Antenna and electronic equipment

Abstract

The invention provides an antenna and electronic equipment comprising the antenna. The antenna comprises an antenna body, a feeding point and a grounding point, wherein the feeding point and the grounding point are located on the antenna body. The antenna body comprises a first section and a second section which intersect. The electrical length from the feeding point to the first end of the antenna body is larger than the electrical length from the feeding point to the second end opposite to the first end, the antenna body generates resonance of a quarter of a second wavelength between the feeding point and the first end, and the antenna body generates resonance of a half of the second wavelength between the first end and the second end. In the application, the mode excitation generated by the resonance of the quarter of the second wavelength can be enhanced by the resonance of the half of the second wavelength, so that the transverse mode excitation and the longitudinal mode excitation of the antenna are relatively balanced, and therefore, when the electronic equipment is in a free state (FS) and a hand-held state, the antenna can be fully utilized. The antenna can have good radiation performance.

Description

[0001] This application is a divisional application. The application number of the original application is 202080058796.X, and the original application date is August 7, 2020. The entire contents of the original application are incorporated into this application by reference. Technical Field

[0002] The present application relates to the field of communication technology, and in particular to an antenna and an electronic device including the antenna. Background Art

[0003] The current antenna design for mobile phones and other electronic devices generally uses metal slits to achieve communication functions. That is, multiple slits are set on the conductive frame at intervals, and the part between adjacent slits forms the antenna body of the antenna. In current electronic devices, the slits are generally set on opposite sides of the frame of the electronic device, so that the antenna mainly generates transverse mode excitation or mainly generates longitudinal mode excitation, making the transverse mode excitation and longitudinal mode excitation unbalanced. When holding an electronic device, it is easy to block the slits on the frame, thereby weakening the transverse mode excitation or longitudinal mode excitation of the antenna, resulting in a death grip, and affecting the radiation performance of the antenna. Summary of the invention

[0004] The present application provides an antenna and an electronic device, aiming to solve the imbalance between the lateral mode excitation and the longitudinal mode excitation of the antenna, so that the antenna still has good antenna radiation performance when held in the hand.

[0005] In the first aspect, the present application provides an antenna. The antenna includes an L-shaped antenna body, the antenna body includes a first section and a second section intersecting the first section; the antenna body includes a feeding point and a grounding point arranged at intervals, the feeding point is used to connect to the RF front end, and the grounding point is used for grounding; the antenna body includes a first end and a second end that are separated from each other, the first end is an end of the first section away from the second section, and the second end is an end of the second section away from the first section; the electrical length from the feeding point to the first end is greater than the electrical length from the feeding point to the second end, the antenna body generates a resonance of one quarter of the first wavelength between the feeding point and the first end, and the antenna body generates a resonance of one half of the second wavelength between the first end and the second end, and the first wavelength is greater than the second wavelength.

[0006] The antenna may be a frame antenna (i.e., the frame of the electronic device is used as the antenna body), a flexible printed circuit (FPC) antenna, a laser direct structuring (LDS) antenna, or a microstrip disk antenna (MDA) antenna. When the antenna is a flexible mainboard antenna, the antenna body may be a straight strip structure, and the antenna body is bent to form an L-shaped antenna body when in use.

[0007] Wherein, the antenna body generates a resonance of one quarter of the first wavelength between the feed point and the first end, that is, the electrical length between the feed point and the first end is approximately one quarter of the first wavelength, so that the antenna body can generate a resonance of one quarter of the first wavelength between the feed point and the first end. The antenna body generates a resonance of one half of the second wavelength between the first end and the second end, that is, the electrical length between the first end and the second end is approximately one half of the second wavelength, so that the antenna body can generate a resonance of one half of the second wavelength between the first end and the second end. In some embodiments, the first wavelength and the second wavelength are the operating wavelengths of signals with radiation frequencies in the same frequency band (such as B28, B5, B8, etc.) under the LTE standard.

[0008] In the embodiment of the present application, since the electrical length from the feed point to the first end is greater than the electrical length from the feed point to the second end, by making the electrical length of the section with a longer electrical length (the section between the feed point and the first end) approximately one-quarter of the wavelength, the resonance between the feed point and the first end produces a resonance of one-quarter of the second wavelength. Therefore, the resonance of one-quarter of the second wavelength in the embodiment of the present application can have a larger radiation aperture, so that the antenna has better radiation performance. The resonance of one-quarter of the second wavelength generated by the antenna body between the feed point and the first end can generate mode excitation in a direction perpendicular to the side where the first end is located. In the embodiment of the present application, the first end is an end of the first section away from the second section, and in some embodiments, the direction of the first section is in the transverse direction or the longitudinal direction, that is, the resonance of one-quarter of the second wavelength of the antenna can generate transverse mode excitation or longitudinal mode excitation. Since a resonance of one-half the second wavelength is formed between the first end and the second end, and the antenna body is L-shaped, it is possible to generate mode excitation perpendicular to the direction of the first section and mode excitation perpendicular to the direction of the second section. In some embodiments, mode excitation in the lateral direction and mode excitation in the longitudinal direction can be generated, thereby assisting in enhancing the mode excitation generated by the resonance of one-quarter of the second wavelength, so that the lateral mode excitation and longitudinal mode excitation of the antenna can be relatively balanced, and the antenna still has good antenna radiation performance when held in the hand. In other words, the resonance of the antenna body of the present application can generate a resonance of one-quarter of the second wavelength while also generating a resonance of one-half of the second wavelength. The resonance of one-half of the second wavelength can enhance the mode excitation generated by the resonance of one-quarter of the second wavelength and the mode excitation in another direction, so that the lateral mode excitation and longitudinal mode excitation of the antenna are relatively balanced.

[0009] Among them, mode excitation refers to the different modes generated by the antenna after adding port excitation to the antenna. It is manifested as the distribution of different characteristic currents generated by the excitation on the antenna ground. For example, in the embodiment of the present application, the resonance of one quarter of the second wavelength of the antenna generates mode excitation in a direction perpendicular to the side where the first end is located, that is, the main flow direction of the characteristic current generated by the excitation on the antenna ground is the direction perpendicular to the side where the first end is located. When the direction on the side where the first end is located is the transverse direction, the longitudinal mode excitation is mainly generated. When the direction on the side where the first end is located is the longitudinal direction, the transverse mode excitation is mainly generated; the resonance of one half of the second wavelength of the antenna generates mode excitation perpendicular to the direction of the first section and mode excitation perpendicular to the direction of the second section, that is, the main flow direction of the characteristic current generated by the excitation on the antenna ground is the direction perpendicular to the side where the first end is located and the direction perpendicular to the side where the second end is located.

[0010] In an embodiment of the present application, the first wavelength is greater than the second wavelength, that is, the frequency of the resonance generated between the feeding point and the first end is less than the frequency of the resonance generated between the first end and the second end, thereby avoiding the generation of an efficiency pit in the same operating frequency band between the resonance at one quarter of the first wavelength and the resonance at one half of the second wavelength, so that the antenna can have good radiation performance within the operating frequency band.

[0011] In some embodiments, the difference between the frequency of the resonance generated between the feeding point and the first end and the frequency of the resonance generated between the first end and the second end is between 50 MHz and 200 MHz, so that the fusion between the resonance of one quarter of the first wavelength and the resonance of one half of the second wavelength is better, so that the antenna can have good radiation performance both in the free state and in the hand-held state.

[0012] In some embodiments, the antenna includes a first switching circuit, a first connection point is provided on the antenna body, and the first connection point is located on a side of the feeding point and the grounding point away from the second end; one end of the first switching circuit is connected to the first connection point, and the other end is grounded; the first switching circuit is used to change the electrical length from the feeding point to the first end. In the embodiment of the present application, the first switching circuit is connected to the first connection point, that is, the first switching circuit is connected to the antenna body through the first connection point, so that the electrical length from the feeding point to the first end can be changed through the first switching circuit, and the electrical length from the first end to the second end can be changed, thereby changing the operating frequency of the resonance of one quarter of the first wavelength and the resonance of one half of the second wavelength.

[0013] In some embodiments, the first connection point may also be located on the side of the feeding point and the grounding point away from the first end, thereby changing the electrical length from the feeding point to the second end, changing the electrical length from the first end to the second end, and further changing the resonant operating frequency of half the second wavelength.

