Electronic device

Abstract

The utility model relates to the technical field of wireless communication, and provides electronic equipment which comprises a shell, a circuit board and an annular radiator. The circuit board is arranged in the shell and is provided with a first feed unit and a second feed unit; at least part of the annular radiator is arranged outside the shell, the annular radiator is provided with a first feeding point, a second feeding point and a first grounding point, and the annular radiator is connected to the ground of the circuit board through the first grounding point; a first part, between the first feeding point and the first grounding point, of the annular radiator forms a first branch knot, a second part, between the first grounding point and the second feeding point, of the annular radiator forms a second branch knot, and the circumferential length of the first branch knot is larger than that of the second branch knot; the first feed unit is used for feeding the first feed point to generate a first circularly polarized wave, and the second feed unit is used for feeding the second feed point to generate a second circularly polarized wave. According to the invention, the occupation of limited stacking space of the electronic equipment is reduced, and the communication performance of the electronic equipment and the satellite equipment can be ensured.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of wireless communication, and in particular to an electronic device. BACKGROUND

[0002] With the development of mobile communication technology, the existing antenna structure is widely integrated in electronic devices such as wearable devices, mobile phones, tablets, etc., so that the electronic devices can communicate with satellite devices such as GPS, Beidou satellite and Tianhong satellite. However, in practical application, it is found that the existing antenna structure is difficult to improve the circular polarization gain of the antenna structure while reducing the occupation of the limited stacking space of the electronic device, resulting in that the electronic device cannot communicate well with the satellite device. CONTENT OF THE UTILITY MODEL

[0003] The present disclosure provides an electronic device to at least solve or improve the problem that the existing antenna structure occupies more of the limited stacking space of the electronic device, and it is difficult to ensure the communication performance of the electronic device with the satellite device.

[0004] An electronic device is provided in an embodiment of the present disclosure, comprising: a housing, a circuit board and a ring-shaped radiator;

[0005] The circuit board is arranged in the housing and is provided with a first feeding unit and a second feeding unit;

[0006] At least part of the ring-shaped radiator is arranged outside the housing, the ring-shaped radiator has a first feeding point, a second feeding point and a first grounding point, and the ring-shaped radiator is connected to the circuit board ground through the first grounding point;

[0007] The first part of the ring-shaped radiator between the first feeding point and the first grounding point forms a first branch, and the second part of the ring-shaped radiator between the first grounding point and the second feeding point forms a second branch, and the circumferential length of the first branch is greater than the circumferential length of the second branch;

[0008] When the first feeding unit feeds the first frequency band signal to the first feeding point, the first branch generates a first resonance, the first resonance generates a first circularly polarized wave, and when the second feeding unit feeds the second frequency band signal to the second feeding point, the second branch generates a second resonance, and the second resonance generates a second circularly polarized wave.

[0009] According to the electronic device provided in the embodiment of the present disclosure, the first feeding point, the first grounding point and the second feeding point are sequentially arranged along the circumference of the ring-shaped radiator;

[0010] The third part of the ring-shaped radiator between the first feeding point and the second feeding point does not include any feeding point.

[0011] An electronic device according to an embodiment of the present disclosure, the first stub generates a first resonance in a 1 / 2 wavelength mode, and the second stub generates a second resonance in the 1 / 2 wavelength mode.

[0012] The resonance frequency of the first resonance is less than the resonance frequency of the second resonance.

[0013] An electronic device according to an embodiment of the present disclosure, the operating frequency band of the first resonance covers a BeiDou transmitting frequency band, and the operating frequency band of the second resonance covers a BeiDou receiving frequency band.

[0014] An electronic device according to an embodiment of the present disclosure, the first stub generates two first currents in a first resonance, the two first currents flow towards or away from each other along the extension direction of the first stub to excite the first circularly polarized wave.

[0015] An electronic device according to an embodiment of the present disclosure, the second stub generates two second currents in a second resonance, the two second currents flow towards or away from each other along the extension direction of the second stub to excite the second circularly polarized wave.

[0016] An electronic device according to an embodiment of the present disclosure, the annular radiator is in a circular ring shape, the included angle of the two ends of the first stub with respect to the center of the annular radiator ranges from 195° to 215°, and the included angle of the two ends of the second stub with respect to the center of the annular radiator ranges from 81° to 89°.

[0017] An electronic device according to an embodiment of the present disclosure, the annular radiator further includes a second grounding point, the second grounding point is located on a third portion of the annular radiator between the first feeding point and the second feeding point, and is close to the first feeding point.

[0018] The second grounding point is connected to the circuit board ground, and the portion of the third portion between the second grounding point and the first feeding point forms a first extension of the first stub.

[0019] When the first feeding unit feeds a first frequency band signal to the first feeding point, the first stub and the first extension generate the first resonance.

[0020] An electronic device according to an embodiment of the present disclosure, the annular radiator is in a circular ring shape, and the included angle of the two ends of the first extension with respect to the center of the annular radiator ranges from 9.5° to 10.5°.

