CN109841955B - Antenna structure and electronic device with same - Google Patents
Antenna structure and electronic device with same Download PDFInfo
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- CN109841955B CN109841955B CN201711207130.2A CN201711207130A CN109841955B CN 109841955 B CN109841955 B CN 109841955B CN 201711207130 A CN201711207130 A CN 201711207130A CN 109841955 B CN109841955 B CN 109841955B
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Abstract
The invention provides an antenna structure which comprises an antenna body, a feed-in part and an extension part, wherein a slot is formed in the antenna body, the extension part and the antenna body are arranged at intervals, the feed-in part is arranged between the antenna body and the extension part, one end of the feed-in part is electrically connected to a feed-in point, the other end of the feed-in part spans the slot and is electrically connected with the antenna body, and a current signal is fed into the antenna body. The antenna structure can work in a BT/WIFI mode without setting a corresponding clearance area. Moreover, the extension part can effectively improve the radiation efficiency. The invention also provides a wireless communication device with the antenna structure.
Description
Technical Field
The invention relates to an antenna structure and an electronic device with the same.
Background
The wearable electronic devices, such as smart watches, are increasingly in various types, and especially in combination with modern information technology, the functions of the wearable electronic devices become diversified, such as watches with a communication function, smart voice watches, and so on. Most of these wearable electronic devices require signal transmitting and receiving devices (such as antennas). However, as the wearable electronic device is thinned, the space for accommodating the antenna is smaller. Therefore, how to maintain the transmission characteristics of the antenna in a limited space is an important issue for antenna design.
Disclosure of Invention
Accordingly, an antenna structure and an electronic device having the same are provided.
An antenna structure comprises an antenna body, a feed-in part and an extension part, wherein a slot is formed in the antenna body, the extension part and the antenna body are arranged at intervals, the feed-in part is arranged between the antenna body and the extension part, one end of the feed-in part is electrically connected to a feed-in point, the other end of the feed-in part spans the slot and is electrically connected with the antenna body, and a current signal is fed into the antenna body.
An electronic device comprises the antenna structure.
The antenna structure and the electronic device with the antenna structure are provided with the slots on the antenna body. Therefore, the antenna body can work in a BT/WIFI mode (2.4-2.48GHz) without setting a corresponding clearance area. Moreover, the antenna structure can effectively improve the radiation efficiency of the electronic device when the electronic device is worn on the hand of a user by arranging the extension part. In addition, the slot can be matched with an opening on the shell, so that the functional module of the electronic device is exposed out of the opening and the slot part. Therefore, the effective combination of the slotting and the functional module is realized, the space of the electronic device is fully utilized, and the miniaturization of the electronic device is facilitated.
Drawings
Fig. 1 is an exploded view of an electronic device according to a preferred embodiment of the invention.
Fig. 2 is an assembly diagram of the electronic device shown in fig. 1.
Fig. 3 is a schematic cross-sectional view taken along line III-III of the electronic device shown in fig. 2.
Fig. 4 is a circuit diagram of a matching circuit of the antenna structure of the electronic device shown in fig. 1.
Fig. 5 is a graph of S-parameters (scattering parameters) of the antenna structure of the electronic device shown in fig. 1.
Fig. 6 is a graph of the total radiation efficiency of the antenna structure in the electronic device of fig. 1.
Description of the main elements
Top 111
Feed-in part 13
First feed-in segment 131
Connecting section 133
Second feed-in section 135
Matching circuit 19
First matching element 191
Second matching element 193
Feed-in point 235
Liquid crystal display module 25
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "electrically connected" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "electrically connected" to another element, it can be connected by contact, e.g., by wires, or by contactless connection, e.g., by contactless coupling.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Referring to fig. 1 and 2, an antenna structure 100 for transmitting and receiving radio waves to transmit and exchange wireless signals in an electronic device 200 is provided in accordance with a preferred embodiment of the present invention. The electronic device 200 may be a wearable device such as a bracelet, a smart watch, glasses, and a helmet, and may also be an electronic product such as a mobile phone, a personal digital assistant, and an MP3 player. In the present embodiment, the electronic device 200 is taken as a wearable device for illustration.