[0014] In some embodiments, the antenna includes a second switching circuit, and a second connection point is further provided on the antenna body, and the feeding point and the grounding point are located between the first connection point and the second connection point; one end of the second switching circuit is connected to the second connection point, and the other end is grounded; the second switching circuit is used to change the electrical length from the feeding point to the second end. In the embodiment of the present application, the second switching circuit is connected to the second connection point, that is, the second switching circuit is connected to the antenna body through the second connection point to change the electrical length from the feeding point to the second end. The first switching circuit changes the electrical length from the feeding point to the first end, thereby changing the resonant operating frequency of one quarter of the first wavelength, and the second switching circuit cooperates with the first switching circuit to change the electrical length of the antenna body (that is, the electrical length from the first end to the second end), thereby changing the resonant operating frequency of one half of the second wavelength.

[0015] It can be understood that, in some embodiments, the position of the first switching circuit and the position of the second switching circuit can be interchanged.

[0016] In some embodiments, the first switching circuit includes a first switching switch and a plurality of different first tuning elements connected to the ground, and the first switching switch can switchably connect different first tuning elements to change the electrical length from the feeding point to the first end. By connecting the first switching switch to different first tuning elements in a switchable manner, the first tuning elements connected to the antenna body are different. Among them, the different first tuning elements can be different types of tuning elements, such as capacitors, inductors or resistors, etc.; they can also be tuning elements of the same type with different specifications and sizes, such as each tuning element is an inductor, but the inductance value of each tuning element is different. By connecting different first tuning elements to the antenna body, the electrical length from the first end to the second end of the antenna body and the electrical length from the feeding point to the first end are changed, thereby adjusting the operating frequency of the resonance of one quarter of the first wavelength and the resonance of one half of the second wavelength generated by the antenna body to change.

[0017] In some embodiments, the first switching circuit includes a first switching switch and a plurality of different first tuning elements connected to the ground, and the second switching circuit includes a second switching switch and a plurality of different second tuning elements connected to the ground, and the plurality of first tuning elements correspond to the plurality of second tuning elements one by one; when the first switching switch is switchably connected to different first tuning elements, the second switching switch is switchably connected to the second tuning element corresponding to the first tuning element connected to the first switching switch. The different second tuning elements may be tuning elements of different types, such as capacitors, inductors, or resistors, etc.; or they may be tuning elements of the same type with different specifications and sizes, such as each tuning element is an inductor, but the inductance values ​​of each tuning element are different.

[0018] In the embodiment of the present application, when the first switching switch can be switchably connected to different first tuning elements, the second switching switch can be switchably connected to the second tuning element corresponding to the first tuning element connected to the first switching switch, so that the size of the first tuning element and the second tuning element connected to the antenna body changes, so as to change the electrical length between the feeding point and the first end and between the first end and the second end, thereby adjusting the operating frequency of the resonance of one quarter of the first wavelength and the resonance of one half of the second wavelength generated by the antenna body. In addition, since the second tuning element connected to the second switching switch corresponds to the first tuning element connected to the first switching switch, the operating frequency range of the resonance of one quarter of the first wavelength and the resonance of one half of the second wavelength generated by the antenna body is always maintained between 50MHz and 200MHz, so that the fusion between the resonance of one quarter of the first wavelength and the resonance of one half of the second wavelength is better, so that the antenna can have good radiation performance both in the free state and in the hand-held state.

[0019] In some embodiments, the first switching switch includes a plurality of first fixed ends and a first movable end switchably connected to the plurality of first fixed ends, the first movable end is connected to the first connection point, and each of the first fixed ends is connected to one of the first tuning elements; the second switching switch includes a plurality of second fixed ends and a second movable end switchably connected to the plurality of second fixed ends, the second movable end is connected to the second connection point, and each of the second fixed ends is connected to one of the second tuning elements. In the embodiment of the present application, the first movable end can be switchably connected to different first fixed ends, so that the first tuning elements connected to different first fixed ends are connected to the antenna body; the second movable end can be switchably connected to different second fixed ends, so that the second tuning elements connected to different second fixed ends are connected to the antenna body.

[0020] In some embodiments, the first switching switch may be a single-pole multi-throw switch or a multi-pole multi-throw switch. When the first switching switch is a single-pole multi-throw switch, there is one first movable end, and one first movable end can be switchably connected to multiple first fixed ends; when the first switching switch is a multi-pole multi-throw switch, there are multiple first movable ends. In some embodiments, the number of first movable ends is the same as the number of first fixed ends, and the multiple first movable ends correspond to the multiple first fixed ends one by one. Each first movable end can be connected or disconnected with its corresponding first fixed end.

[0021] The first tuning element or the second tuning element is any one or more of a capacitor, an inductor, and a resistor connected in parallel or in series.

[0022] In some embodiments, a third tuning element is connected between the grounding point and the grounding position of the grounding point, and the third tuning element is used to adjust the electrical length of the antenna body. In the embodiment of the present application, a third tuning element is connected between the grounding point and the grounding position, so that the electrical length from the first end to the second end and the electrical length from the feeding point to the first end are changed, thereby adjusting the resonance generated from the first end to the second end of the antenna body and the resonance generated from the feeding point to the first end, so as to obtain the desired resonance mode (such as the resonance of one quarter of the first wavelength and the resonance of one half of the second wavelength in some embodiments of the present application).

[0023] In some embodiments, the length of the first side is greater than the length of the second side, and the distance from the first gap to the second side is greater than the distance from the second gap to the first side.

[0024] In an embodiment of the present application, the distance from the first slit to the second side is greater than the distance from the second slit to the first side. In other words, in some embodiments, the antenna body includes an intersecting first section and a second section, the first section is a section from the first slit of the first side to the second side, and the second section is a section from the second slit of the second side to the first side. Since the shorter second section of the antenna body is located on the shorter second side of the frame, and the longer first section of the antenna body is located on the longer first side of the frame, more L-shaped antennas can be arranged on the frame, making the antenna layout on the frame more reasonable.

[0025] In some embodiments, the distance from the first gap to the second edge is greater than or equal to 90 mm, which can to a certain extent avoid holding the first gap when holding the electronic device, so that the antenna can still have good radiation performance when held in the hand.

[0026] In some embodiments, the feed point is located on the first side. Since in some embodiments, the length of the first section of the antenna body is greater than the length of the second section of the antenna body, the feed point being located on the first side means that the antenna body is located on the first section. Since the length of the first section of the antenna body is greater than the length of the second section of the antenna body, in some embodiments, the physical length from the feed point to the first end will be greater than the physical length from the feed point to the second end, so that only a smaller tuning element needs to be connected between the feed point and the first end, or no tuning element needs to be connected, so that the electrical length from the feed point to the first end is greater than the electrical length from the feed point to the second end, and the feed point to the first end can generate a resonance of one quarter of the first wavelength, thereby reducing the manufacturing cost.

[0027] In the second aspect, the present application provides an electronic device. The electronic device includes a conductive frame, a radio frequency front end, and the antenna, the frame includes a first side and a second side intersecting the first side, the first side is provided with a first slit, the second side is provided with a second slit, the portion of the frame between the first slit and the second slit forms the antenna body of the antenna, the section between the first slit and the second side of the frame is the first section of the antenna body, and the section between the second slit and the first side of the frame is the second section of the antenna body; the radio frequency front end is connected to the feeding point of the antenna body, and is used to feed the radio frequency signal to the antenna body or receive the radio frequency signal transmitted from the antenna body. In some embodiments of the present application, the first side of the electronic device is the longitudinal direction, and the second side is the transverse direction; or, the first side of the electronic device is the transverse direction, and the second side is the longitudinal direction.

[0028] In the embodiment of the present application, since the section between the first slit and the second side of the frame is the first section of the antenna body, and the section between the second slit and the first side of the frame is the second section of the antenna body, the resonance of one quarter of the second wavelength of the antenna can produce lateral excitation or longitudinal excitation, and the resonance of one half of the second wavelength of the antenna can produce lateral excitation and longitudinal excitation, so that the lateral mode excitation and longitudinal mode excitation of the antenna are both strong, and the lateral mode excitation and longitudinal mode excitation of the antenna are relatively balanced, so that the electronic device including the antenna can have good radiation performance when it is in a free state (FS) and in a hand-held state. In addition, using part of the frame between the first slit and the second slit as the antenna body can reduce the volume occupied by the antenna, simplify the structure of the electronic device, and reduce the manufacturing process.