[0021] The electronic device provided by the embodiment of the present disclosure, the annular radiator further comprises a third grounding point, the third grounding point is located on a third part of the annular radiator between the first feeding point and the second feeding point, and is close to the second feeding point;

[0022] The third grounding point is connected to the circuit board ground, and a part of the third part between the third grounding point and the second feeding point forms a second extension of the second branch;

[0023] Wherein, when the second feeding unit feeds the second frequency band signal to the second feeding point, the second branch and the second extension generate the second resonance.

[0024] The electronic device provided by the embodiment of the present disclosure, the annular radiator is in the shape of a circular ring, and the included angle of the two ends of the second extension with respect to the center of the annular radiator ranges from 9.5° to 10.5°.

[0025] The electronic device provided by the embodiment of the present disclosure, a gap is formed between the circuit board and the annular radiator, and the width of the gap is not less than 1mm.

[0026] The electronic device provided by the embodiment of the present disclosure, the radius of the annular radiator ranges from 25mm to 32mm.

[0027] The electronic device provided by the embodiment of the present disclosure, by making full use of the annular radiator on the existing shell, connecting the annular radiator and the circuit board based on the first feeding point, the second feeding point and the first grounding point of the annular radiator respectively, realizing the construction of the antenna structure, when feeding the first feeding point and the second feeding point respectively, the first branch and the second branch on the annular radiator can generate circularly polarized radiation of two frequency bands, realizing the transmission and reception of satellite signals, this design not only reduces the occupation of the limited stacking space of the electronic device, but also ensures the communication performance of the electronic device and the satellite device. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the present disclosure or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present disclosure, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0029] Figure 1 is a structural schematic diagram of an exemplary electronic device provided by the present disclosure.

[0030] Figure 2is a structural schematic diagram of another exemplary electronic device provided by the present disclosure.

[0031] Figure 3 is a top view structural schematic diagram of an antenna structure formed based on a ring-shaped radiator provided by an embodiment of the present disclosure.

[0032] Figure 4 is a simulation schematic diagram of the current distribution on the first branch when the first feeding unit feeds the first feeding point to make the first branch produce the first resonance.

[0033] Figure 5 is a simulation schematic diagram of the current distribution on the second branch when the second feeding unit feeds the second feeding point to make the second branch produce the second resonance.

[0034] Figure 6 is an S parameter simulation curve diagram of the first branch and the second branch when the first branch and the second branch are excited to produce circularly polarized waves.

[0035] Figure 7 is an antenna axial ratio curve diagram corresponding to the BeiDou transmitting frequency band produced by the first branch excitation provided by an embodiment of the present disclosure.

[0036] Figure 8 is an antenna axial ratio curve diagram corresponding to the BeiDou receiving frequency band produced by the second branch excitation provided by an embodiment of the present disclosure.

[0037] Reference signs:

[0038] 1, ring-shaped radiator; F1, first feeding point; F2, second feeding point; G1, first grounding point; G2, second grounding point; G3, third grounding point; W1, first branch; W2, second branch;

[0039] 2, circuit board; 201, first feeding unit; 202, second feeding unit; 3, functional device; 4, shell; 41, middle frame; 42, back cover. DETAILED DESCRIPTION

[0040] In order to make the objects, technical solutions and advantages of the present disclosure clearer, the technical solutions in the present disclosure will be described clearly and completely below in conjunction with the drawings in the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present disclosure.

[0041] The following will be described in conjunction with Figures 1-8The electronic device provided by the embodiments of the present disclosure is described in detail through specific embodiments and application scenarios.

[0042] When electromagnetic waves propagate in space, the direction of the electric field varies according to a certain direction, and this variation is the polarization of the electromagnetic wave. That is, the oscillation plane of the electric field defines the polarization direction of the electromagnetic wave. According to the variation mode of the electric field, the polarization of the plane electromagnetic wave can be divided into three types: linear polarization, circular polarization, and elliptical polarization. When the trajectory periodically described by the end point of the electric field vector in space is a circle or an ellipse, and the trajectory rotates along the right-hand screw relationship or the clockwise direction with time, it is called right-handed circular polarization. When the trajectory rotates along the left-hand screw relationship or the counterclockwise direction with time, it is called left-handed circular polarization.

[0043] In a satellite communication system, circularly polarized waves are less affected by multipath effects and polarization distortion (for example, linearly polarized waves will undergo polarization rotation when passing through the ionosphere (commonly known as "Faraday rotation")), and do not have strict placement requirements for the receiving antenna. Therefore, circularly polarized waves are often used. This means that a satellite antenna using circularly polarized waves can maintain high gain within a certain angle range, which is particularly important for electronic devices with satellite communication and navigation functions, as they may need to receive signals in constantly changing directions.

[0044] A circularly polarized wave can be decomposed into two linearly polarized waves that are 90° out of phase and have equal amplitudes and are orthogonal in space. Similarly, two linearly polarized waves that are 90° out of phase and have equal amplitudes and are orthogonal in space can also be combined into a circularly polarized wave. Using this characteristic, a circularly polarized wave can be synthesized as much as possible within the limited design space of an electronic device, especially a mobile electronic device, thereby improving the ability to transmit / receive satellite signals.