In the present embodiment, the electronic device 200 has a size of approximately 41.1mm 16mm 9.65 mm. The electronic device 200 further includes a housing 21, a substrate 23 and at least one electronic component. The housing 21 includes a body 211 and a cover 213. The body 211 and the cover 213 may be made of an insulating material such as plastic. The body 211 and the cover 213 may be integrally formed. The cover 213 is disposed opposite to the body 211, and has a shape and a structure corresponding to the body 211, so as to be mounted on the body 211. In the present embodiment, one end of the cover 213 defines a substantially rectangular opening 215.
Referring to fig. 3, in the present embodiment, the substrate 23 is a Printed Circuit Board (PCB), which may be made of dielectric material such as epoxy resin fiberglass (FR 4). The substrate 23 is disposed in the housing 21, and forms a first accommodating portion 231 and a second accommodating portion 233 together with the body 211 and the cover 213. The substrate 23 and the cover 213 together form the first accommodating portion 231. The base plate 23 and the body 211 together form the second accommodating portion 233. The first accommodating portion 231 and the second accommodating portion 233 are used for accommodating electronic components or circuit modules such as the antenna structure 100, the substrate 23, and the processing unit therein. The substrate 23 is further provided with a feeding point 235 and a ground plane (not shown) for feeding a current signal to the antenna structure 100 and providing a ground.
In this embodiment, the electronic device 200 includes at least three electronic components. Three of the electronic components may be a liquid crystal display module 25, a battery 27, and a function module 29, respectively. The lcd module 25 is disposed in the first accommodating portion 231, disposed on the substrate 23 and electrically connected to the substrate 23. The battery 27 is disposed in the second accommodating portion 233 for supplying power to the electronic device 200. The functional module 29 may be a key disposed in the first accommodating portion 231 and corresponding to the opening 215 of the cover 213 for partially exposing the opening 215. The functional module 29 is disposed opposite to the liquid crystal display module 25 and electrically connected to the substrate 23 to implement a specific function, such as a power on/off function.
Referring to fig. 1 again, the antenna structure 100 includes an antenna body 11, a feeding portion 13, an extending portion 15, a first grounding portion 17, and a second grounding portion 18.
In the present embodiment, the size of the antenna body 11 is approximately 6.3mm 16mm 2.4 mm. The antenna body 11 is made of a metal material. The antenna body 11 may be directly formed on the outer surface of the housing 21 by using a Laser Direct Structuring (LDS) technique.
In this embodiment, the antenna body 11 is disposed at the end or the bottom of the cover 213 to partially cover the cover 213, for example, partially wrap the bottom of the cover 213. The antenna body 11 includes a top 111, a first side 112, a second side 113, and an end 115. The first side portion 112 and the second side portion 113 are disposed opposite to each other and parallel to each other, and are respectively vertically connected to two ends of the end portion 115. The first side portion 112, the second side portion 113 and the end portion 115 are disposed on the periphery of the top portion 111, and are disposed substantially perpendicular to the top portion 111.
The antenna body 11 is further provided with a slot 117. In this embodiment, the slot 117 is opened at a position of the top 111 adjacent to the first side portion 112, and extends along a direction parallel to the end portion 115 and close to the second side portion 113 until the slot extends to block the second side portion 113. That is, the slot 117 is disposed only on the top portion 111 and one side portion (e.g., the second side portion 113) thereof, and does not extend to the other side portion (e.g., the first side portion 112). In addition, in this embodiment, the slot 117 is substantially straight, and a portion of the slot 117 located on the top 111 is substantially parallel to the end portion 115.
Of course, it is understood that when the antenna body 11 partially covers the bottom of the cover 213, the middle position of the slot 117 may also extend in a direction parallel to the first side 112, and close to the end 115 and away from the end 115, respectively, thereby enlarging the slot 117, so that the shape and structure of the middle portion of the slot 117 cooperate with the functional module 29, and the functional module 29 may be partially exposed from the middle position of the opening 215 and the slot 117 in sequence.
