CN111063987B - Electronic device back cover and electronic device - Google Patents
Electronic device back cover and electronic device Download PDFInfo
- Publication number
- CN111063987B CN111063987B CN201811200405.4A CN201811200405A CN111063987B CN 111063987 B CN111063987 B CN 111063987B CN 201811200405 A CN201811200405 A CN 201811200405A CN 111063987 B CN111063987 B CN 111063987B
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- radiator
- electronic device
- slot
- back cover
- device back
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—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
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- General Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Support Of Aerials (AREA)
- Details Of Aerials (AREA)
Abstract
The invention provides a back cover of an electronic device, which comprises a metal body. The metal body is provided with a first side edge, a second side edge adjacent to the first side edge and a slot sunken in the first side edge. The metal body comprises a first radiator, a second radiator and a grounding radiator. The first radiator is located in the slot and has a main body portion and a branch portion which form a T shape together. The first radiator operates in a first frequency band. The body portion includes a feed end proximate the closed end of the slot. The second radiator is adjacent to the slot, is defined by the first side edge, the second side edge and the edge of the slot, and operates in a second frequency band. The grounded radiator is formed by a portion of the metal body outside the first and second radiators. The second radiator and the branch part are connected with the grounding radiator. The first radiator, the second radiator and the grounding radiator are used as an antenna structure together. An electronic device is also provided.
Description
Technical Field
The present invention relates to a back cover and an electronic device, and more particularly, to a back cover of an electronic device capable of forming an antenna structure and an electronic device using the back cover.
Background
In recent years, the main body of the notebook computer is mostly made of metal, and the appearance of the notebook computer is usually designed with a narrow frame, so as to provide a more beautiful appearance. In order to avoid the effect of the antenna being affected by the shielding effect of the metal material, the antenna of the notebook computer is currently arranged in the system, but under the configuration, the antenna is easily interfered by the noise inside the system, and further the signal quality is directly affected. Another way is to support the antenna by the circuit board and move the antenna to the top side (frame), but this makes it difficult to reduce the outer frame space of the display panel, which is not favorable for the notebook computer to develop toward the narrow frame. Therefore, how to adjust the antenna structure to make the notebook computer have the appearance of both the metal body and the narrow frame is one of the problems to be solved and overcome.
Disclosure of Invention
The invention provides a back cover of an electronic device, which is provided with an antenna structure.
The invention provides an electronic device which is provided with the electronic device back cover and can have the appearances of a metal body and a narrow frame.
The back cover of the electronic device comprises a metal body. The metal body is provided with a first side edge, a second side edge adjacent to the first side edge and a slot sunken in the first side edge. The metal body comprises a first radiator, a second radiator and a grounding radiator. The first radiator is located in the slot. The first radiator is provided with a main body part and a branch part. The main body portion and the branch portion together form a T-shape. The body portion includes a feed end proximate the closed end of the slot. The first radiator operates in a first frequency band. The second radiator is adjacent to the slot and is defined by the first side edge, the second side edge and the edge of the slot. The second radiator operates in a second frequency band. The grounding radiator is formed by a metal body outside the first radiator and the second radiator. The second radiator and the branch part are connected with the grounding radiator. The first radiator, the second radiator and the grounding radiator are used as an antenna structure together.
In an embodiment of the invention, the width of the slot is between 2 mm and 2.5 mm.
In an embodiment of the invention, the length of the main body is between 10 mm and 12.5 mm. The width of the main body part is between 1.5 mm and 2 mm.
In an embodiment of the invention, the length of the first radiator is 1/4 of the wavelength of the first frequency band. The length of the second radiator is the same as the recess depth of the slot. The length of the second radiator is 1/4 times the wavelength of the second frequency band.
In an embodiment of the invention, a distance between the branch portion and the feeding end of the first radiator is between 1/2 and 2/3 times a length of the body portion.
In an embodiment of the invention, a sum of a width of the second radiator and a width of the corresponding slot is less than or equal to 5 mm.
In an embodiment of the invention, the electronic device back cover further includes a non-conductive filling member. The non-conductor filling piece is filled in the slot.
