Electronic equipment

Abstract

The invention discloses an electronic device, and the electronic device comprises a hollow housing which comprises a backboard; the first antenna radiator is arranged in the shell; the second antenna radiator is rotationally connected to the back plate, and the first end of the second antenna radiator is located outside the shell; the second antenna radiator comprises a first posture and a second posture, when the second antenna radiator is in the first posture, the second antenna radiator is folded and attached to the outer side surface of the back plate, the first end of the second antenna radiator moves in the direction away from the back plate and is unfolded to enter the second posture, and when the second antenna radiator is in the second posture, the second end of the second antenna radiator is folded and attached to the outer side surface of the back plate. The first antenna radiator is electrically connected with the second antenna radiator. The second antenna radiator does not occupy the internal space of the electronic equipment, the space of the electronic equipment is not increased in the first posture, and the radiation performance of the electronic equipment can be improved in the second posture, so that the radiation performance of the electronic equipment can be improved under the condition that the space of the electronic equipment is not increased.

Description

Technical Field

[0001] This application relates to the technical field of electronic devices, and particularly to an electronic device. Background Art

[0002] With the large-scale popularization of smart phones, people's demand for mobile phone positioning and navigation is increasing. Therefore, the performance of the GNSS (Global Navigation Satellite System) of mobile phones, especially the GPS (Global Positioning System), is becoming increasingly important. However, in the trend of smaller antenna design and radiation space, and greater challenges in shape design, the antenna performance often deteriorates as a result. At present, most of the GNSS / GPS antenna solutions in mobile phones are single built-in antennas, and single built-in antennas cannot effectively receive the complete signal strength. If multiple built-in antennas are used, it will lead to a bloated design of the mobile phone, which does not conform to the current design of lightweight and compact smart phones.

[0003] That is, in the prior art, the radiation performance of electronic devices is limited by the space of the electronic devices. Summary of the Invention

[0004] An embodiment of this application provides an electronic device, which can improve the radiation performance of the electronic device without increasing the space of the electronic device.

[0005] In a first aspect, the electronic device provided by this application includes:

[0006] A housing, the housing is hollow, and the housing includes a back panel;

[0007] A first antenna radiator, the first antenna radiator is disposed inside the housing;

[0008] A second antenna radiator, the second antenna radiator is rotatably connected to the back panel, and a first end of the second antenna radiator is located outside the housing;

[0009] The second antenna radiator includes a first posture and a second posture. When the second antenna radiator is in the first posture, the second antenna radiator is folded and attached to the outer surface of the back panel, and the first end of the second antenna radiator moves away from the back panel to unfold into the second posture. When the second antenna radiator is in the second posture, the first antenna radiator is electrically connected to the second antenna radiator.

[0010] In this application, compared with the related art, the electronic device includes: a housing, which is hollow and includes a back plate; a first antenna radiator disposed inside the housing; a second antenna radiator rotatably connected to the back plate, with the first end of the second antenna radiator located outside the housing; the second antenna radiator includes a first posture and a second posture. When the second antenna radiator is in the first posture, the second antenna radiator folds and adheres to the outer surface of the back plate, and the first end of the second antenna radiator moves away from the back plate to unfold into the second posture. When the second antenna radiator is in the second posture, the first antenna radiator is electrically connected to the second antenna radiator. In this application, the first antenna radiator and the second antenna radiator are respectively disposed inside and outside the housing. The second antenna radiator does not occupy the internal space of the electronic device. When the second antenna radiator is in the first posture, the second antenna radiator folds and adheres to the outer surface of the back plate, without increasing the space of the electronic device. At the same time, when the second antenna radiator is in the second posture, the first antenna radiator is electrically connected to the second antenna radiator, and the coupling between the first antenna radiator and the second antenna radiator can improve the radiation performance of the electronic device. Therefore, the radiation performance of the electronic device can be improved without increasing the space of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of this application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0012] Figure 1 It is a schematic structural diagram of the second antenna radiator in the second posture in an embodiment of the electronic device provided by an embodiment of this application;

