Electronic device

Abstract

The embodiment of the invention relates to electronic equipment, and the equipment comprises a feed source which is used for providing a feed signal; the grounding plate is provided with a long side extending along the first direction; the first radiation branch knot is provided with a first feeding point connected with the feed source; the second radiation branch knot is provided with a second feeding point connected with the feed source, and the first radiation branch knot and the second radiation branch knot at least partially extend in the first direction; the second direction is perpendicular to the first direction; wherein the first radiation branch knot and the second radiation branch knot are used for simultaneously generating excitation current in the same direction under excitation of a feed signal, and are coupled with the grounding plate to excite longitudinal current, parallel to the first direction, on the grounding plate, so that the first radiation branch knot, the second radiation branch knot and the grounding plate jointly support a first frequency band.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of communication technology, and in particular, to an electronic device. Background Art

[0002] With the continuous development of communication technology, people have higher and higher requirements for electronic devices with communication functions such as mobile phones. For example, electronic devices are required to have good communication quality so that they can maintain relatively stable communication in weak network scenarios such as when the electronic devices are blocked by the head or hands. However, the communication quality of current electronic devices can no longer meet the needs of users. Summary of the invention

[0003] Based on this, it is necessary to address the above technical issues. The present application provides an electronic device, including:

[0004] A feed source, used for providing a feed signal;

[0005] A ground plate having a long side extending along a first direction;

[0006] A first radiation branch having a first feeding point connected to the feed source;

[0007] A second radiation branch node has a second feeding point connected to the feed source, the first radiation branch node and the second radiation branch node respectively extend at least partially along a first direction; the second direction is perpendicular to the first direction;

[0008] Among them, the first radiation branch and the second radiation branch are used to simultaneously generate excitation currents with the same direction under the excitation of the feeding signal, and are coupled with the grounding plate to excite the longitudinal current on the grounding plate parallel to the first direction, so that the first radiation branch, the second radiation branch and the grounding plate jointly support the first frequency band.

[0009] The above-mentioned electronic device, based on the connection relationship between the first feeding point, the second feeding point and the feed source, can generate an excitation current on the first radiating branch and the second radiating branch at the same time by direct feeding, and further excite the longitudinal current on the grounding plate by coupling, so that the radiation of the signal of the first frequency band is supported by the first radiating branch, the second radiating branch and the grounding plate, so as to enhance the radiation efficiency and expand the bandwidth, thereby improving the radio frequency performance of the electronic device. Moreover, under the premise of effectively exciting the longitudinal current on the grounding plate, there is no need to set a tuning circuit to change the electrical length of the first radiating branch or the second radiating branch, and the electronic device can cover the entire frequency band of the first frequency band. Therefore, this embodiment can reduce the number of components that need to be set in the electronic device, thereby reducing the volume of the electronic device and reducing the overall cost of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0011] Figure 1 This is one of the structural schematic diagrams of an electronic device according to an embodiment;

[0012] Figure 2 This is a second structural schematic diagram of an electronic device according to an embodiment;

[0013] Figure 3 A current distribution diagram of an electronic device according to an embodiment when operating at 720 MHz;

[0014] Figure 4 An antenna pattern of an electronic device according to an embodiment when operating at 720 MHz;

[0015] Figure 5 A current distribution diagram of an electronic device according to an embodiment when operating at 940 MHz;

[0016] Figure 6 An antenna pattern of an electronic device according to an embodiment when operating at 940 MHz;

[0017] Figure 7 A current distribution diagram of an electronic device according to an embodiment when operating at 810 MHz;

[0018] Figure 8 An antenna pattern of an electronic device according to an embodiment when operating at 810 MHz;

[0019] Fig. 9 A data diagram of an S11 parameter of an electronic device according to an embodiment;

[0020] Fig.10 is an efficiency data diagram of an electronic device according to an embodiment;

[0021] Fig.11 is a comparison diagram of the efficiency of an electronic device of an embodiment in the case of no shielding and one-right-handedness;

[0022] Fig.12 is a comparison diagram of the efficiency of an electronic device of an embodiment in the case of no obstruction and one left hand;

[0023] Fig.13 is a comparison diagram of the efficiency of an electronic device of an embodiment in the case of no obstruction and right head and hand;

[0024] Fig.14 is a comparison diagram of the efficiency of an electronic device of an embodiment in the case of no obstruction and left head and hand;

[0025] Fig.15 This is a comparison diagram of the efficiency of an electronic device according to an embodiment when there is no obstruction and the screen is held with both hands in landscape mode with the USB port facing right;

[0026] Fig.16 This is a comparison diagram of the efficiency of an electronic device of an embodiment when there is no obstruction and the screen is held with both hands in landscape mode with the USB port facing left;

[0027] Fig.17 The third structural diagram of an electronic device according to an embodiment;

[0028] Fig.18 This is a fourth structural diagram of an electronic device according to an embodiment;

[0029] Fig.19 The figure is a diagram showing the internal structure of an electronic device according to an embodiment.