In an embodiment of the invention, the first side edge includes two first side edges. The two first side edges are opposite to each other. The second side edge is located between and connected to the two first side edges. The first radiator comprises two first radiators. The second radiator includes two second radiators. One of the first radiators and the corresponding second radiator and the other first radiator and the corresponding second radiator are symmetrically located on the metal body.
The electronic device comprises the electronic device back cover, the circuit board and the coaxial transmission line. The circuit board includes a wireless communication module. A coaxial transmission line connects the antenna structure to the wireless communication module.
In an embodiment of the invention, the electronic device further includes a display screen. The orthographic projection of the display screen to the back cover of the electronic device is not overlapped with the antenna structure.
Based on the above, the structural design of the first radiator, the second radiator and the ground radiator of the back cover of the electronic device of the present invention enables the metal body to be directly used as the antenna structure, so that the dielectric substrate for carrying the antenna structure can be omitted, and the thickness of the electronic device can be reduced. In addition, because the antenna structure is not required to be configured at the frame of the electronic device, the width of the frame can be reduced, and the effect of narrow frame can be achieved. In addition, the back cover of the electronic device is made of metal, so that high-quality appearance can be provided.
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a schematic perspective view of an electronic device according to an embodiment of the invention.
Fig. 2 is a schematic diagram of an electronic device back cover of the electronic device of fig. 1.
Fig. 3 is a partial enlarged view of the electronic device of fig. 2.
Fig. 4 is a schematic diagram of a coaxial transmission line configuration on fig. 3.
Fig. 5 is a graph of frequency versus return loss for the antenna structure of the electronic device of fig. 1.
Fig. 6 is a graph of frequency versus efficiency for the antenna structure of the electronic device of fig. 1.
[ notation ] to show
10: electronic device
20: circuit board
22: wireless communication module
30: coaxial transmission line
40: display screen
100: electronic device back cover
110: metal body
111: the first side edge
112: second side edge
116: slot slot
118: closed end
119: edge of a container
120: first radiator
121: main body part
122: branch part
123: feed-in terminal
130: second radiator
140: ground radiator
150: antenna structure
160: non-conductor filling member
D: distance between two adjacent plates
W1, W2, W3: width of
L1, L2: length of
P1, P2: resonant path
Detailed Description
Fig. 1 is a schematic perspective view of an electronic device according to an embodiment of the invention. Referring to fig. 1, the electronic device 10 of the present embodiment is a notebook computer as an example, but the invention is not limited thereto, and in other embodiments, the electronic device 10 may also be other electronic devices such as a mobile phone and a tablet computer. In the present embodiment, the electronic device 10 has an upper body and a lower body. The upper body includes a back cover 100 of the electronic device, and the lower body includes a circuit board 20.
In the present embodiment, the electronic device back cover 100 is configured with two antenna structures 150, wherein the two antenna structures 150 are symmetrically configured and close to the corners of the upper body of the electronic device 10. The circuit board 20 includes a wireless communication module 22. Two coaxial transmission lines 30 (shown in fig. 4) extend from the upper body to the lower body to connect the two antenna structures 150 to the wireless communication module 22, respectively. In fig. 1, the circuit board 20 and the wireless communication module 22 are shown in dashed lines because they are located inside the electronic device 10, and the configuration thereof is only schematically shown, and the location of the configuration is not limited. In addition, in other embodiments, the number of the antenna structures 150 may also be one, and the invention is not limited thereto.
Fig. 2 is a schematic diagram of an electronic device back cover of the electronic device of fig. 1. As shown in fig. 2, in the present embodiment, the electronic device back cover 100 includes a metal body 110. The metal body 110 has two opposite first sides 111, a second side 112 connecting the two first sides 111, and two slots 116 recessed in the first sides 111. More specifically, each slot 116 extends in a direction parallel to the second side 112 and forms an opening at the first side 111. In the present embodiment, as shown in fig. 2, the electronic device back cover 100 forms two antenna structures 150 in a small area on the upper left and a small area on the upper right. The antenna structure 150 at the upper right will be taken as an example for detailed description.
