Antenna structure and electronic device having the same

Abstract

The present invention provides an antenna structure of an electronic device, including a frame, a back plate, a third feeding point and a fourth feeding point. The frame is provided with at least a first slit and a third slit. The first slit and the third slit together divide a third radiating part and a fourth radiating part from the frame. The third feeding point is arranged on the third radiating part and is electrically connected to a third feeding point to feed a current signal to the third radiating part. The fourth feeding point is arranged on the fourth radiating part and is electrically connected to a fourth feeding point to feed a current signal to the fourth radiating part. When the third feeding point and the fourth feeding point are respectively fed with current, the third radiating part and the fourth radiating part generate at least one identical radiation frequency band. The antenna structure has a broadband effect and can have MIMO function. The present invention also provides an electronic device having the antenna structure.

Description

Technical Field

[0001] The invention relates to an antenna structure and an electronic device having the antenna structure. Background Art

[0002] With the advancement of wireless communication technology, electronic devices such as mobile phones and personal digital assistants are constantly developing towards diversified functions, thinner and lighter, and faster and more efficient data transmission. However, the space available for accommodating antennas is getting smaller and smaller, and with the continuous development of wireless communication technology, the bandwidth requirements for antennas are increasing. Therefore, how to design an antenna with a wider bandwidth in a limited space is an important issue facing antenna design. Summary of the invention

[0003] In view of this, it is necessary to provide an antenna structure and an electronic device having the antenna structure to solve the above problems.

[0004] An antenna structure of an electronic device, characterized in that the antenna structure comprises a frame, a back plate, a third feeding point and a fourth feeding point, the frame is at least partially made of a metal material, at least a first slit and a third slit are provided on the frame, the frame is arranged at the edge of the back plate, the back plate is further provided with a slot at an edge close to the frame, the first slit and the second slit are connected to the slot, the first slit and the third slit jointly divide a third radiating portion and a fourth radiating portion from the frame, and the third feeding point is arranged at the third radiating portion. The third radiating part is on the radiating part and is electrically connected to a third feeding point to feed a current signal into the third radiating part. The fourth feeding point is arranged on the fourth radiating part and is electrically connected to a fourth feeding point to feed a current signal into the fourth radiating part. When the third feeding point and the fourth feeding point are respectively fed with current, the third radiating part and the fourth radiating part generate at least one identical radiation frequency band, wherein when the current is fed from the third feeding point, the third radiating part excites LTE-A low, medium, and high frequency modes, super medium frequency mode, ultra high frequency mode and 5G N78 / N79 mode; when the current is fed from the fourth feeding point, the fourth radiating part excites medium, high frequency modes, ultra high frequency mode and 5G N78 / N79 mode.

[0005] An electronic device comprises the antenna structure mentioned above.

[0006] The above antenna structure and the electronic device having the antenna structure form the first radiation part and the second radiation part by setting the first gap and the second gap. The first radiation part and the second radiation part can generate at least one same radiation frequency band to meet the MIMO characteristics and have a broadband effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of the antenna structure according to the first preferred embodiment of the present invention being applied to an electronic device.

[0008] Figure 2 for Figure 1 A schematic diagram of the electronic device shown at another angle.

[0009] Figure 3 For along Figure 1 Schematic diagram of a cross section along line III-III in the electronic device shown.

[0010] Figure 4 for Figure 1 Circuit diagram of the antenna structure shown.

[0011] FIG. 5A to FIG. 5D for Figure 4 Circuit diagram of the switching circuit in the antenna structure shown.

[0012] Figure 6 for Figure 4 Schematic diagram of current flow when the antenna structure is working.

[0013] Figure 7 for Figure 4 S-parameter (scattering parameter) curve of the antenna structure shown.

[0014] Figure 8 for Figure 4 Plot of the total radiation efficiency of the antenna structure shown.

[0015] Fig. 9 FIG. 4 is a schematic diagram of an antenna structure according to a second preferred embodiment of the present invention.

[0016] Fig.10 for Fig. 9 Schematic diagram of current flow when the antenna structure is working.

[0017] Fig.11 for Fig. 9 S-parameter (scattering parameter) curve of the antenna structure shown.

[0018] Fig.12 for Fig. 9 Plot of the total radiation efficiency of the antenna structure shown.

[0019] Main component symbols

[0020]

[0021]

[0022]

[0023] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be noted that when an element is referred to as being "electrically connected" to another element, it may be directly on the other element or there may be an element in the middle. When an element is considered to be "electrically connected" to another element, it may be a contact connection, for example, a wire connection, or a contactless connection, for example, a contactless coupling.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0027] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0028] See also Figure 1 and Figure 2 A preferred embodiment of the present invention provides an antenna structure 100, which can be applied to electronic devices 200 such as mobile phones, tablet computers, personal digital assistants (PDAs), etc., for transmitting and receiving radio waves to transmit and exchange wireless signals.