[0013] Figure 2 It is a schematic structural diagram of the second antenna radiator in the first posture in an embodiment of the electronic device provided by an embodiment of this application;

[0014] Figure 3 It is a schematic internal structural diagram of the second antenna radiator in the second posture in an embodiment of the electronic device provided by an embodiment of this application;

[0015] Figure 4 It is a schematic structural diagram of the second antenna radiator in an embodiment of the electronic device provided by an embodiment of this application;

[0016] Figure 5 It is a schematic structural diagram of the electrical connection between the second antenna radiator and the first antenna radiator in an embodiment of the electronic device provided by an embodiment of this application;

[0017] Figure 6 It is another structural schematic diagram of the electrical connection between the second antenna radiator and the first antenna radiator in an embodiment of the electronic device provided by the embodiments of the present application;

[0018] Figure 7 It is a current schematic diagram of the second antenna radiator and the first antenna radiator when the current phase of the feed source is 0 degrees in an embodiment of the electronic device provided by the embodiments of the present application;

[0019] Figure 8 It is a current schematic diagram of the second antenna radiator and the first antenna radiator when the current phase of the feed source is 90 degrees in an embodiment of the electronic device provided by the embodiments of the present application;

[0020] Figure 9 It is a schematic diagram of the radiation range in which the second antenna radiator and the first antenna radiator electrically form a circular polarization characteristic in an embodiment of the electronic device provided by the embodiments of the present application;

[0021] Figure 10 It is an axial ratio schematic diagram in which the second antenna radiator and the first antenna radiator electrically form a circular polarization characteristic in an embodiment of the electronic device provided by the embodiments of the present application. Detailed implementation manners

[0022] It should be noted that the principle of the present application is illustrated by being implemented in a suitable operating environment. The following description is based on the specific embodiments of the present application illustrated, and it should not be regarded as limiting other specific embodiments of the present application not detailed herein.

[0023] In the following description of the present application, reference is made to "some embodiments", which describe a subset of all possible embodiments. However, it can be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0024] In the following description of the present application, the terms "first / second / third" are only used to distinguish similar objects and do not represent a specific order for the objects. It can be understood that "first / second / third" can be interchanged with a specific order or sequence when allowed, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs. The terms used herein are only for the purpose of describing the embodiments of the present application and are not intended to limit the present application.

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are only a part rather than all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0027] The electronic device of the present application can be a computing device such as a laptop computer, a computer monitor including an embedded computer, a tablet computer, a cellular phone, a media player, or other handheld or portable electronic devices, a television, a computer display without an embedded computer, a gaming device, a navigation device, an embedded system (such as a system in which an electronic device with a display is installed in a kiosk or a vehicle), a device that implements the functions of two or more of these devices, or other electronic devices.

[0028] Please refer to Figures 1-6 , the electronic device 10 provided by the present application includes a housing 13, a first antenna radiator 11, and a second antenna radiator 12. Among them, the electronic device 10 is a smart phone.

[0029] Among them, the housing 13 is hollow. The housing 13 includes a back plate 131. The first antenna radiator 11 is disposed inside the housing 13. The second antenna radiator 12 is rotatably connected to the back plate 131. The first end 123 of the second antenna radiator 12 is located outside the housing 13. The second antenna radiator 12 includes a first posture and a second posture. When the second antenna radiator 12 is in the first posture, the second antenna radiator 12 is folded and attached to the outer surface of the back plate 131. The first end 123 of the second antenna radiator 12 moves away from the back plate 131 to expand into the second posture. When the second antenna radiator 12 is in the second posture, the first antenna radiator 11 is electrically connected to the second antenna radiator 12.