[0029] In a third aspect, the present application provides an electronic device. The electronic device includes an insulating frame, a radio frequency front end, and the antenna, the frame includes a first side and a second side intersecting the first side, the first section of the antenna is arranged close to the first side, and the second section of the antenna is arranged close to the second side; the radio frequency front end is connected to the feeding point of the antenna body, and is used to feed radio frequency signals to the antenna body or receive radio frequency signals transmitted from the antenna body. In some embodiments of the present application, the first side of the electronic device is the longitudinal direction, and the second side is the transverse direction; or, the first side of the electronic device is the transverse direction, and the second side is the longitudinal direction. In some embodiments of the present application, the first side of the electronic device is the longitudinal direction, and the second side is the transverse direction; or, the first side of the electronic device is the transverse direction, and the second side is the longitudinal direction.

[0030] In the embodiment of the present application, since the first section of the antenna is arranged close to the first side and the second section of the antenna is arranged close to the second side, the resonance of one quarter of the second wavelength of the antenna can generate lateral direction excitation or longitudinal direction excitation, and the resonance of one half of the second wavelength of the antenna can generate lateral direction excitation and longitudinal direction excitation, so that the lateral mode excitation and longitudinal mode excitation of the antenna are both strong, and the lateral mode excitation and longitudinal mode excitation of the antenna are relatively balanced, so that the electronic device including the antenna can have good radiation performance when it is in a free state (FS) and a hand-held state. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the structural features and functions of the present application, it is described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] Figure 1 A schematic diagram of the structure of an electronic device according to an embodiment of the present application;

[0033] Figure 2 A schematic diagram of the structure of an antenna according to an embodiment of the present application;

[0034] Figure 3 For this application Figure 1 A schematic diagram of the internal structure of an electronic device according to the embodiment shown;

[0035] Figure 4 is a schematic diagram of the internal structure of another electronic device;

[0036] Figure 5 A schematic diagram of a holding state of an electronic device, where the electronic device is in a vertical screen state;

[0037] Figure 6 for Figure 3 The electronic equipment shown is Figure 5When the state is shown, the return loss coefficient (S11) curve of the antenna in different states is shown. Figure 3 The first end of the antenna of the electronic device is located at the first side;

[0038] Figure 7 for Figure 3 The electronic equipment shown is Figure 5 In the state shown, the simulation diagram of the current and radiation direction when the antenna is in a free state;

[0039] Figure 8 for Figure 3 The electronic equipment shown is Figure 5 The radiation efficiency diagram of the antenna in the state shown;

[0040] Fig. 9 is a curve diagram of the return loss coefficient (S11) of the antenna of another electronic device of the present application, Fig. 9 The first end of the antenna of the characterized electronic device is located on the second side;

[0041] Fig.10 Shown Fig. 9 a system efficiency diagram of the characterized antenna 40;

[0042] Fig.11 is a schematic diagram of another holding state of the electronic device, where the electronic device is in a horizontal screen state;

[0043] Fig.12 Shown Figure 3 The electronic equipment shown is Fig.11 In the state shown, the system efficiency diagram and radiation efficiency diagram of the antenna in the free state and the hand-held state;

[0044] Fig.13 for Figure 3 The system efficiency diagram and radiation efficiency diagram of the antenna of the electronic device shown in different states;

[0045] Fig.14 is a schematic structural diagram of an antenna according to another embodiment;

[0046] Fig.15a is a schematic structural diagram of an antenna according to another embodiment;

[0047] Fig.15b is a schematic structural diagram of an antenna according to another embodiment;

[0048] Fig.16 is a schematic structural diagram of an antenna according to another embodiment;

[0049] Fig.17 for Fig.16 Return loss diagram when the moving end of the switching switch of the antenna is switched and connected to three different tuning elements respectively;

[0050] Fig.18 for Fig.16 The system efficiency and radiation efficiency diagrams are shown when the moving end of the switch of the antenna is switched to be connected to three different tuning elements. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0052] The present application provides an electronic device, which includes an antenna for communicating with the outside world. When the electronic device is in a natural state (free style, FS) or a head-hand state (including a left head-hand state and a right head-hand state), the antenna can have a better working effect, avoiding the influence of holding the electronic device on the signal transmission of the antenna, especially avoiding the influence of holding the electronic device on the low-frequency (low band, LB) signal transmission of the antenna. Among them, the frequency of the low-frequency signal of the antenna is generally between 699MHz and 960MHz. The electronic device can be a portable electronic device or other suitable electronic device. For example, the electronic device can be a laptop computer, a tablet computer, a smaller device, such as a mobile phone, a watch, a pendant device or other wearable or micro device, a cellular phone, a media player, etc.

[0053] See also Figure 1 , Figure 1 The structure diagram of the electronic device 100 of an embodiment of the present application is shown. In this embodiment, the electronic device 100 is a mobile phone. The electronic device 100 includes a frame 10 and a display screen 20. The frame 10 is arranged around the display screen 20. The frame 10 includes two first sides 11 arranged opposite to each other and two second sides 12 intersecting the two first sides 11, and the two first sides 11 and the two second sides 12 are connected end to end to form a square frame 10. In this embodiment, the electronic device 100 is a square plate-like structure, that is, the frame 10 is square. In some embodiments, the frame 10 has chamfers, so that the frame 10 has a more beautiful effect. The extension direction of the second side 12 is the lateral direction (the X direction shown in the figure), and the extension direction of the first side 11 is the longitudinal direction (the Y direction shown in the figure). In this embodiment, the length of the first side 11 is greater than the length of the second side 12. It can be understood that in some embodiments, the extension directions of the first side 11 and the second side 12 can be changed, and the lengths of the first side 11 and the second side 12 can also be changed, and again no specific limitation is made. For example, in some embodiments, the extension direction of the first side 11 may be a lateral direction, and the extension direction of the second side 12 may be a longitudinal direction. The length of the first side 11 may also be less than the length of the second side 12. In this embodiment, the material forming the frame 10 may be a conductive material such as metal, or a non-conductive material such as plastic or resin.

[0054] The display screen 20 is used to display images, videos, etc. The display screen 20 can be a flexible display screen or a rigid display screen. For example, the display screen 20 can be an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode (MIL-E) display screen, a micro organic light-emitting diode (MIL-E) display screen, a micro organic light-emitting diode (MIL-E) display screen, a quantum dot light-emitting diode (QLED) display screen, or a liquid crystal display (LCD).

[0055] See also Figure 2 , the electronic device 100 also includes an antenna 40 and a radio frequency front end 50. The antenna 40 includes an antenna body 41, and the antenna body 41 is used to radiate radio frequency signals to the outside world or receive radio frequency signals from the outside world, so that the electronic device 100 can communicate with the outside world through the antenna body 41. The radio frequency front end 50 is connected to the antenna body 41, and is used to feed radio frequency signals to the antenna body 41 or receive radio frequency signals from the outside world received by the antenna body 41. In some embodiments, the radio frequency front end 50 includes a transmitting path and a receiving path. The transmitting path includes devices such as power amplifiers and filters, and the signals are transmitted to the antenna body 41 after power amplification, filtering and other processing by the power amplifiers and filters, and then transmitted to the outside world through the antenna body 41; the receiving path includes devices such as low noise amplifiers and filters, and the external signals received by the antenna body 41 are low-noise amplified, filtered and other processing by the low noise amplifiers and filters, and then transmitted to the radio frequency chip, so that the electronic device 100 can communicate with the outside world through the radio frequency front end 50 and the antenna 40.

[0056] The antenna body 41 is an L-shaped structure, including a first section 411 and a second section 412 intersecting the first section 411. The end of the first section 411 away from the second section 412 is the first end A, and the end of the second section 412 away from the first section 411 is the second end B. It should be emphasized that in some other embodiments of the present application, the first end A and the second end B can be interchanged. In other words, in some embodiments, the end of the second section 412 away from the first section 411 is the first end A, and the end of the first section 411 away from the second section 412 is the second end B.

