance value detected by the proximity sensor 140. When the target object approaches the antenna assembly 10, the transceiving power of the antenna assembly 10 for transceiving the electromagnetic wave signal is reduced.
In the schematic diagram of the present embodiment, the antenna assembly 10 further includes a controller 150 incorporated into the antenna assembly 10 shown in fig. 21 as an example, and it is understood that the antenna assembly 10 further includes a controller 150 incorporated into the antenna assembly 10
Fig. 27 and 28 are combined, and fig. 27 is a perspective structural view of an electronic device 1 according to an embodiment of the present application; FIG. 28 is a cross-sectional view taken along line I-I of FIG. 27, according to one embodiment. The electronic device 1 includes the antenna assembly 10 provided in any of the foregoing embodiments, and please refer to the foregoing description for the antenna assembly 10, which is not described herein again.
In the present embodiment, the electronic device 1 includes a middle frame 30, a screen 40, a circuit board 50, and a battery cover 60. The middle frame 30 is made of metal, such as aluminum magnesium alloy. The middle frame 30 generally forms a ground of the electronic device 1, and when the electronic devices in the electronic device 1 need to be grounded, the middle frame 30 can be connected to the ground. The middle frame 30 includes a main body 310 and a rim 320 bent and connected to a periphery of the main body 310, and any one of the first radiator 111, the second radiator 121, and the third radiator 131 may be formed on the rim 320. The screen 40 may be a display screen with a display function, or may be a screen 40 integrated with a display function and a touch function. The screen 40 is used for displaying information such as text, images, video, and the like. The screen 40 is supported by the middle frame 30 and is located at one side of the middle frame 30. The circuit board 50 is also generally carried by the middle frame 30, and the circuit board 50 and the screen 40 are carried by opposite sides of the middle frame 30. At least one or more of the first signal source 112, the second signal source 122, the third signal source 132, the first matching circuit M1, the second matching circuit M2, the third matching circuit M3, the fourth matching circuit M4, the frequency-selective filter circuit 123, and the isolation circuit 124 of the antenna assembly 10 described above may be disposed on the circuit board 50. The battery cover 60 is disposed on a side of the circuit board 50 away from the middle frame 30, and the battery cover 60, the middle frame 30, the circuit board 50, and the screen 40 cooperate with each other to form a complete electronic device 1. It should be understood that the structural description of the electronic device 1 is merely a description of one form of the structure of the electronic device 1, and should not be understood as a limitation on the electronic device 1, nor should it be understood as a limitation on the antenna assembly 10.
Referring to fig. 29, fig. 29 is a schematic view of an electronic device according to an embodiment of the present application. The electronic device 1 has a first side 11, a second side 12, a third side 13 and a fourth side 14 which are connected end to end in sequence. First limit 11 with third limit 13 sets up relatively, second limit 12 with fourth limit 14 sets up relatively, the length of first limit 11 is less than the length of second limit 12, first radiator 111 with a part of second radiator 121 corresponds first limit 11 sets up, another part of second radiator 121 with third radiator 131 corresponds second limit 12 sets up. The length of the first side 11 is smaller than the length of the second side 12, in other words, the first side 11 is a short side and the second side 12 is a long side. In the present embodiment, the first side 11 and the third side 13 are short sides of the electronic device 1, and the second side 12 and the fourth side 14 are long sides of the electronic device 1.
In the present embodiment, the number of the antenna elements 10 is 1, and the antenna elements 10 are disposed at a corner formed by the first side 11 and the fourth side 14. In the present embodiment, the antenna assembly 10 is positioned such that the antenna assembly 10 is not easily held by a user, thereby reducing or even avoiding the obstruction of the antenna assembly 10 to transmit and receive the electromagnetic wave signals due to the holding by the user.
Referring to fig. 30, fig. 30 is a schematic view of an electronic device according to another embodiment of the present application. The electronic device 1 has a first side 11, a second side 12, a third side 13 and a fourth side 14 which are connected end to end in sequence. First limit 11 with third limit 13 sets up relatively, second limit 12 with fourth limit 14 sets up relatively, the length of first limit 11 is less than the length of second limit 12, first radiator 111 with a part of second radiator 121 corresponds first limit 11 sets up, another part of second radiator 121 with third radiator 131 corresponds second limit 12 sets up.
