Antenna device of active pen and active pen

Abstract

The invention provides an antenna device of an active pen and the active pen, the antenna device comprises a first antenna unit, the first antenna unit comprises a first support, a first antenna radiation part and a first feed part, the first feed part is connected with the first antenna radiation part, and the first antenna radiation part is bent and wraps the surface of the first support. On the premise of ensuring that the active pen antenna meets the communication performance, the design of the antenna device can reduce the physical size of the antenna so as to adapt to the compact internal space of the active pen.

Description

Technical Field

[0001] The present application relates to the field of active pens, and more specifically, to an antenna device of an active pen and an active pen. Background Art

[0002] With the continuous development of mobile devices and intelligent interactive technology, active pens, as an important input tool, have become essential equipment in many fields such as education, design, and office. The active pen connects to smart devices through a built-in wireless communication module to achieve data transmission and remote control functions. In this process, the importance of antenna design is self-evident, which directly affects the communication performance, stability, and user experience of the active pen. Therefore, how to design the antenna in the active pen to improve the performance of the active pen is a technical problem that needs to be solved urgently. Summary of the invention

[0003] The present application provides an antenna device and an active pen of an active pen, and aims to minimize the size of the antenna device by bending the antenna radiating portion in the antenna device of the active pen, while ensuring that the active pen antenna meets the required communication performance, so as to adapt to the compact internal space of the active pen.

[0004] In a first aspect, an antenna device for an active pen is provided, comprising a first antenna unit, wherein the first antenna unit comprises a first bracket, a first antenna radiating portion and a first feeding portion, wherein the first feeding portion is connected to the first antenna radiating portion, and the first antenna radiating portion is bent and wrapped around the surface of the first bracket.

[0005] Through the technical solution of the embodiment of the present application, through the bending design of the first antenna radiating portion, the antenna device formed can be designed to reduce the physical size of the antenna to adapt to the compact internal space of the active pen while ensuring that the active pen antenna meets the required communication performance, compared with a flat and unbending antenna device.

[0006] In some possible implementations, the first bracket is a polyhedron structure, and the first antenna radiating portion is bent and covered on at least two surfaces of the first bracket.

[0007] Through the technical solution of the embodiment of the present application, when the first bracket is a polyhedron, the first antenna radiating portion is bent to cover at least two surfaces of the first bracket. By bending, the volume of the antenna can be reduced while ensuring the performance of the antenna device.

[0008] In some possible implementations, the first antenna radiating portion surrounds and covers four surfaces of the first bracket, and a gap is formed between two ends of the first antenna radiating portion in the surrounding direction.

[0009] Through the technical solution of the embodiment of the present application, the first antenna radiating portion is surrounded and covered on the four surfaces of the first bracket. Compared with the method in which the antenna radiating portion is flat and not bent, this method in the present application can better reduce the volume of the antenna. In addition, there is a gap between the two ends of the first antenna radiating portion in the surrounding direction, which can enable the antenna device to form two antenna radiation paths. The superposition of the two antenna radiation paths can obtain a larger antenna bandwidth, and maintaining a gap at both ends can reduce the mutual interference of the two antenna radiation paths.

[0010] In some possible embodiments, the antenna device further includes a substrate, which is arranged opposite to the first surface of the first bracket, the first radiation area of ​​the first antenna radiating portion is attached to the first surface of the first bracket, and the first feeding portion is connected to the first radiation area of ​​the first antenna radiating portion.

[0011] Through the technical solution of the embodiment of the present application, the first feeding part is connected to the first radiation area of ​​the first antenna radiating part, so that the first feeding part of the antenna device begins to form two antenna radiation paths respectively. The first feeding part converts the radio frequency signal into current, and these currents flow on the two antenna radiation paths to generate a changing electromagnetic field, and finally form an electromagnetic wave that propagates outward.

[0012] In some possible implementations, the second surface and the third surface of the first bracket are adjacent to the first surface, and the second radiation area and the third radiation area connected to the first radiation area of ​​the first antenna radiation part are attached to the second surface and the third surface of the first bracket respectively.

[0013] Through the technical solution of the embodiment of the present application, the second radiation zone and the third radiation zone are respectively attached to the second surface and the third surface of the first bracket, that is, the second radiation zone and the third radiation zone of the first antenna radiation part are relatively arranged, so that the first antenna radiation part is at least covered by three surfaces of the first bracket, and the first radiation zone, the second radiation zone and the third radiation zone are connected to form two antenna radiation paths.

[0014] In some possible embodiments, the fourth surface of the first bracket is opposite to the first surface, the fourth radiation zone connected to the second radiation zone of the first antenna radiation portion and the fifth radiation zone connected to the third radiation zone are attached to the fourth surface of the first bracket, and there is a gap between the fourth radiation zone and the fifth radiation zone.

[0015] Through the technical solution of the embodiment of the present application, the first antenna radiating portion is attached to the fourth surface of the first bracket to form a fourth radiation area and a fifth radiation area, so that the antenna device can form two antenna radiation paths. The superposition of the two antenna radiation paths can obtain a larger antenna bandwidth, and maintaining a gap at both ends can reduce the mutual interference of the two antenna radiation paths.

[0016] In some possible embodiments, the first feed portion, the first radiation zone, the second radiation zone and the fourth radiation zone form a first radiation path of the first antenna unit, and the first feed portion, the first radiation zone, the third radiation zone and the fifth radiation zone form a second radiation path of the first antenna unit, wherein the bandwidth of the first antenna unit is determined according to the operating frequencies of the first radiation path and the second radiation path.

[0017] Through the technical solution of the embodiment of the present application, the first feeding part forms two antenna radiation paths with the radiation area of ​​the first antenna radiating part respectively. The electromagnetic waves formed by the two antenna radiation paths are superimposed to form the bandwidth of the antenna device. The antenna device can increase the bandwidth of the antenna, and can improve the performance, flexibility and reliability of the wireless communication system in the active pen.

[0018] In some possible implementations, sizes of the first radiation path and the second radiation path are determined according to a dielectric constant of the first support.

[0019] Through the technical solution of the embodiment of the present application, the current generated by the first feeding part flows in the first radiation path and the second radiation path, and the first radiation path and the second radiation path flow along the first bracket. The medium with a high dielectric constant can reduce the physical size of the antenna because the electromagnetic wave propagation speed in the medium is slower and the wavelength is shorter.

[0020] In some possible implementations, the size of the first radiation path and the second radiation path ranges from 4 cm to 15 cm.

[0021] In some possible embodiments, the antenna device also includes a support member, which is arranged between the first radiation zone of the first antenna radiation portion and the substrate, the support member is attached to a portion of the first radiation zone, and the first feeding portion is connected to another portion of the first radiation zone and is located on one side of the support member.

[0022] Through the technical solution of the embodiment of the present application, a support member is arranged between the first antenna radiating portion and the substrate to support the first antenna radiating portion.

[0023] In some possible implementations, the antenna device further includes a first ground feed portion connected between the first radiation area of ​​the first antenna radiation portion and the substrate.

[0024] Through the technical solution of the embodiment of the present application, by setting the first feeding part and the first ground feeding part, the antenna device is an inverted-F antenna (IFA). The IFA has a compact design and good performance. When used in an active pen, it can better perform antenna transmission.

[0025] In some possible implementations, the antenna device further includes a second antenna unit, which includes a second bracket, a second antenna radiating portion, and a second feeding portion, the second feeding portion is connected to the second antenna radiating portion, and the second antenna radiating portion is bent and wrapped around the surface of the second bracket.

[0026] Through the technical solution of the embodiment of the present application, in the active pen, there is only one antenna unit that can only locate the position of the active pen relative to the host, and cannot identify the placement angle of the active pen relative to the host. When the active pen includes two antennas, the host can identify the placement angle of the active pen by calculating the position difference of the two antennas at the end of the active pen. In addition, the bending design of the second antenna unit can ensure that the active pen antenna meets the required communication performance. The design of the antenna device can reduce the physical size of the antenna to adapt to the compact internal space of the active pen.

[0027] In some possible implementations, the first antenna unit and the second antenna unit are disposed at the end of the active pen in a mirror-image manner, and a line between the first antenna unit and the second antenna unit is perpendicular to the central axis of the active pen.

[0028] Through the technical solution of the embodiment of the present application, the mirror setting can enhance the radiation in a specific direction, thereby improving the directivity of the antenna device. In addition, the mirror setting can improve the impedance matching of the antenna. Due to the introduction of the second antenna unit mirrored with the first antenna unit, the input impedance of the first antenna unit can be changed to be closer to the characteristic impedance of the transmission line, thereby reducing the reflection coefficient and improving the transmission efficiency.

[0029] In some possible implementations, the first antenna unit and the second antenna unit are disposed on the same support member, and the first feeding portion of the first antenna unit and the second feeding portion of the second antenna unit are respectively located on two opposite sides of the support member.

[0030] Through the technical solution of the embodiment of the present application, the support member is used to support the first antenna unit and the second antenna unit.

