CN108232472B - Antenna assembly and electronic device - Google Patents
Antenna assembly and electronic device Download PDFInfo
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- CN108232472B CN108232472B CN201711458430.8A CN201711458430A CN108232472B CN 108232472 B CN108232472 B CN 108232472B CN 201711458430 A CN201711458430 A CN 201711458430A CN 108232472 B CN108232472 B CN 108232472B
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- antenna radiator
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- excitation signal
- antenna
- frequency band
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
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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
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2258—Supports; Mounting means by structural association with other equipment or articles used with computer equipment
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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
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
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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
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computer Hardware Design (AREA)
- General Engineering & Computer Science (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Transceivers (AREA)
- Details Of Aerials (AREA)
Abstract
The application provides an antenna assembly and an electronic device. The antenna assembly comprises a radio frequency signal source, a mode adjusting module and an antenna radiating body, wherein the radio frequency signal source is used for generating an excitation signal, the mode adjusting module is used for adjusting the mode of loading the excitation signal on the antenna radiating body, and the antenna radiating body sends out electromagnetic wave signals of different frequency bands according to different modes of loading the excitation signal on the antenna radiating body. The antenna assembly of the present application has a large bandwidth.
Description
Technical Field
The present application relates to the field of electronic devices, and in particular, to an antenna assembly and an electronic device.
Background
An antenna is a converter for converting a guided wave transmitted on a transmission line into an electromagnetic wave transmitted in an unbounded medium (usually free space), or a device for converting an electromagnetic wave transmitted in an unbounded medium into a guided wave that can be transmitted on a transmission line. An electronic device such as a mobile phone generally includes an antenna to implement a communication function of the electronic device such as the mobile phone. However, in the conventional electronic device, when the antenna receives the excitation signal (guided wave) emitted by the excitation source and converts the excitation signal into an electromagnetic wave signal (electromagnetic wave), the frequency band that can be realized is single, and thus the communication effect of the electronic device is poor.
Disclosure of Invention
The application provides an antenna assembly, antenna assembly includes radio frequency signal source, mode adjustment module and antenna radiator, radio frequency signal source is used for producing the excitation signal, the mode adjustment module is used for adjusting the excitation signal loads to mode on the antenna radiator, the antenna radiator loads to according to the excitation signal the electromagnetic wave signal of different frequency channels is sent to the difference of the mode on the antenna radiator.
Compare in prior art, including mode adjustment module in the antenna module of this application, mode adjustment module adjustment the excitation signal loads to the mode on the antenna radiator, so that the antenna radiator basis the excitation signal loads to the electromagnetic wave signal of different frequency channels is sent to the difference of the mode on the antenna radiator, and then has widened the bandwidth of the electromagnetic wave signal of antenna radiator radiation.
The present application further provides an electronic device including the antenna assembly.
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 structural diagram of an electronic device according to an embodiment of the present application.
Fig. 2 is a schematic circuit diagram of the mode adjustment module in fig. 1.
Fig. 3 is a schematic structural diagram of the frequency band matching module in fig. 1.
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.
In the description of the embodiments of the present application, it should be understood that the terms "thickness" and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, and do not imply or indicate that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present application.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an electronic device 1 according to an embodiment of the present disclosure. The electronic device 1 includes, but is not limited to, a smart phone, an internet device (MID), an electronic book, a Portable Player Station (PSP), a Personal Digital Assistant (PDA), or other communication devices.
The electronic device 1 comprises a housing 20. The housing 20 is typically a rear case of the electronic device 1. The housing 20 includes a first portion 20a, a second portion 20b, and a third portion 20 c. The first portion 20a, the second portion 20b, and the third portion 20c are made of metal. The first portion 20a and the second portion 20b are spaced apart from each other to form a gap, and a material having no shielding effect on electromagnetic wave signals is filled in the gap between the first portion 20a and the second portion 20b to form a first sealing layer 20 d. The second portion 20b and the third portion 20c are spaced apart from each other to form a gap, and the gap between the second portion 20b and the third portion 20c is filled with a material that does not shield electromagnetic wave signals, so as to form a second sealing layer 20 e. Typically, the first portion 20a is smaller in size than the second portion 20b, and the third portion 20c is smaller in size than the second portion 20 b. The first portion 20a may function as an antenna radiator 300, the third portion 20c may also function as an antenna radiator 300, and the second portion 20b forms a ground of the electronic device 1.