The length of the first side 11 is smaller than the length of the second side 12, in other words, the first side 11 is a short side and the second side 12 is a long side. In the present embodiment, the first side 11 and the third side 13 are short sides of the electronic device 1, and the second side 12 and the fourth side 14 are long sides of the electronic device 1.
In this embodiment, the number of the antenna elements 10 is 2, one of the antenna elements 10 is disposed at the corner formed by the first side 11 and the fourth side 14, and the other antenna element 10 is disposed at the corner formed by the second side and the third side. The antenna assembly 10 is positioned such that the antenna assembly 10 is not easily held by a user, thereby reducing or even avoiding obstruction of the antenna assembly 10 to the transmission and reception of the electromagnetic wave signals by the user's holding.
It is understood that the antenna assembly 10 in fig. 29 and fig. 30 and their corresponding embodiments are only two embodiments of the electronic device 1, and in other embodiments, the electronic device 1 may further include other numbers of antenna assemblies 10, and the positions of the antenna assemblies 10 may also be located in other positions.
It should be understood that fig. 29 and 30 and the corresponding embodiments thereof are illustrated by taking the first side 11 and the third side 13 as short sides of the electronic device 1 and the second side 12 and the fourth side 14 as long sides of the electronic device 1 as examples, and in other embodiments, the first side 11, the second side 12, the third side 13 and the fourth side 14 are equal in length.
Although embodiments of the present application have been shown and described, it is understood that the above embodiments are illustrative and not restrictive, and that those skilled in the art may make changes, modifications, substitutions and alterations to the above embodiments without departing from the scope of the present application, and that such changes and modifications are also to be considered as within the scope of the present application.

Claims (20)

1. An antenna assembly, characterized in that the antenna assembly comprises:
the first antenna comprises a first radiating body and a first signal source, wherein the first radiating body is provided with a first feeding point, and the first signal source is electrically connected to the first feeding point so that the first antenna at least receives and transmits electromagnetic wave signals of a first frequency band;
the second antenna comprises a second radiator and a second signal source, the second radiator is a suspension antenna radiator, a first gap is formed between one end of the second radiator and the first radiator and the second radiator is mutually coupled, the second radiator is provided with a second feeding point, and the second signal source is electrically connected to the second feeding point so that the second antenna can at least receive and transmit electromagnetic wave signals of a second frequency band and a third frequency band, wherein the second frequency band is a GPS-L5 frequency band, and the third frequency band is a GPS-L1 frequency band; and
the third antenna comprises a third radiator and a third signal source, and a second gap is formed between the third radiator and the other end of the second radiator and is coupled with the third radiator; the third radiator is provided with a third feed point, and the third signal source is electrically connected with the third feed point so that the third antenna at least receives and transmits electromagnetic wave signals of a fourth frequency band.
2. The antenna assembly of claim 1, wherein the second radiator has a first connection point facing away from the second slot compared to the second feed point, the second antenna further comprising:
and one end of the frequency-selective filter circuit is electrically connected to the first connecting point, the other end of the frequency-selective filter circuit is grounded, and the frequency-selective filter circuit is used for adjusting the electrical length of the second antenna.
3. The antenna assembly of claim 2, wherein the frequency selective filtering circuit comprises:
one end of the first capacitor is grounded;
one end of the first inductor is electrically connected with the other end of the first capacitor, and the other end of the first inductor is electrically connected to the first connecting point; and
one end of the second inductor is grounded, and the other end of the second inductor is electrically connected to the first connecting point.
4. The antenna assembly of claim 2, wherein the second radiator further has a second connection point spaced from the first connection point, the second antenna further comprising:
and one end of the isolation circuit is electrically connected with the second connecting point, the other end of the isolation circuit is grounded, and the isolation circuit is used for isolating the first frequency band and the fourth frequency band.
5. The antenna assembly of claim 4, wherein the second connection point is disposed on a side of the first connection point facing away from the second feed point.