[0029] It can be understood that the electronic device 200 can adopt one or more of the following communication technologies: Bluetooth (BT) communication technology, global positioning system (GPS) communication technology, wireless fidelity (Wi-Fi) communication technology, global system for mobile communications (GSM) communication technology, wideband code division multiple access (WCDMA) communication technology, long term evolution (LTE) communication technology, 5G communication technology, SUB-6G communication technology and other future communication technologies.

[0030] Please also read Figure 3 The electronic device 200 includes a housing 11 and a display unit 201. The housing 11 at least includes a frame 110, a back plate 111, a system ground plane 112 and a middle frame 113.

[0031] The frame 110 is generally annular and is made of metal or other conductive materials. The back plate 111 is disposed at the edge of the frame 110. The back plate 111 can be made of metal or other conductive materials. Of course, the back plate 111 can also be made of insulating materials, such as glass, plastic, ceramics, etc.

[0032] It can be understood that in this embodiment, the frame 110 is provided with an opening (not shown) on one side relative to the back plate 111 for accommodating the display unit 201. The display unit 201 has a display plane, which is exposed in the opening. It can be understood that the display unit 201 can be combined with a touch sensor to form a touch screen. The touch sensor can also be called a touch panel or a touch-sensitive panel.

[0033] It can be understood that in this embodiment, the display unit 201 has a high screen-to-body ratio. That is, the display plane area of ​​the display unit 201 is greater than 70% of the front area of ​​the electronic device, and can even be a full screen on the front. Specifically, in this embodiment, the full screen means that except for the necessary slots opened on the antenna structure 100, the left side, right side, and bottom side of the display unit 201 can be seamlessly connected to the frame 110.

[0034] The system ground plane 112 may be made of metal or other conductive materials. The system ground plane 112 is connected to the frame 110 to provide grounding for the antenna structure 100 .

[0035] The middle frame 113 is roughly in the shape of a rectangular sheet and is made of metal or other conductive materials. The shape and size of the middle frame 113 are slightly smaller than the system ground plane 112. The middle frame 113 is superimposed on the system ground plane 112. It can be understood that in this embodiment, the edge of the middle frame 113 is spaced apart from the frame 110, thereby forming a corresponding clearance area 114 between the two. It can be understood that in this embodiment, the distance between the frame 110 and the middle frame 113 can be adjusted according to needs. For example, the distance between the frame 110 and the middle frame 113 at different positions can be equidistant or unequal.

[0036] It can be understood that in this embodiment, the frame 110, the back plate 111, the system ground plane 112 and the middle frame 113 can form an integrally formed metal frame. In this embodiment, the middle frame 113 is a metal sheet disposed between the display unit 201 and the system ground plane 112. The middle frame 113 is used to support the display unit 201, provide electromagnetic shielding, and improve the mechanical strength of the electronic device 200.

[0037] It can be understood that in other embodiments, the electronic device 200 may also include one or more of the following components, such as a processor, a circuit board, a memory, a power supply component, an input and output circuit, an audio component (such as a microphone and a speaker, etc.), a multimedia component (such as a front camera and / or a rear camera), a sensor component (such as a proximity sensor, a distance sensor, an ambient light sensor, an acceleration sensor, a gyroscope, a magnetic sensor, a pressure sensor and / or a temperature sensor, etc.), etc., which are not elaborated here.

[0038] Please also read Figure 4 The antenna structure 100 at least includes a frame, a first feeding point 12, a second feeding point 13, a first grounding point 14, a third feeding point 15, a fourth feeding point 16, a second grounding point 17 and a switching point 18.

[0039] The frame is at least partially made of metal material. In the present embodiment, the frame is the frame 110 of the electronic device 200. The frame 110 includes at least a first part 115, a second part 116 and a third part 117. In the present embodiment, the first part 115 is the top of the electronic device 200, that is, the first part 115 is the top metal frame of the electronic device 200, and the antenna structure 100 constitutes the upper antenna of the electronic device 200. The second part 116 and the third part 117 are arranged opposite to each other, and both are arranged at the two ends of the first part 115, preferably vertically. In the present embodiment, the length of the second part 116 or the third part 117 is greater than the length of the first part 115. That is, the second part 116 and the third part 117 are both the side metal frames of the electronic device 200.