As shown in fig. 2, the metal body 110 includes two first radiators 120, two second radiators 130, and a ground radiator 140. In this embodiment, one of the first radiators 120 and the corresponding second radiator 130 and the other of the first radiators 120 and the corresponding second radiator 130 are symmetrically disposed on the metal body 110.
Fig. 3 is a partial enlarged view of the electronic device of fig. 2. Fig. 4 is a schematic diagram of a coaxial transmission line configuration on fig. 3. Referring to fig. 3 and 4, in the present embodiment, the first radiator 120 is located in the slot 116. The first radiator 120 has a body portion 121 and a branch portion 122. The main body 121 and the branch 122 together form a T-shape. Each slot 116 has a closed end 118. Body portion 121 includes a feed end 123 proximate closed end 118 of slot 116. The first radiator 120 is configured to operate in a first frequency band. As shown in fig. 4, in the present embodiment, the positive terminal of the coaxial transmission line 30 is connected to the feeding terminal 123, and the negative terminal is connected to the grounding radiator 140, so as to transmit the received antenna signal to the wireless communication module 22 (shown in fig. 1).
Referring back to fig. 3, the second radiator 130 is adjacent to an edge 119 of the slot 116 (i.e., the slot 116 is at the upper edge of fig. 3) and is located outside the slot 116. The second radiator 130 is defined by the first side 111 and the second side 112 and the corresponding edge 119 of the slot 116. The second radiator 130 has a substantially straight bar shape and is parallel to the first radiator 120. The second radiator 130 is configured to operate in a second frequency band.
The grounded radiator 140 is formed by the metal body 110 outside the first radiator 120 and the second radiator 130, that is, the portion of the metal body 110 excluding the first radiator 120 and the second radiator 130 is the grounded radiator 140. The second radiator 130 is connected to the ground radiator 140 with the leg 122 of the first radiator 120. Further, the first radiator 120, the corresponding second radiator 130, and the ground radiator 140 collectively serve as an antenna structure 150.
In the present embodiment, the frequency of the first frequency band of the first radiator 120 is higher than the frequency of the second frequency band of the second radiator 130. Further, the first frequency band is between 5.15GHz and 5.85GHz, and the second frequency band is between 2.4GHz and 2.5GHz, such that the antenna structure 150 can support dual-band operation at 2.4GHz/5 GHz. It should be noted that the frequencies of the first frequency band and the second frequency band are not limited in the present invention.
Referring to fig. 3, in the present embodiment, the width W3 of the slot 116 is between 2 mm and 2.5 mm, and preferably, the width W3 of the slot 116 is about 2.2 mm. The length L1 of the body portion 121 is about 1/4 of the wavelength of the first frequency band and is between 10 mm and 12.5 mm, and preferably, the length L1 of the body portion 121 is about 10 mm. The width W1 of the body portion 121 is between 1.5 mm and 2 mm.
In the present embodiment, the length L2 of the second radiator 130 is the same as the recess depth of the slot 116 and is about 1/4 times the wavelength of the second frequency band, that is, one end of the second radiator 130 corresponding to the ground radiator 140 is flush with the closed end 118 of the slot 116. The distance D between the branch portion 122 of the first radiator 120 and the feeding end 123 is between 1/2 and 2/3 times the length L1 of the body portion 121. The sum of the width W2 of the second radiator 130 and the width W3 of the corresponding slot 116 is less than or equal to 5 mm. As can be seen from the above values, the size of the antenna structure 150 of the present embodiment is relatively small.
Referring back to fig. 2, in the present embodiment, the electronic device 10 further includes a display screen 40. An orthographic projection of the display screen 40 to the electronic device back cover 100 does not overlap the antenna structure 150. Because the size of the antenna structure 150 is relatively small, the display screen 40 may be selected to have a larger size, giving the designer more options. Of course, in other embodiments, the orthographic projection of the display screen 40 on the electronic device back cover 100 may also be overlapped on the antenna structure 150, which is not limited in the present invention.