[0057] The antenna body 41 includes a feeding point 413 and a grounding point 414 that are spaced apart. The grounding point 414 can be located between the feeding point 413 and the first end A, or between the feeding point 413 and the second end B. The feeding point 413 is used to be electrically connected to the RF front end 50, so that the signal generated by the RF front end 50 can be transmitted to the antenna body 41 through the feeding point 413, and transmitted to the outside through the antenna body 41. Alternatively, the external signal received by the antenna body 41 is transmitted to the RF front end 50 through the feeding point 413. It should be noted that the feeding point 413 of the present application is not an actual point, and the position where the RF front end 50 is connected to the antenna body 41 is the feeding point 413 mentioned in the present application.

[0058] The grounding point 414 is grounded, and the electrical length of the antenna body 41 can be adjusted by adjusting the position of the grounding point 414. The change in electrical length can change the resonant frequency of the antenna body 41. In some embodiments, the grounding point 414 is grounded through a grounding member such as a grounding spring or a grounding wire. One end of the grounding member is connected to the grounding point 414 of the antenna body 41, and the other end is grounded, thereby achieving the grounding of the grounding point 414. It should be noted that the grounding point 414 of the present application is not an actual point, and the position where the grounding member such as a grounding spring or a grounding wire is connected to the antenna body 41 is the grounding point 414.

[0059] It should be noted that the electrical length of the antenna body 41 mentioned in the present application can be measured in a variety of ways. For example, in some embodiments, the electrical length of the antenna body 41 can be measured by a passive test method. Specifically, the antenna is made into a jig, and then the first end A and the second end B of the antenna body 41 are sealed with copper foil respectively, and the changes in the return loss diagram of the antenna measured at different times are observed, so that the electrical length from the first end A to the second end B of the antenna body 41 and the electrical length from the feeding point 413 to the first end A or the second end B can be determined.

[0060] See also Figure 3 , Figure 3 Shown Figure 1Schematic diagram of the internal structure of the electronic device 100 shown. The electronic device 100 also includes a middle frame 30, the display screen 20 and the middle frame 30 are stacked, and the frame 10 is arranged around the middle frame 30. In the present embodiment, the middle frame 30 is made of a conductive material such as metal (such as a metal material), and the middle frame 30 is grounded. When the frame 10 is made of a conductive material, at least a portion of the frame 10 can be electrically connected to the middle frame 30 to achieve grounding of the frame 10 through the middle frame 30. It can be understood that in some other embodiments of the present application, the electronic device 100 may not have a middle frame 30, and the frame 10 may be connected to other grounding positions through a grounding member for grounding.

[0061] In some embodiments of the present application, the frame 10 is made of metal material, and a partial section of the frame 10 can be used as the antenna body 41 , thereby reducing the space occupied by the antenna 40 . Figure 3 In the illustrated embodiment, a first slit 111 is provided on a first side 11, a second slit 121 is provided on a second side 12, and the frame 10 between the first slit 111 and the second slit 121 forms the antenna body 41 of the present embodiment. The portion of the first side 11 between the first slit 111 and the second side 12 is the first section 411 of the antenna body 41, and the portion of the second side 12 between the second slit 121 and the first side 11 is the second section 412 of the antenna body 41. The antenna body 41 is electrically isolated from the other parts of the frame 10 except the antenna body 41 by the first slit 111 and the second slit 121. In addition, there is a gap 42 between the antenna body 41 and the middle frame 30, thereby ensuring that the antenna body 41 has a good clearance environment, so that the antenna 40 has a good signal transmission function. In some embodiments, the other parts of the frame 10 except the antenna body 41 can be connected to the middle frame 30 and integrally formed. It can be understood that when the other parts of the frame 10 except the antenna body 41 are used as the antenna body of other antennas of the electronic device (such as a WIFI antenna, a GPS antenna, etc.), there is a gap 42 between the other parts of the frame 10 except the antenna body and the middle frame 30 to ensure that the antenna has a good clearance environment.

[0062] The antenna body 41 includes a first end A and a second end B. In this embodiment, the end surface of the first end A faces the first slit 111, and the end surface of the second end B faces the second slit 121. At this time, the first end A is located in the longitudinal direction of the electronic device 100, and the second end B is located in the transverse direction of the electronic device 100. It can be understood that when the extension direction of the first side 11 of the antenna body A is the transverse direction and the extension direction of the second side 12 is the longitudinal direction, the first end A with the end surface facing the first slit 111 is located in the transverse direction, and the second end B with the end surface facing the second slit 121 is arranged in the longitudinal direction.

[0063] In the present application, there is no specific limitation on the distance between the first slot 111 and the second side 12 and the distance between the second slot 121 and the first side 11. In some embodiments, the distance between the first slot 111 and the second side 12 or the distance between the second slot 121 and the first side 11 is greater than 90 mm, which can avoid holding the first slot 111 or the second slot 121 when holding the electronic device to a certain extent, so that the antenna 40 can still have good radiation performance when held in the hand.

[0064] In some embodiments, the length of the first side 11 is greater than the length of the second side 12, and the distance from the first slit 111 to the second side 12 is greater than the distance from the second slit 121 to the first side, that is, the length of the first section 411 is greater than the length of the second section 412. Since the shorter second section 412 of the antenna body 41 is located on the shorter second side 12 of the frame 10, and the longer first section 411 of the antenna body 41 is located on the longer first side 11 of the frame 10, more L-shaped antennas can be arranged on the frame 10, making the antenna layout on the frame 10 more reasonable.

[0065] In some embodiments, the first gap 111 and the second gap 121 may be filled with dielectric material to further enhance the electrical isolation effect of the antenna body 41 from other parts of the frame 10 except the antenna 40 body.

[0066] See also Figure 4 In some embodiments, when the frame 10 of the electronic device 100 is made of non-conductive material, the frame 10 cannot be used as the antenna body 41. Figure 3 The difference between the illustrated embodiments is that the antenna body 41 is located inside the electronic device 100. In this embodiment, the antenna body 41 is arranged close to the frame 10 to minimize the volume occupied by the antenna 40 and to make the antenna 40 closer to the outside of the electronic device 100, thereby achieving a better signal transmission effect. It should be noted that the antenna body 41 arranged close to the frame 10 in this application means that the antenna body 41 can be arranged close to the frame 10, or it can be arranged close to the frame 10, that is, there can be a certain small gap between the antenna body 41 and the frame 10. In this embodiment, the first gap 111 and the second gap 121 do not need to be arranged on the frame 10, and the radio frequency signal output or received by the antenna body 41 can be transmitted through the frame 10, thereby avoiding the frame 10 from restricting the transmission of the antenna 40 signal. Among them, the antenna 40 can be in the form of a flexible printed circuit (FPC) antenna, a laser direct structuring (LDS) antenna, or a microstrip disk antenna (MDA) and other antenna forms.

[0067] Figure 3 and Figure 4 In the illustrated embodiment, the antenna body 41 and the middle frame 30 are connected via a grounding spring 44. Since the middle frame 30 is grounded, the grounding point 414 is grounded via the grounding spring 44. Specifically, one end of the grounding spring 44 is connected to the antenna body 41, and the other end is connected to the middle frame 30. The position where the grounding spring 44 is connected to the antenna body 41 is the grounding point 414 of the antenna body 41. Figure 3 and Figure 4 In the illustrated embodiment, the antenna body 41 and the RF front end 50 are connected via a feeding spring 43. Specifically, one end of the feeding spring 43 is connected to the antenna body 41, and the other end is connected to the RF front end 50. The position where the feeding spring 43 is connected to the antenna body 41 is the feeding point 413 of the antenna body 41. It is understandable that in some other embodiments of the present application, the antenna body 41 can be connected to the middle frame 30 through other structures such as connecting leads, and can also be connected to the RF front end 50 through other structures such as connecting leads, which are not specifically limited here.