[0040] At least one slit is also provided on the frame 110. In this embodiment, three slits are provided on the frame 110, namely, a first slit 120, a second slit 121 and a third slit 122. The first slit 120 is provided on the first portion 115. The second slit 121 is provided on the second portion 116. The third slit 122 is provided on the third portion 117. The third slit 122 is symmetrically provided with the second slit 121 and is further away from the first slit 120 than the second slit 121.

[0041] In this embodiment, the first slit 120, the second slit 121, and the third slit 122 all penetrate and partition the frame 110. The at least one slit together divides at least four radiation parts from the frame 110. In this embodiment, the first slit 120, the second slit 121, and the third slit 122 together divide the frame 110 into a first radiation part F1, a second radiation part F2, a third radiation part F3, and a fourth radiation part F4. In this embodiment, the frame 110 between the first slit 120 and the second slit 121 forms the first radiation part F1. The part of the frame 110 where the second slit 121 is away from the first slit 120 and the first radiation part F1 forms the second radiation part F2. The frame 110 between the first slit 120 and the third slit 122 constitutes the third radiation part F3. The part of the frame 110 where the third slit 122 is away from the first slit 120 and the third radiation part F3 constitutes the fourth radiation part F4.

[0042] That is, the first radiation portion F1 is arranged at a corner of the electronic device 200, that is, it is composed of part of the first portion 115 and part of the second portion 116. The two ends of the first radiation portion F1 are respectively connected to the first slot 120 and the second slot 121. The second radiation portion F2 is arranged at the left side of the electronic device 200, that is, it is composed of part of the second portion 116. One end of the second radiation portion F2 is connected to the second slot 121, and the other end is connected to the back plate 111 and the system ground plane 112. The electrical length of the first radiation portion F1 is greater than the electrical length of the second radiation portion F2. The third radiation portion F3 is composed of part of the first portion 115 and part of the third portion 117. The two ends of the third radiation portion F3 are respectively connected to the first slot 120 and the third slot 122. The fourth radiation portion F4 is arranged at the right side of the electronic device 200, and is composed of part of the third portion 117. One end of the fourth radiation portion F4 is connected to the third slot 122, and the other end is connected to the back plate 111 and the system ground plane 112. The electrical length of the third radiation portion F3 is greater than the electrical length of the first radiation portion F1.

[0043] Understandable, please refer to Figure 2 In this embodiment, a slot 123 is further provided at the edge of the back plate 111 close to the frame 110. The slot 123 is generally U-shaped, which is provided on one side of the back plate 111 close to the first portion 115, and extends toward the second portion 116 and the third portion 117, respectively, and is connected to the first slit 120, the second slit 121, and the third slit 122.

[0044] It can be understood that in this embodiment, the first gap 120, the second gap 121, the third gap 122 and the slot 123 are all filled with insulating materials, such as plastic, rubber, glass, wood, ceramic, etc., but not limited thereto.

[0045] It can be understood that in this embodiment, when the widths of the first slot 120, the second slot 121, and the third slot 122 are less than 2 millimeters (mm), the efficiency of the antenna structure 100 will be affected. Therefore, the widths of the second slot 121 and the third slot 122 are usually not less than 2 mm. Therefore, in this embodiment, considering the overall aesthetic appearance of the electronic device 200 and the radiation efficiency of the antenna structure 100, the widths of the first slot 120, the second slot 121, and the third slot 122 can all be set to 2 mm.

[0046] It can be understood that in this embodiment, the first feeding point 12 is disposed on the first radiation portion F1 and is located at the first portion 115. The first feeding point 12 can be electrically connected to a first feeding point 202 by means of a spring, a microstrip line, a strip line, a coaxial cable, etc., to feed a current signal to the first radiation portion F1.

[0047] The second feeding point 13 is disposed on the second radiation portion F2 and located at the second part 116. The second feeding point 13 can be electrically connected to a second feeding point 203 by means of a spring, a microstrip line, a strip line, a coaxial cable, etc., to feed a current signal to the second radiation portion F2.

[0048] The first grounding point 14 is disposed on the first radiation portion F1 and is located at the second portion 116. One end of the first grounding point 14 can be electrically connected to a first system ground 204 by means of a spring, a microstrip line, a strip line, a coaxial cable, etc., to provide grounding for the first radiation portion F1. In this embodiment, the first grounding point 14 is disposed between the first feeding point 12 and the second feeding point 13, that is, the first feeding point 12 and the second feeding point 13 are located on both sides of the first grounding point 14. Specifically, the first grounding point 14 and the second feeding point 13 are respectively disposed on both sides of the second gap 121, and are disposed adjacent to each other.