6. The antenna assembly of claim 1, wherein the first radiator further has a first ground facing away from the first slot, the first ground being grounded; the first antenna has at least:
a first resonance mode for supporting transceiving of electromagnetic wave signals of the first frequency band, wherein the first resonance mode is 1/8-1/4 wavelength mode from a first ground terminal to the first slot; and
a second resonance mode, configured to enable the first antenna to support transceiving of electromagnetic wave signals in a fifth frequency band, where the second resonance mode is an 1/4 wavelength mode from the first ground to the first slot.
7. The antenna assembly of claim 6, wherein the first antenna further comprises a first matching circuit comprising:
a capacitive coupling unit electrically connected between the first signal source and the first feeding point so that the first signal source is capacitively coupled and fed to the first feeding point through the capacitive coupling unit; and
the first tuning unit is electrically connected to the capacitive coupling unit and used for adjusting resonance frequency points of the electromagnetic wave signals of the first frequency band and the electromagnetic wave signals of the fifth frequency band.
8. The antenna assembly of claim 7, wherein the capacitive coupling element comprises a second capacitor, a third capacitor, one end of the second capacitor being electrically connected to the first feed point and the other end of the second capacitor being electrically connected to the third capacitor to the first signal source;
the first tuning unit comprises a fourth capacitor and a third inductor, one end of the fourth capacitor is grounded, and the other end of the fourth capacitor is electrically connected to the first feeding point; one end of the third inductor is grounded, and the other end of the third inductor is electrically connected to the connection point of the second capacitor and the third capacitor.
9. The antenna assembly of claim 2, wherein the second antenna has at least:
a third resonance mode, configured to support transceiving of electromagnetic wave signals in the second frequency band, where the third resonance mode is an 1/4 wavelength mode from a ground electrode electrically connected to the frequency-selective filter circuit to the second slot;
a fourth resonance mode, configured to support transceiving of electromagnetic wave signals in a third frequency band, where the fourth resonance mode is an 1/4 wavelength mode from a ground electrode electrically connected to the frequency-selective filter circuit to the second slot;
a fifth resonance mode, configured to support transceiving of electromagnetic wave signals in a sixth frequency band, where a second signal is sourced to the 1/4 wavelength mode of the first slot;
and a sixth resonance mode, configured to support transceiving of an electromagnetic wave signal in a seventh frequency band, where the sixth resonance mode is an 1/4 wavelength mode from a second signal source to the second slot.
10. The antenna assembly of claim 9, wherein the second antenna further comprises a second matching circuit, the second matching circuit comprising:
the second tuning unit is electrically connected with the second signal source and is used for carrying out impedance tuning;
one end of the first band impedance unit is electrically connected with the second tuning unit, the other end of the first band impedance unit is electrically connected with the second feeding point, and the first band impedance unit is used for isolating electromagnetic wave signals of at least partial frequency band which are received and transmitted by the third antenna; and
the first filtering unit is used for filtering high-frequency electromagnetic wave signals.
11. The antenna assembly of claim 10, wherein the second tuning unit comprises a fifth capacitor, a sixth capacitor and a fourth inductor, wherein one end of the fifth capacitor is connected to ground, the other end of the fifth capacitor is electrically connected to one end of the sixth capacitor, one end of the sixth capacitor is electrically connected to the first signal source, one end of the fourth inductor is connected to ground, and the other end of the fourth inductor is electrically connected to the other end of the fifth capacitor;
the first band-resistance unit comprises a seventh capacitor and a fifth inductor, one end of the seventh capacitor is electrically connected to the other end of the fifth capacitor, the other end of the seventh capacitor is electrically connected to the second feeding point, and the fifth inductor is connected with the seventh capacitor in parallel;
the first filtering unit comprises an eighth capacitor, one end of the eighth capacitor is grounded, and the other end of the eighth capacitor is electrically connected to the second feeding point.
12. The antenna assembly of claim 2, wherein the second radiator further has a second ground facing away from the second slot, the second ground being grounded, the third antenna having at least:
a seventh resonance mode, which is 1/8-1/4 wavelength mode from the second ground terminal to the second slot;
an eighth resonance mode which is an 1/2 wavelength resonance mode of the first to second slits;
a ninth resonance mode, wherein the ninth resonance frequency band is an 1/4 wavelength mode from the second ground terminal to the second slot; and
a tenth resonance mode, where the tenth resonance frequency band is an 3/4 wavelength mode from the ground to the second slot, where the seventh resonance mode, the eighth resonance mode, the ninth resonance mode, and the tenth resonance mode are commonly used to support the transceiving of electromagnetic wave signals in the fourth frequency band, the eighth frequency band, the ninth frequency band, and the tenth frequency band.