[0030] In the present application, the first antenna radiator and the second antenna radiator are respectively disposed inside and outside the housing. The second antenna radiator does not occupy the internal space of the electronic device. When the second antenna radiator is in the first posture, the second antenna radiator is folded and attached to the outer surface of the back plate, and does not increase the space of the electronic device. At the same time, when the second antenna radiator is in the second posture, the first antenna radiator is electrically connected to the second antenna radiator, and the coupling of the first antenna radiator and the second antenna radiator can improve the radiation performance of the electronic device. Therefore, the radiation performance of the electronic device can be improved without increasing the space of the electronic device.

[0031] In the embodiments of the present application, the housing 13 is hollow, and the housing 13 includes a back plate 131. The housing 13 can be a cube or a cube with chamfered corners. The housing 13 being a cube with chamfered corners can avoid harm to people caused by the sharp corners at the four corners and improve the comfort of a person holding the electronic device 10.

[0032] In the embodiments of the present application, both the first antenna radiator 11 and the second antenna radiator 12 are linear polarization antenna radiators. When the second antenna radiator 12 is in the second posture, the polarization directions of the first antenna radiator 11 and the second antenna radiator 12 are perpendicular. This can improve the radiation performance after the coupling of the two radiators.

[0033] The polarization of an electromagnetic wave refers to the change of the direction of the electric field vector with time during the propagation of the electromagnetic wave. The propagation of an electromagnetic wave can be understood as propagation in a four-dimensional space, space + time. Polarization can be understood as fixing a certain point in space and observing the way the tip trajectory of the electric field vector at this point changes with time, where the propagation direction of the electromagnetic wave needs to be considered. In general applications, electromagnetic waves that are relatively far from the source are usually regarded as plane waves. According to the decomposability of vectors, the electric field vector can be decomposed into two components perpendicular to each other within the equiphase plane, and then the polarization method can be judged by using the phases and amplitudes of these two components. A linearly polarized electromagnetic wave describes an electromagnetic wave in which the orientation of the electric field vector in space remains fixed. Sometimes, taking the ground as a parameter, the electric field vector direction parallel to the ground is called horizontal polarization, and the one perpendicular to the ground is called vertical polarization.

[0034] In the embodiments of the present application, the first antenna radiator 11 is a horizontal polarization antenna radiator, and the second antenna radiator 12 is a vertical polarization antenna radiator. When the second antenna radiator 12 is in the first posture, the second antenna radiator 12 is folded, which is convenient for the user to carry. There is no electrical connection between the first antenna radiator 11 and the second antenna radiator 12, and the second antenna radiator 12 does not work, while the first antenna radiator 11 works normally. When the second antenna radiator 12 is in the second posture, the second antenna radiator 12 is unfolded and can be used as a bracket to support the electronic device 10. At the same time, there is an electrical connection between the first antenna radiator 11 and the second antenna radiator 12, so as to enhance the radiation performance of the electronic device 10.

[0035] In another embodiment, the first antenna radiator 11 can also be a vertical polarization antenna radiator, and the second antenna radiator 12 is a horizontal polarization antenna radiator. In other embodiments, the angle between the first antenna radiator 11 and the second antenna radiator 12 can also be an acute angle or an obtuse angle, which can be set according to specific situations.

[0036] Among them, both the first antenna radiator 11 and the second antenna radiator 12 are linear radiators, and both the first antenna radiator 11 and the second antenna radiator 12 can be metal rods or rods with a metal coating on the outer surface.

[0037] In the embodiment of the present application, a feeding point 111 is provided on the first antenna radiator 11. The feeding point 111 is used to connect to a feeding source 16, and the feeding source 16 inputs current to the first antenna radiator 11 through the feeding point 111. The electronic device 10 includes an antenna floor 14. The antenna floor 14 is located inside the housing 13. A supporting portion 112 is provided on the antenna floor 14. The first antenna radiator 11 is mounted on the supporting portion 112. The surface of the antenna floor 14 is parallel to the outer surface of the back plate 131. The feeding source 16 connects the feeding point 111 and the antenna floor 14. Specifically, the number of the supporting portions 112 is two.