[0049] The third feeding point 15 is disposed on the third radiation portion F3 and located at the first portion 115. The third feeding point 15 can be electrically connected to a third feeding point 205 by means of a spring, a microstrip line, a strip line, a coaxial cable, etc., to feed a current signal to the third radiation portion F3.

[0050] The fourth feeding point 16 is disposed on the fourth radiation portion F4 and is located at the third portion 117. In this embodiment, the fourth feeding point 16 is symmetrically disposed with the second feeding point 13, and one end of each is grounded through the system ground plane 112. The fourth feeding point 16 can be electrically connected to a fourth feeding point 206 by means of a spring, a microstrip line, a strip line, a coaxial cable, etc., so as to feed a current signal to the fourth radiation portion F4.

[0051] The second grounding point 17 is arranged on the third radiation part F3 and is located at the third part 117. In this embodiment, the second grounding point 17 is arranged symmetrically with the first grounding point 14. One end of the second grounding point 17 can be electrically connected to a second system ground 207 by means of a spring, a microstrip line, a strip line, a coaxial cable, etc., or electrically connected to the second system ground 207 by means of a middle / high band conditioner (MHC / HHC) (not shown) to provide grounding for the third radiation part F3. The MHC / HHC can be an inductor, a capacitor or a combination thereof.

[0052] In this embodiment, the second grounding point 17 is disposed between the third feeding point 15 and the fourth feeding point 16, that is, the third feeding point 15 and the fourth feeding point 16 are located on both sides of the second grounding point 17. Specifically, the second grounding point 17 and the fourth feeding point 16 are respectively disposed on both sides of the third slot 122, and are disposed adjacent to each other.

[0053] The switching point 18 is disposed on the third radiation portion F3 and is located at the first portion 115. In this embodiment, the switching point 18 is disposed closer to the first slot 120 than the third feeding point 15. In this embodiment, the switching point 18 is also electrically connected to the system ground plane 112, i.e., grounded, through a switching circuit 19.

[0054] It can be understood that in this embodiment, the specific structure of the switching circuit 19 can be in various forms, for example, it can include a single-way switch, a multi-way switch, a single-way switch with a matching element, a multi-way switch with a matching element, etc.

[0055] Please also read Figure 5A In one embodiment, the switching circuit 19 includes a single-way switch 19a. The single-way switch 19a includes a moving contact a1 and a static contact a2. The moving contact a1 is electrically connected to the third radiating portion F3. The static contact a2 of the single-way switch 19a is electrically connected to the system ground plane 112. In this way, by controlling the opening or closing of the single-way switch 19a, the third radiating portion F3 is electrically connected or disconnected from the system ground plane 112, that is, the third radiating portion F3 is controlled to be grounded or not grounded, so as to achieve the function of multi-frequency adjustment.

[0056] Understandable, please refer to Figure 5BIn one embodiment, the switching circuit 19 includes a multi-way switch 19b. In this embodiment, the multi-way switch 19b is a four-way switch. The multi-way switch 19b includes a moving contact b1, a first static contact b2, a second static contact b3, a third static contact b4 and a fourth static contact b5. The moving contact b1 is electrically connected to the third radiating portion F3. The first static contact b2, the second static contact b3, the third static contact b4 and the fourth static contact b5 are electrically connected to different positions of the system ground plane 112, respectively. By controlling the switching of the moving contact b1, the moving contact b1 can be switched to the first static contact b2, the second static contact b3, the third static contact b4 and the fourth static contact b5, respectively. In this way, the third radiating portion F3 will be electrically connected to different positions of the system ground plane 112, respectively, thereby achieving the function of multi-frequency adjustment.

[0057] Understandable, please refer to Figure 5C In one embodiment, the switching circuit 19 includes a single-way switch 19c and a matching element 191. The single-way switch 19c includes a moving contact c1 and a static contact c2. The moving contact c1 is electrically connected to the third radiation portion F3. The static contact c2 is electrically connected to the system ground plane 112 through the matching element 191. The matching element 191 has a preset impedance. The matching element 191 may include an inductor, a capacitor, or a combination of an inductor and a capacitor.

[0058] Please also read Figure 5D In one embodiment, the switching circuit 19 includes a multi-way switch 19d and at least one matching element 193. In this embodiment, the multi-way switch 19d is a four-way switch, and the switching circuit 19 includes three matching elements 193. The multi-way switch 19d includes a moving contact d1, a first static contact d2, a second static contact d3, a third static contact d4, and a fourth static contact d5. The moving contact d1 is electrically connected to the third radiation portion F3. The first static contact d2, the second static contact d3, and the third static contact d4 are electrically connected to the system ground plane 112 through corresponding matching elements 193. The fourth static contact d5 is suspended. Each matching element 193 has a preset impedance, and the preset impedances of these matching elements 193 can be the same or different. Each matching element 193 can include an inductor, a capacitor, or a combination of an inductor and a capacitor. The position where each matching element 193 is electrically connected to the system ground plane 112 can be the same or different.