[0030] Component number description:

[0031] The first radiating branch: 100; the second radiating branch: 200; the grounding plate: 300; the long side: 310; the short side: 320; the first connecting line: 410; the second connecting line: 420; the cable connecting seat: 421; the third radiating branch: 500; the first radiating section: 510; the second radiating section: 520; the combiner: 600; the fourth radiating branch: 700. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0033] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first feed point may be referred to as a second feed point, and similarly, a second feed point may be referred to as a first feed point.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. "Multiple" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined. "Several" means at least one, such as one, two, etc., unless otherwise clearly and specifically defined.

[0035] The embodiment of the present application provides an electronic device, which includes an antenna assembly for communication. The electronic device may be, but is not limited to, various personal computers, laptops, smart phones, tablet computers, Internet of Things devices, and portable wearable devices. The Internet of Things devices may be smart speakers, smart TVs, smart air conditioners, smart car devices, etc. The portable wearable devices may be smart watches, smart bracelets, head-mounted devices, etc.

[0036] Figure 1 FIG. 1 is a schematic diagram of a structure of an electronic device according to an embodiment of the present invention. Figure 1 The electronic device includes a feed source S1, a ground plate 300, a first radiation branch 100 and a second radiation branch 200.

[0037] Among them, the feed source S1 is used to provide a feed signal, the first radiating branch 100 has a first feed point F1 connected to the feed source S1, and the second radiating branch 200 has a second feed point F2 connected to the feed source S1. That is, the first radiating branch 100 and the second radiating branch 200 are connected to the same feed source S1. Optionally, the first radiating branch 100 and the second radiating branch 200 can be respectively connected to the feed source S1 through two independent feeding paths, or can be connected to the feed source S1 through a shared part of the feeding path, which is not limited in this embodiment. On the premise that the first radiating branch 100 and the second radiating branch 200 are connected to the same feed source S1, when the feed source S1 provides a feed signal, the first radiating branch 100 and the second radiating branch 200 can synchronously receive the above-mentioned feed signal, so that the first radiating branch 100 and the second radiating branch 200 simultaneously generate excitation current under the excitation of the feed signal.

[0038] Optionally, the first radiation branch 100 and the second radiation branch 200 can be any one of a laser direct structuring (LDS) radiation branch, a flexible printed circuit (FPC) radiation branch, a print direct structuring (PDS) radiation branch and a metal branch radiation branch, and the radiator type of the first radiation branch 100 and the second radiation branch 200 can be the same or different. The first radiation branch 100 and the second radiation branch 200 can be a mechanical design antenna (MDA) radiation branch designed using the metal embedding of the electronic device itself. For example, the first radiation branch 100 and the second radiation branch 200 can be antenna radiation branches designed using the middle frame formed of plastic and metal of the electronic device.

[0039] In addition, the present embodiment does not specifically limit the shape, structure and material of the first radiating branch 100 and the second radiating branch 200. The shapes of the first radiating branch 100 and the second radiating branch 200 include but are not limited to bent, straight, L-shaped, sheet-shaped, rod-shaped, coated, thin film, etc. When the first radiating branch 100 and the second radiating branch 200 are in strip shape, the present embodiment does not limit the extension trajectory of the first radiating branch 100 and the second radiating branch 200, so the first radiating branch 100 and the second radiating branch 200 can be extended in a straight line, a curve, a multi-stage bend, etc. The first radiating branch 100 and the second radiating branch 200 can be a line with uniform width on the extension trajectory, or an irregular shape with different widths such as a gradual width and a widened area. In the schematic diagram of the present embodiment, the first radiating branch 100 and the second radiating branch 200 extend along a straight line trajectory. It can be understood that the first radiating branch 100 and the second radiating branch 200 shown in the schematic diagram of the present embodiment should not be understood as a limitation of the first radiating branch 100 and the second radiating branch 200 provided in the implementation manner of the present embodiment.

[0040] It can be understood that in the electronic device, not only the first radiation branch 100 and the second radiation branch 200 can be used to radiate signals, but the grounding plate 300 made of conductive material can also radiate signals when excited. Specifically, the grounding plate 300 can be spaced apart from the first radiation branch 100 and the second radiation branch 200, and when the excitation current is generated on the first radiation branch 100 and the second radiation branch 200, the grounding current is generated by coupling. That is, the feed source S1 can simultaneously excite the excitation current on the first radiation branch 100 and the second radiation branch 200, as well as the grounding plate 300 through a feeding signal, so that the first radiation branch 100, the second radiation branch 200 and the grounding plate 300 radiate signals together. Among them, the grounding current can include a longitudinal component and a transverse component, the longitudinal component can be called a longitudinal current, and the transverse component can be called a transverse current. Moreover, under the action of different feeding signals, the current distribution on the first radiation branch 100 and the second radiation branch 200 will also change accordingly, so that the proportion of the longitudinal component and the transverse component in the floor current generated by coupling will also be different, thereby changing the radiation performance of the grounding plate 300.