[0038] In the embodiment of the present application, an opening 132 is formed on the outer surface of the back plate 131. A rotating device 113 is provided on the outer surface of the back plate 131. The second antenna radiator 12 is connected to the rotating device 113. The second antenna radiator 12 rotates around the rotating device 113. In the second posture of the second antenna radiator 12, the second end 124 of the second antenna radiator 12 extends into the housing 13 through the opening 132 and is electrically connected to the first antenna radiator 11.

[0039] Among them, the rotating device 113 may include a rotating shaft and a bushing sleeved on the rotating shaft. Both ends of the rotating shaft are fixed on the outer surface of the back plate 131. One side of the second antenna radiator 12 is fixed on the outer surface of the bushing. The second antenna radiator 12 and the bushing rotate synchronously around the rotating shaft. Of course, the rotating device 113 may also be other structures, which can be set according to the situation. Among them, the opening 132 is a rectangular opening 132. In other embodiments, the opening 132 may also be an opening 132 with a circular, elliptical or other shapes, which can be set according to the specific situation.

[0040] Specifically, the rotating device 113 is arranged on the inner wall edge of the opening 132. When the second antenna radiator 12 and the bushing rotate synchronously around the rotating shaft to the first posture, the second antenna radiator 12 can closely fit the back plate 131.

[0041] Further, the rotating device 113 may further include a driving motor. The driving motor is used to drive the bushing to rotate, so as to electrically control the rotating device 113. Further, the electronic device 10 further includes a control circuit. The control circuit is connected to the driving motor. The control circuit is used to control the driving motor to drive the second antenna radiator 12 and the bushing to rotate synchronously and record the rotation angle of the second antenna radiator 12.

[0042] In a specific embodiment, when the second antenna radiator 12 is in the second posture, the second antenna radiator 12 contacts the first antenna radiator 11 to form an electrical connection.

[0043] Specifically, when the second antenna radiator 12 is in the second posture, the first antenna radiator 11 is perpendicular to the second antenna radiator 12, and the second end 124 of the second antenna radiator 12 contacts the first antenna radiator 11 to form an electrical connection. When the first antenna radiator 11 is not in the second posture, the first antenna radiator 11 is not perpendicular to the second antenna radiator 12, and the second end 124 of the second antenna radiator 12 does not contact the first antenna radiator 11, and no electrical connection is formed.

[0044] In another specific embodiment, when the second antenna radiator 12 is in the second posture, the second antenna radiator 12 is spaced apart from the first antenna radiator 11 by a preset gap and forms a magnetic field coupling. The preset gap can be set according to specific requirements. When the second antenna radiator 12 is spaced apart from the first antenna radiator 11 by the preset gap, the second antenna radiator 12 and the first antenna radiator 11 establish an electrical connection through magnetic field coupling. The coupling of the magnetic field means that a changing magnetic field can induce a current in a conductor through Faraday's law, without the need for direct contact between the noise source and the disturbed circuit to establish a coupling relationship.

[0045] Specifically, when the second antenna radiator 12 is in the second posture, the first antenna radiator 11 is perpendicular to the second antenna radiator 12, and the second end 124 of the second antenna radiator 12 is spaced apart from the first antenna radiator 11 by a preset gap. At this time, the second end 124 of the second antenna radiator 12 and the first antenna radiator 11 form an electrical connection through magnetic field coupling. When the second antenna radiator 12 is not in the second posture, the second end 124 of the second antenna radiator 12 is at a relatively far distance from the first antenna radiator 11, and no electrical connection is formed.