[0059] It can be understood that by controlling the switching of the moving contact d1, the moving contact d1 can be switched to the first static contact d2, the second static contact d3, the third static contact d4 and the fourth static contact d5 respectively. In this way, the third radiating portion F3 will be electrically connected to the system ground plane 112 or disconnected from the system ground plane 112 through different matching elements 193, thereby achieving the function of multi-frequency adjustment.

[0060] Understandable, please refer to Figure 6 , is a current path diagram of the antenna structure 100. The first radiating portion F1 is a loop antenna. When current is fed from the first feeding point 12, the current will flow through the first radiating portion F1 and flow to the second slot 121 (see path P1), thereby exciting a first working mode to generate a radiation signal of a first radiation frequency band.

[0061] When current is fed in from the second feeding point 13 , the current will also flow through the second radiation portion F2 and flow toward the system ground plane 112 and the middle frame 113 (see path P2 ), thereby exciting a second working mode to generate a radiation signal in a second radiation frequency band.

[0062] It can be understood that in this embodiment, the third radiating portion F3 is a monopole antenna. When current is fed from the third feeding point 15, the current will flow through the third radiating portion F3 and flow to the first slot 120, then flow into the back plate 111, the system ground plane 112 and the middle frame 113, and then flow to the third slot 122, and then flow through the third radiating portion F3 to the third feeding point 15 (see path P3), thereby exciting a third working mode to generate a radiation signal of the third radiation frequency band.

[0063] When current is fed from the third feeding point 15, the current will flow through the third radiation part F3 and flow to the first slot 120 and the third slot 122 (see path P4), respectively, thereby exciting a fourth working mode to generate a radiation signal of a fourth radiation frequency band. When current is fed from the third feeding point 15, the current will flow through the third radiation part F3 and flow to the first slot 120 (see path P5), thereby exciting a fifth working mode to generate a radiation signal of a fifth radiation frequency band. When current is fed from the third feeding point 15, the current will flow through the third radiation part F3 and flow to the third slot 122 (see path P6), thereby exciting a sixth working mode to generate a radiation signal of a sixth radiation frequency band.

[0064] When current is fed from the fourth feeding point 16 , the current will flow through the fourth radiation portion F4 and flow toward the system ground plane 112 and the middle frame 113 (see path P7 ), thereby exciting a seventh working mode to generate a radiation signal of a seventh radiation frequency band.

[0065] In this embodiment, the first working mode includes the Global Positioning System (GPS) mode, the WIFI 2.4GHz mode, the WIFI 5GHz mode and the Licensed-Assisted Access (LAA) mode. The frequencies of the first radiation band include 1575MHz, 2400-2484MHz and 5150-5925MHz. The second working mode includes the WIFI 2.4GHz mode, the WIFI 5GHz mode and the LAA mode. The frequencies of the second radiation band include 2400-2484MHz and 5150-5925MHz. The third working mode is the Long Term Evolution Advanced (LTE-A) low-frequency mode. The frequencies of the third radiation band include 700-960MHz. The fourth working mode includes the ultra-middle frequency (UMB) mode and the medium and high frequency modes of LTE-A. The frequencies of the fourth radiation frequency band include 1427-1518MHz, 1710-2170MHz and 2300-2690MHz. The fifth working mode includes ultra-high frequency (UHB) mode and 5G N78 mode. The frequencies of the fifth radiation frequency band include 3300-3800MHz. The sixth working mode is 5G N79 mode. The frequencies of the sixth radiation frequency band include 4400-5000MHz. The seventh working mode includes LTE-A medium and high frequency modes, UHB mode and 5G N78, N79 mode. The frequencies of the seventh radiation frequency band include 1710-2170MHz, 2300-2690MHz, 3300-3800MHz and 4400-5000MHz.