The feeding portion 13 is disposed in the first accommodating portion 231. The feeding part 13 includes a first feeding segment 131, a connecting segment 133 and a second feeding segment 135 connected in sequence. The first feeding segment 131 is substantially in the shape of a straight strip, one end of which is electrically connected to the feeding point 235, and the other end of which extends in a direction parallel to the end portion 115 and close to the top portion 111. One end of the connecting segment 133 is perpendicularly connected to an end of the first feeding segment 131 away from the feeding point 235, and extends in a direction parallel to the top 111 and close to the end 115 until crossing the slot 117. The second feeding segment 135 is substantially in the shape of a straight bar, and one end of the second feeding segment is vertically connected to one end of the connecting segment 133 away from the first feeding segment 131, and continues to extend in a direction parallel to the end portion 115 and close to the top portion 111. Thus, the first feeding segment 131 and the second feeding segment 135 are respectively disposed at two sides of the slot 117, and the connecting segment 133 crosses the slot 117. The end of the second feeding segment 135 away from the connecting segment 133 is further electrically connected to the antenna body 11, for example, by forming a via hole (not shown) on the cover 213. In this way, the second feeding segment 135 can pass through the via hole by using a feeding line to be electrically connected to the antenna body 11, so as to feed the current signal to the antenna body 11.
The extending portion 15 is substantially rectangular sheet-shaped, is disposed in the second accommodating portion 233, and is substantially parallel to the base plate 23. The extending portion 15 and the feeding portion 13 are respectively disposed on two sides of the substrate 23.
The first grounding portion 17 is substantially rectangular plate-shaped, and is disposed in the first accommodating portion 231 and located between the feeding portion 13 and the liquid crystal display module 25. The first ground portion 17 is entirely located in a plane perpendicular to the substrate 23. One end of the first ground portion 17 is electrically connected to the ground plane of the substrate 23 and extends in a direction parallel to the end portion 115 and close to the top portion 111.
The second grounding portion 18 is substantially rectangular plate-shaped, and is disposed in the second accommodating portion 233 and between the extending portion 15 and the battery 27. The second ground portion 18 is entirely located in a plane perpendicular to the substrate 23. One end of the second grounding portion 18 is electrically connected to the extension portion 15, and extends along a direction perpendicular to the extension portion 15 and toward the substrate 23 until being electrically connected to the ground plane of the substrate 23, so as to provide a ground for the extension portion 15.
When the current is fed from the feeding point 235, the current flows through the feeding portion 13 and couples with the slot 117 of the antenna body 11, so that the antenna body 11 forms a BT/WIFI antenna, and further excites a corresponding BT/WIFI mode (2.4-2.48 GHz). The extension portion 15 can effectively improve the radiation efficiency of the antenna structure 100 when the electronic device 200 is worn on a user. In addition, since the middle position of the slot 117 can partially expose the functional module 29, the space of the antenna body 11 can be fully utilized, so that the antenna body 11 can effectively combine with the functional module 29, which is beneficial to the miniaturization of the electronic device 200.
Referring to fig. 4, it can be understood that, in the present embodiment, the antenna structure 100 further includes a matching circuit 19. The matching circuit 19 is disposed on the substrate 23, and one end of the matching circuit is electrically connected to the feeding point 235, and the other end of the matching circuit is electrically connected to the feeding portion 13, so as to optimize impedance matching of the antenna structure 100.
In the present embodiment, the matching circuit 19 includes a first matching element 191 and a second matching element 193. One end of the first matching element 191 is electrically connected to the feeding point 235, and the other end is electrically connected to the feeding part 13. One end of the second matching element 193 is electrically connected between the feeding point 235 and the first matching element 191, and the other end is grounded. In this embodiment, the first matching element 191 is a capacitor. The second matching element 193 is an inductor. The capacitance value of the first matching element 191 is 0.6 pF. The inductance value of the second matching element 193 is 3 nH. Of course, in other embodiments, the first matching element 191 and the second matching element 193 are not limited to the above-mentioned capacitance and inductance, but may be other inductances, capacitances or combinations thereof.