[0046] In yet another specific embodiment, the electronic device 10 includes a connection circuit. The second end 124 of the second antenna radiator 12 is connected to the first antenna radiator 11 through the connection circuit. An electronic switch is provided in the connection circuit, and the electronic switch is used to control the on / off of the connection circuit. The connection circuit is connected to a control circuit, and the control circuit controls the electronic switch according to the rotation angle of the second antenna radiator 12. For example, when the first antenna radiator 11 is in the first posture, the rotation angle of the second antenna radiator 12 is 0 degrees, and the control circuit controls the electronic switch to close, and the second antenna radiator 12 does not work. When the second antenna radiator 12 is in the second posture, the rotation angle of the second antenna radiator 12 is 90 degrees, and the control circuit controls the electronic switch to open, and the second antenna radiator 12 and the first antenna radiator 11 are coupled.

[0047] Further, the second antenna radiator 12 further includes a third posture. When the second antenna radiator 12 is in the third posture, the extending direction of the second antenna radiator 12 can form an acute angle or an obtuse angle with the outer surface of the back plate 131. When the second antenna radiator 12 is in the third posture, the rotation angle of the second antenna radiator 12 is an acute angle or an obtuse angle. The control circuit controls the electronic switch to be turned on, and the second antenna radiator 12 is coupled with the first antenna radiator 11.

[0048] Further, since the user may move the electronic device 10 during the use of the electronic device 10, in order to ensure better performance of the electronic device 10. When the control circuit detects that the electronic device 10 is in a call state, the control circuit is used to control the driving motor to drive the second antenna radiator 12 to reciprocate within a rotation angle of 45 degrees to 135 degrees, and keep the second antenna radiator 12 electrically connected to the second antenna radiator 12 to find the optimal signal angle.

[0049] As Figure 4 shown, in the embodiment of the present application, the cross-section of the second antenna radiator 12 is an arc-shaped cross-section. The second antenna radiator 12 includes an antenna arc surface 122 and an antenna plane 121. The antenna plane 121 is connected to the rotating device 113. When the second antenna radiator 12 is in the first posture, the antenna plane 121 of the second antenna radiator 12 adheres to the back plate 131, and the antenna arc surface 122 is away from the back plate 131, which can closely fit the second antenna radiator 12 and the back plate 131, and the antenna arc surface 122 can prevent the user of the device from being scratched. When the second antenna radiator 12 is in the second posture, the antenna plane 121 of the second antenna radiator 12 contacts the first antenna radiator 11.

[0050] In the embodiment of the present application, the electronic device 10 includes a feed source 16. The feed source 16 is used to input current to the first antenna radiator 11. When the second antenna radiator 12 is in the second posture, the second end 124 of the second antenna radiator 12 is electrically connected to the current strong point on the first antenna radiator 11, where the current strong point is the position where the current is the largest when the first antenna radiator 11 is connected to the feed source 16. Among them, the feed source 16 is used to provide alternating current. The second end 124 of the second antenna radiator 12 is electrically connected to the current strong point on the first antenna radiator 11, which can improve the radiation performance after the second antenna radiator 12 is coupled with the first antenna radiator 11.

[0051] In the embodiment of the present application, the distance from the midpoint of the second antenna radiator 12 to the current strong point on the first antenna radiator 11 is an odd multiple of a quarter wavelength. The quarter wavelength is one quarter of the wavelength of the electromagnetic wave. For example, the distance from the midpoint of the second antenna radiator 12 to the current strong point on the first antenna radiator 11 is a quarter wavelength, three quarters of a wavelength, five quarters of a wavelength, etc.

[0052] Description of Circular Polarization When the angle between the polarization plane of a radio wave and the normal plane of the earth changes periodically from 0 to 360 degrees, that is, the magnitude of the electric field remains unchanged and the direction changes with time, and the trajectory of the end of the electric field vector projected on the plane perpendicular to the propagation direction is a circle, it is called circular polarization. Circular polarization can be obtained when the amplitudes of the horizontal and vertical components of the electric field are equal and the phase difference is 90 degrees or 270 degrees.

