Antenna structure and touch control pen with same
阅读说明:本技术 天线结构及具有该天线结构的触控笔 (Antenna structure and touch control pen with same ) 是由 赖志宏 于 2018-06-21 设计创作,主要内容包括:一种天线结构,包括本体、第一辐射部及第二辐射部,所述第一辐射部与第二辐射部相对设置,所述本体涵盖所述第一辐射部及第二辐射部于其中,所述第一辐射部电性连接至馈入源以馈入电流,电流沿所述第一辐射部流动以激发第一模态的辐射信号,所述本体从所述第一辐射部耦合获取电流,所述第二辐射部从所述本体耦合获取电流,电流沿所述第一辐射部、本体及第二辐射部流动并接地以激发第二模态的辐射信号。还提供一种具有该天线结构的触控笔。(An antenna structure comprises a body, a first radiation part and a second radiation part, wherein the first radiation part and the second radiation part are arranged oppositely, the body covers the first radiation part and the second radiation part, the first radiation part is electrically connected to a feed-in source to feed in current, the current flows along the first radiation part to excite a radiation signal of a first mode, the body obtains the current from the first radiation part in a coupling mode, the second radiation part obtains the current from the body in a coupling mode, and the current flows along the first radiation part, the body and the second radiation part and is grounded to excite a radiation signal of a second mode. A touch control pen with the antenna structure is also provided.)
1. An antenna structure, characterized by: the antenna structure comprises a body, a first radiation part and a second radiation part, wherein the first radiation part and the second radiation part are arranged oppositely, the body covers the first radiation part and the second radiation part, the first radiation part is electrically connected to a feed-in source to feed in current, the current flows along the first radiation part to excite a radiation signal of a first mode, the body obtains the current from the first radiation part in a coupling mode, the second radiation part obtains the current from the body in a coupling mode, and the current flows along the first radiation part, the body and the second radiation part and is grounded to excite a radiation signal of a second mode.
2. The antenna structure of claim 1, characterized in that: the body is a hollow cylindrical cover body, and the body cover is arranged at one end of a touch pen.
3. The antenna structure of claim 2, characterized in that: the first radiation part comprises a first arm, a second arm and a third arm which are sequentially connected, the first arm is arc-shaped and parallel to the body, one end of the second arm is vertically connected to the middle of the first arm, one end of the third arm is vertically connected to one end, far away from the first arm, of the second arm, and one end, far away from the second arm, of the third arm is electrically connected to the feed-in source and used for feeding current from the feed-in source.
4. The antenna structure of claim 3, characterized in that: the second radiation part comprises a fourth arm, a fifth arm and a sixth arm which are sequentially connected, the fourth arm is arc-shaped and parallel to the body, one end of the fifth arm is perpendicularly connected to the middle of the fourth arm, one end of the sixth arm is perpendicularly connected to one end of the fifth arm, which is far away from the fourth arm, and the other end of the sixth arm is grounded.
5. The antenna structure of claim 4, characterized in that: the antenna structure further comprises a matching circuit, wherein the matching circuit comprises a first capacitor, an inductor, a second capacitor and a third capacitor, one end of the first capacitor is electrically connected to the feed-in source, the other end of the first capacitor is electrically connected to one end of the second capacitor, the other end of the second capacitor is electrically connected to the first radiation part, one end of the inductor is electrically connected between the first capacitor and the second capacitor, the other end of the inductor is grounded, one end of the third capacitor is electrically connected to the second radiation part, and the other end of the third capacitor is grounded.
6. The antenna structure of claim 1, characterized in that: the first mode is a WiFi 2.4G mode, the second mode is a WiFi 5G mode, and the frequency of a radiation signal excited by the second mode is higher than that excited by the first mode.
7. A stylus, comprising: the stylus pen comprises a pen holder and the antenna structure as claimed in any one of claims 1 to 6, the antenna structure being carried on a pen end of the pen holder.
8. The stylus of claim 7, wherein: the touch control pen further comprises a gasket and an isolation cover, wherein the gasket is in a cylindrical ring shape and is connected to the pen end along the extension direction of the pen holder, and the gasket is made of insulating materials; the isolation cover is a hollow cylindrical cover body, is connected to one end, far away from the pen end, of the gasket along the extending direction of the pen holder, and is made of insulating materials.