[0041] The grounding plate 300 has a long side 310 extending along a first direction, and the first radiation branch 100 and the second radiation branch 200 extend at least partially along the first direction, respectively. The second direction is perpendicular to the first direction. Specifically, the extension direction of the first radiation branch 100 and the second radiation branch 200 will affect the direction of the excitation current, and further affect the direction of the floor current generated by coupling. Therefore, this embodiment can effectively excite the longitudinal current in the grounding plate 300 through the position setting of the first radiation branch 100 and the second radiation branch 200. Furthermore, the directions of the excitation currents on the first radiation branch 100 and the second radiation branch 200 are the same, so that the direction of the longitudinal current generated by the coupling of the first radiation branch 100 and the grounding plate 300 is the same as the direction of the longitudinal current generated by the coupling of the first radiation branch 100 and the grounding plate 300, thereby reducing the situation where the longitudinal currents generated by the coupling of the grounding plate 300 and different radiation branches cancel each other out, achieving effective excitation of the grounding plate 300, and then making the first radiation branch 100, the second radiation branch 200 and the grounding plate 300 jointly support the first frequency band, improving the radiation efficiency and bandwidth of the electronic device. The first frequency band can be, but is not limited to, any one of low frequency, medium frequency, high frequency and ultra-high frequency.

[0042] In the embodiment of the application, based on the connection relationship between the first feeding point F1, the second feeding point F2 and the feed source S1, the excitation current can be simultaneously generated on the first radiating branch 100 and the second radiating branch 200 by direct feeding, and the longitudinal current on the grounding plate 300 can be further excited by coupling, so that the radiation of the signal of the first frequency band is jointly supported by the first radiating branch 100, the second radiating branch 200 and the grounding plate 300, so as to enhance the radiation efficiency and expand the bandwidth, thereby improving the radio frequency performance of the electronic device. Moreover, under the premise of effectively exciting the longitudinal current on the grounding plate 300, there is no need to set a tuning circuit to change the electrical length of the first radiating branch 100 or the second radiating branch 200, and the electronic device can cover the full frequency band of the first frequency band. Therefore, this embodiment can reduce the number of components that need to be set in the electronic device, thereby reducing the volume of the electronic device and reducing the overall cost of the electronic device.

[0043] In one embodiment, the electronic device may further include a middle frame, a display screen and a housing. The middle frame includes a frame body and a frame, and the frame is arranged around the periphery of the frame body. The display screen and the housing are respectively arranged on the opposite sides of the frame body of the middle frame. It can be understood that the above introduction to the electronic device is only an introduction to an application environment of the antenna assembly such as the first radiation branch 100 and the second radiation branch 200, and other components other than the antenna assembly in the electronic device should not be understood as a limitation of the antenna assembly provided in the embodiment of the present application. The grounding plate 300 may be, but is not limited to, the frame body of the middle frame in the electronic device, or the ground in the circuit board, or the shielding part of the display screen, or the conductive battery cover, etc. In other embodiments, the grounding plate 300 may also be a separate ground independent of the frame body of the electronic device, the ground of the circuit board, the shielding part of the display screen, and the conductive battery cover. Among them, the frame of the electronic device may include a top frame, a first side frame, a bottom frame, and a second side frame connected in sequence. Optionally, the first radiation branch 100 and the second radiation branch 200 can be at least partially arranged on the side frame of the electronic device or near the side frame of the electronic device. The first radiation branch 100 and the second radiation branch 200 can be arranged on the same side frame or different side frames of the electronic device, which is not limited here.

[0044] In one embodiment, the first frequency band includes a low frequency band of 700MHz to 960MHz, the main low frequency bands are but not limited to B28, B20, B5 and B8, the B28 band includes 703MHz to 803MHz, the B20 band and the B5 band are similar to 824MHz to 896MHz, and the B8 band includes 880MHz to 960MHz. It can be understood that the longitudinal size (length) and transverse size (width) of the electronic device are usually about 155mm×75mm. Therefore, for the low frequency band, the longitudinal size of the electronic device is close to 1 / 4 wavelength of the low frequency band. When the first radiation branch 100 and the second radiation branch 200 work in the quarter wavelength mode, the longitudinal current of the whole machine can be fully stimulated, thereby effectively improving the radiation efficiency of the electronic device.

[0045] Continue to refer Figure 1 In one embodiment, the first radiation branch 100 further has a first ground terminal G1 and a first free end Z1, the first ground terminal G1 is connected to the ground plate 300 to provide a return path for the first radiation branch 100, and the first feeding point F1 is arranged between the first ground terminal G1 and the first free end Z1. The second radiation branch 200 further has a second ground terminal G2 and a second free end Z2, the second ground terminal G2 is connected to the ground plate 300 to provide a return path for the second radiation branch 200, and the second feeding point F2 is arranged between the second ground terminal G2 and the second free end Z2. That is, the first radiation branch 100 and the second radiation branch 200 can be an inverted-F antenna (IFA), and the inverted-F antenna can adjust its impedance matching by changing its structural parameters, and the adjustable structural parameters include but are not limited to the width and position of the short-circuit metal sheet. For ease of explanation, each embodiment of the present application is described using the first radiating branch 100 and the second radiating branch 200 as an inverted F antenna as an example, but it can be understood that the first radiating branch 100 and the second radiating branch 200 can also adopt other antenna structures, which are not limited here.