[0068] In some embodiments, the electrical length from the feed point 413 to the first end A is greater than the electrical length from the feed point 413 to the second end B, and the electrical length from the feed point 413 to the first end A is approximately one-quarter of the first wavelength, so that the section between the feed point 413 and the first end A of the antenna body 10 can produce a resonance of one-quarter of the first wavelength. When the antenna 40 is working, the resonance of one-quarter of the first wavelength produced by the section between the feed point 413 and the first end A of the antenna body 41 can excite a mode excitation perpendicular to the direction of the first end A. The first wavelength is the working wavelength of the resonance of one-quarter of the first wavelength. For example, Figure 3 In the illustrated embodiment, the extension direction of the first side 11 is the longitudinal direction (the Y direction in the figure), and the end surface of the first end A faces the first slot 111 on the first side 11, that is, the first end A is located in the longitudinal direction. At this time, the resonance of one quarter of the first wavelength generated between the feeding point 413 of the antenna body 41 and the first end A will excite the transverse mode excitation. In some embodiments, when the extension direction of the first side 11 is the transverse direction (the X direction in the figure), the end surface of the first end A faces the first slot 111 on the first side 11, that is, the first end A is located in the transverse direction. At this time, the resonance of one quarter of the first wavelength generated in the section between the feeding point 413 and the first end A will excite the longitudinal mode excitation.

[0069] In the embodiment of the present application, since the electrical length from the feeding point 413 to the first end A is greater than the electrical length from the feeding point 413 to the second end B, the section with a longer electrical length (i.e., the section between the feeding point 413 and the first end A) is made to be approximately one-quarter of the first wavelength to generate a resonance of one-quarter of the first wavelength, so that the resonance of one-quarter of the first wavelength can have a larger radiation aperture, thereby enabling the antenna 40 to have better radiation performance.

[0070] In the embodiment of the present application, the feeding point 413 can be set at any position of the antenna body 41. Specifically, the position of the feeding point 413 or the position of the first end A can be changed accordingly according to the actual situation of the specific electronic device 100, so as to control the direction of the generated mode excitation. Figure 3 When the electronic device 100 shown in FIG. 1 is designed to have a narrow chin, the bottom side ( Figure 3 The clearance space of the side of the electronic device 100 (the side extending along the X-axis direction) is small, and the side of the electronic device 100 ( Figure 3 When the clearance environment of the side of the electronic device 100 is not good, but the clearance environment of the bottom plate is good, the first side 11 of the frame 10 can be set at the bottom of the electronic device, so that the extension direction of the first side 11 is the X direction, and the first end A is located in the horizontal direction, so as to obtain the mode excitation in the longitudinal direction. In this embodiment, the extension direction of the first side 11 is the Y direction, and the first end A is located in the longitudinal direction. The feeding point 413 is located on the first section 411 of the antenna body 41. In the present embodiment, the length of the first section 411 of the antenna body 41 is greater than the length of the second section 412, so that when the feeding point 413 is set on the first section 411, the physical length from the feeding point 413 to the first end A will generally be greater than the physical length from the feeding point 413 to the second end B, so that it is only necessary to connect a smaller tuning element between the feeding point 413 and the first end A or not connect the tuning element to achieve that the electrical length from the feeding point 413 to the first end A is greater than the electrical length from the feeding point 413 to the second end B, and the feeding point 413 to the first end A can resonate to produce a resonance of one quarter of the first wavelength, thereby reducing the manufacturing cost.

[0071] In some embodiments of the present application, the electrical length from the first end A to the second end B is about half of the second wavelength, and the antenna body 41 can generate a resonance of half the second wavelength between the first end A and the second end B. The second wavelength is the wavelength of the resonance of half the second wavelength formed by the first end A to the second end B. In some embodiments, the first wavelength and the second wavelength are the operating wavelengths of signals with radiation frequencies in the same frequency band (such as B28, B5, B8, etc.) under the LTE standard. Since the antenna body 41 is L-shaped, it can generate mode excitations perpendicular to the direction of the first section 411 and mode excitations perpendicular to the direction of the second section 412, that is, it can generate mode excitations in the lateral direction and mode excitations in the longitudinal direction, and then it can assist in enhancing the mode excitations generated by the resonance of one quarter of the first wavelength, so that the lateral mode excitation and longitudinal mode excitation of the antenna 40 can be stronger, that is, the lateral mode excitation and longitudinal mode excitation of the antenna can be more balanced, so that the antenna 40 still has good antenna radiation performance in the hand-held state. In other words, the resonance of the antenna body 41 of the present application can generate a resonance of one quarter of the first wavelength and a resonance of one half of the second wavelength. The resonance of one half of the second wavelength can enhance the mode excitation generated by the resonance of one quarter of the first wavelength, so that the lateral mode excitation and the longitudinal mode excitation of the antenna 40 are relatively balanced, so that the antenna 40 can have good radiation performance when the electronic device 100 is in a free state (FS) and in a hand-held state. For example, Figure 3 In the embodiment, the resonance of one quarter of the first wavelength generates transverse mode excitation, and the resonance of one half of the second wavelength generates transverse mode excitation and longitudinal mode excitation, so that when the electronic device 100 is in a free state, the transverse mode excitation and the longitudinal mode excitation are both strong, and the antenna 40 has good radiation performance. When the electronic device 100 is held by hand so that the electronic device 100 is in a portrait orientation, the hand holds the first side 11 of the electronic device 100, which partially affects the size of the transverse mode excitation of the electronic device 100, but does not affect the intensity of the longitudinal mode excitation, so that the antenna 40 still has good radiation performance. When the electronic device 100 is held by hand so that the electronic device 100 is in a landscape orientation, the hand holds the second side 12 of the electronic device 100, which partially affects the size of the longitudinal mode excitation of the electronic device 100, but does not affect the intensity of the transverse mode excitation, so that the antenna 40 still has good radiation performance.

[0072] In the present application, the antenna 40 generates a resonance of one quarter of the first wavelength and a resonance of one half of the second wavelength when working. In some embodiments, the first wavelength is greater than the second wavelength, that is, the frequency of the resonance of one quarter of the first wavelength is less than the frequency of the resonance of one half of the second wavelength, so as to avoid the generation of efficiency pits in the same working frequency band (such as B28 band, B5 band, B8 band, etc.), so that the antenna 40 can have good radiation performance in the working frequency band.

[0073] In some embodiments, the difference between the frequency of the resonance generated between the feed point and the first end and the frequency of the resonance generated between the first end and the second end is between 50MHz and 200MHz, so that the fusion between the resonance of one quarter of the first wavelength and the resonance of one half of the second wavelength is better, so that the antenna can have good radiation performance both in a free state and in a hand-held state. In some embodiments, the difference between the frequency of the resonance of one quarter of the first wavelength and the frequency of the resonance of one half of the second wavelength can be between 50MHz and 150MHz.

[0074] See also Figures 5 to 8 , Figure 6 yes Figure 3 The return loss coefficient (S11) curve diagram of the antenna 40 of the electronic device 100 in different states (including the free state, the left head-hand state, and the right head-hand state) is shown. Figure 3 In the illustrated embodiment, the first end A is located on the first side 11 of the frame 10 , and the first side 11 is located in the longitudinal direction. Figure 6 The horizontal axis is the frequency (in GHz), and the vertical axis is the return loss coefficient (in dB). Curve a represents the return loss coefficient curve of the antenna 40 when the electronic device 100 is in a free state; curve b and curve c represent the return loss coefficient curve of the antenna 40 when the electronic device 100 is held in a vertical position (such as Figure 5 The curve b represents the return loss coefficient curve of the antenna 40 when the electronic device 100 is in the left head and hand state (i.e. the left hand holds the electronic device 100, close to the left face); the curve c represents the return loss coefficient curve of the antenna 40 when the electronic device 100 is in the right head and hand state (i.e. the right hand holds the electronic device 100, close to the right face). Figure 7 for Figure 3 The diagram is a simulation diagram of the current and the radiation direction when the antenna 40 of the electronic device 100 is in a free state. Figure 8 Shown Figure 3 A radiation efficiency diagram of the antenna 40 of an exemplary structure of the electronic device 100 is shown. Figure 8The horizontal axis is frequency (in GHz), and the vertical axis is radiation efficiency (in dB). Curve a represents the radiation efficiency curve of antenna 40 when electronic device 100 is in a free state; curve b represents the radiation efficiency curve of antenna 40 when electronic device 100 is in a left head and hand state (i.e., holding electronic device 100 in the left hand, close to the left face); curve c represents the radiation efficiency curve of antenna 40 when electronic device 100 is in a right head and hand state (i.e., holding electronic device 100 in the right hand, close to the right face).