13. The antenna assembly of claim 12, wherein the third antenna further comprises a third matching circuit, the third matching circuit comprising:
the third tuning unit is electrically connected with the third signal source and is used for carrying out impedance tuning;
a second band elimination unit, one end of which is electrically connected to the third tuning unit and the other end is electrically connected to the third feed point, and the second band elimination unit is used for isolating the electromagnetic wave signals of at least partial frequency band transmitted and received by the second antenna; and
a second filtering unit for filtering the low frequency electromagnetic wave signal.
14. The antenna assembly of claim 13, wherein the third tuning unit comprises a ninth capacitor and a sixth inductor, one end of the ninth capacitor is connected to ground, the other end of the ninth capacitor is electrically connected to one end of the sixth inductor, and the other end of the sixth inductor is electrically connected to the third feeding point;
the second band elimination unit comprises a tenth capacitor and a seventh inductor, one end of the tenth capacitor is electrically connected with the other end of the ninth capacitor, the other end of the tenth capacitor is electrically connected to the third feeding point, and the seventh inductor is connected with the tenth capacitor in parallel;
the second filtering unit comprises an eighth inductor, one end of the eighth inductor is grounded, and the other end of the eighth inductor is electrically connected to the third feeding point.
15. The antenna assembly of any one of claims 1-14, further comprising:
a first isolation capacitor electrically connected to any one of the first radiator, the second radiator, and the third radiator; and
a proximity sensor electrically connected to a radiator to which the first isolation capacitor is electrically connected to detect whether a target object is proximate to the antenna assembly.
16. The antenna assembly of claim 15, further comprising:
and the first isolation inductor is electrically connected between a radiator electrically connected with the first isolation capacitor and the proximity sensor and is used for isolating interference of electromagnetic wave signals received and transmitted by the antenna assembly on detection signals for detecting that the target object approaches the antenna assembly.
17. The antenna assembly of claim 15, further comprising:
a second isolation capacitor electrically connected to any one of the first radiator, the second radiator, and the third radiator, and the second isolation capacitor and the first isolation capacitor are electrically connected to different radiators;
the proximity sensor is also electrically connected to a radiator to which the second isolation capacitor is electrically connected.
18. The antenna assembly of claim 17, further comprising:
and the second isolation inductor is electrically connected between the second isolation capacitor and the proximity sensor and is used for isolating interference of electromagnetic wave signals received and transmitted by the antenna assembly on detection signals for detecting that the target object approaches the antenna assembly.
19. The antenna assembly of claim 15, further comprising:
and the controller is used for reducing the transceiving power of the antenna assembly when the target object approaches the antenna assembly.
20. An electronic device, characterized in that the electronic device comprises an antenna assembly according to any one of claims 1-19.
CN202110218630.6A 2021-02-26 2021-02-26 Antenna assembly and electronic equipment Active CN113013594B (en)

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WO2023273604A1 (en) * 2021-06-30 2023-01-05 Oppo广东移动通信有限公司 Antenna module and electronic device
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CN113972479A (en) * 2021-10-14 2022-01-25 深圳市锐尔觅移动通信有限公司 Antenna assembly and electronic equipment
WO2023116780A1 (en) * 2021-12-23 2023-06-29 华为技术有限公司 Electronic device
CN114300840A (en) * 2022-01-21 2022-04-08 维沃移动通信有限公司 Electronic device
CN114552181A (en) * 2022-01-30 2022-05-27 Oppo广东移动通信有限公司 Antenna assembly and electronic equipment
WO2023142785A1 (en) * 2022-01-30 2023-08-03 Oppo广东移动通信有限公司 Antenna assembly and electronic device
CN114944548A (en) * 2022-05-27 2022-08-26 Oppo广东移动通信有限公司 Antenna assembly and electronic equipment
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