[0045] Under circular polarization, the end point of the electric field vector periodically describes an elliptical trajectory in space, and the ratio of the major axis to the minor axis of the ellipse is called the axial ratio. The axial ratio is an important performance indicator of a circularly polarized antenna, and it represents the purity of circular polarization and is an important indicator for measuring the gain difference of an electronic device in different directions. The closer the axial ratio of an antenna to 1 (the end point of the electric field vector periodically describes a circular trajectory in space), the better the circular polarization performance of the antenna.

[0046] The electronic device described by the present disclosure can be a mobile phone, a tablet, a wearable device, a vehicle-mounted device, an Augmented Reality (AR) / Virtual Reality (VR) device, a notebook computer, an Ultra-Mobile Personal Computer (UMPC), a netbook, a Personal Digital Assistant (PDA), etc., which can be a station (STATION, STA) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a computer, a laptop, a handheld communication device, a handheld computing device, and / or other devices for communicating over a wireless system and a next-generation communication system, such as a mobile terminal in a 5G network, a mobile terminal in a future evolved Public Land Mobile Network (PLMN), or a mobile terminal in a future evolved Non-terrestrial Network (NTN), etc.

[0047] By way of example and not limitation, when the electronic device described by the present disclosure is a wearable device, the wearable device can also be a general term for devices that can be worn and are designed and developed by applying wearable technology to daily wear, such as a glove, a watch, an AR (Augmented Reality) head-mounted display device, a VR (Virtual Reality) head-mounted display device, or an MR (Mixed Reality) head-mounted display device, etc., which are configured with a long-range communication module and / or a short-range communication module.

[0048] The present disclosure will use a mobile phone as an exemplary electronic device to exemplarily illustrate the technical solutions of the present disclosure, and it should be understood that the mobile phone does not constitute any artificial limitation on the electronic device of the present disclosure.

[0049] In some embodiments, as shown in Figure 1 , Figure 2 and Figure 3 , Figure 1 is a structural schematic diagram of an exemplary electronic device provided by the present disclosure, Figure 2This is a schematic diagram of the structure of another exemplary electronic device provided in this disclosure. Figure 3 This is a top view of an antenna structure based on a ring radiator according to an embodiment of the present disclosure. The electronic device includes: a housing 4, a circuit board 2, and a ring radiator 1; the circuit board 2 is disposed inside the housing 4 and is provided with a first feed unit 201 and a second feed unit 202; at least a portion of the ring radiator 1 is disposed outside the housing 4, and the ring radiator 1 has a first feed point F1, a second feed point F2, and a first ground point G1. The ring radiator 1 is connected to the circuit board 2 to the ground through the first ground point G1.

[0050] The annular radiator 1 forms a first branch W1 in the first part between the first feed point F1 and the first ground point G1, and forms a second branch W2 in the second part between the first ground point G1 and the second feed point F2. The circumferential length of the first branch W1 is greater than the circumferential length of the second branch W2.

[0051] When the first feeding unit 201 feeds a first frequency band signal to the first feeding point F1, the first stub W1 generates a first resonance, which generates a first circularly polarized wave. When the second feeding unit 202 feeds a second frequency band signal to the second feeding point F2, the second stub W2 generates a second resonance, which generates a second circularly polarized wave.

[0052] For example, when the electronic device is a mobile phone, see Figure 2 As shown, the phone's casing 4 may include a mid-frame 41, a back cover 42, and a display screen (not shown in the figure). The mid-frame 41, back cover 42, and display screen together constitute the internal cavity of the phone. Figure 1 As shown, circuit board 2, battery, processor, memory, and other components are housed within the cavity. In some examples, circuit board 2 may be the motherboard of the mobile phone, located in the upper part of the cavity and close to the top of the battery. The annular radiator 1 may be part of the mobile phone's camera module, such as the metal outer ring of the camera module. The cavity jointly defined by the annular radiator 1 and circuit board 2 can be used to house the camera module's lens, drive motor, image signal processor (ISP), printed circuit board, etc. In some examples, the camera module may include multiple different lens assemblies, such as a telephoto lens, an ultra-wide-angle lens, and a wide-angle lens, all located inside the annular radiator.

[0053] In one example, the annular radiator 1 can be arranged on the surface of the shell 4 of the electronic device as a whole, for example, the annular radiator 1 is arranged on the outer surface of the back cover 42 of the electronic device in the thickness direction of the electronic device; the annular radiator 1 can also be partially exposed on the surface of the shell 4 and partially arranged in the shell 4, for example, the annular radiator 1 is arranged on the outer surface of the back cover 42 in the thickness direction of the electronic device, and the annular radiator 1 extends from the outer surface of the back cover 42 to the direction of the circuit board 2; in the thickness direction of the electronic device, the annular radiator 1 can be lower than the inner surface of the back cover 42, or the annular radiator 1 can be flush with or higher than the inner surface of the back cover 42.