[0031] In some possible implementations, a surface of the first bracket facing the housing of the active pen matches the shape of the housing.

[0032] Through the technical solution of the embodiment of the present application, the side of the first bracket facing the shell of the active pen matches the shape of the shell to better utilize the limited space inside the active pen. In addition, the side of the first bracket facing the shell of the active pen matches the shape of the shell to improve the mechanical stability of the antenna device and reduce the risk of damage caused by vibration or impact.

[0033] In some possible implementations, a surface of the first bracket facing the housing of the active pen is a curved surface.

[0034] Through the technical solution of the embodiment of the present application, the side of the first bracket facing the shell of the active pen is designed to be a curved surface so as to better cooperate with the active pen and better utilize the limited space inside the active pen.

[0035] In some possible implementations, the first antenna radiating portion includes a flexible printed circuit (FPC) or a metal circuit printed on the surface of the first bracket.

[0036] In some possible implementations, the antenna device includes an ultra-wideband (UWB) antenna.

[0037] In a second aspect, an antenna device for an active pen is provided, comprising a first antenna unit and a second antenna unit, wherein the first antenna unit and the second antenna unit are mirror-imaged at the ends of the active pen, and a line between the first antenna unit and the second antenna unit is perpendicular to the central axis of the active pen.

[0038] Through the technical solution of the embodiment of the present application, in the active pen, there is only one antenna unit that can only locate the position of the active pen relative to the host, and cannot identify the placement angle of the active pen relative to the host. When the active pen includes two antennas, the host can identify the placement angle of the active pen by calculating the position difference of the two antennas at the end of the active pen. In addition, the bending design of the second antenna unit can reduce the physical size of the antenna to adapt to the compact internal space of the active pen while ensuring that the active pen antenna meets the required communication performance. In addition, the mirror setting can enhance the radiation in a specific direction, thereby improving the directivity of the antenna device. In addition, the mirror setting can improve the impedance matching of the antenna. Due to the introduction of the second antenna unit that is mirrored with the first antenna unit, the input impedance of the first antenna unit can be changed to be closer to the characteristic impedance of the transmission line, thereby reducing the reflection coefficient and improving the transmission efficiency.

[0039] In some possible embodiments, the first antenna unit includes a first feeding part, the second antenna unit includes a second feeding part, the first antenna unit and the second antenna unit are arranged on the same support member, and the first feeding part and the second feeding part are respectively located on opposite sides of the support member.

[0040] Through the technical solution of the embodiment of the present application, the support member is used to support the first antenna unit and the second antenna unit.

[0041] In some possible embodiments, the first antenna unit also includes a first bracket and a first antenna radiating portion, the first feeding portion is connected to the first antenna radiating portion, and the first antenna radiating portion is bent and covered on the surface of the first bracket; the second antenna unit also includes a second bracket and a second antenna radiating portion, the second feeding portion is connected to the second antenna radiating portion, and the second antenna radiating portion is bent and covered on the surface of the second bracket.

[0042] Through the technical solution of the embodiment of the present application, through the bending design of the first antenna radiating portion and the second antenna radiating portion, the antenna device formed can be designed to reduce the physical size of the antenna to adapt to the compact internal space of the active pen while ensuring that the active pen antenna meets the required communication performance, compared with a flat and unbending antenna device.

[0043] In some possible embodiments, the first bracket is a polyhedral structure, and the first antenna radiating portion is bent and covered on at least two surfaces of the first bracket; the second bracket is a polyhedral structure, and the second antenna radiating portion is bent and covered on at least two surfaces of the second bracket.

[0044] Through the technical solution of the embodiment of the present application, when the first bracket and the second bracket are polyhedron structures, the first antenna radiating portion and the second antenna radiating portion are bent to cover at least two surfaces of the bracket. By bending, the volume of the antenna can be reduced while ensuring the performance of the antenna device.

[0045] In some possible embodiments, the first antenna radiating portion is surrounded and covered by the four surfaces of the first bracket, and there is a gap between the two ends of the first antenna radiating portion in the surrounding direction; the second antenna radiating portion is surrounded and covered by the four surfaces of the second bracket, and there is a gap between the two ends of the second antenna radiating portion in the surrounding direction.

[0046] Through the technical solution of the embodiment of the present application, the first antenna radiating portion and the second antenna radiating portion are respectively wrapped around the four surfaces of the first bracket and the second bracket. Compared with the method in which the antenna radiating portion is flat and not bent, this method in the present application can better reduce the volume of the antenna. In addition, for any antenna radiating portion, there is a gap between the two ends in the surrounding direction, so that the antenna device can form two antenna radiation paths. The superposition of the two antenna radiation paths can obtain a larger antenna bandwidth, and maintaining a gap at both ends can reduce the mutual interference of the two antenna radiation paths.

[0047] In some possible embodiments, the antenna device also includes a substrate, which is arranged opposite to the first surface of the first bracket, the first radiation area of ​​the first antenna radiating portion is attached to the first surface of the first bracket, and the first feeding portion is connected to the first radiation area of ​​the first antenna radiating portion; the substrate is arranged opposite to the fifth surface of the second bracket, the second radiation area of ​​the second antenna radiating portion is attached to the fifth surface of the second bracket, and the second feeding portion is connected to the sixth radiation area of ​​the second antenna radiating portion.

[0048] Through the technical solution of the embodiment of the present application, taking the first antenna unit as an example, the first feeding part is connected to the first radiation area of ​​the first antenna radiating part, so that the first feeding part of the antenna device begins to form two antenna radiation paths respectively, and the first feeding part converts the radio frequency signal into current. These currents flow on the two antenna radiation paths to generate a changing electromagnetic field, and finally form an electromagnetic wave that propagates outward.

[0049] In some possible embodiments, the second surface and the third surface of the first bracket are adjacent to the first surface, and the second radiation zone and the third radiation zone connected to the first radiation zone of the first antenna radiation portion are respectively attached to the second surface and the third surface of the first bracket; the sixth surface and the seventh surface of the second bracket are adjacent to the fifth surface, and the seventh radiation zone and the eighth radiation zone connected to the fifth radiation zone of the second antenna radiation portion are respectively attached to the sixth surface and the seventh surface of the second bracket.

[0050] Through the technical solution of the embodiment of the present application, taking the first antenna unit as an example, the second radiation zone and the third radiation zone are respectively attached to the second surface and the third surface of the bracket, that is, the second radiation zone and the third radiation zone of the first antenna radiation part are relatively arranged, so that the first antenna radiation part is at least covered by three surfaces of the bracket, and the first radiation zone, the second radiation zone and the third radiation zone are connected to form two antenna radiation paths.

[0051] In some possible embodiments, the fourth surface of the first bracket is opposite to the first surface, the fourth radiation zone connected to the second radiation zone of the first antenna radiation portion and the fifth radiation zone connected to the third radiation zone are attached to the fourth surface of the first bracket, and the fourth radiation zone and the fifth radiation zone have a gap; the eighth surface of the second bracket is opposite to the fifth surface, the ninth radiation zone connected to the seventh radiation zone of the second antenna radiation portion and the tenth radiation zone connected to the eighth radiation zone are attached to the eighth surface of the second bracket, and the ninth radiation zone and the tenth radiation zone have a gap.

[0052] Through the technical solution of the embodiment of the present application, taking the first antenna unit as an example, the first antenna radiating portion is attached to the fourth surface of the first bracket to form a fourth radiation area and a fifth radiation area, so that the antenna device can form two antenna radiation paths. The superposition of the two antenna radiation paths can obtain a larger antenna bandwidth, and maintaining a gap at both ends can reduce the mutual interference of the two antenna radiation paths.

[0053] In some possible embodiments, the first feeding portion, the first radiation zone, the second radiation zone and the fourth radiation zone form a first radiation path of the first antenna unit, the first feeding portion, the first radiation zone, the third radiation zone and the fifth radiation zone form a second radiation path of the first antenna unit, and the bandwidth of the first antenna unit is determined according to the operating frequencies of the first radiation path and the second radiation path; the second feeding portion, the seventh radiation zone, the seventh radiation zone and the ninth radiation zone form a third radiation path of the second antenna unit, the second feeding portion, the sixth radiation zone, the eighth radiation zone and the tenth radiation zone form a fourth radiation path of the second antenna unit, wherein the bandwidth of the second antenna unit is determined according to the operating frequencies of the third radiation path and the fourth radiation path.

[0054] Through the technical solution of the embodiment of the present application, taking the first antenna unit as an example, the first feeding part forms two antenna radiation paths with the radiation area of ​​the first antenna radiating part respectively, and the electromagnetic waves formed by the two antenna radiation paths are superimposed to form the bandwidth of the antenna device. The antenna device can increase the bandwidth of the antenna, and can improve the performance, flexibility and reliability of the wireless communication system in the active pen.