[0046] In one embodiment, the first radiation branch 100 and the second radiation branch 200 are at least partially located on two opposite sides of the ground plate 300 in the second direction. Figure 1, the first radiation branch 100 is partially located on one side of the ground plate 300 in the second direction, and the second radiation branch 200 is entirely located on the other side of the ground plate 300 in the second direction. In some embodiments, the first radiation branch 100 and the second radiation branch 200 may be partially located on two opposite sides of the ground plate 300 in the second direction, or the first radiation branch 100 and the second radiation branch 200 may be entirely located on two opposite sides of the ground plate 300 in the second direction, which is not limited here. Based on the above-mentioned setting, the direction of the transverse current generated by the coupling of the first radiation branch 100 and the ground plate 300 is opposite to the direction of the transverse current generated by the coupling of the first radiation branch 100 and the ground plate 300. For example, taking the case where the first radiation branch 100 is disposed on the side of the ground plate 300 close to the first side frame of the electronic device, and the second radiation branch 200 is disposed on the side of the ground plate 300 close to the second side frame of the electronic device, the direction of the transverse current generated by the coupling of the first radiation branch 100 and the ground plate 300 is from the second side frame to the first side frame, and the direction of the transverse current generated by the coupling of the second radiation branch 200 and the ground plate 300 is from the first side frame to the second side frame. In the case where the directions of the transverse currents generated by the coupling of different radiation branches are opposite, part of the transverse currents on the ground plate 300 will cancel each other out, thereby reducing the proportion of the transverse current in the floor current, that is, increasing the proportion of the longitudinal current in the floor current, thereby improving the radio frequency performance of the electronic device. Furthermore, the amplitudes of the longitudinal currents on the first radiation branch 100 and the second radiation branch 200 are the same or similar, so that the distribution of the longitudinal current on the side of the ground plate 300 close to the first radiation branch 100 and the longitudinal current on the side close to the second radiation branch 200 are similar, thereby reducing the distortion of the radiation pattern and enabling the electronic device to have better radiation performance.

[0047] In one embodiment, the ground plate 300 further has a short side 320 extending along the second direction, and the two ends of the short side 320 are respectively connected to the first long side and the second long side of the ground plate 300. The first feeding point F1 and the first grounding terminal G1 of the first radiating branch 100 are arranged close to the short side 320, and the first free end Z1 of the first radiating branch 100 is arranged close to the first long side 310. The second feeding point F2, the second grounding terminal G2 and the second free end Z2 of the second radiating branch 200 are all arranged close to the second long side 310, and the second grounding terminal G2 is arranged close to the short side 320. The first feeding point F1 and the second feeding point F2 are connected via a first connecting line 410, the first connecting line 410 is provided with a connecting node A, and the feed source S1 is connected to the connecting node A via a second connecting line 420.

[0048] In the related art, due to the influence of the position of the speaker near the bottom frame of the electronic device, the radiating branch arranged at the bottom frame of the electronic device or arranged near the bottom frame of the electronic device cannot be directly connected to the feed source S1 for power supply, but it is necessary to add a small board near the bottom frame of the electronic device to realize the transmission of the feeding signal through the switching of the small board. However, the small board not only takes up space in the electronic device, but also leads to an increase in the overall cost of the electronic device. In the embodiment of the application, the first feeding point F1 of the first radiating branch 100 is first connected to the second feeding point F2 of the second radiating branch 200 through the first connecting line 410, and then the feed source S1 is connected to the connection node A through the second connecting line 420. Even if the first feeding point F1 of the first radiating branch 100 is set at the bottom frame, the feeding signal can be transmitted to the first feeding point F1 without setting a small board, thereby saving space in the electronic device and reducing the overall cost of the electronic device.

[0049] In one embodiment, the first connecting line 410 is a coaxial line, that is, the first feeding point F1 and the second feeding point F2 are connected by a coaxial line. The coaxial line is composed of an inner conductor and an outer conductor, and a dielectric material is filled between the two. This structure can effectively prevent signal leakage, and is suitable for a closed transmission environment of high-frequency signals. Therefore, the anti-interference ability and insertion loss of the coaxial line are lower than those of the microstrip line. The use of a coaxial line to connect the first feeding point F1 and the second feeding point F2 can reduce the influence of the transmission path on the feeding signal, thereby improving the radiation performance of the electronic device.

[0050] In one embodiment, the first connecting line 410 is a microstrip line, that is, the first feeding point F1 and the second feeding point F2 are connected by a microstrip line. The microstrip line is a planar transmission line, which is mainly composed of a conductor strip attached to a dielectric substrate, one side of which is exposed to the air and the other side is covered with a dielectric material. Therefore, the manufacturing process of the microstrip line is simple and easy to integrate with other circuit elements. In some embodiments, the first feeding point F1 and the second feeding point F2 can also be connected by a circuit board trace, which can be, but is not limited to, a printed circuit board (Printed Circuit Board) trace or a flexible circuit board (Flexible Printed Circuit, FPC) trace.

[0051] Furthermore, the second connecting line is a cable, and accordingly the electronic device also includes a cable connection socket 421, which can also be called a cable connection socket or a cable socket. The cable connection socket 421 is respectively connected to the connection node A and the feed source S1 on the first connecting line 410. During the test process, the cable connection socket 421 can be used to connect the RF test socket to other auxiliary test equipment, or to the RF component or device to be tested, so as to build a complete test environment. It can be understood that by setting the cable connection socket 421 on the first connecting line 410 and connecting to the feed source S1 via the cable connection socket 421 and the cable, the stability and reliability of the connection can be improved.