[0054] According to the material selected for the annular radiator 1 in actual application, the annular radiator 1 can be a metal radiator, a graphene radiator or a carbon fiber radiator. The annular radiator 1 can be a decorative part arranged on the surface of the shell 4. According to the shape of the annular radiator 1 configured in actual application, the shape of the annular radiator 1 can be any one of the following: a circular ring, an elliptical ring, a rectangular ring, a rhombic ring or a polygonal ring. Of course, the annular radiator 1 can also be other irregular ring structures.

[0055] For example, the annular radiator 1 is in the shape of a circular ring, and the radius of the annular radiator 1 can be between 25 mm and 32 mm, for example, the radius of the annular radiator 1 can be 25 mm, 26 mm, 28 mm, 30 mm or 32 mm. The width of the annular radiator 1 at any position is between 1 mm and 5 mm, for example, the width of the annular radiator 1 can be 1 mm, 2 mm, 3 mm, 4 mm or 5 mm. In some examples, the width of the annular radiator 1 can be uneven, and in other examples, the width of the annular radiator 1 can be uniform. The annular radiator 1 is arranged on one side of the circuit board 2, the first feeding point F1 of the annular radiator 1 is connected to the first feeding unit 201 on the circuit board 2 through a probe, the second feeding point F2 of the annular radiator 1 is connected to the second feeding unit 202 on the circuit board 2 through a probe, and the first grounding point G1 of the annular radiator 1 is connected to the grounding end on the circuit board 2 through a probe.

[0056] The first feeding unit 201 and the second feeding unit 202 can be a radio frequency system on the circuit board 2 or a radio frequency front end part in the radio frequency system, and are used to provide radio frequency signal feeding. The circuit board 2 selects a PCB (Printed Circuit Board) board, which is composed of multiple layers of medium plates pressed together. There are metal plating layers in the multiple layers of medium plates, which can be used as a grounding plate to realize connection with the first grounding point G1 of the annular radiator 1.

[0057] The probe can be a spring needle or other suitable structure such as a spring sheet and the like, and the diameter of the probe is less than the width of the annular radiator 1, for example, the diameter of the probe is 0.5mm-1mm, and the diameter of the probe can be 0.5mm, 0.8mm or 1mm or other suitable size.

[0058] Since the annular radiator 1 is annular, the first branch W1 and the second branch W2 are both part of the annular radiator 1, and the first branch W1 and the second branch W2 both have an extension close to or similar to an arc shape, when the first feed unit 201 feeds the corresponding radio frequency signal current to the first feed point F1, the first branch W1 can resonate under the excitation of the feed signal, for example, when the first frequency band signal current is fed, the first branch W1 can form two currents with equal amplitude and a phase difference of 90º, thereby exciting the first circularly polarized wave; correspondingly, when the second feed unit 202 feeds the corresponding radio frequency signal current to the second feed point F2, the second branch W2 can also resonate under the excitation of the feed signal, for example, when the second frequency band signal current is fed, the second branch W2 can form two currents with equal amplitude and a phase difference of 90º, thereby exciting the second circularly polarized wave. Since the lengths of the first branch W1 and the second branch W2 are different, the corresponding resonant frequencies of the first branch W1 and the second branch W2 are also different, and the sizes of the annular radiator 1 and the two branches can be designed so that the resonant frequencies of the two branches correspond to multiple transmission and reception frequency bands of a satellite communication system such as Global Positioning System (GPS), Global Navigation Satellite System (GLONASS), BeiDou Navigation Satellite System (BDS), Quasi-Zenith satellite System (QZSS), Satellite Based Augmentation Systems (SBAS) and / or Low Earth Orbit Satellite Communication System, which enables the antenna structure based on the annular radiator 1 to generate circularly polarized waves of multiple frequency bands for satellite system communication. Among them, the first frequency band signal can be used as a satellite transmission signal, and the second frequency band signal can be used as a satellite reception signal.

[0059] The present disclosure makes full use of the annular radiator 1 on the existing shell 4, electrically connects the annular radiator 1 and the circuit board 2 based on the first feed point F1, the second feed point F2 and the first grounding point G1 of the annular radiator 1 respectively, realizes the construction of the antenna structure, and can generate circularly polarized waves of two frequency bands through the first branch W1 and the second branch W2 on the annular radiator 1 when feeding the first feed point F1 and the second feed point F2 respectively, so as to realize the transmission and reception of satellite signals. This design not only reduces the occupation of the limited stacking space of the electronic device, but also ensures the communication performance of the electronic device and the satellite device.

[0060] In some embodiments, as shown in Figure 1 and Figure 3 , the first feed point F1, the first grounding point G1 and the second feed point F2 are sequentially arranged along the circumference of the annular radiator 1, for example, the first feed point F1, the first grounding point G1 and the second feed point F2 are spaced from each other, and are sequentially arranged in the counterclockwise direction. The third part of the annular radiator 1 between the first feed point F1 and the second feed point F2 does not include any feed point.