[0055] In some possible implementations, the sizes of the first radiation path and the second radiation path are determined according to the dielectric constant of the first bracket; and the sizes of the third radiation path and the fourth radiation path are determined according to the dielectric constant of the second bracket.

[0056] Through the technical solution of the embodiment of the present application, taking the first antenna unit as an example, the current generated by the first feeding part flows in the first radiation path and the second radiation path, and the first radiation path and the second radiation path flow along the first bracket. The medium with a high dielectric constant can reduce the physical size of the antenna because the electromagnetic wave propagation speed in the medium is slower and the wavelength is shorter.

[0057] In some possible implementations, the size of the first radiation path and the second radiation path ranges from 4 cm to 15 cm; the size of the third radiation path and the fourth radiation path ranges from 4 cm to 15 cm.

[0058] In some possible embodiments, the antenna device also includes a support member, the antenna device also includes a support member, the support member is arranged between the first radiation zone of the first antenna radiation portion and the substrate, the support member is attached to a portion of the first radiation zone, the first feeding portion is connected to another portion of the first radiation zone, and is located on one side of the support member; the support member is arranged between the sixth radiation zone of the second antenna radiation portion and the substrate, the support member is attached to a portion of the sixth radiation zone, the second feeding portion is connected to another portion of the sixth radiation zone, and is located on one side of the support member.

[0059] Through the technical solution of the embodiment of the present application, a support member is arranged between the first antenna radiating portion, the second antenna radiating portion and the substrate to support the first antenna radiating portion and the second antenna radiating portion.

[0060] In some possible embodiments, the first antenna unit also includes a first ground feed portion, which is connected between the first radiation area of ​​the first antenna radiation portion and the substrate; the second antenna unit also includes a second ground feed portion, which is connected between the sixth radiation area of ​​the second antenna radiation portion and the substrate.

[0061] Through the technical solution of the embodiment of the present application, by setting a feeding part and a ground feeding part in the antenna device, the antenna device is made into an IFA. The IFA has a compact design and good performance. When used in an active pen, antenna transmission can be better performed.

[0062] In some possible implementations, a side of the first bracket facing the shell of the active pen matches the shape of the shell; and a side of the second bracket facing the shell of the active pen matches the shape of the shell.

[0063] Through the technical solution of the embodiment of the present application, taking the first antenna unit as an example, the side of the first bracket facing the shell of the active pen matches the shape of the shell to better utilize the limited space inside the active pen. In addition, the side of the bracket facing the shell of the active pen matches the shape of the shell to improve the mechanical stability of the antenna device and reduce the risk of damage caused by vibration or impact.

[0064] In some possible implementations, a surface of the first bracket facing the housing of the active pen is a curved surface; and a surface of the second bracket facing the housing of the active pen is a curved surface.

[0065] Through the technical solution of the embodiment of the present application, taking the first antenna unit as an example, designing the side of the first bracket facing the shell of the active pen as a curved surface can better cooperate with the active pen to better utilize the limited space inside the active pen.

[0066] In some possible implementations, the first antenna radiating portion includes an FPC or a metal circuit printed on a surface of the first bracket; the second antenna radiating portion includes an FPC or a metal circuit printed on a surface of the second bracket.

[0067] In some possible implementations, the antenna device includes a UWB antenna.

[0068] In a third aspect, an active pen is provided, comprising a communication device and an antenna device as in the first aspect or an antenna device as in the second aspect, wherein the communication device sends and receives information via the antenna device. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1A schematic architecture diagram of an active pen applicable to an embodiment of the present application is shown.

[0070] Figure 2 A schematic structural diagram of an antenna device provided in an embodiment of the present application is shown.

[0071] Figure 3 A schematic structural diagram of another antenna device provided in an embodiment of the present application is shown.

[0072] Figure 4 A top view of an antenna device provided in an embodiment of the present application is shown.

[0073] Figure 5 A schematic structural diagram of another antenna device provided in an embodiment of the present application is shown.

[0074] Figure 6 A schematic structural diagram of another antenna device provided in an embodiment of the present application is shown.

[0075] Figure 7 A top view of another antenna device provided in an embodiment of the present application is shown.

[0076] Figure 8 A performance analysis diagram of the antenna device provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0077] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0078] The present application relates to the field of antenna devices for active pens, and realizes data transmission and remote control functions through the design of antenna devices. In this process, the design of antenna devices is particularly important, which directly affects the communication performance, stability and user experience of the active pen.

[0079] Figure 1 A schematic structural diagram of an active pen 10 applicable to an embodiment of the present application is shown.

[0080] like Figure 1 As shown, the active pen 10 includes an antenna device 11 , a flying mouse function button 12 , a main printed circuit board assembly (PCBA) 13 , a battery 14 and a pen tip 15 .

[0081] Antenna device 11: can be a built-in PCB antenna, a flexible antenna or an inverted F-type antenna. Antenna device 11 is used to transmit and receive wireless signals to achieve communication with a paired device.

[0082] Flying mouse function button 12: The flying mouse function in the flying mouse function button 12 is an additional function of the active pen 10, which allows the user to control the pointer of the computer or smart device by moving the active pen 10 in the air. Specifically, the flying mouse function usually uses a built-in accelerometer and a gyroscope to detect the movement of the active pen 10 in three-dimensional space. These sensors can capture the tilt, rotation and movement of the active pen 10 and convert these actions into pointer movement on the screen. In order to accurately capture the movement of the active pen 10, the active pen 10 uses sensor fusion technology to combine the data of the accelerometer and the gyroscope. The flying mouse function usually communicates wirelessly with the computer or smart device via Bluetooth or Wi-Fi to transmit control signals.

[0083] Main PCBA 13: The main PCBA 13 includes a microcontroller (MCU), a sensor, a wireless communication module, a power management, a memory, and an interface and a connector. Among them, the MCU is responsible for processing all input signals (such as pressure, acceleration, buttons, etc.) of the active pen 10, and executing the built-in firmware to realize the functions of the active pen 10, such as writing, touching, gesture recognition, etc. The sensor includes an accelerometer, a gyroscope, and a pressure sensor. The accelerometer is used to detect the acceleration and tilt angle of the active pen 10. The gyroscope is used to measure the rotation speed of the active pen 10 for the flying mouse function and gesture recognition. The pressure sensor is used to detect the pressure of the tip of the active pen 10 on the screen to achieve different thicknesses of pen strokes. The wireless communication module is usually a Bluetooth module for wireless communication with smart devices (such as smart phones, tablets, etc.). The wireless communication module can also include a Wi-Fi module to support a longer communication distance or a higher data transmission rate. The power management includes a battery interface and a power management chip (Integrated Circuit, IC), wherein the battery interface is connected to the built-in battery to provide power for the PCBA. The power management IC is responsible for managing the charge and discharge of the battery, as well as providing a stable power supply to other electronic components. The memory is used to store firmware and user data. The interface and connector are used to connect an external antenna to improve wireless communication performance.

[0084] Battery 14: usually a rechargeable lithium-ion or lithium-polymer battery. The battery 14 provides power to the active pen 10, and the battery capacity and battery life vary depending on the model.

[0085] The pen tip 15 is usually made of conductive rubber or special plastic to ensure accuracy and comfort when writing on the touch screen. The pen tip 15 is the part of the active pen 10 that contacts the touch screen and is used to transmit writing or touch signals.

[0086] In the antenna design of the active pen 10 , the active pen 10 is usually required to be light and compact, which brings space limitations to the antenna design. How to design an antenna with good performance in a limited space is a technical problem that needs to be solved urgently.

[0087] In some solutions, the antenna device 11 in the active pen 10 is set to a planar inverted-F type (PIFA). PIFA can effectively transmit and receive radio waves of a specific frequency for wireless communication and data transmission. However, the PIFA-type antenna is placed in the active pen 10, and the design of the planar radiation unit makes the volume of the antenna device 11 still relatively large.

[0088] In view of this, an embodiment of the present application provides an antenna device, which aims to minimize the size of the antenna device by bending the antenna radiating portion in the antenna device of the active pen 10, while ensuring that the antenna of the active pen 10 meets the required communication performance, so as to adapt to the compact internal space of the active pen.

[0089] Figure 2 A schematic structural diagram of an antenna device 11 provided in an embodiment of the present application is shown.

[0090] According to some embodiments of the present application, referring to Figure 2 , and please refer to Figure 3 to Figure 4 , Figure 3 FIG. 1 shows a schematic structural diagram of another antenna device 11 provided in an embodiment of the present application. Figure 4 The top view of an antenna device 11 provided in an embodiment of the present application is shown. The present application provides an antenna device 11 for an active pen, comprising a first antenna unit, the first antenna unit comprising a first bracket 111, a first antenna radiating portion 112 and a first feeding portion 113, the first feeding portion 113 is connected to the first antenna radiating portion 112, and the first antenna radiating portion 112 is bent and covered on the surface of the first bracket 111.

[0091] As shown in the figure, the X direction is the width direction of the first bracket 111 , the Y direction is the length direction of the first bracket 111 , and the Z direction is the height direction of the first bracket 111 .