[0052] Figure 2 This is a second structural diagram of an electronic device according to an embodiment, referring to Figure 2 In one embodiment, the first radiation branch 100 and the second radiation branch 200 are symmetrically arranged about the longitudinal center axis of the ground plate 300. It should be noted that the symmetrical arrangement includes a completely symmetrical arrangement and an approximately symmetrical arrangement, that is, the situation in which the user's naked eye observes that the arrangement is symmetrical also belongs to the symmetry referred to herein in this application. When the first radiation branch 100 and the second radiation branch 200 are symmetrically arranged, the first radiation branch 100 and the second radiation branch 200 have the same electrical length and connection relationship. Therefore, the first radiation branch 100 and the second radiation branch 200 can excite longitudinal currents of almost equal amplitude and in the same direction, thereby maximizing the RF performance and bandwidth of the electronic device.

[0053] In order to better illustrate the influence of the excitation current on the first radiation branch 100 and the second radiation branch 200 on the radiation performance, Figure 1 The arrangement of the first radiation branch 100 and the second radiation branch 200 is taken as an example to provide current distribution and direction diagrams when the electronic device operates in three different low-frequency bands. Figure 3 This is a current distribution diagram of an electronic device according to an embodiment when it operates at 720 MHz. Figure 4 The antenna directional diagram of an electronic device according to an embodiment when operating at 720 MHz is shown in FIG. Figure 3 and Figure 4When the electronic device operates at 720MHz, the excitation currents on the first radiation branch 100 and the second radiation branch 200 are in the same direction, both pointing from the top frame to the bottom frame. Moreover, the excitation currents on the first radiation branch 100 and the second radiation branch 200 have similar amplitudes. Correspondingly, the direction of the longitudinal component (i.e., longitudinal current) in the floor current on the grounding plate 300 points from the bottom frame to the top frame, and the longitudinal component in the floor current is significantly greater than the transverse component. The field strengths in the X and Y directions on the directional diagram are significantly different, indicating that after the two radiation branches are excited by the same direction and similar amplitude excitation currents on the grounding plate 300, the directivity of the electronic device and the field strength in the required direction have a better enhancement effect. Figure 5 This is a current distribution diagram of an electronic device according to an embodiment when it operates at 940 MHz. Figure 6 The antenna directional diagram of an electronic device according to an embodiment when operating at 940 MHz is shown in FIG. Figure 5 and Figure 6 When the electronic device operates at 940MHz, the excitation currents on the first radiation branch 100 and the second radiation branch 200 are in the same direction, both pointing from the bottom frame to the top frame. Moreover, the excitation currents on the first radiation branch 100 and the second radiation branch 200 have similar amplitudes. Correspondingly, the direction of the longitudinal component (i.e., longitudinal current) in the floor current on the grounding plate 300 is from the top frame to the bottom frame, and the longitudinal component in the floor current is significantly greater than the transverse component. The field strengths in the X and Y directions on the directional diagram are significantly different, indicating that after the two radiation branches are excited by the same direction and similar amplitude excitation currents on the grounding plate 300, the directionality of the electronic device and the field strength in the required direction have a better enhancement effect. Figure 7 This is a current distribution diagram of an electronic device according to an embodiment when it operates at 810 MHz. Figure 8 The antenna directional diagram of an electronic device according to an embodiment when operating at 810 MHz is shown in FIG. Figure 7 and Figure 8 When the electronic device operates at 810MHz, the excitation currents on the first radiation branch 100 and the second radiation branch 200 are in the same direction, both pointing from the top frame to the bottom frame. However, the current amplitudes on the two radiation branches differ greatly, and the current amplitude on the first radiation branch 100 on the left is significantly weaker than the current amplitude on the second radiation branch 200 on the right. Correspondingly, the direction of the longitudinal component (i.e., longitudinal current) in the floor current on the left side of the grounding plate 300 is from the top frame to the bottom frame, while the direction of the longitudinal component (i.e., longitudinal current) in the floor current on the right side of the grounding plate 300 is from the bottom frame to the top frame. The difference in field strength in the X and Y directions on the directional diagram is small, indicating that after the two radiation branches excite the grounding plate 300 with excitation currents in the same direction but with a large difference in amplitude, the directionality of the electronic device is improved little.

[0054] Fig. 9 The data graph of the S11 parameter of an electronic device of an embodiment, wherein S11 is called the input reflection coefficient, which refers to the proportional relationship between the incident wave and the reflected wave. S11 reflects how much incident energy is reflected back by the load, and is usually used to measure the input matching of antennas, RF devices, etc. That is, the lower the value of S11, the less reflection and the better the input matching. Reference Fig. 9 ,based on Figure 8 and Figure 2 By setting the radiation branches, when the longitudinal components of the current on the first radiation branch 100 and the second radiation branch 200 are in the same direction and have similar amplitudes, the electronic device can well cover the entire low-frequency band from 700MHz to 960MHz. Moreover, the S11 parameters of the electronic device at each key frequency point have good performance, for example, the S11 at 703MHz is -4.94dB, the S11 at 803MHz is -7.96dB, the S11 at 802MHz is -10.52dB, the S11 at 896MHz is -3.93dB, the S11 at 880MHz is -3.59dB, and the S11 at 960MHz is -5.14dB. Fig.10 This is an efficiency data diagram of an electronic device according to an embodiment, where efficiency refers to system radiation efficiency (System Radiation System). Fig.10 , when the longitudinal components of the current on the first radiation branch 100 and the second radiation branch 200 are in the same direction and have similar amplitudes, the electronic device can well cover the entire low-frequency band from 700MHz to 960MHz. Moreover, the efficiency of the electronic device at each key frequency point has good performance, for example, the efficiency at 703MHz is -5.65dB, the efficiency at 788MHz is -6.19dB, the efficiency at 824MHz is -6.77dB, the efficiency at 896MHz is -6.25dB, and the efficiency at 960MHz is -8.01dB.