[0053] When the distance from the midpoint of the second antenna radiator 12 to the current strong point on the first antenna radiator 11 is an odd multiple of a quarter wavelength, the current phases of the second antenna radiator 12 and the first antenna radiator 11 differ by 90 degrees. At this time, the second antenna radiator 12 and the first antenna radiator 11 can generate circular polarization characteristics. Since the polarization mode of GNSS satellites is circular polarization, using a linearly polarized antenna to receive circularly polarized signals will cause a certain polarization loss and cannot effectively receive the complete signal strength. The second antenna radiator 12 and the first antenna radiator 11 of the present application generate circular polarization characteristics. By generating circular polarization characteristics through two linearly polarized antennas, GNSS satellite signals can be effectively and completely received.

[0054] As Figure 5 shown, in a specific embodiment, the first antenna radiator 11 is a half-wavelength dipole antenna. When the second antenna radiator 12 is in the second posture, the second end 124 of the second antenna radiator 12 is electrically connected to the midpoint of the first antenna radiator 11. The current strong point of the half-wavelength dipole antenna is at the midpoint of the half-wavelength dipole antenna, and the second end 124 of the second antenna radiator 12 is electrically connected to the midpoint of the first antenna radiator 11.

[0055] The half-wavelength dipole actually refers to an antenna in which the length of a single-arm oscillator of the dipole is 1 / 4 wavelength and the full length is half wavelength. A dipole refers to a pair of charges or "magnetic charges" that are relatively close and have opposite signs, and perform simple harmonic motion back and forth along a straight line. The charges that perform back-and-forth simple harmonic vibration in a dipole antenna are the source of the antenna radiation field. The oscillator is the most basic antenna unit, and an oscillator with two equal-length arms is called a symmetric oscillator. The symmetric oscillator is the physical carrier that carries the dipole charges. Therefore, a half-wavelength dipole refers to a symmetric oscillator with a single-arm oscillator length of 1 / 4 wavelength. In the field of antennas, it refers to an antenna with a full length of half wavelength

[0056] As Figure 6 shown, in another specific embodiment, the first antenna radiator 11 is a quarter-wavelength inverted-F antenna. When the second antenna radiator 12 is in the second posture, the second end 124 of the second antenna radiator 12 is electrically connected to the ground connection point of the first antenna radiator 11. The ground connection point of the inverted-F antenna is the current strong point.

[0057] The inverted-F antenna, also known as the Inverted-F Antenn or IFA, is a monopole antenna with advantages such as small size, simple structure, easy matching, and low manufacturing cost. It is widely used in short-range wireless communication fields such as Bluetooth and WiFi. The design process of the inverted-F antenna can be summarized as follows: bending a monopole antenna by 90° to obtain an inverted-L antenna. To reduce the height of the antenna, a patch needs to be added to the inverted-L antenna to make it an inverted-F antenna. The inverted-F antenna is composed of a terminally open transmission line with length L and a terminally shorted transmission line with length S connected in parallel. Among them, the open circuit to the feed point 111 can be equivalent to the parallel connection of a resistor and a capacitor, and the short circuit end to the feed point 111 can be equivalent to the series connection of a resistor and an inductor.

[0058] Of course, in other embodiments, the first antenna radiator 11 can also be other types of antennas, and this application does not limit this.

[0059] In the embodiments of this application, the housing 13 includes a top edge 133. The first antenna radiator 11 is close to the top edge 133, and the extending direction of the first antenna radiator 11 is parallel to the extending direction of the top edge 133. When the second antenna radiator 12 is in the second posture, the extending direction of the second antenna radiator 12 is perpendicular to the outer surface of the back plate 131. When the second antenna radiator 12 is in the second posture, the extending direction of the second antenna radiator 12 is perpendicular to the outer surface of the back plate 131. At this time, the radiation ranges generated by the first antenna radiator 11 and the second antenna radiator 12 have the beam facing the top edge, which is beneficial for users to use the satellite communication function. Of course, in other embodiments, the first antenna radiator 11 may not be close to the top edge 133, and it can be set according to specific situations.