[0061] In some embodiments, the first branch W1 of the present disclosure generates a first resonance in a 1 / 2 wavelength mode, and the second branch W2 generates a second resonance in a 1 / 2 wavelength mode; wherein the resonance frequency of the first resonance is less than the resonance frequency of the second resonance.

[0062] Optionally, the working frequency band of the first resonance covers the Beidou transmitting frequency band, and the frequency range of the Beidou transmitting frequency band is 1615.68±4.08MHz. The working frequency band of the second resonance covers the Beidou receiving frequency band, and the frequency range of the Beidou receiving frequency band is 2491.75±4.08MHz.

[0063] At the same time, the arc length of the first branch W1 corresponds to 1 / 2 working wavelength of the Beidou transmitting frequency band, which can ensure that the first branch W1 resonates at the frequency point corresponding to the Beidou transmitting frequency band. The arc length of the second branch W2 corresponds to 1 / 2 working wavelength of the Beidou receiving frequency band, which can ensure that the second branch W2 resonates at the frequency point corresponding to the Beidou receiving frequency band.

[0064] Further, as shown in Figure 4 , Figure 4 is a simulation diagram of the current distribution on the first branch when the first feed unit feeds the first feed point to make the first branch generate the first resonance. It can be seen that when the first feed point F1 is fed with the first frequency band signal current to make the first branch W1 generate the first resonance, the endpoints of the first branch W1 form two current strong points, and the middle part of the first branch W1 forms a current weak point. Thus, two first currents are formed on the first branch W1, which flow towards or away from each other along the first branch W1 to excite the formation of the first circularly polarized wave.

[0065] Specifically, when the first feeding unit feeds the first frequency band signal to the first feeding point F1, the first stub W1 generates the first resonance. At this time, the first feeding point F1 where one end of the first stub W1 is located and the second grounding point G2 corresponding to the first feeding point F1 are both strong current points. The first grounding point G1 where the other end of the first stub W1 is located is also a strong current point. A weak current point a1 is formed in the middle of the first stub W1.

[0066] In practical operation, the two first currents will oscillate periodically along the first branch W1 relative to the current weakness a1. The oscillation frequency is the same as the frequency of the input first frequency band signal current. That is, at the previous moment, both first currents point to the current weakness a1, and at the next moment, both first currents point to their respective current strength points, and then alternate in this pattern. The two first currents in... Figure 4 The first current is used in the middle respectively and the first current Mark it.

[0067] like Figure 4 As shown in the illustration, this embodiment demonstrates the use of arrows to indicate the first current. and the first current In the direction. Following... Figure 4 The directions indicated by the xyz coordinate system shown are: x-axis to the right, y-axis to the front, and z-axis to the top. This relates to the first current between the current weak point a1 of the first branch W1 and the second grounding point G2. At this moment, the first current The equivalent direction can be considered as roughly from the current weakness point a1 to the second grounding point G2.

[0068] Correspondingly, for the first current between the current weakness 1 of the first branch W1 and the first grounding point G1 At this moment, the first current The equivalent direction can be considered as roughly from the current weakness point a1 to the first grounding point G1.

[0069] Thus, when the first feeding unit feeds the first frequency band signal to the first feeding point F1, the first branch W1 is divided into two segments with the current weakness point a1 as the boundary. Two equivalent first currents that are nearly orthogonally distributed are formed on these two segments. and the first current And the first current and the first current The current amplitudes are equal, and the current phase difference can be approximated as close to 90°, which can resonate to generate the first circularly polarized wave.

[0070] In some embodiments, such asFigure 5 As shown, Figure 5 This is a simulation diagram of the current distribution on the second stub when the second feeding unit feeds power to the second feeding point to cause the second stub to generate a second resonance, according to an embodiment of this disclosure. It can be seen that when the second feeding unit feeds the second frequency band signal current to the second feeding point F2 to cause the second stub W2 to generate a second resonance, two strong current points are formed at the endpoints of the second stub W2, and a weak current point is formed in the middle of the second stub W2. Thus, two second currents are formed on the second stub W2. The two second currents flow towards or away from each other along the second stub W2 to excite the formation of a second circularly polarized wave.

[0071] Specifically, when the second feeding unit feeds the second frequency band signal to the second feeding point F2, the second branch W2 generates a second resonance. At this time, the second feeding point F2 where one end of the second branch W2 is located and the third grounding point G3 corresponding to the second feeding point F2 are both strong current points. The first grounding point G1 where the other end of the second branch W2 is located is also a strong current point. A weak current point a2 is formed in the middle of the second branch W2.

[0072] In practical operation, the two second currents will oscillate periodically along the second branch W2 relative to the current weakness a2. The oscillation frequency is the same as the frequency of the input second-band signal current. That is, at the previous moment, both second currents point to the current weakness a2, and at the next moment, they point to their respective current strength points, and then alternate in this pattern. Figure 5 The second current is used in the middle respectively Second current Mark it.