[0066] Obviously, in this embodiment, the first radiating part F1 constitutes GPS, WIFI 2.4G / 5G, and LAA antennas. The second radiating part F2 constitutes WIFI 2.4G / 5G and LAA antennas. The third radiating part F3 constitutes LTE-A low, medium, high frequency, super medium frequency, ultra high frequency, and 5G N78 / N79 antennas. The fourth radiating part F4 constitutes LTE-A medium, high frequency, super medium frequency, ultra high frequency, and 5GN78 / N79 antennas. In other words, the first radiating part F1 and the second radiating part F2 have at least one common radiation frequency band, and the radiation frequency bands of the two overlap. For example, except for the 1575MHz frequency band, the first radiating part F1 and the second radiating part F2 can both generate radiation frequency bands of 2400-2484MHz and 5150-5925MHz. Similarly, the third radiating part F3 and the fourth radiating part F4 have at least one common radiation frequency band, and the radiation frequency bands of the two overlap. For example, in addition to the 700-960MHz and 1427-1518MHz frequency bands, the third radiating portion F3 and the fourth radiating portion F4 can both generate radiation frequency bands of 1710-2170MHz, 2300-2690MHz, 3300-3800MHz and 4400-5000MHz. In this way, the electronic device 200 can realize a multiple input multiple output (MIMO) function. For example, when the electronic device 200 is provided with a corresponding lower antenna at its bottom, the electronic device 200 can support 4*4MIMO.

[0067] Figure 7 is a graph of S parameters (scattering parameters) of the antenna structure 100. Curve S71 is the S11 value of the third radiation portion F3 when the antenna structure 100 is working. Curve S72 is the S11 value of the first radiation portion F1 when the antenna structure 100 is working. Curve S73 is the S11 value of the second radiation portion F2 when the antenna structure 100 is working. Curve S74 is the S11 value of the fourth radiation portion F4 when the antenna structure 100 is working.

[0068] Figure 8 is a total radiation efficiency curve of the antenna structure 100. Curve S81 is the total radiation efficiency of the third radiation portion F3 when the antenna structure 100 is working. Curve S82 is the total radiation efficiency of the first radiation portion F1 when the antenna structure 100 is working. Curve S83 is the total radiation efficiency of the second radiation portion F2 when the antenna structure 100 is working. Curve S84 is the total radiation efficiency of the fourth radiation portion F4 when the antenna structure 100 is working.

[0069] Obviously, by Figures 7 and 8It can be seen that the antenna structure 100 can form at least four independent radiating parts by setting a plurality of slots, such as a first slot 120, a second slot 121 and a third slot 122. Among them, the first radiating part F1 can excite GPS, Wi-Fi 2.4G, Wi-Fi 5G and LAA modes (covering the frequency range of 1575Hz, 2400-2484MHz and 5150-5925MHz). The second radiating part F2 can excite Wi-Fi 2.4G, Wi-Fi 5G and LAA modes (covering the frequency range of 2400-2484MHz and 5150-5925MHz). The third radiating part F3 can excite low, medium, high, ultra-medium frequency, ultra-high frequency, 5G N78 and N79 modes. The fourth radiation portion F4 can excite medium, high frequency, ultra-high frequency, 5G N78 and N79 modes (frequency coverage range 1710-2170MHz, 2300-2690MHz, 3300-3800MHz and 4400-5000MHz), thereby effectively improving the bandwidth and antenna efficiency, while having MIMO characteristics. Furthermore, by setting the switching circuit 19, the low-frequency modes of the antenna structure 100 can be effectively switched, thereby effectively improving the low-frequency bandwidth and having better antenna efficiency, so that the low frequency of the antenna structure 100 covers the B17 / B13 / B20 / B5 / B8 frequency bands. Among them, the frequency range of the B17 frequency band is 704-746MHz, the frequency range of the B13 frequency band is 746-787MHz, the frequency range of the B20 frequency band is 791-862MHz, and the frequency range of the B8 frequency band is 880-960MHz.

[0070] That is to say, the antenna structure 100 can cover the frequency bands used, such as low frequency, medium frequency, high frequency, ultra-medium frequency, ultra-high frequency, 5G N78 / N79, GPS, Wi-Fi 2.4G, Wi-Fi 5G and LAA, and greatly improve its bandwidth and antenna efficiency. It can also cover the application of global frequency bands and support the requirements of carrier aggregation applications (CA) of LTE-A. The antenna structure 100 can cover GSM850 / 900 / WCDMA B5 / B8 / B13 / B17 / B20 in low frequency, GSM 1800 / 1900 / WCDMA 2100 (1710-2170MHz) in medium frequency, LTE B7 / B40 / B41 (2300-2690MHz) in high frequency, super medium frequency 1427-1518MHz, ultra high frequency 3400-3800MHz, and 5G new spectrum N78 (3300-3800MHz) / N79 (4400-5000MHz). In addition, the antenna structure 100 can also cover GPS, Wi-Fi 2.4G, Wi-Fi 5G and LAA (5150-5925MHz). The designed frequency band of the antenna structure 100 can be applied to the operation of GSM Qual-band, UMTS Band I / II / V / VIII frequency bands and the commonly used LTE 850 / 900 / 1800 / 1900 / 2100 / 2300 / 2500 frequency bands worldwide.