[0060] Furthermore, a groove matching the first antenna radiator 11 is provided on the back plate 131. When the second antenna radiator 12 is in the first posture, the antenna plane 121 of the second antenna radiator 12 adheres to the bottom surface of the groove on the back plate 131. The thickness of the second antenna radiator 12 is the same as the depth of the groove, and the second antenna radiator 12 is located in the groove, which can prevent the second antenna radiator 12 from protruding from the back plate 131 and causing discomfort to the user when holding.

[0061] Furthermore, the electronic device 10 may further include a plurality of second antenna radiators 12, and the plurality of second antenna radiators 12 are arranged in sequence in the extending direction of the first antenna radiator 11, and each second antenna radiator 12 is electrically connected to the first antenna radiator 11 in the second posture.

[0062] Furthermore, the electronic device 10 includes a plurality of feed sources 16, and one feed source 16 is configured for the first antenna radiator 11 and each second antenna radiator 12, so that the first antenna radiator 11 and each second antenna radiator 12 can work independently.

[0063] As Figure 7 shown, Figure 7 Figure 1 is a schematic diagram of the currents of the second antenna radiator and the first antenna radiator when the current phase of the feed in an embodiment of the electronic device provided by the embodiment of the present application is 0 degrees. When the current phase provided by the feed 16 is 0 degrees, the current is mainly distributed on the first antenna radiator 11, that is, in the horizontal direction, it is distributed in half-wavelength, with strong current in the middle and weak current at the open ends at both ends.

[0064] As Figure 8 shown, Figure 8 Figure 2 is a schematic diagram of the currents of the second antenna radiator and the first antenna radiator when the current phase of the feed in an embodiment of the electronic device provided by the embodiment of the present application is 90 degrees. When the current phase provided by the feed 16 is 90 degrees, the current is mainly distributed on the second antenna radiator 12, that is, in the vertical direction, it is distributed in half-wavelength, with strong current in the middle and weak current at the open ends at both ends.

[0065] As Figure 9 shown, Figure 9 Figure 3 is a schematic diagram of the radiation range in which the second antenna radiator and the first antenna radiator of the electronic device provided by the embodiment of the present application form a circular polarization characteristic. Since the current phase on the first antenna radiator 11 horizontally to the left leads the current phase of the vertical second antenna radiator 12 by 90 degrees, an electromagnetic wave radiating outwards towards the top edge of the electronic device 10 with left-handed circular polarization is generated. From Figure 9 it can be seen that the left-handed pattern radiates towards the top of the electronic device 10 and has good directivity.

[0066] Definition of the axial ratio of the antenna: The locus of the endpoints of the instantaneous electric field vector of any polarized wave is an ellipse, and the ratio of the major axis to the minor axis of the ellipse is called the axial ratio AR (Axial Ratio). The axial ratio is an important performance index of a circularly polarized antenna. It represents the purity of circular polarization. The bandwidth with an axial ratio not greater than 3 dB is defined as the circular polarization bandwidth of the antenna. It is an important index to measure the difference in signal gain of the whole machine in different directions.

[0067] As Figure 10 shown, Figure 10 Figure 4 is a schematic diagram of the axial ratio in which the second antenna radiator and the first antenna radiator of the electronic device provided by the embodiment of the present application form a circular polarization characteristic. From the axial ratio, it can be seen that the axial ratio at the top of the electronic device 10 of the present application is relatively small, and good circular polarization characteristics are achieved in the beam direction.

[0068] Compared with related technologies, the electronic device includes: a housing, which is hollow and includes a back plate; a first antenna radiator disposed inside the housing; a second antenna radiator rotatably connected to the back plate, and a first end of the second antenna radiator is located outside the housing; the second antenna radiator includes a first posture and a second posture. When the second antenna radiator is in the first posture, the second antenna radiator is folded and attached to the outer surface of the back plate, and the first end of the second antenna radiator moves away from the back plate to unfold into the second posture. When the second antenna radiator is in the second posture, the first antenna radiator is electrically connected to the second antenna radiator. In this application, the first antenna radiator and the second antenna radiator are respectively disposed inside and outside the housing. The second antenna radiator does not occupy the internal space of the electronic device. When the second antenna radiator is in the first posture, the second antenna radiator is folded and attached to the outer surface of the back plate, without increasing the space of the electronic device. At the same time, when the second antenna radiator is in the second posture, the first antenna radiator is electrically connected to the second antenna radiator, and the coupling of the first antenna radiator and the second antenna radiator can improve the radiation performance of the electronic device. Therefore, the radiation performance of the electronic device can be improved without increasing the space of the electronic device.