[0075] from Figure 6 and Figure 7 It can be easily seen that in the free state, antenna 40 has two antenna modes, which makes antenna 40 have a wider bandwidth. In addition, the directional patterns of the two antenna modes will complement each other in a certain space, so that antenna 40 can have good radiation efficiency in all directions, avoiding the situation where antenna 40 is held tightly when holding electronic device 100. In some embodiments, the complementary directional pattern is oblique, and the hand will not be completely held after holding, so the problem of holding tightly will not occur. In addition, from Figure 6 and Figure 8 It can also be seen that in the left-handed state and the right-handed state, the radiation performance of the antenna 40 is slightly reduced, but it is not completely locked. Figure 8 It can be seen that in the head-hand state (including the left head-hand state or the right head-hand state), the radiation efficiency of the antenna 40 in the free state decreases by about 5 dB, and still has good radiation efficiency.

[0076] In some embodiments, when the first end A of the antenna 40 is located on the second side 12 of the frame 10, the antenna 40 can still have good radiation performance in the free state and the head-hand state. Fig. 9 and Fig.10 , Fig. 9 1 is a graph of the return loss coefficient (S11) of an antenna 40 of an exemplary structure of another electronic device 100 of the present application. Fig. 9 The first end A of the antenna 40 is shown to be located on the second side 12 of the frame 10 of the electronic device 100 . Fig. 9The horizontal axis is the frequency (in GHz), and the vertical axis is the return loss coefficient (in dB). Curve a represents the return loss coefficient curve of the antenna 40 when the electronic device 100 is in a free state; curve b and curve c are curves showing the return loss coefficient curve of the antenna 40 when the electronic device 100 is held in the hand and the electronic device 100 is in a vertical screen state. Curve b represents the return loss coefficient curve of the antenna 40 when the electronic device 100 is in the left head and hand state (i.e., the left hand holds the electronic device 100, close to the left face); curve c represents the return loss coefficient curve of the antenna 40 when the electronic device 100 is in the right head and hand state (i.e., the right hand holds the electronic device 100, close to the right face). Fig.10 Shown Fig. 9 System efficiency diagram of the characterized antenna 40. Fig.10 The horizontal axis is frequency (in GHz), and the vertical axis is radiation efficiency (in dB).

[0077] from Fig. 9 and Fig.10 It can be seen that when the first end A is located at the second side 12 of the frame 10, the antenna 40 has two antenna modes in the free state, so that the antenna 40 has a wider bandwidth. In addition, in the left head-hand state and the right head-hand state, the radiation performance of the antenna 40 is slightly reduced, but it is not completely held, and the radiation efficiency of the antenna 40 in the head-hand state (including the left head-hand state or the right head-hand state) is reduced relative to the free state, but still has good radiation efficiency.

[0078] See also Figure 11 to Figure 12 , Fig.12 Shown Figure 3 The system efficiency diagram and radiation efficiency diagram of the antenna 40 of an exemplary structure of the electronic device 100 in the free state and the hand-held state are shown. Fig.11 In the horizontal screen state shown, the hand is holding the second side 12 of the electronic device 100. Fig.12The horizontal axis is frequency (in GHz), and the vertical axis is efficiency (in dB). Curve a represents the radiation efficiency curve of the antenna 40 when the electronic device 100 is in a free state; curve b represents the radiation efficiency curve of the antenna 40 when the electronic device 100 is in a horizontal screen state and the hand is held on the second side 12 of the electronic device 100; curve c represents the system efficiency curve of the antenna 40 when the electronic device 100 is in a free state; curve d represents the system efficiency curve of the antenna 40 when the electronic device 100 is in a horizontal screen state and the hand is held on the second side 12 of the electronic device 100. It can be seen from curve c and curve d that when the electronic device 100 is in a horizontal screen state, when the hand holds the two opposite second sides 12 of the electronic device 100, the antenna 40 will not be completely held. In addition, it can be seen from curve a and curve b that the radiation efficiency of the electronic device 100 in the hand-held state is reduced by about 5dB relative to the free state antenna 40, and still has good radiation efficiency.

[0079] For example, see Fig.13 , Fig.13 Shown Figure 3 The system efficiency diagram and radiation efficiency diagram of the antenna 40 of the electronic device 100 in different states are shown. Fig.13 The horizontal axis is frequency (in GHz), and the vertical axis is efficiency (in dB). Curve a represents the radiation efficiency curve of the antenna 40 when the electronic device 100 is in a free state; curve b represents the radiation efficiency curve of the antenna 40 when the electronic device 100 is held by a hand and the first slit 111 and the second slit 121 of the frame 10 are blocked; curve c represents the system efficiency curve of the antenna 40 when the electronic device 100 is in a free state; curve d represents the system efficiency curve of the antenna 40 when the electronic device 100 is held by a hand and the first slit 111 and the second slit 121 of the frame 10 are blocked. It can be seen from curve c and curve d that the antenna 40 will not be completely held when the electronic device 100 is held by a hand and the first slit 111 and the second slit 121 of the frame 10 are blocked. Furthermore, it can be seen from curve a and curve b that when the electronic device 100 is in the hand-held state and covers the first slit 111 and the second slit 121 of the frame 10 , the radiation efficiency of the antenna 40 decreases by about 7 dB relative to the free state, and still has good radiation efficiency.

[0080] See also Fig.14 , Fig.14 Schematic diagram of the structure of the antenna 40 according to some other embodiments of the present application. Fig.14 The embodiment shown and Figure 2The difference of the antenna 40 in the illustrated embodiment is that a third tuning element 45 is connected between the grounding point 414 of the antenna body 41 and the grounding position. In this embodiment, the third tuning element 45 can be a capacitor, an inductor, or a capacitor and an inductor arranged in parallel or in series. By connecting the third tuning element 45 between the grounding point 414 and the grounding position, the electrical length of the antenna body 41 between the first end A and the second end B, and the electrical length of the antenna body 41 between the feeding point 413 and the first end A or the second end B are changed, thereby adjusting the operating frequency of the antenna mode generated by the resonance of the antenna body 41. In this embodiment, the grounding position refers to the position where the grounding spring 44 is connected to one end of the middle frame 30.

[0081] In some embodiments of the present application, the antenna 40 further includes at least one switching circuit, which switches the antenna 40 to different operating frequency bands, so that the antenna 40 can achieve communication in multiple different operating frequency bands. Fig.15a , Fig.15a Schematic diagram of the structure of the antenna 40 according to some other embodiments of the present application. Fig.15a The embodiment shown and Figure 3The difference of the antenna 40 of the illustrated embodiment is that the antenna 40 also includes a first switching circuit 46. A first connection point 415 is provided on the antenna body 41, and the first connection point 415 is located on the side of the feeding point 413 and the grounding point 414 away from the first end A or on the side of the feeding point 413 and the grounding point 414 away from the second end B. It should be noted that the first connection point 415 in the present application is not an actual point, and the position where the first switching circuit 46 is connected to the antenna body 41 is the first connection point 415. The first switching circuit 46 includes a first switching switch 461 and at least one grounded first tuning element 462. The first tuning element 462 can be a capacitor, an inductor, or a capacitor or inductor connected in parallel or in series. Among them, at least one refers to one or more. The capacitor or inductor connected in parallel or in series means that the first tuning element 462 can be a plurality of capacitor elements arranged in series or in parallel, a plurality of capacitor elements connected in series or in parallel, or a capacitor element and an inductor element connected in series or in parallel. One end of the first switch 461 is connected to the first connection point 415, and the other end can be switchably connected to different first tuning elements 462, so that different first tuning elements 462 (which can be different types of first tuning elements 462, or the same type of first tuning elements 462 with different specifications and sizes) are connected to the antenna body 41. In this embodiment, the first connection point 415 is located on the side of the feeding point 413 and the grounding point 414 away from the second end B, so that the electrical length from the feeding point 413 to the first end A is changed, and the electrical length of the antenna body 41 (the electrical length between the first end A and the second end B) is changed, so as to change the resonant frequency of one quarter of the first wavelength and the resonant frequency of one half of the second wavelength, so that the antenna 10 can cover different working frequency bands. In some embodiments, the first connection point 415 may also be located on the side of the feeding point 413 and the grounding point 414 away from the first end A, thereby changing the electrical length from the feeding point 413 to the second end B, changing the electrical length from the first end A to the second end B, and further changing the resonant frequency of half the second wavelength.