[0092] The first antenna radiating portion 112 can convert the fed electric energy into electromagnetic waves and radiate them into space, or receive electromagnetic waves from space and convert them into electric energy. For example, the electric energy received by the first feeding portion 113 is converted into electromagnetic waves and radiated into space so that the antenna at the screen end can receive them. For another example, the antenna at the screen end sends electromagnetic waves, and the first antenna radiating portion 112 receives the electromagnetic waves and converts them into electric energy. The material of the first antenna radiating portion 112 can be metal, alloy, conductive polymer, ceramic, etc., which is not limited in the embodiments of the present application.

[0093] The first feeding portion 113 is used to transmit a radio frequency signal to the first antenna radiating portion 112 , or to receive a radio frequency signal from the first antenna radiating portion 112 .

[0094] The first antenna radiating portion 112 is bent and covered on the surface of the first bracket 111. The shape of the first bracket 111 can be a regular polyhedron, such as a regular tetrahedron, a regular hexahedron or a regular octahedron, etc., or an irregular polyhedron, such as Figure 2 The present application does not impose any limitation on the shape of the first bracket 111. The first antenna radiating portion 112 may be bent and covered on two or more surfaces of the first bracket 111.

[0095] Through the embodiment of the present application, by means of the bending design of the first antenna radiating portion 112, the antenna device 11 formed can be designed to reduce the physical size of the antenna to adapt to the compact internal space of the active pen 10 while ensuring that the antenna of the active pen 10 meets the required communication performance, compared to a flat and unbent antenna device.

[0096] According to some embodiments of the present application, optionally, reference may be made to Figures 2 to 4 The first bracket 111 is a polyhedron structure, and the first antenna radiating portion 112 is bent and covered on at least two surfaces of the first bracket 111 .

[0097] When the first bracket 111 is a polyhedral structure, the first antenna radiating portion 112 can be bent and wrapped around two surfaces of the first bracket 111, or bent and wrapped around three surfaces of the first bracket 111. Compared with a flat and unbent structure, the volume of the antenna device 11 can be saved, so that the active pen 10 is more adaptable.

[0098] When the first bracket 111 is a polyhedron, the first antenna radiating portion 112 is bent to cover at least two surfaces of the first bracket 111 . The bending design can reduce the volume of the antenna while ensuring the performance of the antenna device 11 .

[0099] According to some embodiments of the present application, optionally, continue to refer to Figures 2 to 4The first antenna radiator 112 surrounds and covers the four surfaces of the first bracket 111, and there is a gap between the two ends of the first antenna radiator 112 in the surrounding direction.

[0100] The first antenna radiating portion 112 is wrapped around the four surfaces of the first bracket 111. Compared with the method in which the antenna radiating portion is flat and not bent, this method in the present application can better reduce the volume of the antenna. In addition, there is a gap between the two ends of the first antenna radiating portion 112 in the surrounding direction, so that the antenna device 11 can form two antenna radiation paths. The superposition of the two antenna radiation paths can obtain a larger antenna bandwidth, and maintaining a gap at both ends can reduce the mutual interference of the two antenna radiation paths.

[0101] Figure 5 and Figure 6 The schematic diagrams of the structures of another antenna device 11 provided in the embodiments of the present application are respectively shown.

[0102] According to some embodiments of the present application, optionally, reference may be made to Figures 2 to 6 The antenna device 11 also includes a substrate 114, which is arranged opposite to the first surface of the first bracket 111 (not shown in the figure), the first radiation area 1125 of the first antenna radiation portion 112 is attached to the first surface of the first bracket 111, and the first feeding portion 113 is connected to the first radiation area 1125 of the first antenna radiation portion 112.

[0103] The first surface of the first bracket 111 is a surface close to the first feeding unit 113 and along the direction of the first bracket 111 (Z direction in the figure).

[0104] The first feeding portion 113 is connected to the first radiation area 1125 of the first antenna radiating portion 112, so that the first feeding portion 113 of the antenna device 11 begins to form two antenna radiation paths respectively. The first feeding portion 113 converts the radio frequency signal into current, and these currents flow on the two antenna radiation paths to generate a changing electromagnetic field, and finally form an electromagnetic wave that propagates outward.

[0105] According to some embodiments of the present application, optionally, reference may be made to Figures 2 to 6 The second surface and the third surface of the first bracket 111 are adjacent to the first surface, and the second radiation zone 1123 and the third radiation zone 1124 connected to the first radiation zone 1125 of the first antenna radiation portion 112 are respectively attached to the second surface (not shown in the figure) and the third surface (not shown in the figure) of the first bracket 111.

[0106] like Figure 2 As shown, the second radiation area 1123 and the third radiation area 1124 are two surfaces along the width direction (X direction in the figure) of the first bracket 111.

[0107] like Figure 3 As shown, the third radiation area 1124 is attached to the third surface of the first bracket 111 .

[0108] Through the technical solution of the embodiment of the present application, the second radiation zone 1123 and the third radiation zone 1124 are respectively attached to the second surface and the third surface of the first bracket 111, that is, the second radiation zone 1123 and the third radiation zone 1124 of the first antenna radiation portion 112 are relatively arranged, so that the first antenna radiation portion 112 is at least covered by three surfaces of the first bracket 111, and the first radiation zone 1125, the second radiation zone 1123 and the third radiation zone 1124 are connected to form two antenna radiation paths, wherein one of the two radiation paths is the first feeding portion 113, the first radiation zone 1125 and the third radiation zone 1124, and the other radiation path is the first feeding portion 113, the first radiation zone 1125 and the second radiation zone 1123.

[0109] According to some embodiments of the present application, optionally, reference may be made to Figures 2 to 6 The fourth surface of the first bracket 111 is opposite to the first surface, the fourth radiation zone 1121 connected to the second radiation zone 1123 of the first antenna radiation part and the fifth radiation zone 1122 connected to the third radiation zone 1124 are attached to the fourth surface of the first bracket 111, and there is a gap between the fourth radiation zone 1121 and the fifth radiation zone 1122.

[0110] Through the embodiment of the present application, the first antenna radiating portion 112 is attached to the fourth surface of the first bracket 111 to form the fourth radiation area 1121 and the fifth radiation area 1122, so that the antenna device 11 can form two antenna radiation paths. The superposition of the two antenna radiation paths can obtain a larger antenna bandwidth, and the gaps at both ends can reduce the mutual interference of the two antenna radiation paths. Among them, one of the two radiation paths is the first feeding portion 113, the first radiation area 1125, the third radiation area 1124 and the fifth radiation area 1122, and the other radiation path is the first feeding portion 113, the first radiation area 1125, the second radiation area 1123 and the fourth radiation area 1121.

[0111] According to some embodiments of the present application, optionally, the first feeding portion 113, the first radiation zone 1125, the second radiation zone 1123 and the fourth radiation zone 1121 form a first radiation path of the first antenna unit, and the first radiation zone 1125, the third radiation zone 1124 and the fifth radiation zone 1122 form a second radiation path of the first antenna unit, wherein the bandwidth of the first antenna unit is determined according to the operating frequencies of the first radiation path and the second radiation path.

[0112] Among them, the first feeding part 113 forms two antenna radiation paths with the radiation area of ​​the first antenna radiation part 112 respectively, and the electromagnetic waves formed by the two antenna radiation paths are superimposed to form the bandwidth of the antenna device. The antenna device 11 can increase the bandwidth of the antenna, and can improve the performance, flexibility and reliability of the wireless communication system in the active pen 10.

[0113] According to some embodiments of the present application, optionally, the size of the first radiation path and the second radiation path may be determined according to the dielectric constant and / or size of the first bracket 111. For example, the gap between the fourth radiation zone 1121 and the fifth radiation zone 1122 may be determined according to the dielectric constant and / or size of the first bracket 111. The larger the size of the first bracket 111, the larger the gap between the fourth radiation zone 1121 and the fifth radiation zone 1122 may be. The larger the dielectric constant of the first bracket 111, the larger the gap between the fourth radiation zone 1121 and the fifth radiation zone 1122 may be.

[0114] The sizes of the first radiation path and the second radiation path may be obtained by dividing one quarter of the antenna wavelength by the dielectric constant of the first bracket 111 .

[0115] Through the technical solution of the embodiment of the present application, the current generated by the first feeding unit 113 flows in the first radiation path and the second radiation path, and the first radiation path and the second radiation path flow along the first bracket 111. The medium with a high dielectric constant can reduce the physical size of the antenna because the electromagnetic wave propagation speed in the medium is slower and the wavelength is shorter.

[0116] According to some embodiments of the present application, optionally, a size range of the first radiation path and the second radiation path is 4 cm to 15 cm.

[0117] For example, the size of the first radiation path and the second radiation path may be 4 cm, 6 cm, 8 cm, 10 cm, 12 cm, 14 cm.