[0073] like Figure 5 As shown in the illustration, the second current is indicated by an arrow in this embodiment. Second current Relative to the direction of the current weakness point a2. According to... Figure 5 The directions indicated by the xyz coordinate system shown are: x-axis to the right, y-axis to the front, and z-axis to the top. This relates to the second current between the current weakness point a2 of the second branch W2 and the third grounding point G3. At this moment, the second current The equivalent direction can be considered as roughly from the third grounding point G3 to the current weakness point a2.

[0074] Correspondingly, for the second current between the current weakness a2 of the second branch W2 and the first grounding point G1 At this moment, the second current The equivalent direction can be considered as roughly from the first grounding point G1 to the current weakness point a2.

[0075] Thus, when the second feeding unit feeds the second frequency band signal to the second feeding point F2, the second branch W2 is divided into two sections by the current weak point a2, and two equivalent currents are formed on the two sections, which are approximately in orthogonal distribution and the second current , and the second current and the second current have equal current amplitudes and a phase difference of approximately 90°, and can resonate to generate a second circularly polarized wave.

[0076] In some embodiments, as shown in Figure 1 and Figure 3 , the annular radiator 1 is in the shape of a circular ring, and the included angle of the two ends of the first branch W1 with respect to the center of the annular radiator 1 is in the range of 195° to 215°; and the included angle of the two ends of the second branch W2 with respect to the center of the annular radiator 1 is in the range of 81° to 89°.

[0077] Specifically, the center of the annular radiator 1 is marked with the letter “o”, and the included angle of the two ends of the first branch W1 with respect to the center of the annular radiator 1 is the central angle a formed by the first feeding point F1 and the first grounding point G1 with respect to the center of the annular radiator 1, which can be 195°, 200°, 210°, 215°, or other suitable angles.

[0078] At the same time, the included angle of the two ends of the second branch W2 with respect to the center of the annular radiator 1 is the central angle β formed by the second feeding point F2 and the first grounding point G1 with respect to the center of the annular radiator 1, which can be 81°, 83°, 85°, 88°, 89°, or other suitable angles.

[0079] In some embodiments, as shown in Figure 1 and Figure 3 , the annular radiator 1 further comprises a second grounding point G2, which is located on a third portion of the annular radiator 1 between the first feeding point F1 and the second feeding point F2, and is close to the first feeding point F1.

[0080] The second grounding point G2 is connected to the ground of the circuit board 2, and the portion of the third portion between the second grounding point G2 and the first feeding point F1 forms a first extension of the first branch W1.

[0081] It can be understood that, when the first feeding unit feeds the first frequency band signal to the first feeding point F1, the first branch W1 and the first extension generate a first resonance, and the second grounding point G2 can be configured to be grounded by inductance, and the second grounding point G2 is used to provide impedance matching for the feeding at the first feeding point F1, so as to ensure the antenna radiation performance of the first branch W1.

[0082] Further, asFigure 1 and Figure 3 As shown in FIGS. 1 and 2, the annular radiator 1 is in the shape of a circular ring, and the included angle of the two ends of the first extension part with respect to the center of the annular radiator 1 ranges from 9.5° to 10.5°.

[0083] Specifically, the included angle of the two ends of the first extension part with respect to the center of the annular radiator 1 is the central angle of the first feeding point F1 and the second grounding point G2 with respect to the center of the annular radiator 1, and the central angle can be 9.5°, 10°, 10.5°, or other suitable angles.

[0084] In some embodiments, as shown in FIGS. 3 and 4, the annular radiator 1 further includes a third grounding point G3, the third grounding point G3 is located on a third part of the annular radiator 1 between the first feeding point F1 and the second feeding point F2, and is close to the second feeding point F2. Figure 1 Figure 3 As shown in FIGS. 3 and 4, the third grounding point G3 is connected to the ground of the circuit board 2, and the part of the third part between the third grounding point G3 and the second feeding point F2 is formed as a second extension part of the second branch W2.

[0085] It can be understood that when the second feeding unit feeds the second frequency band signal to the second feeding point F2, the second branch W2 and the second extension part generate a second resonance, and the third grounding point G3 can be configured to be grounded through inductance, and the third grounding point G3 is used to provide impedance matching for the feeding at the second feeding point F2 to ensure the antenna radiation performance of the second branch W2.

[0086] Further, as shown in FIGS. 5 and 6, the annular radiator 1 is in the shape of a circular ring, and the included angle of the two ends of the second extension part with respect to the center of the annular radiator 1 ranges from 9.5° to 10.5°.

[0087] Specifically, the included angle of the two ends of the second extension part with respect to the center of the annular radiator 1 is the central angle of the second feeding point F2 and the third grounding point G3 with respect to the center of the annular radiator 1, and the central angle can be 9.5°, 10°, 10.5°, or other suitable angles. Figure 1 Figure 3 In some embodiments, as shown in FIGS. 7 and 8, a gap is formed between the circuit board 2 and the annular radiator 1, and the width of the gap is not less than 1 mm.