Referring to fig. 4, in the present embodiment, the resonant path P1 of the first radiator 120 is directed from the feeding end 123 toward the first side 111, and the resonant path P2 of the second radiator 130 is directed from the first side 111 toward the ground radiator 140. The resonant paths P1 of the first radiator 120 are opposite to the resonant path P2 of the second radiator 130 and parallel to each other. Further, the first frequency band (high frequency band) and the second frequency band (low frequency band) have independent resonance paths so that the frequency bands do not interfere with each other. Therefore, the high-frequency and low-frequency characteristics of the antenna structure 150 of the present invention can be independently controlled or adjusted, which is helpful to improve the communication quality of the electronic device 10.
It is noted that different sections of the metal body 110 respectively constitute the first radiator 120, the second radiator 130 and the ground radiator 140. In other words, in the present embodiment, the metal body 110 directly serves as the antenna structure 150 in addition to serving as the back cover. Since the metal body 110 has a certain supporting property, the antenna structure 150 does not need to be formed on a substrate (e.g., a frame radar 4(FR4) substrate, a Printed Circuit Board (PCB), or a Flexible Printed Circuit Board (FPCB)).
Compared with the conventional electronic device in which the antenna structure is disposed inside the upper body, the electronic device 10 of the embodiment does not need to dispose the antenna structure 150 inside the upper body because the antenna structure 150 is exposed, so that the thickness of the upper body can be reduced. Moreover, the electronic device 10 of the present embodiment does not need to dispose the antenna structure 150 at the frame, thereby achieving the appearance design of a narrow frame. In this way, the electronic device 10 of the present invention can have both the metal material and the narrow frame design.
In this embodiment, the electronic device back cover 100 further includes at least one non-conductive filling member 160, wherein the number of the non-conductive filling members 160 is two and the two non-conductive filling members are respectively filled in the two slots 116. The electronic device back cover 100 fills the space in the slot 116 with the non-conductive filler 160, so as to beautify the appearance and structural strength of the electronic device back cover 100. In the present embodiment, the non-conductive filler 160 is, for example, resin, plastic or other suitable non-conductive material.
Fig. 5 is a graph of frequency versus return loss for the antenna structure of the electronic device of fig. 1. Referring to fig. 5, the Return Loss (Return Loss) of-10 dB is taken as a standard, and the Return Loss of the antenna structure 150 in the present embodiment is substantially below-10 dB in both the first frequency band (corresponding to the frequency of 5.15GHz to 5.85GHz) and the second frequency band (corresponding to the frequency of 2.4GHz to 2.5 GHz). It can be seen that the antenna structure 150 has good performance of return loss in the first frequency band (5G frequency band) and the second frequency band (2.4G frequency band), and the bandwidth performance is quite sufficient, so as to provide good impedance matching and improve the quality of signal transmission and reception.
Fig. 6 is a graph of frequency versus efficiency for the antenna structure of the electronic device of fig. 1. Referring to fig. 6, the antenna structure 150 has an antenna efficiency of about-3.5 dB to-5 dB in the first frequency band (corresponding to frequencies of 5150 mhz to 5850 mhz) and an antenna efficiency of about-2 dB in the second frequency band (corresponding to frequencies of 2400 mhz to 2500 mhz) based on an antenna efficiency of-4 dB. Therefore, the antenna structure 150 of the present embodiment has an antenna efficiency of approximately-4 dB above in the first frequency band and the second frequency band, and has a good antenna efficiency performance, which meets the requirement of practical application, so that the electronic device 10 of the present invention can be stably applied to dual-band operation.