[0118] According to some embodiments of the present application, optionally, reference may be made to Figure 5 and Figure 6 The antenna device 11 also includes a support member 115, which is arranged between the first radiation zone 1125 of the first antenna radiation portion 112 and the substrate 114, and the support member 115 is attached to a portion of the first radiation zone 1125. The first feeding portion 113 is connected to another portion of the first radiation zone 1125 and is located on one side of the support member 115.

[0119] A support member 115 is provided between the first antenna radiating portion 112 and the substrate 114 to support the first antenna radiating portion 112 .

[0120] According to some embodiments of the present application, optionally, reference may be made to Figures 2 to 6 The antenna device 11 further includes a first ground feed portion 116 , which is connected between the first radiation area 1125 of the first antenna radiation portion 112 and the substrate 114 .

[0121] The first power feeding portion 113 and the first ground feeding portion 116 are arranged relatively to each other along the length direction of the first bracket 111 (the Y direction in the figure). By arranging the first power feeding portion 113 and the first ground feeding portion 116, the antenna device 11 is an inverted-F antenna (IFA). The IFA has a compact design and good performance. When used in the active pen 10, it can better perform antenna transmission.

[0122] Figure 7 A top view of another antenna device 11 provided in an embodiment of the present application is shown.

[0123] According to some embodiments of the present application, optionally, continue to refer to Figures 5 to 7 The antenna device 11 also includes a second antenna unit, which includes a second bracket 119, a second antenna radiation portion 117 and a second feeding portion 118. The second feeding portion 118 is connected to the second antenna radiation portion 117, and the second antenna radiation portion 117 is bent and covered on the surface of the second bracket 119.

[0124] In the active pen 10, there is only one antenna unit that can only locate the position of the active pen 10 relative to the host, and cannot identify the placement angle of the active pen 10 relative to the host. When the active pen 10 includes two antennas, the host can identify the placement angle of the active pen 10 by calculating the position difference of the two antennas at the end of the active pen. In addition, the bending design of the second antenna unit can ensure that the antenna of the active pen 10 meets the required communication performance. The design of the antenna device 11 can reduce the physical size of the antenna to adapt to the compact internal space of the active pen 10.

[0125] Among them, Figure 5 As shown, the second antenna radiating portion 117 is similar to the first antenna radiating portion 112, and may include five radiation zones, namely, a ninth radiation zone 1171, a tenth radiation zone 1172, a seventh radiation zone 1173, an eighth radiation zone 1174, and a sixth radiation zone 1175. The second antenna radiating portion 117 may also include two radiation zones, three radiation zones, or four radiation zones, which is not limited in the present application.

[0126] It should be understood that the design of the second antenna unit is the same as that of the first antenna unit, and this application will not repeat them here. It should be understood that the design of the radiation unit of the first antenna unit and the second antenna unit can also be different. For example, the first antenna unit includes two radiation areas, and the second antenna unit includes three radiation areas, that is, the design of the radiation unit in the first antenna unit and the second antenna unit can be arbitrarily combined according to any of the above embodiments, and this application does not make any limitation on this.

[0127] According to some embodiments of the present application, optionally, continue to refer to Figure 5 and Figure 6 The first antenna unit and the second antenna unit are mirror-imaged at the end of the active pen 10 , and a connecting line between the first antenna unit and the second antenna unit is perpendicular to the central axis of the active pen 10 .

[0128] The mirror image setting can enhance the radiation in a specific direction, thereby improving the directivity of the antenna device 11. In addition, the mirror image setting can improve the impedance matching of the antenna. Due to the introduction of the second antenna unit mirrored with the first antenna unit, the input impedance of the first antenna unit can be changed to be closer to the characteristic impedance of the transmission line, thereby reducing the reflection coefficient and improving the transmission efficiency.

[0129] According to some embodiments of the present application, optionally, continue to refer to Figures 5 to 7 The first antenna unit and the second antenna unit are disposed on the same support member 115, and the first feeding portion 113 of the first antenna unit and the second feeding portion 118 of the second antenna unit are respectively located on opposite sides of the support member 115. The support member 115 is used to support the first antenna unit and the second antenna unit.

[0130] According to some embodiments of the present application, optionally, reference may be made to Figures 2 to 6 , a side of the first bracket 111 facing the housing of the active pen 10 matches the shape of the housing.

[0131] The side of the first bracket 111 facing the shell of the active pen matches the shape of the shell, so that the limited space inside the active pen 10 can be better utilized. In addition, the side of the first bracket 111 facing the shell of the active pen 10 matches the shape of the shell, so as to improve the mechanical stability of the antenna device 11 and reduce the risk of damage caused by vibration or impact.

[0132] According to some embodiments of the present application, optionally, reference may be made to Figures 2 to 7 The first bracket 111 has a curved surface facing the housing of the active pen 10 .

[0133] By designing the side of the first bracket 111 facing the housing of the active pen 10 to be a curved surface, the first bracket 111 can better cooperate with the active pen 10 to better utilize the limited space inside the active pen 10 .

[0134] According to some embodiments of the present application, optionally, the first antenna radiating portion 112 includes an FPC or a metal circuit printed on the surface of the first bracket 111 .

[0135] It should be understood that the second antenna radiating portion 117 also includes an FPC or a metal circuit printed on the surface of the second bracket 119 .

[0136] The metal circuit printed on the surface of the first bracket 111 may be a metal material printed on the first bracket 111 or the second bracket 119 using a laser direct structuring (LDS) or laser patterned substrate (LPS) process.

[0137] According to some embodiments of the present application, the antenna device 11 may optionally include a UWB antenna. By bending the antenna radiation portion, the size of the antenna device may be made larger, and the bandwidth of the antenna device 11 obtained complies with that of a UWB antenna.

[0138] Figure 8 A performance analysis diagram of the antenna device 11 provided in an embodiment of the present application is shown.

[0139] Figure 8 The standing wave ratio diagram of the antenna device 11 provided in the embodiment of the present application shows that the antenna device operates at around 8 GHz. Due to the superposition of electromagnetic wave signals generated by the two radiation paths, the bandwidth of the antenna device 11 is larger and the performance of the antenna device 11 is better.

[0140] In another embodiment, referring to Figures 5 to 8 The present application provides an antenna device, including a first antenna unit and a second antenna unit, wherein the first antenna unit and the second antenna unit are mirror-imaged at the end of an active pen 10, and a connecting line between the first antenna unit and the second antenna unit is perpendicular to the central axis of the active pen 10.

[0141] In the active pen 10, there is only one antenna unit that can only locate the position of the active pen 10 relative to the host, and cannot identify the placement angle of the active pen 10 relative to the host. When the active pen 10 includes two antennas, the host can identify the placement angle of the active pen 10 by calculating the position difference of the two antennas at the end of the active pen. In addition, the radiation in a specific direction can be enhanced by the mirror setting, thereby improving the directivity of the antenna device 11. In addition, the mirror setting can improve the impedance matching of the antenna. Due to the introduction of the second antenna unit mirrored with the first antenna unit, the input impedance of the first antenna unit can be changed to be closer to the characteristic impedance of the transmission line, thereby reducing the reflection coefficient and improving the transmission efficiency.

[0142] According to some embodiments of the present application, optionally, continue to refer to Figure 5 and Figure 6 The first antenna unit and the second antenna unit are disposed on the same support member 115, and the first feeding portion 113 of the first antenna unit and the second feeding portion 118 of the second antenna unit are respectively located on opposite sides of the support member 115. The support member 115 is used to support the first antenna unit and the second antenna unit.

[0143] According to some embodiments of the present application, optionally, the antenna unit includes a bracket, an antenna radiating portion and a feeding portion, the feeding portion is connected to the antenna radiating portion, and the antenna radiating portion is bent and wrapped around the surface of the bracket.

[0144] The bracket includes a first bracket 111 and a second bracket 119 , the antenna radiating portion includes a first antenna radiating portion 112 and a second antenna radiating portion 117 , and the feeding portion includes a feeding portion 113 and a feeding portion 118 .

[0145] The bending design of the first antenna unit and the second antenna unit can ensure that the antenna of the active pen 10 meets the required communication performance. The design of the antenna device 11 can reduce the physical size of the antenna to adapt to the compact internal space of the active pen 10.

[0146] According to some embodiments of the present application, optionally, continue to refer to Figures 5 to 7 The first antenna unit also includes a first bracket 111 and a first antenna radiating portion 112, the first feeding portion 113 is connected to the first antenna radiating portion 112, and the first antenna radiating portion 112 is bent and covered on the surface of the first bracket 111; the second antenna unit also includes a second bracket 119 and a second antenna radiating portion 117, the second feeding portion 118 is connected to the second antenna radiating portion 117, and the second antenna radiating portion 117 is bent and covered on the surface of the second bracket 119.