Fig. 5 is a graph illustrating S-parameters (scattering parameters) of the antenna structure 100. Wherein curve S51 is the value of S11 when the antenna structure 100 is not provided with the extension 15 and the electronic device 200 is not worn on the hand of the user. Curve S52 is the S11 value when the antenna structure 100 is provided with the extension 15 but the electronic device 200 is not worn on the user' S hand. Wherein curve S53 is the value of S11 when the antenna structure 100 is not provided with the extension 15 but the electronic device 200 is worn on a user' S hand. Curve S54 is the S11 value for the antenna structure 100 with the extension 15 and the electronic device 200 worn on the hand of the user. Obviously, the extension 15 of the antenna structure 100 is mainly used to prevent the frequency of the electronic device 200 from shifting when the electronic device is worn on the hand of the user.
Fig. 6 is a graph of the total radiation efficiency of the antenna structure 100. Wherein a curve S61 is a total radiation efficiency when the antenna structure 100 is not provided with the extension 15 and the electronic device 200 is not worn on a hand of a user. Curve S62 is the total radiation efficiency of the antenna structure 100 when provided with the extension 15 but the electronic device 200 is not worn on the user' S hand. Wherein curve S63 is the total radiation efficiency of the antenna structure 100 when the extension 15 is not provided, but the electronic device 200 is worn on the hand of the user. Curve S64 is the total radiation efficiency of the antenna structure 100 with the extension 15 and the electronic device 200 worn on the hand of the user.
Referring to table 1, table 1 is a radiation efficiency table of the antenna structure 100 under different conditions.
Obviously, the antenna structure 100 and the electronic device 200 having the antenna structure 100 of the present invention are provided with the slot 117 on the antenna body 11. Therefore, the antenna body 11 can work in the BT/WIFI mode (2.4-2.48GHz) without setting a corresponding clearance zone. Furthermore, the antenna structure 100 can effectively improve the radiation efficiency (about 2dB improvement) when the electronic device 200 is worn on the hand of the user by providing the extension portion 15. In addition, the slot 117 can be matched with the opening 215 on the shell 21, so that the functional module 29 of the electronic device 200 is partially exposed from the opening 215 and the slot 117. Thus, the antenna body 11 and the functional module 29 can be effectively combined, so that the space of the electronic device 200 is fully utilized, which is beneficial to the miniaturization of the electronic device 200.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention. Those skilled in the art can also make other changes and the like in the design of the present invention within the spirit of the present invention as long as they do not depart from the technical effects of the present invention. Such variations are intended to be included within the scope of the invention as claimed.
Claims (12)
1. An antenna structure, characterized by: the antenna structure comprises an antenna body, a feed-in part, an extension part, a first grounding part and a second grounding part, the antenna body is provided with a slot, the extension part and the antenna body are arranged at intervals, the feed-in part is arranged between the antenna body and the extension part, one end of the feed-in part is electrically connected to a feed-in point, the other end crosses the slot and is electrically connected with the antenna body, the first grounding part and the second grounding part are respectively arranged on two sides of a substrate for feeding current signals into the antenna body, one end of the first grounding part is electrically connected to the grounding surface of the substrate, and the second grounding part extends along the direction which is vertical to the substrate and is close to the antenna body, one end of the second grounding part is electrically connected to the extending part and extends along the direction which is vertical to and is close to the substrate until the second grounding part is electrically connected with the grounding surface.
2. The antenna structure of claim 1, characterized in that: the antenna body comprises a top, a first side, a second side and an end, wherein the first side and the second side are opposite and parallel to each other and are respectively connected to two ends of the end, the first side, the second side and the end are all arranged on the periphery of the top and are approximately perpendicular to the top, the slot is arranged at a position, close to the first side, of the top and extends along a direction parallel to the end and close to the second side until the slot extends to block the second side.
3. The antenna structure of claim 2, characterized in that: the middle position of the slot is respectively extended along the direction parallel to the first side part, close to the end part and far away from the end part so as to enlarge the slot.