[0055] Fig.11 is a comparison diagram of the efficiency of an electronic device of an embodiment in the case of no shielding and one right hand, Fig.12 is a comparison diagram of the efficiency of an electronic device of an embodiment in the case of no obstruction and one left hand, Fig.13 is a comparison diagram of the efficiency of an electronic device of an embodiment in the case of no obstruction and right head and hand, Fig.14 is a comparison diagram of the efficiency of an electronic device of an embodiment in the case of no obstruction and left head and hand, Fig.15 : is an efficiency comparison diagram of an electronic device of an embodiment when there is no obstruction and the screen is held horizontally with both hands with the USB port facing right. Fig.16This is a comparison diagram of the efficiency of an electronic device of an embodiment when there is no obstruction and the USB port is facing left when the screen is held horizontally with both hands, combined with reference Figures 11 to 16 The electronic device of this embodiment has good performance in the use scenarios of single-handed, head-handed and horizontal screen two-handed holding. Specifically, compared with the average in-band drop in the case of occlusion and no occlusion, the average drop in the band when the right hand is in the band is 1.41dB, the average drop in the band when the left hand is in the band is 0.97dB, the average drop in the band when the right head hand is in the band is 3.55dB, the average drop in the band when the left head hand is in the band is 3.58dB, the average drop in the band when the USB interface is facing the right when the screen is held with both hands in the horizontal screen, and the average drop in the band when the USB interface is facing the left is 1.83dB.

[0056] In one embodiment, the electronic device includes an impedance matching circuit. The impedance matching circuit can be connected to any radiating branch to adjust the matching degree between the output impedance of the feed source S1 and the input impedance of the radiating branch. The impedance matching circuit can be connected to the feeding point or the grounding end of the radiating branch, for example, which is not limited here. Specifically, the impedance matching circuit can be composed of a switch control circuit, an adjustable capacitor, an adjustable inductor, etc. In an exemplary manner, the impedance matching circuit may include a plurality of matching units and a switch unit. Among them, the switch unit has a fixed end and a plurality of selection ends. The fixed end of the switch unit is connected to the feeding point of the radiating branch, and the selection end of the switch unit is respectively connected to each matching unit. The switch unit is used to select and conduct the signal transmission path between any selection end and the fixed end to perform different impedance matching for different frequency bands. In addition, the switch unit may have some selection ends that are not connected to the matching unit to perform more flexible impedance matching adjustment. For example, the switch unit may have a selection end directly connected to the first radiating branch 100 so that the resistance between the selection end and the ground is 0Ω. The switch unit may also have another selection terminal suspended so that the resistance between the selection terminal and the ground is between 0Ω and high impedance. It is understandable that the above impedance matching circuit is only used for exemplary description and may also be implemented by other circuits, which is not limited in this embodiment.

[0057] Fig.17 This is a third structural diagram of an electronic device according to an embodiment, referring to Fig.17 In one embodiment, the feed source S1 is used to provide feed signals of a first frequency band and a second frequency band respectively, and the first frequency band and the second frequency band are different. For example, the second frequency band can be a medium-high frequency band, that is, the second frequency band covers 1450MHz to 2690MHz. The electronic device also includes a third radiation branch 500 and a combiner 600.

[0058] Among them, the third radiating branch 500 has a third feeding point F3. The first end of the combiner 600 is connected to the feed source S1, a second end of the combiner 600 is respectively connected to the first feeding point F1 and the second feeding point F2, and the other second end of the combiner 600 is connected to the third feeding point F3. The combiner 600 is used to transmit the feeding signal of the first frequency band from the feed source to the first radiating branch 100 and the second radiating branch 200, and transmit the feeding signal of the second frequency band to the third radiating branch 500, so that the third radiating branch 500 and the grounding plate 300 jointly support the second frequency band. Specifically, through the transmission path of signals of different frequency bands connected by the combiner 600, the feeding signals of different frequency bands from the feed source S1 can be fed into different radiating branches respectively, and the electronic device can radiate signals of different frequency bands by adjusting the impedance matching of each radiating branch.

[0059] Taking the first radiation branch 100 and the second radiation branch 200 for radiating low-frequency signals and the third radiation branch 500 for radiating medium- and high-frequency signals as an example, if the feed signal from the feed source S1 includes a low-frequency signal, then after passing through the combiner 600, the feed signal will be fed into the first feed point F1 of the first radiation branch 100 and the second feed point F2 of the second radiation branch 200, so that the electronic device operates in the low-frequency band. If the feed signal from the feed source S1 includes medium- and high-frequency signals, then after passing through the combiner 600, the feed signal will be fed into the third feed point F3 of the third radiation branch 500, so that the electronic device operates in the medium- and high-frequency bands. If the feeding signal from the feed source S1 includes both a low-frequency signal and a medium-high frequency signal, the low-frequency part of the above feeding signal will be fed into the first feeding point F1 of the first radiating branch 100 and the second feeding point F2 of the second radiating branch 200, and the high-frequency part of the above feeding signal will be fed into the third feeding point F3 of the third radiating branch 500, so that the electronic device can operate in the low-frequency band and the medium-high frequency band at the same time.