[0147] According to some embodiments of the present application, optionally, continue to refer to Figures 5 to 7 The first bracket 111 is a polyhedron structure, and the first antenna radiating portion 112 is bent and covered on at least two surfaces of the first bracket 111; the second bracket 119 is a polyhedron structure, and the second antenna radiating portion 117 is bent and covered on at least two surfaces of the second bracket 119.

[0148] According to some embodiments of the present application, optionally, continue to refer to Figures 5 to 7 The first antenna radiating portion 112 is surrounded and covered by the four surfaces of the first bracket 111, and there is a gap between the two ends of the first antenna radiating portion 112 in the surrounding direction; the second antenna radiating portion 117 is surrounded and covered by the four surfaces of the second bracket 119, and there is a gap between the two ends of the second antenna radiating portion 117 in the surrounding direction.

[0149] According to some embodiments of the present application, optionally, continue to refer to Figures 5 to 7 The antenna device 11 also includes a substrate 114, which is arranged opposite to the first surface of the first bracket 111, the first radiation area 1125 of the first antenna radiating portion 112 is attached to the first surface of the first bracket 111, and the first feeding portion 113 is connected to the first radiation area 1125 of the first antenna radiating portion 112; the substrate 114 is arranged opposite to the fifth surface of the second bracket 119, the second radiation area 1123 of the second antenna radiating portion 117 is attached to the fifth surface of the second bracket 119, and the second feeding portion 118 is connected to the sixth radiation area 1175 of the second antenna radiating portion 117.

[0150] In some possible implementations, continue to refer to FIG. Figure 7 The second and third surfaces of the first bracket 111 are adjacent to the first surface, and the second radiation zone 1123 and the third radiation zone 1124 connected to the first radiation zone 1125 of the first antenna radiation portion 112 are respectively attached to the second and third surfaces of the first bracket 111; the sixth and seventh surfaces of the second bracket 119 are adjacent to the fifth surface, and the seventh radiation zone 1173 and the eighth radiation zone 1174 connected to the fifth radiation zone 1122 of the second antenna radiation portion 117 are respectively attached to the sixth and seventh surfaces of the second bracket 119.

[0151] According to some embodiments of the present application, optionally, continue to refer to Figures 5 to 7 The fourth surface of the first bracket 111 is opposite to the first surface, the fourth radiation zone 1121 connected to the second radiation zone 1123 of the first antenna radiation portion 112 and the fifth radiation zone 1122 connected to the third radiation zone 1124 are attached to the fourth surface of the first bracket 111, and the fourth radiation zone 1121 and the fifth radiation zone 1122 have a gap; the eighth surface of the second bracket 119 is opposite to the fifth surface, the ninth radiation zone 1171 connected to the seventh radiation zone 1173 of the second antenna radiation portion 117 and the tenth radiation zone 1172 connected to the eighth radiation zone 1174 are attached to the eighth surface of the second bracket 119, and the ninth radiation zone 1171 and the tenth radiation zone 1172 have a gap.

[0152] According to some embodiments of the present application, optionally, the distance between the fourth radiation zone 1121 and the fifth radiation zone 1122 ranges from 0.1 mm to 0.2 mm; the distance between the ninth radiation zone 1171 and the tenth radiation ranges from 0.1 mm to 0.2 mm.

[0153] According to some embodiments of the present application, optionally, continue to refer to Figures 5 to 7The first feeding part 113, the first radiation zone 1125, the second radiation zone 1123 and the fourth radiation zone 1121 form a first radiation path of the first antenna unit, the first feeding part 113, the first radiation zone 1125, the third radiation zone 1124 and the fifth radiation zone 1122 form a second radiation path of the first antenna unit, and the bandwidth of the first antenna unit is determined according to the operating frequencies of the first radiation path and the second radiation path; the second feeding part 118, the seventh radiation zone 1173, the seventh radiation zone 1173 and the ninth radiation zone 1171 form a third radiation path of the second antenna unit, the second feeding part 118, the sixth radiation zone 1175, the eighth radiation zone 1174 and the tenth radiation zone 1172 form a fourth radiation path of the second antenna unit, wherein the bandwidth of the second antenna unit is determined according to the operating frequencies of the third radiation path and the fourth radiation path.

[0154] According to some embodiments of the present application, optionally, continue to refer to Figures 5 to 7 The sizes of the first radiation path and the second radiation path are determined according to the dielectric constant of the first bracket 111 ; the sizes of the third radiation path and the fourth radiation path are determined according to the dielectric constant of the second bracket 119 .

[0155] According to some embodiments of the present application, optionally, continue to refer to Figures 5 to 7 The size range of the first radiation path and the second radiation path is 4 cm to 15 cm; the size range of the third radiation path and the fourth radiation path is 4 cm to 15 cm.

[0156] According to some embodiments of the present application, optionally, continue to refer to Figures 5 to 7 The antenna device 11 also includes a support member, and the antenna device 11 also includes a support member. The support member is arranged between the first radiation zone 1125 of the first antenna radiation portion 112 and the substrate 114, the support member is attached to a portion of the first radiation zone 1125, the first feeding portion 113 is connected to another portion of the first radiation zone 1125, and is located on one side of the support member; the support member is arranged between the sixth radiation zone 1175 of the second antenna radiation portion 117 and the substrate 114, the support member is attached to a portion of the sixth radiation zone 1175, the second feeding portion 118 is connected to another portion of the sixth radiation zone 1175, and is located on one side of the support member.

[0157] According to some embodiments of the present application, optionally, continue to refer to Figures 5 to 7 The first antenna unit also includes a first ground feed portion 116, which is connected between the first radiation zone 1125 of the first antenna radiation portion 112 and the substrate 114; the second antenna unit also includes a second ground feed portion 120, which is connected between the sixth radiation zone 1175 of the second antenna radiation portion 117 and the substrate 114.

[0158] According to some embodiments of the present application, optionally, continue to refer to Figures 5 to 7 The first bracket 111 faces a side of the housing of the active pen and matches the shape of the housing; the second bracket 119 faces a side of the housing of the active pen and matches the shape of the housing.

[0159] According to some embodiments of the present application, optionally, continue to refer to Figures 5 to 7 The first bracket 111 has a curved surface facing the housing of the active pen; the second bracket 119 has a curved surface facing the housing of the active pen.

[0160] According to some embodiments of the present application, optionally, continue to refer to Figures 5 to 7 The first antenna radiating portion 112 includes an FPC or a metal circuit printed on the surface of the first bracket 111 ; the second antenna radiating portion 117 includes an FPC or a metal circuit printed on the surface of the second bracket 119 .

[0161] According to some embodiments of the present application, optionally, continue to refer to Figures 5 to 7 , the antenna device 11 includes a UWB antenna.

[0162] It should be understood that the structures of the first antenna unit and the second antenna unit may be the same, and therefore, the first antenna unit is taken as an example for detailed description.

[0163] According to some embodiments of the present application, optionally, the first bracket 111 is a polyhedron structure, and the first antenna radiating portion 112 is bent and covered on at least two surfaces of the first bracket 111 .

[0164] When the first bracket 111 is a polyhedral structure, the first antenna radiating portion 112 can be bent and wrapped around two surfaces of the first bracket 111, or bent and wrapped around three surfaces of the first bracket 111. Compared with a flat and unbent structure, the volume of the antenna device 11 can be saved, so that the active pen 10 is more adaptable.

[0165] When the first bracket 111 is a polyhedron, the first antenna radiating portion 112 is bent to cover at least two surfaces of the first bracket 111 . The bending design can reduce the volume of the antenna while ensuring the performance of the antenna device 11 .

[0166] According to some embodiments of the present application, optionally, continue to refer to Figures 2 to 4 The first antenna radiator 112 surrounds and covers the four surfaces of the first bracket 111, and there is a gap between the two ends of the first antenna radiator 112 in the surrounding direction.

[0167] The first antenna radiating portion 112 is wrapped around the four surfaces of the first bracket 111. Compared with the method in which the antenna radiating portion is flat and not bent, this method in the present application can better reduce the volume of the antenna. In addition, there is a gap between the two ends of the first antenna radiating portion 112 in the surrounding direction, so that the antenna device 11 can form two antenna radiation paths. The superposition of the two antenna radiation paths can obtain a larger antenna bandwidth, and maintaining a gap at both ends can reduce the mutual interference of the two antenna radiation paths.

[0168] According to some embodiments of the present application, optionally, reference may be made to Figures 2 to 6 The antenna device 11 also includes a substrate 114, which is arranged opposite to the first surface of the first bracket 111 (not shown in the figure), the first radiation area 1125 of the first antenna radiation portion 112 is attached to the first surface of the first bracket 111, and the first feeding portion 113 is connected to the first radiation area 1125 of the first antenna radiation portion 112.

[0169] The first surface of the first bracket 111 is a surface close to the first feeding unit 113 and along the direction of the first bracket 111 (Z direction in the figure).

[0170] The first feeding portion 113 is connected to the first radiation area 1125 of the first antenna radiating portion 112, so that the antenna device 11 forms two antenna radiation paths starting from the first feeding portion 113. The first feeding portion 113 converts the radio frequency signal into current, and these currents flow on the two antenna radiation paths to generate a changing electromagnetic field, and finally form an electromagnetic wave that propagates outward.