4. The antenna structure of claim 2, characterized in that: the feed-in part comprises a first feed-in section, a connecting section and a second feed-in section which are sequentially connected, one end of the first feed-in section is electrically connected to the feed-in point and extends along a direction parallel to the end part and close to the top part, one end of the connecting section is vertically connected to one end of the first feed-in section, far away from the feed-in point, and extends along a direction parallel to the top part and close to the end part until crossing the slot, and one end of the second feed-in section is vertically connected to one end of the connecting section, far away from the first feed-in section, continues to extend along a direction parallel to the end part and close to the top part, and is electrically connected with the antenna body.
5. The antenna structure of claim 1, characterized in that: the antenna structure further comprises a matching circuit, wherein one end of the matching circuit is electrically connected to the feed-in point, and the other end of the matching circuit is electrically connected to the feed-in part, so that the impedance matching of the antenna structure is optimized.
6. The antenna structure of claim 5, characterized in that: the matching circuit comprises a first matching element and a second matching element, one end of the first matching element is electrically connected to the feed-in point, the other end of the first matching element is electrically connected to the feed-in part, one end of the second matching element is electrically connected between the feed-in point and the first matching element, and the other end of the second matching element is grounded.
7. An electronic device comprising an antenna structure as claimed in any one of claims 1, 5-6.
8. The electronic device of claim 7, wherein: the electronic device further comprises a shell and a substrate, wherein the antenna body is arranged on the outer surface of the shell, the substrate is arranged in the shell, and the feed-in part and the extension part are arranged in the shell and are respectively arranged on two sides of the substrate.
9. The electronic device of claim 8, wherein: the electronic device further comprises a liquid crystal display module, a battery and a functional module, wherein the liquid crystal display module, the functional module and the feed-in part are all arranged in the first accommodating part, and the battery and the extension part are all arranged in the second accommodating part.
10. The electronic device of claim 9, wherein: the cover body is provided with an opening corresponding to the functional module, so that the functional module is partially exposed from the opening.
11. The electronic device of claim 10, wherein: the antenna body comprises a top part, a first side part, a second side part and an end part, wherein the first side part and the second side part are opposite and are arranged in parallel, and are respectively connected to two ends of the end portion, the first side portion, the second side portion and the end portion are all arranged on the periphery of the top portion and are approximately perpendicular to the top portion, the slot is opened at the position of the top portion, which is adjacent to the first side portion, and extends along a direction parallel to the end part and close to the second side part until the second side part is separated, the antenna body is arranged at the bottom of the cover body, and partially covers the bottom of the cover body, the middle position of the slot extends along the direction parallel to the first side part, close to the end part and far away from the end part respectively so as to enlarge the slot, and then corresponds to the opening hole, so that the functional module is exposed from the opening hole and the middle part of the slot.
12. The electronic device of claim 9, wherein: the first grounding portion is disposed in the first receiving portion, and the second grounding portion is disposed in the second receiving portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711207130.2A CN109841955B (en) | 2017-11-27 | 2017-11-27 | Antenna structure and electronic device with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711207130.2A CN109841955B (en) | 2017-11-27 | 2017-11-27 | Antenna structure and electronic device with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109841955A CN109841955A (en) | 2019-06-04 |
| CN109841955B true CN109841955B (en) | 2021-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711207130.2A Active CN109841955B (en) | 2017-11-27 | 2017-11-27 | Antenna structure and electronic device with same |
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| CN (1) | CN109841955B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531905A (en) * | 2012-07-06 | 2014-01-22 | 宏碁股份有限公司 | Electronic device |
| TWI550951B (en) * | 2012-07-06 | 2016-09-21 | 群邁通訊股份有限公司 | Antenna assembly and wireless communication device employing same |
| TWI587571B (en) * | 2012-10-31 | 2017-06-11 | 群邁通訊股份有限公司 | Antenna assembly |
| CN205081233U (en) * | 2015-10-22 | 2016-03-09 | 广东欧珀移动通信有限公司 | Duplex feeding antenna structure of lid after all -metal |
| TWI608653B (en) * | 2016-03-31 | 2017-12-11 | 泓博無線通訊技術有限公司 | Terminal device |
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