The electronic device 1 comprises an antenna assembly 10. The antenna assembly 10 includes a radio frequency signal source 100, a mode adjustment module 200, and an antenna radiator 300, where the radio frequency signal source 100 is configured to generate an excitation signal, the mode adjustment module 200 is configured to adjust a manner in which the excitation signal is loaded on the antenna radiator 300, and the antenna radiator 300 emits electromagnetic wave signals in different frequency bands according to a difference in the manner in which the excitation signal is loaded on the antenna radiator 300. In this embodiment, the antenna radiator 300 is the third portion 20 c. It is understood that the antenna radiator 300 may be the first portion 20a in other embodiments.
Compared with the prior art, the antenna assembly 10 of the present application includes the mode adjustment module 200, and the mode adjustment module 200 adjusts the mode that the excitation signal is loaded on the antenna radiator 300, so that the antenna radiator 300 sends out electromagnetic wave signals of different frequency bands according to the difference of the mode that the excitation signal is loaded on the antenna radiator 300, and further widens the bandwidth of the electromagnetic wave signals radiated by the antenna radiator 300.
Referring to fig. 2, fig. 2 is a circuit structure diagram of the mode adjustment module 200 in fig. 1. The mode adjustment module 200 includes a first capacitor C1, a second capacitor C2, a first switch SW1 and a second switch SW2, the first capacitor C1 includes a first end 210a and a second end 210b, the second capacitor C2 includes a third end 220a and a fourth end 220b, the first end 210a is electrically connected to the antenna radiator 300, the second end 210b is electrically connected to the third end 220a, the fourth end 220b receives the excitation signal, the first switch SW1 is connected in series between the first end 210a and the second end 210b, the second switch SW2 is connected in series between the first end 210a and the fourth end 220b, the first switch SW1 receives a first control signal and is turned on or off under the control of the first control, the second switch SW2 receives a second control signal and is turned on or off under the control of the second control signal, and the first switch SW1 and the second switch SW2 are turned on or off in different manners, thereby adjusting the manner in which the excitation signal is applied to the antenna radiator 300.
When the first switch SW1 and the second switch SW2 are both turned off, the driving signal is capacitively coupled to the antenna radiator 300 through the first capacitor C1 and the second capacitor C2, so that the antenna radiator 300 radiates an electromagnetic wave signal of a first predetermined frequency band according to the driving signal. When the first switch SW1 and the second switch SW2 are both turned off, the first capacitor C1 and the second capacitor C2 are connected in series, and the first capacitor C1 and the second capacitor C2 are connected in series and then electrically connected to the antenna radiator 300. The capacitance value of the first capacitor C1 is labeled C1, and the capacitance value of the second capacitor C2 is labeled C2, so that the capacitance value after the first capacitor C1 and the second capacitor C2 are connected in series is (C1 × C2)/(C1+ C2). At this time, the excitation signal is capacitively coupled to the antenna radiator 300 through the first capacitor C1 and the second capacitor C2 connected in series, so that an equivalent electrical length (denoted as a first equivalent electrical length) of the antenna radiator 300 is changed, and the antenna radiator 300 radiates an electromagnetic wave signal of a first preset frequency band according to the excitation signal.
When the first switch SW1 is turned on and the second switch SW2 is turned off, the excitation signal is capacitively coupled to the antenna radiator 300 through the second capacitor C2, so that the antenna radiator 300 radiates an electromagnetic wave signal of a second predetermined frequency band according to the excitation signal. When the first switch SW1 is turned on, the first capacitor C1 is short-circuited, the second switch SW2 is turned off, and the second capacitor C2 is electrically connected to the antenna radiator 300. The excitation signal is capacitively coupled to the antenna radiator 300 through the second capacitor C2, so that an equivalent electrical length (denoted as a second equivalent electrical length) of the antenna radiator 300 is changed, and the antenna radiator 300 radiates an electromagnetic wave signal of a second frequency band according to the excitation signal.