[0071] Please also read Fig. 9 , which is an antenna structure 100a provided in the second preferred embodiment of the present invention, can be applied to electronic devices 200a such as mobile phones and personal digital assistants to transmit and receive radio waves to transmit and exchange wireless signals.

[0072] The antenna structure 100a at least includes a frame 110, a first feeding point 12, a second feeding point 13, a first grounding point 14, a third feeding point 15a, a fourth feeding point 16, a second grounding point 17 and a switching point 18. The frame 110 is provided with a first slot 120, a second slot 121 and a third slot 122 to divide the frame 110 into a first radiation portion F1, a second radiation portion F2, a third radiation portion F3 and a fourth radiation portion F4.

[0073] It can be understood that, in this embodiment, the difference between the antenna structure 100a and the antenna structure 100 is that the position of the third feeding point 15a on the third radiation portion F3 is different from the position of the third feeding point 15 on the third radiation portion F3. Specifically, in this embodiment, the third feeding point 15a is disposed on the third radiation portion F3 and is located between the first gap 120 and the switching point 18. That is, it is closer to the first gap 120 than the switching point 18.

[0074] It can be understood that in this embodiment, the working principles and specific operating frequency bands of the first radiating portion F1, the second radiating portion F2, and the fourth radiating portion F4 are the same as those of the first radiating portion F1, the second radiating portion F2, and the fourth radiating portion F4 in the antenna structure 100, and are not described in detail here. However, the working principle and specific operating frequency band of the third radiating portion F3 in the antenna structure 100a are different from the working principle and specific operating frequency band of the third radiating portion F3 in the antenna structure 100.

[0075] For details, please refer to Fig.10 In this embodiment, when current is fed from the third feeding point 15a, the current will flow through the third radiation portion F3 and flow to the third gap 122, then flow into the back plate 111, the system ground plane 112 and the middle frame 113, and then flow to the third feeding point 15a (see path P8), thereby exciting the third working mode to generate a radiation signal of the third radiation frequency band.

[0076] When current is fed in from the third feeding point 15a, the current will flow through the third radiating portion F3, and flow to the switching point 18 and the switching circuit 19, and then flow through the coupling current of the fourth feeding point 16 through the third radiating portion F3, and flow to the switching point 18 and the switching circuit 19 (see path P9), thereby exciting the fourth working mode to generate a radiation signal of the fourth radiation frequency band.

[0077] It can be understood that in this embodiment, the coupling current from the fourth feeding point 16 will also flow through the third radiation part F3 and flow to the switching point 18 and the switching circuit 19 (see path P10), thereby stimulating the fifth working mode and the sixth working mode to generate radiation signals of the fifth radiation frequency band and the sixth radiation frequency band.

[0078] Fig.11is a graph of the S parameter (scattering parameter) of the antenna structure 100a. Curve S111 is the S11 value of the third radiating portion F3 when the antenna structure 100a is working. Curve S112 is the S11 value of the first radiating portion F1 when the antenna structure 100a is working. Curve S113 is the S11 value of the second radiating portion F2 when the antenna structure 100a is working. Curve S114 is the S11 value of the fourth radiating portion F4 when the antenna structure 100a is working.

[0079] Fig.12 is a graph of the total radiation efficiency of the antenna structure 100a. Curve S121 is the total radiation efficiency of the third radiation portion F3 when the antenna structure 100a is working. Curve S122 is the total radiation efficiency of the first radiation portion F1 when the antenna structure 100a is working. Curve S123 is the total radiation efficiency of the second radiation portion F2 when the antenna structure 100a is working. Curve S124 is the total radiation efficiency of the fourth radiation portion F4 when the antenna structure 100a is working.

[0080] Obviously, similar to the antenna structure 100 in the first embodiment, the antenna structure 100a can form at least four independent radiating parts by setting multiple slots, such as a first slot 120, a second slot 121 and a third slot 122. Among them, the first radiating part F1 can excite GPS, Wi-Fi 2.4G, Wi-Fi 5G and LAA modes (covering the frequency range of 1575Hz, 2400-2484MHz and 5150-5925MHz). The second radiating part F2 can excite Wi-Fi 2.4G, Wi-Fi 5G and LAA modes (covering the frequency range of 2400-2484MHz and 5150-5925MHz). The third radiating part F3 can excite low, medium, high, ultra-medium frequency, ultra-high frequency, 5G N78 and N79 modes. The fourth radiation portion F4 can excite medium, high frequency, ultra-high frequency, 5G N78 and N79 modes (frequency coverage ranges 1710-2170MHz, 2300-2690MHz, 3300-3800MHz and 4400-5000MHz), thereby effectively improving the bandwidth and antenna efficiency, while having MIMO characteristics.