9. The stylus of claim 8, wherein: the stylus pen further comprises a first circuit board, a second circuit board and a connecting flat cable, wherein the first circuit board and the second circuit board are parallel to each other and are vertically arranged at the pen end at intervals, the connecting flat cable is connected between the first circuit board and the second circuit board through wires, antenna clearance areas are respectively arranged on the first circuit board and the second circuit board, and the feeding source is arranged on the first circuit board.
10. The stylus of claim 9, wherein: the antenna headroom includes first headroom and second headroom, first headroom set up in on the first circuit board, first headroom set up in the first circuit board is kept away from the one end of pen-hold with between the third arm, the second headroom set up in on the second circuit board, the second headroom set up in the second circuit board is kept away from the one end of pen-hold with between the sixth arm, first headroom and second headroom do not be the region that does not contain any conductor on first circuit board and the second circuit board, first headroom and second headroom have the same size and shape.
11. The stylus of claim 8, wherein: the isolation cover comprises an outer peripheral wall and an inner peripheral wall, the body is a hollow cylindrical cover body, the shape and the size of the isolation cover are approximately the same, the body cover is arranged on the outer peripheral wall of the isolation cover, the diameter of the body is equal to the outer diameter of the gasket, so that the pen holder, the gasket and the body are connected in a continuous cylindrical shape.
12. The stylus of claim 11, wherein: the first arm of the first radiation part and the fourth arm of the second radiation part are both arranged on the inner peripheral wall of the isolation cover.
Technical Field
The invention relates to an antenna structure and a touch control pen with the same.
Background
With the advancement of wireless communication technology, many portable electronic devices with touch screens, such as mobile phones, tablet computers and personal digital assistants, are equipped with a stylus. However, the size of the stylus pen is usually small to facilitate carrying with the portable electronic device, but the design of the antenna is limited due to the limited space, and the single-frequency antenna is usually used as the main design, so that the effect of the dual-frequency antenna is difficult to achieve. In addition, the limited space of the stylus also limits the height of the antenna and the arrangement of a clearance area, and the radiation efficiency of the antenna is influenced to a certain extent.
Disclosure of Invention
Accordingly, there is a need for an antenna structure and a stylus pen having the same.
An antenna structure comprises a body, a first radiation part and a second radiation part, wherein the first radiation part and the second radiation part are arranged oppositely, the body covers the first radiation part and the second radiation part, the first radiation part is electrically connected to a feed-in source to feed in current, the current flows along the first radiation part to excite a radiation signal of a first mode, the body obtains the current from the first radiation part in a coupling mode, the second radiation part obtains the current from the body in a coupling mode, and the current flows along the first radiation part, the body and the second radiation part and is grounded to excite a radiation signal of a second mode.
A touch pen comprises a pen holder and the antenna structure, wherein the antenna structure is borne on a pen end of the pen holder.
The stylus pen is provided with the first radiation part, the second radiation part and the body in a small space of the pen end to form a dual-frequency antenna, so that the ductility of the antenna is increased, high antenna radiation efficiency is obtained, and wireless signal transmission application of the stylus pen is optimized.
Drawings
Fig. 1 is a schematic diagram of a stylus according to a preferred embodiment of the invention.
Fig. 2 is an exploded perspective view of the stylus pen with the antenna structure shown in fig. 1.
Fig. 3 is an exploded perspective view of the stylus shown in fig. 2 from another angle.
Fig. 4 is a partial plan view of the antenna structure shown in fig. 2.
Fig. 5 is a circuit diagram of a matching circuit according to a preferred embodiment of the invention.
Fig. 6 is a return loss curve diagram of the antenna structure according to the preferred embodiment of the present invention.
Fig. 7 is a graph of radiation efficiency when the antenna structure of the preferred embodiment of the present invention is in operation.
Description of the main elements
Touch
Outer
Inner
The
The
Matching
First capacitor C1
Second capacitance C2
Third capacitor C3
Inductor L
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, for example, by wires, or by contactless connection, for example, 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.
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
Referring to fig. 2 and 3, the
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The
Referring to fig. 2, 3 and 4, the
Referring to fig. 2 and fig. 3, the
The
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The antenna headroom includes a
Referring to fig. 5, the
The
In this embodiment, the length of the
Fig. 6 is a Return Loss (Return Loss) graph of the
Fig. 7 is a graph of radiation efficiency (radiation efficiency) of the
In summary, the
The
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.
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