When the second switch SW2 is turned on, the excitation signal is directly coupled to the antenna radiator 300, so that the antenna radiator 300 radiates an electromagnetic wave signal of a third predetermined frequency band according to the excitation signal. When the two switches are turned on, no matter the first switch SW1 is turned on or off, the first capacitor C1 and the second capacitor C2 are both short-circuited, the first capacitor C1 and the second capacitor C2 cannot be connected to the antenna radiator 300, at this time, the excitation signal is directly coupled to the antenna radiator 300, at this time, the equivalent electrical length of the antenna radiator 300 is a third equivalent electrical length, and the antenna radiator 300 radiates an electromagnetic wave signal of a third preset frequency band according to the excitation signal.
Since the antenna radiator 300 loads the excitation signal in different manners, the first equivalent electrical length, the second equivalent electrical length, and the third equivalent electrical length are different from each other, and thus the first preset frequency band, the second preset frequency band, and the third preset frequency band are different from each other. Generally, when the antenna radiator 300 is loaded with an excitation signal by capacitive coupling, the smaller the capacitance value of the capacitor is, the longer the equivalent electrical length of the antenna radiator 300 is, and the lower the frequency band of the electromagnetic wave that can be radiated by the antenna radiator 300 is; it can be understood that when the antenna radiator 300 is loaded with the excitation signal by capacitive coupling, the capacitance of the capacitor is larger, the equivalent electrical length of the antenna radiator 300 is shorter, and the frequency band of the electromagnetic wave that can be radiated by the antenna radiator 300 is higher.
Referring to fig. 3, fig. 3 is a schematic structural diagram of the frequency band matching module 400 in fig. 1. The antenna assembly 10 further includes at least one frequency band matching module 400, where the frequency band matching module 400 is configured to adjust a frequency band of an electromagnetic wave signal radiated by the antenna radiator 300. The frequency band matching module 400 includes a frequency band matching circuit 410 and a third switch SW3, wherein one end of the frequency band matching circuit 410 is grounded, the other end of the frequency band matching circuit 410 receives the excitation signal through the third switch SW3, when the third switch SW3 is turned on, the frequency band matching circuit 410 is electrically connected to the antenna radiator 300, and when the third switch SW3 is turned off, the frequency band matching circuit 410 is disconnected from the antenna radiator 300; a frequency band of the electromagnetic wave signal radiated by the antenna radiator 300 when the third switch SW3 is turned on is different from a frequency band of the electromagnetic wave signal radiated by the antenna radiator 300 when the third switch SW3 is turned off.
When the number of the frequency band matching modules 400 is multiple, and the frequency band matching circuit in each frequency band matching module 400 is separately connected to the antenna radiator 300, the frequency bands of the electromagnetic waves radiated by the antenna radiator 300 are different. In this embodiment, the number of the frequency band matching modules 400 is two for example. For convenience of distinction, the two frequency band matching modules 400 are respectively denoted as a first frequency band matching module 400a and a second frequency band matching module 400 b. The first frequency band matching module 400a includes a frequency band matching circuit 410a and a third switch SW3a, when the third switch SW3a is turned on, the frequency band matching circuit 410a is connected to the antenna radiator 300, at this time, the equivalent electrical length of the antenna radiator 300 is changed, and the antenna radiator 300 radiates an electromagnetic wave signal of a fifth preset frequency band according to the excitation signal; when the third switch SW3a is turned off, the matching circuit 410a is turned off from the antenna radiator 300, and the antenna radiator 300 radiates an electromagnetic wave signal of a sixth preset frequency band according to the excitation signal. The second frequency band matching module 400b includes a frequency band matching circuit 410b and a third switch SW3b, when the third switch SW3b is turned on, the frequency band matching circuit 410b is connected to the antenna radiator 300, at this time, the equivalent electrical length of the antenna radiator 300 is changed, and the antenna radiator 300 radiates an electromagnetic wave signal of a seventh preset frequency band according to the excitation signal; when the third switch SW3b is turned off, the matching circuit 410b is turned off from the antenna radiator 300, and the antenna radiator 300 radiates an electromagnetic wave signal of an eighth preset frequency band according to the excitation signal. When the frequency band matching circuit in each frequency band matching module 400 is separately connected to the antenna radiator 300, the frequency bands of the electromagnetic waves radiated by the antenna radiator 300 are different. When the number of the frequency band matching modules 400 is plural, different combinations of the frequency band matching circuits in each frequency band matching module 400 are electrically connected to the antenna radiator 300, so that the equivalent electrical length of the antenna radiator 300 is adjusted, and thus, the frequency band of the electromagnetic wave signal radiated by the antenna radiator 300 is adjusted.