[0081] The above embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit it. Although the present invention is described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention. Those skilled in the art may also make other changes within the spirit of the present invention and apply them to the design of the present invention, as long as they do not deviate from the technical effects of the present invention. These changes made according to the spirit of the present invention should be included in the scope of protection claimed by the present invention.

Claims

1. An antenna structure of an electronic device, characterized in that: The antenna structure includes a frame, a back plate, a third feeding point and a fourth feeding point, the frame is at least partially made of metal material, at least a first slit and a third slit are provided on the frame, the frame is arranged at the edge of the back plate, and the edge of the back plate close to the frame is also provided with a slot, the first slit and the second slit are connected to the slot, the first slit and the third slit jointly divide a third radiating part and a fourth radiating part from the frame, the third feeding point is arranged on the third radiating part, and is electrically connected to a third feeding point to feed a current signal into the third radiating part, the fourth feeding point is arranged on the fourth radiating part, and is electrically connected to a fourth feeding point to feed a current signal into the fourth radiating part, when the third feeding point and the fourth feeding point are respectively fed with current, the third radiating part and the fourth radiating part generate at least one same radiation frequency band, wherein when the current is fed from the third feeding point, the third radiating part excites LTE-A low, medium, and high frequency modes, super medium frequency mode, ultra high frequency mode and 5G N78 / N79 mode; when the current is fed from the fourth feeding point, the fourth radiating portion excites the medium and high frequency modes, the ultra-high frequency mode and the 5G N78 / N79 mode; the antenna structure also includes a second grounding point, the second grounding point is arranged on the third radiating portion, and the second grounding point and the fourth feeding point are respectively arranged on both sides of the third gap; when the current is fed from the third feeding point, the current will flow through the third radiating portion to generate multiple current paths to excite LTE-A low, medium and high frequency modes, super medium frequency mode, ultra-high frequency mode and 5GN78 / N79 mode; When current is fed into the fourth feeding point, the current will flow through the fourth radiating portion to excite LTE-A medium and high frequency modes, ultra-high frequency modes and 5G N78 / N79 modes.

2. The antenna structure according to claim 1, characterized in that: The frame includes at least a first part and a third part, the third part is connected to one end of the first part, and the length of the third part is greater than the length of the first part, the first slit is opened in the first part, the third slit is opened in the third part, the frame between the first slit and the third slit constitutes the third radiation part, and the part of the frame where the third slit is away from the first slit and the third radiation part forms the fourth radiation part.

3. The antenna structure according to claim 1, wherein: The antenna structure also includes a switching circuit, which is arranged on the third radiating portion and located between the first gap and the second grounding point. The switching circuit is grounded to adjust the radiation frequency of the third radiating portion.

4. The antenna structure according to claim 3, characterized in that: The third feeding point is arranged between the switching circuit and the second grounding point, or the third feeding point is arranged between the switching circuit and the first gap.

5. The antenna structure according to claim 1, wherein: The frame also includes a second part, which is connected to the other end of the first part, and the length of the second part is greater than that of the first part. A second slit is also provided on the frame, and the second slit is provided in the second part. The frame between the first slit and the second slit constitutes a first radiating part, and the part of the frame where the second slit is away from the first slit and the first radiating part forms a second radiating part. The antenna structure also includes a first feeding point, a second feeding point and a first grounding point. The first feeding point is arranged on the first radiating part and is electrically connected to a first feeding point to feed a current signal to the first radiating part. The second feeding point is arranged on the second radiating part and is electrically connected to a second feeding point to feed a current signal to the second radiating part. The first grounding point is arranged on the first radiating part and is located between the first feeding point and the second feeding point. When the first feeding point and the second feeding point are respectively fed with current, the first radiating part and the second radiating part generate at least one identical radiation frequency band.

6. The antenna structure according to claim 5, characterized in that: The first grounding point and the second grounding point are symmetrically arranged.

7. The antenna structure according to claim 5, characterized in that: The second feeding point and the fourth feeding point are symmetrically arranged, and are both grounded through a system ground plane.

8. The antenna structure according to claim 5, characterized in that: When current is fed from the first feeding point, the first radiating part excites the GPS mode, WIFI 2.4GHz mode, WIFI 5GHz mode and licensed spectrum assisted access mode; when current is fed from the second feeding point, the second radiating part excites the WIFI 2.4GHz mode, WIFI 5GHz mode and licensed spectrum assisted access mode.

9. An electronic device, characterized in that: The electronic device comprises the antenna structure according to any one of claims 1 to 8.

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