[0171] According to some embodiments of the present application, optionally, reference may be made to Figures 2 to 6 The second surface and the third surface of the first bracket 111 are adjacent to the first surface, and the second radiation zone 1123 and the third radiation zone 1124 connected to the first radiation zone 1125 of the first antenna radiation portion 112 are respectively attached to the second surface (not shown in the figure) and the third surface (not shown in the figure) of the first bracket 111.

[0172] like Figure 2 As shown, the second radiation area 1123 and the third radiation area 1124 are two surfaces along the width direction (X direction in the figure) of the first bracket 111.

[0173] like Figure 3 As shown, the third radiation area 1124 is attached to the third surface of the first bracket 111 .

[0174] Through the embodiment of the present application, the second radiation zone 1123 and the third radiation zone 1124 are respectively attached to the second surface and the third surface of the first bracket 111, that is, the second radiation zone 1123 and the third radiation zone 1124 of the first antenna radiation portion 112 are arranged relative to each other, so that the first antenna radiation portion 112 is at least covered by three surfaces of the first bracket 111, and the first radiation zone 1125, the second radiation zone 1123 and the third radiation zone 1124 are connected to form two antenna radiation paths, wherein one of the two radiation paths is the first feeding portion 113, the first radiation zone 1125 and the third radiation zone 1124, and the other radiation path is the first feeding portion 113, the first radiation zone 1125 and the second radiation zone 1123.

[0175] According to some embodiments of the present application, optionally, reference may be made to Figures 2 to 6 The fourth surface of the first bracket 111 is opposite to the first surface, the fourth radiation zone 1121 connected to the second radiation zone 1123 of the first antenna radiation part and the fifth radiation zone 1122 connected to the third radiation zone 1124 are attached to the fourth surface of the first bracket 111, and there is a gap between the fourth radiation zone 1121 and the fifth radiation zone 1122.

[0176] Through the embodiment of the present application, the first antenna radiation portion 112 is attached to the fourth surface of the first bracket 111 to form the fourth radiation area 1121 and the fifth radiation area 1122, so that the antenna device can form two antenna radiation paths. The superposition of the two antenna radiation paths can obtain a larger antenna bandwidth, and the gaps at both ends can reduce the mutual interference of the two antenna radiation paths. Among them, one of the two radiation paths is the first feeding portion 113, the first radiation area 1125, the third radiation area 1124 and the fifth radiation area 1122, and the other radiation path is the first feeding portion 113, the first radiation area 1125, the second radiation area 1123 and the fourth radiation area 1121.

[0177] Through the embodiments of the present application, a certain gap is set between the fourth radiation zone 1121 and the fifth radiation zone 1122, so as to reduce the mutual interference between the electromagnetic waves formed by the two antenna radiation paths.

[0178] According to some embodiments of the present application, optionally, the first feeding portion 113, the first radiation zone 1125, the second radiation zone 1123 and the fourth radiation zone 1121 form a first radiation path of the first antenna unit, and the first radiation zone 1125, the third radiation zone 1124 and the fifth radiation zone 1122 form a second radiation path of the first antenna unit, wherein the bandwidth of the first antenna unit is determined according to the operating frequencies of the first radiation path and the second radiation path.

[0179] Among them, the first feeding part 113 forms two antenna radiation paths with the radiation area of ​​the first antenna radiation part 112 respectively, and the electromagnetic waves formed by the two antenna radiation paths are superimposed to form the bandwidth of the antenna device. The antenna device 11 can increase the bandwidth of the antenna, and can improve the performance, flexibility and reliability of the wireless communication system in the active pen 10.

[0180] According to some embodiments of the present application, optionally, the sizes of the first radiation path and the second radiation path are determined according to the dielectric constant of the first bracket 111 .

[0181] The sizes of the first radiation path and the second radiation path may be obtained by dividing one quarter of the antenna wavelength by the dielectric constant of the first bracket 111 .

[0182] Through the technical solution of the embodiment of the present application, the current generated by the first feeding unit 113 flows in the first radiation path and the second radiation path, and the first radiation path and the second radiation path flow along the first bracket 111. The medium with a high dielectric constant can reduce the physical size of the antenna because the electromagnetic wave propagation speed in the medium is slower and the wavelength is shorter.

[0183] According to some embodiments of the present application, optionally, a size range of the first radiation path and the second radiation path is 4 cm to 15 cm.

[0184] For example, the size of the first radiation path and the second radiation path may be 4 cm, 6 cm, 8 cm, 10 cm, 12 cm, 14 cm.

[0185] According to some embodiments of the present application, optionally, reference may be made to Figure 5 and Figure 6 The antenna device 11 also includes a support member 115, which is arranged between the first radiation zone 1125 of the first antenna radiation portion 112 and the substrate 114, and the support member 115 is attached to a portion of the first radiation zone 1125. The first feeding portion 113 is connected to another portion of the first radiation zone 1125 and is located on one side of the support member 115.

[0186] A support member 115 is provided between the first antenna radiating portion 112 and the substrate 114 to support the first antenna radiating portion 112 .

[0187] According to some embodiments of the present application, optionally, reference may be made to Figures 2 to 6 The antenna device 11 further includes a first ground feed portion 116 , which is connected between the first radiation area 1125 of the first antenna radiation portion 112 and the substrate 114 .

[0188] The first feeding part 113 and the first ground feeding part 116 are arranged relatively along the length direction of the first bracket 111 (Y direction in the figure). By setting the first feeding part 113 and the first ground feeding part 116, the antenna device 11 is an IFA. The IFA has a compact design and good performance. When used in the active pen 10, it can better perform antenna transmission.

[0189] According to some embodiments of the present application, the present application further provides an active pen, including a communication device and an antenna device as described in any of the above schemes, and the communication device sends and receives information through the antenna device.

[0190] from Figure 7 It can be seen that the antenna device operates at about 8 GHz. Due to the two radiation paths, the bandwidth of the antenna device 11 is larger and the performance of the antenna device 11 is better.

[0191] It should be understood that the design of the radiating units of the first antenna unit and the second antenna unit may also be different. For example, the first antenna unit includes two radiation areas, and the second antenna unit includes three radiation areas. That is, the design of the radiating units in the first antenna unit and the second antenna unit can be arbitrarily combined according to any of the above-mentioned embodiments, and the present application does not impose any limitation on this.

[0192] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0193] It should be understood that the specific examples in this article are only intended to help those skilled in the art better understand the embodiments of the present application, rather than to limit the scope of the embodiments of the present application.

[0194] It should also be understood that in the various embodiments of the present application, the size of the serial number of each process does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0195] It should also be understood that the various implementation methods described in this specification can be implemented individually or in combination, and the embodiments of the present application are not limited to this.

[0196] Unless otherwise stated, all technical and scientific terms used in the embodiments of the present application are the same as the meanings generally understood by those skilled in the art of the technical field of the present application. The terms used in the present application are only for the purpose of describing specific embodiments and are not intended to limit the scope of the present application. The term "and / or" used in the present application includes any and all combinations of one or more related listed items. The singular forms of "a kind of", "above" and "the" used in the embodiments of the present application and the appended claims are also intended to include majority forms, unless the context clearly indicates other meanings. In addition, the terms "first", "second" etc. are only used for description purposes and cannot be understood as indicating or suggesting relative importance.

[0197] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0198] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0199] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0200] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0201] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An antenna device for an active pen, characterized in that: include: A first antenna unit, the first antenna unit comprising a first bracket, a first antenna radiation portion and a first feeding portion; The first feeding portion is connected to the first antenna radiating portion, and the first antenna radiating portion is bent and covered on the surface of the first bracket.

2. The antenna device according to claim 1, characterized in that The first bracket is a polyhedron structure, and the first antenna radiation portion is bent and covered on at least two surfaces of the first bracket.

3. The antenna device according to claim 2, characterized in that The first antenna radiating portion surrounds and covers four surfaces of the first bracket, and a gap is formed between two ends of the first antenna radiating portion in a surrounding direction.

4. The antenna device according to claim 1, characterized in that: The antenna device further comprises a substrate, The substrate is arranged opposite to the first surface of the first bracket, the first radiation area of ​​the first antenna radiation part is attached to the first surface of the first bracket, and the first feeding part is connected to the first radiation area of ​​the first antenna radiation part.

5. The antenna device according to claim 4, characterized in that: The second surface and the third surface of the first bracket are adjacent to the first surface, and the second radiation area and the third radiation area connected to the first radiation area of ​​the first antenna radiation part are attached to the second surface and the third surface of the first bracket respectively.

6. The antenna device according to claim 4, characterized in that: The fourth surface of the first bracket is opposite to the first surface, and the fourth radiation area connected to the second radiation area of ​​the first antenna radiation part and the fifth radiation area connected to the third radiation area are attached to the fourth surface of the first bracket, and there is a gap between the fourth radiation area and the fifth radiation area.