In summary, the back cover of the electronic device of the present invention has a metal body, and a slot is directly formed on a side of the metal body to form an antenna structure formed by the first radiator, the second radiator and the ground radiator. Because the first radiator, the second radiator and the grounding radiator are all part of the metal body, the metal body of the invention can be directly used as an antenna structure, a substrate required by the traditional bearing antenna can be saved, the thickness of the electronic device is reduced, and the antenna structure does not need to be arranged at the frame, and the electronic device can adopt the appearance design of a narrow frame. In addition, the first radiator and the second radiator have independent resonant paths, so that the corresponding high-frequency band and low-frequency band can be controlled or adjusted respectively, and the communication quality of the electronic device is improved. Furthermore, the antenna structure of the present invention has good return loss and antenna efficiency by the dimensional arrangement between the first radiator, the second radiator and the slot, so that the electronic device has good performance in dual-band operation.
Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.
Claims (10)
1. An electronic device back cover, comprising:
a metal body having at least a first side, a second side adjacent to the at least a first side, and at least a slot recessed in the at least a first side, the metal body comprising:
at least one first radiator located in the at least one slot, wherein each first radiator has a main portion and a branch portion, the main portion and the branch portion together form a T shape, the main portion includes a feed-in end close to a closed end of the slot, each first radiator operates in a first frequency band,
at least one second radiator adjacent to the at least one slot and defined by the at least one first side and the second side and at least one edge of the at least one slot, each second radiator operating in a second frequency band; and
a ground radiator formed by a portion of the metal body outside the at least one first radiator and the at least one second radiator, the at least one second radiator connected to the ground radiator with the at least one portion, wherein the at least one first radiator, the at least one second radiator, and the ground radiator collectively serve as at least one antenna structure.
2. The electronic device back cover of claim 1, wherein the width of each slot is between 2 mm and 2.5 mm.
3. The electronic device back cover of claim 1, wherein the length of each main body portion is between 10 mm and 12.5 mm, and the width of each main body portion is between 1.5 mm and 2 mm.
4. The electronic device back cover according to claim 1, wherein the length of each first radiator is 1/4 of the wavelength of the first frequency band, the length of each second radiator is equal to the recess depth of each slot along the extension direction of the second side, and the length of each second radiator is 1/4 of the wavelength of the second frequency band.
5. The electronic device back cover of claim 1, wherein the distance between the branch portion and the feeding end of each first radiator is between 1/2 and 2/3 times the length of the main body portion.
6. The electronic device back cover of claim 1, wherein a sum of a width of each of the second radiators and a width of the corresponding slot is less than or equal to 5 mm.
7. The electronic device back cover of claim 1, further comprising at least one non-conductive filler filled into the at least one slot.
8. The electronic device back cover according to claim 1, wherein the at least one first side includes two first sides, the two first sides are opposite to each other, the second side is located between the two first sides and connected to the two first sides, the at least one first radiator includes two first radiators, the at least one second radiator includes two second radiators, one of the first radiators and the corresponding second radiator are located symmetrically on the metal body, and the other of the first radiators and the corresponding second radiator are located symmetrically on the metal body.
9. An electronic device, comprising:
the electronic device back cover of any of claims 1-8;
a circuit board including a wireless communication module; and
at least one coaxial transmission line connecting the at least one antenna structure to the wireless communication module.
10. The electronic device of claim 9, further comprising a display screen, wherein an orthographic projection of the display screen onto the electronic device back cover does not overlap the at least one antenna structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811200405.4A CN111063987B (en) | 2018-10-16 | 2018-10-16 | Electronic device back cover and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811200405.4A CN111063987B (en) | 2018-10-16 | 2018-10-16 | Electronic device back cover and electronic device |
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| Publication Number | Publication Date |
|---|---|
| CN111063987A CN111063987A (en) | 2020-04-24 |
| CN111063987B true CN111063987B (en) | 2022-05-03 |
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| CN201811200405.4A Active CN111063987B (en) | 2018-10-16 | 2018-10-16 | Electronic device back cover and electronic device |
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| TW201735444A (en) * | 2016-03-17 | 2017-10-01 | 宏碁股份有限公司 | Mobile device |
| CN108270076A (en) * | 2017-01-03 | 2018-07-10 | 和硕联合科技股份有限公司 | Planar antenna module and electronic device |
| TWM553500U (en) * | 2017-08-08 | 2017-12-21 | 宏碁股份有限公司 | Mobile device |
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