[0088] It can be understood that the annular radiator 1 is arranged on one side of the circuit board 2, and the circuit board 2 and the annular radiator 1 form a gap antenna. The plane where the annular radiator 1 is located and the plane where the circuit board 2 is located are parallel, and a gap not less than 1 mm is formed between the two planes.

[0089] In some embodiments, as shown in FIGS. 7 and 8, a gap is formed between the circuit board 2 and the annular radiator 1, and the width of the gap is not less than 1 mm. Figure 1 It can be understood that the annular radiator 1 is arranged on one side of the circuit board 2, and the circuit board 2 and the annular radiator 1 form a gap antenna. The plane where the annular radiator 1 is located and the plane where the circuit board 2 is located are parallel, and a gap not less than 1 mm is formed between the two planes.

[0090] It can be understood that the annular radiator 1 is arranged on one side of the circuit board 2, and the circuit board 2 and the annular radiator 1 form a gap antenna. The plane where the annular radiator 1 is located and the plane where the circuit board 2 is located are parallel, and a gap not less than 1 mm is formed between the two planes.​​

[0091] Exemplarily, in the case that the annular radiator 1 is in the shape of a circular ring, the central axis of the annular radiator 1 is perpendicular to the surface of the circuit board 2, so that a gap of a certain size is kept between the annular radiator 1 and the circuit board 2.

[0092] The width of the gap between the circuit board 2 and the annular radiator 1 can be 1mm-4mm, for example, the width of the gap can be 1mm, 2mm, 3mm, 4mm and other suitable sizes, which are not specifically limited.

[0093] In some embodiments, as shown in Figure 1 and Figure 2 The shell 4 includes a middle frame 41 and a rear cover 42, the rear cover 42 is arranged on one side of the middle frame 41, the other side of the middle frame 41 is used for mounting a display module, the circuit board 2 is arranged in the area defined by the middle frame 41, and the annular radiator is arranged on the rear cover 42, the inner side of the annular radiator is used for mounting the functional device 3, and the functional device 3 includes a camera module and / or a flash module.

[0094] The rear cover 42 is provided with an opening, the functional device 3 is arranged through the opening and is electrically connected with the circuit board 2, and the circuit board 2 and the display module are electrically connected.

[0095] As shown in Figure 6 , Figure 6 is a simulation curve diagram of S parameters of the first branch and the second branch when generating circularly polarized waves, which includes return loss curves (S1,1, S2,2) and isolation curves (S1,2, S2,1). The antenna return loss can be represented by the S11 parameter, and S11 and S22 belong to the S parameters, which respectively represent the S parameters of the first feed point F1 and the S parameters of the second feed point F2. The present disclosure exemplarily uses S11 for illustration.

[0096] S11 represents the reflection coefficient, which can represent the advantages and disadvantages of the antenna transmission efficiency. S11 parameter is usually negative, the smaller the S11 parameter, the smaller the antenna return loss, the smaller the energy reflected back by the antenna itself, that is, the more the actual energy entering the antenna, and the higher the system efficiency of the antenna; the larger the S11 parameter, the larger the antenna return loss, and the lower the system efficiency of the antenna. It should be noted that in engineering, -6dB is generally used as the standard for S11 value, when the S11 value of the antenna is less than -6dB, it can be considered that the antenna can work normally, or it can be considered that the transmission efficiency of the antenna is better. The S12 parameter represents the signal isolation degree between the two feed ports F1 and F2.

[0097] According to Figure 6As shown by the S1,1 curves, when feeding to the first feed point F1, the S11 parameter in the BeiDou transmitting frequency band (1615.68±4.08MHz) is -12.13dB, which is much less than -6dB, and the S11 parameter in the BeiDou receiving frequency band (2491.75±4.08MHz) is -24.46dB, which is also much less than -6dB. This demonstrates that the excitation signal generated by the antenna structure shown in this disclosure achieves coverage of both the BeiDou transmitting frequency band (1615.68±4.08MHz) and the BeiDou receiving frequency band (2491.75±4.08MHz), exhibiting good matching in these two frequency bands. According to... Figure 6 As can be seen from the S12 curve, under all the exemplary frequency bands of this disclosure, the S12 parameter between port F1 and port F2 is less than -12dB. It can be seen that the isolation of the antenna structure shown in this disclosure is better than -10dB, thus having good isolation.

[0098] like Figure 7 As shown, Figure 7 This is an antenna axial ratio curve corresponding to the BeiDou transmission frequency band generated by the first stub excitation provided in one embodiment of this disclosure, based on... Figure 7 It can be seen that when the angle phi = 205° in the azimuth plane and the angle heat = 80° in the elevation plane, the axial ratio of the first stub W1 is 1.35dB; when the angle phi = 210° in the azimuth plane and the angle heat = 80° in the elevation plane, the axial ratio of the first stub W1 is 1.75dB. It can be seen that within the BeiDou transmission frequency band (1615.68±4.08MHz), the axial ratio of the radiated signal of the first stub W1 at resonance is less than 3dB, which has good axial ratio characteristics. Thus, the radiated signal of the first stub W1 achieves good circular polarization characteristics.