[0082] The first switching switch 461 can be a switching switch of various types. For example, it can be a physical switch such as a single-pole single-throw switch, a single-pole multi-throw switch, or a multi-pole multi-throw switch, or it can be a switchable interface such as a mobile industry processor interface (MIPI) and a general-purpose input / output interface (GPIO). The first switching switch 461 includes a first movable end 461a and a plurality of first fixed ends 461b. One end of the first movable end 461a away from the first fixed end 461b is connected to the first connection point 415, and the other end can be switchably electrically connected to each first fixed end 461b. One end of the first tuning element 462 is connected to the first fixed end 461b, and the other end is grounded. When the first movable end 461a is switched to be connected to different first fixed ends 461b, different first tuning elements 462 are connected to the antenna body 41, thereby adjusting the electrical length of the antenna body 41, and changing the resonant frequency of one quarter of the first wavelength and the resonant frequency of one half of the second wavelength. Depending on the type of the first switch 461, the first movable end 511 of the first switch 461 may be one or more, and the size, type and quantity of the first resonant element 52 connected to the antenna body 41 can be changed by switching between different first movable ends 461a and different first fixed ends 461b. Fig.15a In the illustrated embodiment, the first switching switch 461 is a single-pole multi-throw switch, that is, the first fixed end 461b of the first switching switch 461 is multiple. Each first fixed end 461b is connected to a first tuning element 462, and different first fixed ends 461b are connected to different first tuning elements 462 (different types or different specifications and sizes), so that when the first movable end 461a of the first switching switch 461 is switched to a different first fixed end 461b, the antenna body 41 is connected to a different first tuning element 462, so that the electrical length of each section of the antenna body 41 (including the feeding point 413 to the first end A, the first end A to the second end B, etc.) changes, so that the antenna 40 can switch between different working frequency bands according to actual needs, so that the antenna 40 of the electronic device 100 can cover more working frequency bands. For example, Fig.15aThe first fixed ends 461b of the embodiment shown specifically have four, and the four first fixed ends 461b are respectively connected to inductors of different sizes and then grounded. When the first movable end 461a is switched from one first fixed end 461b to another first fixed end 461b, the electrical length between the feeding point 413 and the first end A will change, so that the frequency of the resonance of one quarter of the first wavelength generated between the feeding point 413 and the first end A changes, and at the same time, the electrical length between the first end A and the second end B changes, thereby changing the frequency of the resonance of one half of the second wavelength of the antenna 40.

[0083] See also Fig.15b , Fig.15b It is a structural schematic diagram of another antenna 40 of the present application. In this embodiment, the first switching switch 461 is a multi-pole multi-throw switch, and the number of the first movable ends 461a is the same as the number of the first fixed ends 461b. Specifically, in this embodiment, the number of the first movable ends 461a and the first fixed ends 461b are both four, and the first movable ends 461a correspond to the first fixed ends 461b one by one. One end of the four first movable ends 461a is connected to the first connection point 415, and the other end is connected or disconnected with the corresponding first fixed end 461b, so as to control the number of the first tuning elements 462 connected to the antenna body 41, so as to change the electrical length from the feeding point 413 of the antenna body 41 to the first end A and the overall electrical length from the first end A to the second end B, so as to change the resonant frequency of one quarter of the first wavelength and the resonant frequency of one half of the second wavelength. For example, when two first movable ends 461a are connected to the corresponding first fixed ends 461b and the other two first movable ends 461a are disconnected from the corresponding first fixed ends 461b, the number of first tuning elements 462 connected to the antenna body 41 is two, and the two first tuning elements 462 are arranged in parallel.

[0084] See also Fig.16 , Fig.16 Schematic diagram of the structure of the antenna 40 according to some other embodiments of the present application. Fig.16 The embodiment shown and Fig.15aThe difference between the illustrated embodiments is that the antenna 40 further includes a second switching circuit 47. A second connection point 416 is provided on the antenna body 41, and the second switching circuit 47 is connected to the second connection point 416. It should be noted that the second connection point 416 in the present application is not an actual point, and the position where the second switching circuit 47 is connected to the antenna body 41 is the second connection point 416. The feeding point 413 and the grounding point 414 are located between the first connection point 415 and the second connection point 416. Among them, the second switching circuit 47 has a structure similar to that of the first switching circuit 46, including a second switching switch 471 and a plurality of second tuning elements 472, and the second switching switch 471 can switch to connect different second tuning elements 472. The first switching circuit 46 cooperates with the second switching circuit 47 to change the operating frequency of the resonance of one quarter of the first wavelength and the resonance of one half of the second wavelength. Specifically, the first switching switch 461 of the first switching circuit 46 is switched so that different first tuning elements 462 are connected to the antenna body 41, and the second switching switch 471 of the second switching circuit 47 is switched to different second tuning elements 472, thereby changing the electrical length from the feeding point 413 to the first end A or the second end B and the electrical length from the first end A to the second end B, thereby changing the operating frequency of the resonance of one quarter of the first wavelength and the resonance of one half of the second wavelength, so that the antenna 40 can cover more operating frequency bands. In this embodiment, the second switching circuit 47 is located on the side of the feeding point 413 and the grounding point 414 away from the first end A, and the second switching switch 471 of the second switching circuit 47 is switched to different second tuning elements 472, thereby changing the electrical length from the feeding point 413 to the second end B and the electrical length from the first end A to the second end B, thereby changing the frequency of the resonance of one half of the second wavelength of the antenna 10 through the second switching circuit 47.

[0085] The second switching switch 471 can also be a physical switch such as a single-pole single-throw switch, a single-pole multi-throw switch, or a multi-pole multi-throw switch, or can also be a switchable interface such as a mobile industry processor interface (MIPI) or a general-purpose input / output interface (GPIO). In this embodiment, the second switching switch 471 is a single-pole multi-throw switch, including a second movable end 471a and a plurality of second fixed ends 471b. One end of each second tuning element 472 is connected to a corresponding second fixed end 471b, and the other end is grounded. One end of the second movable end 471a is connected to the second connection point 416, and the other end can be switchably connected to different second tuning elements 472.

[0086] In some embodiments, the second tuning elements 472 connected to each second fixed end 471b of the second switching circuit 47 correspond to the first tuning elements 462 of each first fixed end 461b of the first switching circuit 46. When the first switching switch 461 is switched to be connected to any first tuning element 462, the second switching switch 471 is switched to be connected to the second tuning element 472 corresponding to the first tuning element 462 connected to the first switching switch 461, thereby adjusting the electrical length of each section of the antenna 40 accordingly, so that the electrical length from the feeding point 413 to the first end A can always be greater than the electrical length from the feeding point 413 to the second end B, and ensure that the operating frequency of the resonance of one quarter of the first wavelength is less than the frequency of the resonance of one half of the second wavelength, and the difference between the frequency of the resonance of one quarter of the first wavelength and the frequency of the resonance of one half of the second wavelength is between 50MHz and 200MHz.

[0087] See also Fig.17 and Fig.18 , Fig.17 and Fig.18 The following are shown: Fig.16 The return loss diagram and the system efficiency and radiation efficiency diagrams when the first moving end 461a of the first switching switch 461 of the antenna 40 is switched and connected to three different first tuning elements 462 respectively, and the switching switch 62 is switched and connected to the second tuning element 472 corresponding to the first tuning element 462 connected to the first switching switch 461 accordingly. Fig.17 The horizontal axis is frequency (in GHz), and the vertical axis is return loss coefficient (in dB). Fig.18 The horizontal axis is frequency (in GHz), and the vertical axis is efficiency (in dB).