[0060] In the embodiment of the application, by shunting the feed signal from the feed source S1, the electronic device can work in different frequency bands at the same time. Moreover, by adopting the technical solution of the combiner 600, there is no need to set a radio frequency switch to switch the feed path, thereby reducing the number of connection lines between the feed source S1 and each radiation branch, and effectively simplifying the control logic of the communication process. In some embodiments, a lapped filter can also be used to replace the combiner 600 to shunt the feed signal. The specific working method is similar to the combiner 600 solution, which will not be repeated here.

[0061] It is understandable that, in some embodiments, the third radiation branch 500 may also be connected to another feed source other than the feed source S1. That is, the first radiation branch 100 and the second radiation branch 200 are connected to the feed source S1, and the third radiation branch 500 is connected to the feed source S2, so that the third radiation branch 500 and the other radiation branches work independently of each other, which is not limited here.

[0062] In one embodiment, the third radiation branch 500 includes a first radiation section 510 and a second radiation section 520 which are arranged at intervals, the first radiation section 510 is arranged close to the first radiation branch 100, and the second radiation section 520 is arranged close to the second radiation branch 200. The first radiation section 510 is provided with a third ground terminal G3 and a third free terminal Z3, and the third ground terminal G3 is connected to the ground plate 300 to provide a return path for the first radiation section 510. The second radiation section 520 is provided with a third feeding point F3 and a fourth ground terminal G4, and the fourth ground terminal G4 is connected to the ground plate 300 to provide a return path for the second radiation section 520. Specifically, the first radiation section 510 can be coupled with the second radiation section 520 through a gap, so that the first radiation section 510 and the second radiation section 520 can radiate signals together under the excitation of the feeding signal. Among them, the third free end Z3 of the third radiation branch node 500 can be connected to a tuning circuit to adjust the electrical length of the third radiation branch node 500 so that the frequency band of the radiation signal of the third radiation branch node 500 is different from that of the first radiation branch node 100 and the second radiation branch node 200. Specifically, when the electrical length of the third radiation branch node 500 does not match the electrical length required for the second frequency band, the tuning circuit can adjust the equivalent electrical length of the third radiation branch node 500 to match the electrical length required to support the second frequency band, so that the third radiation branch node 500 can support the second frequency band. It can be understood that in other embodiments, when the electrical length of the third radiation branch node 500 matches the electrical length required to support the second frequency band, the tuning circuit may not be set. The tuning circuit may include a resistor, an inductor and a capacitor, and the specific structure of the tuning circuit may be determined according to the electrical length of the third radiation branch node 500 and the second frequency band, which is not limited here.

[0063] In the embodiment of the application, the signal frequency band supported by the electronic device can be further expanded by introducing the third radiating branch 500. Moreover, since the third feeding point F3 of the third radiating branch 500 is also fed by the same feed source S1 as the first feeding point F1 and the second feeding point F2, and the second connecting line 420 is reused to connect to the above feed source S1, the number of signal lines used to transmit the feeding signal in the electronic device can be saved, and the space occupied in the electronic device can be reduced, which is conducive to the miniaturization of the electronic device.

[0064] In one of the embodiments, the third ground terminal G3 of the first radiation segment 510 is connected to the first ground terminal G1 of the first radiation branch 100, and the fourth ground terminal G4 of the second radiation segment 520 is connected to the second ground terminal G2 of the second radiation branch 200. That is, the first radiation segment 510 and the first radiation branch 100 are used as an integral radiation structure, and the first ground terminal G1 of the first radiation branch 100 and the third ground terminal G3 of the first radiation segment 510 are reused and connected back to the ground. Similarly, the second radiation segment 520 and the second radiation branch 200 are used as another integral radiation structure, and the second ground terminal G2 of the second radiation branch 200 and the fourth ground terminal G4 of the second radiation segment 520 are reused and connected back to the ground. In the embodiment of the application, through the above-mentioned setting method, the structure of the radiation branch in the electronic device can be further simplified while ensuring the radiation performance, thereby reducing the design difficulty and manufacturing difficulty.

[0065] It can be understood that, in some embodiments, the third ground terminal G3 of the first radiation segment 510 can be connected to the first ground terminal G1 of the first radiation branch 100, and the fourth ground terminal G4 of the second radiation segment 520 can be disconnected from the second ground terminal G2 of the second radiation branch 200. In other embodiments, the third ground terminal G3 of the first radiation segment 510 can be disconnected from the first ground terminal G1 of the first radiation branch 100, and the fourth ground terminal G4 of the second radiation segment 520 can be connected to the second ground terminal G2 of the second radiation branch 200, which will not be repeated here.