[0099] like Figure 8 As shown, Figure 8 This is an antenna axial ratio curve corresponding to the BeiDou receiving frequency band generated by the second stub excitation provided in one embodiment of this disclosure, based on... Figure 8 It can be seen that when the angle phi = 190° in the azimuth plane and the angle heat = 100° in the elevation plane, the axial ratio of the second stub W2 is 0.41dB (less than 3dB). That is, when the second stub W2 resonates in the BeiDou receiving frequency band (2491.75±4.08MHz), the axial ratio of the radiated signal is less than 3dB, which has good axial ratio characteristics. Thus, the radiated signal of the second stub W2 achieves good circular polarization characteristics.

[0100] Therefore, the electronic device disclosed herein can realize BeiDou satellite communication based on the ring radiator 1, and has good circular polarization characteristics (axis ratio less than 3dB) in both the transmission and reception frequency bands, ensuring the communication performance between the electronic device and the satellite device.

[0101] It should be finally pointed out that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some technical features therein; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. An electronic device, comprising: The shell, the circuit board and the annular radiator; The circuit board is arranged in the shell and is provided with a first feeding unit and a second feeding unit; At least part of the annular radiator is arranged outside the shell, the annular radiator has a first feeding point, a second feeding point and a first grounding point, and the annular radiator is connected to the circuit board ground through the first grounding point; The first part of the annular radiator between the first feeding point and the first grounding point forms a first branch, and the second part of the annular radiator between the first grounding point and the second feeding point forms a second branch, and the circumferential length of the first branch is greater than the circumferential length of the second branch; When the first feeding unit feeds the first frequency band signal to the first feeding point, the first branch generates a first resonance, and the first resonance generates a first circularly polarized wave; when the second feeding unit feeds the second frequency band signal to the second feeding point, the second branch generates a second resonance, and the second resonance generates a second circularly polarized wave. 2.The electronic device of claim 1, wherein, The first feeding point, the first grounding point and the second feeding point are sequentially arranged along the circumference of the annular radiator; The third part of the annular radiator between the first feeding point and the second feeding point does not include any feeding point. 3.The electronic device of claim 1, wherein, The first branch generates a first resonance in a 1 / 2 wavelength mode, and the second branch generates a second resonance in a 1 / 2 wavelength mode; The resonance frequency of the first resonance is less than the resonance frequency of the second resonance.

4. The electronic device of claim 3, wherein, The working frequency band of the first resonance covers the Beidou transmitting frequency band, and the working frequency band of the second resonance covers the Beidou receiving frequency band.

5. The electronic device of claim 3, wherein, The first branch generates two first currents under the first resonance, and the two first currents flow towards or away from each other along the extension direction of the first branch to excite the formation of the first circularly polarized wave.

6. The electronic device of claim 3, wherein, The second branch generates two second currents under the second resonance, and the two second currents flow towards or away from each other along the extension direction of the second branch to excite the formation of the second circularly polarized wave.

7. The electronic device of claim 1, wherein, The annular radiator is in the form of a circular ring, and the included angle of the two ends of the first branch with respect to the center of the annular radiator ranges from 195° to 215°; the included angle of the two ends of the second branch with respect to the center of the annular radiator ranges from 81° to 89°.

8. The electronic device of claim 1, wherein, The annular radiator further includes a second grounding point, the second grounding point is located in the third part of the annular radiator between the first feeding point and the second feeding point, and is close to the first feeding point; The second grounding point is connected to the circuit board ground, and the part of the third part between the second grounding point and the first feeding point forms a first extension of the first branch; When the first feeding unit feeds the first frequency band signal to the first feeding point, the first branch and the first extension generate the first resonance.

9. The electronic device of claim 8, wherein, The annular radiator is in the form of a circular ring, and the included angle of the two ends of the first extension with respect to the center of the annular radiator ranges from 9.5° to 10.5°. 10.The electronic device of claim 1, wherein, The annular radiator further comprises a third grounding point located on a third portion of the annular radiator between the first feeding point and the second feeding point and close to the second feeding point; The third grounding point is connected to the circuit board ground, and a portion of the third portion between the third grounding point and the second feeding point forms a second extension of the second branch; When the second feeding unit feeds a second frequency band signal to the second feeding point, the second branch and the second extension generate the second resonance.

11. The electronic device of claim 10, wherein, The annular radiator is in the shape of a circular ring, and the included angle of the two ends of the second extension with respect to the center of the annular radiator ranges from 9.5° to 10.5°.

12. The electronic device of any one of claims 1 to 11, wherein, A gap is formed between the circuit board and the annular radiator, and the width of the gap is not less than 1 mm.

13. The electronic device of any one of claims 1 to 11, wherein, The radius of the annular radiator is between 25 mm and 32 mm.

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