7. The antenna device according to claim 6, characterized in that: The first feed portion, the first radiation area, the second radiation area, and the fourth radiation area form a first radiation path of the first antenna unit, and the first feed portion, the first radiation area, the third radiation area, and the fifth radiation area form a second radiation path of the first antenna unit. The bandwidth of the first antenna unit is determined according to the operating frequencies of the first radiation path and the second radiation path.

8. The antenna device according to claim 7, characterized in that: The sizes of the first radiation path and the second radiation path are determined according to the dielectric constant of the first bracket.

9. The antenna device according to claim 7, characterized in that: The first radiation path and the second radiation path have a size ranging from 4 cm to 15 cm.

10. The antenna device according to claim 4, characterized in that: The antenna device also includes a support member, which is arranged between the first radiation area of ​​the first antenna radiation part and the substrate, the support member is attached to a part of the first radiation area, and the first feeding part is connected to another part of the first radiation area and is located on one side of the support member.

11. The antenna device according to claim 4, characterized in that: The antenna device further includes a first ground feed portion connected between the first radiation area of ​​the first antenna radiation portion and the substrate.

12. The antenna device according to any one of claims 1 to 11, characterized in that: The antenna device further includes a second antenna unit, wherein the second antenna unit includes a second bracket, a second antenna radiation portion, and a second feeding portion. The second feeding portion is connected to the second antenna radiating portion, and the second antenna radiating portion is bent and covered on a surface of the second bracket.

13. The antenna device according to claim 12, characterized in that: The first antenna unit and the second antenna unit are arranged at the end of the active pen in a mirror image, and a connection line between the first antenna unit and the second antenna unit is perpendicular to the central axis of the active pen.

14. The antenna device according to claim 12, characterized in that: The first antenna unit and the second antenna unit are arranged on the same supporting member, and the first feeding part of the first antenna unit and the second feeding part of the second antenna unit are respectively located on two opposite sides of the supporting member.

15. The antenna device according to any one of claims 1 to 11, characterized in that: A side of the first bracket facing the housing of the active pen matches the shape of the housing.

16. The antenna device according to any one of claims 1 to 11, characterized in that: A surface of the first bracket facing the housing of the active pen is a curved surface.

17. The antenna device according to any one of claims 1 to 11, characterized in that: The first antenna radiating portion includes a flexible circuit board (FPC) or a metal circuit printed on a surface of the first bracket.

18. The antenna device according to any one of claims 1 to 11, characterized in that: The antenna device includes an ultra-wideband (UWB) antenna.

19. An antenna device for an active pen, characterized in that: include: A first antenna unit and a second antenna unit, wherein the first antenna unit and the second antenna unit are mirror-imaged at the end of the active pen, and a line between the first antenna unit and the second antenna unit is perpendicular to the central axis of the active pen.

20. The antenna device according to claim 19, characterized in that The first antenna unit includes a first feeder, the second antenna unit includes a second feeder, The first antenna unit and the second antenna unit are arranged on the same supporting member, and the first feeding portion and the second feeding portion are respectively located on two opposite sides of the supporting member.

21. The antenna device according to claim 20, characterized in that The first antenna unit further includes a first bracket and a first antenna radiating portion, the first feeding portion is connected to the first antenna radiating portion, and the first antenna radiating portion is bent and covered on the surface of the first bracket; The second antenna unit further includes a second bracket and a second antenna radiating portion, the second feeding portion is connected to the second antenna radiating portion, and the second antenna radiating portion is bent and covered on the surface of the second bracket.

22. The antenna device according to claim 21, characterized in that The first bracket is a polyhedral structure, and the first antenna radiating portion is bent and covered on at least two surfaces of the first bracket; The second bracket is a polyhedron structure, and the second antenna radiation portion is bent and covered on at least two surfaces of the second bracket.

23. The antenna device according to claim 21, characterized in that The first antenna radiating portion surrounds and covers four surfaces of the first bracket, and there is a gap between two ends of the first antenna radiating portion in the surrounding direction; The second antenna radiating portion surrounds and covers four surfaces of the second bracket, and a gap is formed between two ends of the second antenna radiating portion in a surrounding direction.

24. The antenna device according to claim 21, characterized in that The antenna device further includes a substrate, the substrate is arranged opposite to the first surface of the first bracket, the first radiation area of ​​the first antenna radiation part is attached to the first surface of the first bracket, and the first feeding part is connected to the first radiation area of ​​the first antenna radiation part; The substrate is arranged opposite to the fifth surface of the second bracket, the second radiation area of ​​the second antenna radiation part is attached to the fifth surface of the second bracket, and the second feeding part is connected to the sixth radiation area of ​​the second antenna radiation part.

25. The antenna device according to claim 24, characterized in that The second surface and the third surface of the first bracket are adjacent to the first surface, and the second radiation area and the third radiation area connected to the first radiation area of ​​the first antenna radiation part are attached to the second surface and the third surface of the first bracket respectively; The sixth surface and the seventh surface of the second bracket are adjacent to the fifth surface, and the seventh radiation area and the eighth radiation area connected to the fifth radiation area of ​​the second antenna radiation part are attached to the sixth surface and the seventh surface of the second bracket respectively.

26. The antenna device according to claim 24, characterized in that The fourth surface of the first bracket is opposite to the first surface, the fourth radiation area connected to the second radiation area of ​​the first antenna radiation portion and the fifth radiation area connected to the third radiation area are attached to the fourth surface of the first bracket, and there is a gap between the fourth radiation area and the fifth radiation area; The eighth surface of the second bracket is opposite to the fifth surface, and the ninth radiation area connected to the seventh radiation area of ​​the second antenna radiation part and the tenth radiation area connected to the eighth radiation area are attached to the eighth surface of the second bracket, and there is a gap between the ninth radiation area and the tenth radiation area.

27. The antenna device according to claim 26, characterized in that The first feed portion, the first radiation area, the second radiation area, and the fourth radiation area form a first radiation path of the first antenna unit, the first feed portion, the first radiation area, the third radiation area, and the fifth radiation area form a second radiation path of the first antenna unit, and the bandwidth of the first antenna unit is determined according to the operating frequencies of the first radiation path and the second radiation path; The second feeding portion, the seventh radiation zone, the seventh radiation zone and the ninth radiation zone portion form a third radiation path of the second antenna unit, the second feeding portion, the sixth radiation zone, the eighth radiation zone and the tenth radiation zone form a fourth radiation path of the second antenna unit, and the bandwidth of the second antenna unit is determined according to the operating frequencies of the third radiation path and the fourth radiation path.

28. The antenna device according to claim 27, characterized in that The sizes of the first radiation path and the second radiation path are determined according to the dielectric constant of the first bracket; The sizes of the third radiation path and the fourth radiation path are determined according to the dielectric constant of the second bracket.

29. The antenna device according to claim 27, characterized in that The size of the first radiation path and the second radiation path ranges from 4 cm to 15 cm; The third radiation path and the fourth radiation path have a size ranging from 4 cm to 15 cm.

30. The antenna device according to any one of claims 24 to 29, characterized in that: The antenna device further includes a support member, the support member is disposed between the first radiation area of ​​the first antenna radiation portion and the substrate, the support member is attached to a portion of the first radiation area, and the first feeding portion is connected to another portion of the first radiation area and is located on one side of the support member; The support member is arranged between the sixth radiation area of ​​the second antenna radiation part and the substrate, the support member is attached to a part of the sixth radiation area, and the second feeding part is connected to another part of the sixth radiation area and is located on one side of the support member.

31. The antenna device according to any one of claims 24 to 29, characterized in that The first antenna unit further includes a first ground feed portion, wherein the first ground feed portion is connected between the first radiation area of ​​the first antenna radiation portion and the substrate; The second antenna unit further includes a second ground feed portion connected between the sixth radiation region of the second antenna radiation portion and the substrate.

32. The antenna device according to any one of claims 24 to 29, characterized in that: A side of the first bracket facing the housing of the active pen matches the shape of the housing; A side of the second bracket facing the housing of the active pen matches the shape of the housing.

33. The antenna device according to any one of claims 24 to 29, characterized in that A side of the first bracket facing the housing of the active pen is a curved surface; A surface of the second bracket facing the housing of the active pen is a curved surface.

34. The antenna device according to any one of claims 24 to 29, characterized in that The first antenna radiating portion includes a flexible circuit board FPC or a metal circuit printed on the surface of the first bracket; The second antenna radiation portion includes the FPC or a metal circuit printed on a surface of the second bracket.

35. The antenna device according to any one of claims 24 to 29, characterized in that The antenna device comprises a UWB antenna.

36. An active pen, characterized in that: The invention comprises a communication device and an antenna device as claimed in any one of claims 1 to 18 or an antenna device as claimed in any one of claims 19 to 35, wherein the communication device sends and receives information via the antenna device.

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