[0069] The above has introduced in detail an electronic device provided by the present application. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. An electronic device, characterized in that, The electronic device includes: a housing, the housing is hollow, and the housing includes a back plate; a first antenna radiator, the first antenna radiator is disposed inside the housing; a second antenna radiator, the second antenna radiator is rotatably connected to the back plate, and a first end of the second antenna radiator is located outside the housing; the second antenna radiator includes a first posture and a second posture. When the second antenna radiator is in the first posture, the second antenna radiator is folded and attached to an outer surface of the back plate, and the first end of the second antenna radiator moves away from the back plate to expand into the second posture. When the second antenna radiator is in the second posture, the first antenna radiator is electrically connected to the second antenna radiator.

2. The electronic device according to claim 1, wherein Both the first antenna radiator and the second antenna radiator are linear polarization antenna radiators. When the second antenna radiator is in the second posture, the polarization directions of the first antenna radiator and the second antenna radiator are perpendicular.

3. The electronic device according to claim 2, wherein The housing includes a top edge, the first antenna radiator is close to the top edge, and the extending direction of the first antenna radiator is parallel to the extending direction of the top edge. When the second antenna radiator is in the second posture, the extending direction of the second antenna radiator is perpendicular to the outer surface of the back plate.

4. The electronic device according to claim 1, wherein An opening is formed in the outer surface of the back plate, a rotating device is provided on the outer surface of the back plate, the second antenna radiator is connected to the rotating device, and the second antenna radiator rotates around the rotating device. When the second antenna radiator is in the second posture, a second end of the second antenna radiator extends into the housing through the opening and is electrically connected to the first antenna radiator.

5. The electronic device according to claim 4, wherein The electronic device includes a feed source, the feed source is configured to input current to the first antenna radiator. When the second antenna radiator is in the second posture, the second end of the second antenna radiator is electrically connected to a current strong point on the first antenna radiator, where the current strong point is the position where the current is the largest when the first antenna radiator is connected to the feed source.

6. The electronic device according to claim 5, characterized in that, The distance from the midpoint of the second antenna radiator to the current strong point on the first antenna radiator is an odd multiple of a quarter wavelength.

7. The electronic device according to claim 5, wherein The first antenna radiator is a half-wavelength dipole antenna. When the second antenna radiator is in the second posture, the second end of the second antenna radiator is electrically connected to the midpoint of the first antenna radiator.

8. The electronic device according to claim 5, wherein The first antenna radiator is a quarter-wavelength inverted-F antenna. When the second antenna radiator is in the second posture, the second end of the second antenna radiator is electrically connected to the ground point of the first antenna radiator.

9. The electronic device according to claim 5, characterized in that, A feeding point is provided on the first antenna radiator. The feeding point is used to connect to the feed source. The feed source inputs current to the first antenna radiator through the feeding point. The electronic device includes an antenna floor, which is located inside the housing. A supporting portion is provided on the antenna floor, and the first antenna radiator is mounted on the supporting portion. The surface of the antenna floor is parallel to the outer surface of the back plate. The feed source connects the feeding point and the antenna floor.

10. The electronic device according to claim 1, wherein When the first antenna radiator is in the second posture, the second antenna radiator contacts the first antenna radiator to form an electrical connection, or the second antenna radiator is spaced apart from the first antenna radiator by a preset gap and forms a magnetic field coupling.

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