It is understood that any manner of the frequency band matching circuit may be combined with any manner of the mode adjustment module 200, so that the antenna radiator 300 radiates electromagnetic wave signals of more frequency bands, thereby increasing the bandwidth of the antenna assembly 10.
The antenna assembly further includes an impedance matching module 700, one end of the impedance matching module 700 is electrically connected to the rf signal source 100, and the other end of the impedance matching module 700 is electrically connected to the mode adjustment module 200, the impedance matching module 700 is configured to adjust an output impedance of the rf signal source 100, and the impedance matching module 700 is further configured to adjust input impedances of the mode adjustment module 200 and the antenna radiator 300, so as to adjust a matching degree between the output impedance and the input impedance. The antenna assembly 10 of the present invention adjusts the matching degree between the output impedance and the input impedance, so that the output impedance of the radio frequency signal source 100 matches the input impedance of the mode adjustment module 200 and the antenna radiator 300, so as to reduce the energy loss of the excitation signal emitted by the radio frequency signal source 100 transmitted to the antenna radiator 300, improve the signal transmission quality of the excitation signal emitted by the radio frequency signal source 100, and improve the communication quality of the electronic device 1 to which the antenna assembly 10 is applied.
Referring to fig. 1 again, the housing 20 further includes a first connector 500, and the first connector 500 is electrically connected to the mode adjustment module 200 and the antenna radiator 300 to electrically connect the mode adjustment module 200 and the antenna radiator 300.
The housing 20 further comprises at least one second connector 600. In fig. 1 two second connectors 600 are illustrated, one end of which is connected to the second portion 20b and the other part is connected to the third portion 20 c. The two connectors are arranged at intervals of 600. The second connector 600 is used to connect the antenna radiator 300 to ground.
The foregoing is an implementation of the embodiments of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the embodiments of the present application, and these modifications and decorations are also regarded as the protection scope of the present application.
Claims (9)
1. An antenna assembly, comprising a radio frequency signal source, a mode adjustment module, and an antenna radiator, wherein the radio frequency signal source is configured to generate an excitation signal, the mode adjustment module is configured to adjust a manner in which the excitation signal is applied to the antenna radiator, and the antenna radiator emits electromagnetic wave signals of different frequency bands according to a difference in the manner in which the excitation signal is applied to the antenna radiator;
wherein the mode adjustment module comprises a first capacitor, a second capacitor, a first switch and a second switch, the first capacitor comprises a first end and a second end, the second capacitor comprises a third end and a fourth end, the first end is electrically connected with the antenna radiator, the second end is electrically connected with the third end, the fourth end receives the excitation signal, the first switch is connected in series between the first terminal and the second terminal, the second switch is connected in series between the first terminal and the fourth terminal, the first switch receives a first control signal, and is turned on or off under the control of the first control, the second switch receives a second control signal, and the excitation signal is switched on or off under the control of the second control signal, and the first switch and the second switch are switched on or off in different modes, so that the mode of loading the excitation signal on the antenna radiator is adjusted.