[0088] from Fig.17 It can be seen from the figure that by switching the first switch 461 and correspondingly switching the second switch 471, the antenna 40 can generate three return loss curves of different frequency bands. Specifically, Fig.17 Curve a, curve b, and curve c respectively represent the return loss curves of the antenna frequency bands B28 (703MHz to 803MHz), B5 (824MHz to 894MHz), and B8 (880MHz to 960MHz) generated by the antenna 40 when the electronic device 100 is in a free state. Fig.17It can be seen that by switching the first switching switch 461 and the second switching switch 471, the antenna 40 can resonate to produce different working frequency bands. Moreover, under different working frequency bands, the antenna 40 can produce two antenna modes (resonance of one quarter of the first wavelength and resonance of one half of the second wavelength), so that the antenna 40 can have high radiation performance in both the free state and the head-hand state. It can also be seen from the figure that by switching the first switching switch 461 and the second switching switch 471, and making the first tuning element 462 connected to the first switching switch 461 correspond to the second tuning element 472 connected to the second switching switch 471, the frequency of the resonance of one quarter of the first wavelength of the antenna 10 is always less than the frequency of the resonance of one half of the second wavelength, and the difference between the frequency of the resonance of one quarter of the first wavelength and the frequency of the resonance of one half of the second wavelength is between 50MHz and 200MHz. Fig.18 Curves a, b, and c respectively represent the radiation efficiency curves of antenna frequency bands B28 (703MHz to 803MHz), B5 (824MHz to 894MHz), and B8 (880MHz to 960MHz) generated by antenna 40 when electronic device 100 is in a free state, and curves d, e, and f respectively represent the system efficiency curves of antenna frequency bands B28, B5, and B8 generated by antenna 40. Fig.18 It can be seen that the 80 MHz bandwidth of the antenna 40 in different operating frequency bands (including B28, B5, and B8) is within -6 dB, and has good radiation performance.

[0089] In this embodiment, the first switching circuit 46 and the first switching switch 461 of the second switching circuit 47 are both single-pole four-throw switches, so that the antenna 40 can achieve coverage of four different operating frequencies. It is understandable that, according to actual needs, by increasing the number of switching circuits, using different first switching switches 461 and second switching switches 471, etc., the antenna 40 can achieve coverage of more operating frequency bands. For example, in some embodiments, the first switching circuit 46 and the first switching circuit 47 are both multi-pole four-throw switches, so that the antenna 40 can cover 2 4 coverage of various operating frequencies.

[0090] The above is a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. An electronic device, comprising an antenna, characterized in that: The antenna comprises an L-shaped antenna body, the antenna body comprises a first section and a second section intersecting the first section; the antenna body comprises a feeding point and a grounding point arranged at intervals, the feeding point is used to connect to a radio frequency front end, and the grounding point is used to ground; The antenna body includes a first end and a second end that are opposite to each other, the first end is an end of the first section away from the second section, and the second end is an end of the second section away from the first section; the physical length from the feeding point to the first end is greater than the physical length from the feeding point to the second end, the antenna body generates a resonance of one quarter of a first wavelength between the feeding point and the first end, and the antenna body generates a resonance of one half of a second wavelength between the first end and the second end, the first wavelength is greater than the second wavelength, and the difference between the frequency of the resonance generated between the feeding point and the first end and the frequency of the resonance generated between the first end and the second end is between 50MHz and 200MHz.

2. An electronic device, comprising an antenna, characterized in that: The antenna comprises an L-shaped antenna body, the antenna body comprises a first section and a second section intersecting the first section; the antenna body comprises a feeding point and a grounding point arranged at intervals, the feeding point is used to connect to a radio frequency front end, and the grounding point is used to ground; The antenna body includes a first end and a second end that are opposite to each other, the first end is an end of the first section away from the second section, and the second end is an end of the second section away from the first section; the physical length from the feeding point to the first end is greater than the physical length from the feeding point to the second end, the antenna body generates a resonance of one quarter of the first wavelength between the feeding point and the first end, the antenna body generates a resonance of one half of the second wavelength between the first end and the second end, the first wavelength is greater than the second wavelength, and the second resonance of one half the wavelength is used to enhance the mode excitation generated by the first resonance of the quarter wavelength.

3. The electronic device according to claim 2, characterized in that: A difference between a frequency of resonance generated between the feeding point and the first end and a frequency of resonance generated between the first end and the second end is between 50 MHz and 200 MHz.

4. The electronic device according to claim 1 or 2, characterized in that: The antenna includes a first switching circuit, a first connection point is provided on the antenna body, and the first connection point is located on the side of the feeding point and the grounding point away from the second end; one end of the first switching circuit is connected to the first connection point, and the other end is grounded; the first switching circuit is used to change the electrical length from the feeding point to the first end.

5. The electronic device according to claim 4, characterized in that: The antenna includes a second switching circuit, and a second connection point is also provided on the antenna body. The feeding point and the grounding point are located between the first connection point and the second connection point; one end of the second switching circuit is connected to the second connection point, and the other end is grounded; the second switching circuit is used to change the electrical length from the feeding point to the second end.

6. The electronic device according to claim 4 or 5, characterized in that: The first switching circuit includes a first switching switch and a plurality of different first tuning elements connected to ground. The first switching switch can switchably connect different first tuning elements to change the electrical length from the feeding point to the first end.

7. The electronic device according to claim 5, characterized in that: The first switching circuit includes a first switching switch and a plurality of different first tuning elements connected to the ground, the second switching circuit includes a second switching switch and a plurality of different second tuning elements connected to the ground, and the plurality of first tuning elements correspond to the plurality of second tuning elements in a one-to-one manner; When the first switch is switchably connected to different first tuning elements, the second switch is switchably connected to a second tuning element corresponding to the first tuning element connected to the first switch.

8. The electronic device according to claim 7, characterized in that: The first switch includes a plurality of first fixed ends and a first movable end switchably connected to the plurality of first fixed ends, the first movable end is connected to the first connection point, and each of the first fixed ends is connected to one of the first tuning elements; The second switch includes a plurality of second fixed ends and a second movable end switchably connected to the plurality of second fixed ends, the second movable end is connected to the second connection point, and each of the second fixed ends is connected to one of the second tuning elements.

9. The electronic device according to claim 7 or 8, characterized in that: The first tuning element or the second tuning element is any one or more of a capacitor, an inductor, and a resistor connected in parallel or in series.

10. The electronic device according to claim 1 or 2, characterized in that: A third tuning element is connected between the grounding point and a grounding position of the grounding point, and the third tuning element is used to adjust the electrical length of the antenna body.

11. The electronic device according to claim 1 or 2, characterized in that: The electronic device further comprises a conductive frame and a radio frequency front end, the frame comprises a first side and a second side intersecting the first side, a first slit is provided on the first side, a second slit is provided on the second side, a portion of the frame between the first slit and the second slit forms the antenna body of the antenna, a section of the frame between the first slit and the second side is a first section of the antenna body, and a section of the frame between the second slit and the first side is a second section of the antenna body; The RF front end is connected to the feeding point of the antenna body and is used to feed RF signals into the antenna body or receive RF signals transmitted from the antenna body.

12. The electronic device according to claim 11, characterized in that: The length of the first side is greater than the length of the second side, and the distance from the first gap to the second side is greater than the distance from the second gap to the first side.

13. The electronic device according to claim 11 or 12, characterized in that: The distance from the first gap to the second edge is greater than or equal to 90 mm.

14. The electronic device according to claim 1 or 2, characterized in that: The electronic device further comprises an insulating frame and a radio frequency front end, the frame comprises a first side and a second side intersecting the first side, the first section of the antenna is arranged close to the first side, and the second section of the antenna is arranged close to the second side; The RF front end is connected to the feeding point of the antenna body and is used to feed RF signals into the antenna body or receive RF signals transmitted from the antenna body.

15. The electronic device according to claim 11 or 14, characterized in that: The feeding point is located on the first side.

16. The electronic device according to claim 1 or 2, characterized in that: When the antenna body generates resonance of one quarter of the first wavelength between the feeding point and the first end, the current on the antenna body is in opposite directions on both sides of the feeding point; when the antenna body generates resonance of one half of the second wavelength between the first end and the second end, the current on the antenna body is in the same direction on both sides of the feeding point.

17. The electronic device according to claim 1 or 2, characterized in that: The resonant frequency of the quarter first wavelength is between 699 MHz and 960 MHz.

18. The electronic device according to claim 1 or 2, characterized in that: The resonance directivity diagram of the quarter of the first wavelength and the resonance directivity diagram of the half of the second wavelength are complementary.

19. The electronic device according to claim 1 or 2, characterized in that: The antenna body is not provided with a gap.

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