[0066] Fig.18 FIG. 4 is a schematic diagram of the structure of an electronic device according to an embodiment of the present invention. Fig.18 In one embodiment, the electronic device further includes a fourth radiation branch 700, the fourth radiation branch 700 includes a fifth ground terminal G5 and a fourth free terminal Z4, the fifth ground terminal G5 is connected to the ground plate 300 to provide a ground return path for the fourth radiation branch 700. The fourth free terminal Z4 is arranged close to the first free terminal Z1 of the first radiation branch 100. The fourth radiation branch 700 can be coupled with the fourth radiation branch 700 through the gap, thereby further improving the radio frequency performance and bandwidth of the electronic device.

[0067] Fig.19The figure is an internal structure diagram of an electronic device of an embodiment. The electronic device includes a processor, a memory, a communication interface, a display screen and an input device connected through a system bus. Among them, the processor of the electronic device is used to provide computing and control capabilities. The memory of the electronic device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the electronic device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be realized through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. The display screen of the electronic device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the electronic device can be a touch layer covered on the display screen, or a key, trackball or touchpad set on the housing of the electronic device, or an external keyboard, touchpad or mouse, etc.

[0068] Those skilled in the art will understand that Fig.19 The structure shown in the figure is merely a block diagram of a partial structure related to the scheme of the present application, and does not constitute a limitation on the electronic device to which the scheme of the present application is applied. The specific electronic device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0069] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The above embodiments only express several implementation methods of the embodiments of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the embodiments of the present application, and these all belong to the protection scope of the embodiments of the present application. Therefore, the protection scope of the patent of the embodiments of the present application shall be subject to the attached claims.

Claims

1. An electronic device, characterized in that: include: A feed source, used for providing a feed signal; A ground plate having a long side extending along a first direction; A first radiation branch having a first feeding point connected to the feed source; A second radiation branch node has a second feeding point connected to the feed source, and the first radiation branch node and the second radiation branch node respectively extend at least partially along the first direction; Among them, the first radiation branch and the second radiation branch are used to simultaneously generate excitation currents with the same direction under the excitation of the feeding signal, and are coupled with the grounding plate to excite the longitudinal current on the grounding plate parallel to the first direction, so that the first radiation branch, the second radiation branch and the grounding plate jointly support the first frequency band.

2. The electronic device according to claim 1, characterized in that: The first radiation branch and the second radiation branch are respectively at least partially located on two opposite sides of the ground plate in the second direction, so that the transverse current generated by the coupling between the ground plate and the first radiation branch and the second radiation branch is less than the longitudinal current; The second direction is perpendicular to the first direction, and the transverse current is parallel to the second direction.

3. The electronic device according to claim 1, characterized in that: The first frequency band includes 700 MHz to 960 MHz.

4. The electronic device according to any one of claims 1 to 3, characterized in that: The first radiation branch further has a first grounding end and a first free end, the first grounding end is connected to the ground plate, and the first feeding point is arranged between the first grounding end and the first free end; and / or The second radiation branch also has a second grounding end and a second free end, the second grounding end is connected to the ground plate, and the second feeding point is arranged between the second grounding end and the second free end.

5. The electronic device according to claim 4, characterized in that: The first radiation branch and the second radiation branch are symmetrically arranged about a longitudinal center axis of the ground plate, and the longitudinal center axis is parallel to the first direction.

6. The electronic device according to claim 4, characterized in that: The ground plate further has a short side extending along the second direction, and two ends of the short side are respectively connected to the first long side and the second long side of the ground plate; The first feeding point and the first grounding end of the first radiation branch are arranged close to the short side, and the first free end of the first radiation branch is arranged close to the first long side; The second feeding point, the second grounding end and the second free end of the second radiation branch are all arranged close to the second long side, and the second grounding end is arranged close to the short side.

7. The electronic device according to any one of claims 1 to 3, characterized in that: The first feeding point and the second feeding point are connected via a first connecting line, the first connecting line is provided with a connecting node, and the feed source is connected to the connecting node via a second connecting line; Wherein, the first connecting line is a coaxial line or a microstrip line.

8. The electronic device according to any one of claims 1 to 3, characterized in that: The feed source is used to provide feed signals of a first frequency band and a second frequency band respectively, the first frequency band and the second frequency band are different, and the electronic device further includes: A third radiation branch having a third feeding point; A combiner, wherein a first end of the combiner is connected to the feed source, a second end of the combiner is respectively connected to the first feeding point and the second feeding point, and another second end of the combiner is connected to the third feeding point. The combiner is used to transmit the feed signal of the first frequency band from the feed source to the first radiating branch and the second radiating branch, and transmit the feed signal of the second frequency band to the third radiating branch, so that the third radiating branch and the ground plane jointly support the second frequency band.

9. The electronic device according to claim 8, characterized in that: The third radiation branch node includes a first radiation segment and a second radiation segment which are spaced apart from each other, wherein the first radiation segment is disposed close to the first radiation branch node, and the second radiation segment is disposed close to the second radiation branch node; The first radiating section is provided with a third grounding end and a third free end, the second radiating section is provided with a third feeding point and a fourth grounding end, and the third feeding point is arranged adjacent to the third free end.

10. The electronic device according to claim 9, characterized in that: The third grounding end of the first radiation segment is connected to the first grounding end of the first radiation branch, and the fourth grounding end of the second radiation segment is connected to the second grounding end of the second radiation branch.

11. The electronic device according to claim 8, characterized in that: The second frequency band includes 1450 MHz to 2690 MHz.

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