2. The antenna assembly of claim 1, wherein when the first switch and the second switch are both open, the excitation signal is capacitively coupled to the antenna radiator via the first capacitor and the second capacitor, such that the antenna radiator radiates electromagnetic wave signals in a first predetermined frequency band in response to the excitation signal.
3. The antenna assembly of claim 1, wherein when the first switch is on and the second switch is off, the excitation signal is capacitively coupled to the antenna radiator via the second capacitor, such that the antenna radiator radiates electromagnetic wave signals in a second predetermined frequency band in response to the excitation signal.
4. The antenna assembly of claim 1, wherein when the second switch is turned on, the excitation signal is directly coupled to the antenna radiator such that the antenna radiator radiates electromagnetic wave signals of a third predetermined frequency band in accordance with the excitation signal.
5. The antenna assembly of claim 1, further comprising an impedance matching module electrically connected to the rf signal source at one end and to the mode adjustment module at another end, the impedance matching module configured to adjust an output impedance of the rf signal source, and the impedance matching module further configured to adjust an input impedance of the mode adjustment module and the antenna radiator to adjust a degree of matching of the output impedance to the input impedance.
6. The antenna assembly of claim 1, further comprising at least one frequency band matching module for adjusting a frequency band of the electromagnetic wave signals radiated by the antenna radiators in accordance with the excitation signal.
7. The antenna assembly of claim 6, wherein the band matching module comprises a band matching circuit and a third switch, wherein one end of the band matching circuit is grounded, and the other end of the band matching circuit receives the excitation signal through the third switch, and wherein the band matching circuit is electrically connected to the antenna radiator when the third switch is turned on, and is disconnected from the antenna radiator when the third switch is turned off; the frequency band of the electromagnetic wave signal radiated by the antenna radiator when the third switch is turned on is different from the frequency band of the electromagnetic wave signal radiated by the antenna radiator when the third switch is turned off.
8. The antenna assembly of claim 7, wherein when the number of the band matching modules is plural, and the band matching circuit in each band matching module is individually connected to the antenna radiator, the frequency band of the electromagnetic wave radiated from the antenna radiator is different.
9. An electronic device, characterized in that the electronic device comprises an antenna assembly according to any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711458430.8A CN108232472B (en) | 2017-12-27 | 2017-12-27 | Antenna assembly and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711458430.8A CN108232472B (en) | 2017-12-27 | 2017-12-27 | Antenna assembly and electronic device |
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| Publication Number | Publication Date |
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| CN108232472A CN108232472A (en) | 2018-06-29 |
| CN108232472B true CN108232472B (en) | 2020-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711458430.8A Active CN108232472B (en) | 2017-12-27 | 2017-12-27 | Antenna assembly and electronic device |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108736131B (en) * | 2018-07-13 | 2020-09-04 | Oppo广东移动通信有限公司 | Antenna assembly and electronic device |
| CN109687151B (en) * | 2018-12-26 | 2021-12-14 | 维沃移动通信有限公司 | Antenna structure and mobile terminal |
| CN112310610A (en) * | 2019-08-02 | 2021-02-02 | 青岛海信移动通信技术股份有限公司 | Mobile terminal |
| CN111541051B (en) * | 2020-05-11 | 2022-01-25 | Oppo广东移动通信有限公司 | Antenna and communication device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103682572A (en) * | 2012-08-29 | 2014-03-26 | 宏达国际电子股份有限公司 | Mobile device |
| CN106252880A (en) * | 2016-08-31 | 2016-12-21 | 宇龙计算机通信科技(深圳)有限公司 | Antenna assembly and mobile terminal |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103682572A (en) * | 2012-08-29 | 2014-03-26 | 宏达国际电子股份有限公司 | Mobile device |
| CN106252880A (en) * | 2016-08-31 | 2016-12-21 | 宇龙计算机通信科技(深圳)有限公司 | Antenna assembly and mobile terminal |
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| CN108232472A (en) | 2018-06-29 |
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Address after: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Applicant after: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., Ltd. Address before: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Applicant before: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., Ltd. |
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