Electronic equipment

Abstract

The invention provides electronic equipment. The electronic equipment comprises an antenna. The antenna uses a conductive part of a frame of an electronic device as a radiator. An electric signal is fed into the radiator in an indirect coupling mode, and the antenna can generate first resonance and second resonance. According to the antenna, the two resonances can form a resonance frequency band to expand the bandwidth, and in the resonance frequency band, the antenna has good radiation efficiency and system efficiency, so that the electronic equipment has good communication performance.

Description

Technical Field

[0001] The present application relates to the field of wireless communications, and in particular to an electronic device. Background Art

[0002] As people's demand for high-speed data transmission increases, the development trend of industrial design (ID) of electronic devices is large screen ratio and multiple cameras. This has led to a significant reduction in antenna clearance and increasingly limited layout space.

[0003] Under the current circumstances, the communication frequency bands of electronic devices will continue to coexist with the third generation of mobile communication technology (3G), the fourth generation of mobile communication technology (4G), and the fifth generation of mobile communication technology (5G), and more and more antennas are required.

[0004] However, the traditional method of expanding the efficiency bandwidth of the antenna by increasing the size of the antenna radiator has reached a bottleneck. Therefore, it is imperative to improve the efficiency bandwidth of the antenna while keeping the size of the radiator unchanged. Summary of the invention

[0005] The present application provides an electronic device, including an antenna. The antenna uses the conductive part of the frame of the electronic device as a radiator. The antenna can generate a first resonance and a second resonance by feeding an electrical signal to the radiator in an indirect coupling manner. The two resonances can jointly form a resonant frequency band to expand the bandwidth, and the antenna has good radiation efficiency and system efficiency in the resonant frequency band.

[0006] In a first aspect, an electronic device is provided, comprising: a floor; a frame, at least a portion of the frame is spaced apart from the floor, the frame comprises a first position, a second position and a third position arranged in sequence, the frame has a first slit and a second slit respectively at the first position and the second position, and the frame is coupled to the floor at the third position; an antenna, the antenna comprising: a first radiator and a second radiator, the first radiator comprises a conductive portion of the frame between the first position and the second position, the second radiator comprises a conductive portion of the frame between the second position and the third position, a length L1 of the first radiator and a length L2 of the second radiator satisfying: L1<1.5×L2, and L2<1.5×L1; a first electronic component and a second electronic component , the first end of the first radiator includes a first connection point and a second connection point, the first end of the second radiator includes a third connection point, the first end of the first electronic component is coupled to the first connection point, the second end of the first electronic component is coupled to the floor, the first end of the second electronic component is coupled to the second connection point, the second end of the second electronic component is coupled to the third connection point, the first end of the first radiator and the first end of the second radiator are opposite to each other and do not contact each other; a feeding circuit, the first end of the second radiator includes a feeding point, and the feeding circuit is coupled to the feeding point; wherein the first radiator and the second radiator are used to generate a first resonance and a second resonance, and the first resonance and the second resonance are used to jointly support a first working frequency band of the electronic device.

[0007] According to the embodiment of the present application, by setting the lengths of the first radiator 210 and the second radiator 220 , the first resonance and the second resonance generated by the two radiators can jointly support the first operating frequency band of the electronic device 10 .

[0008] According to the embodiment of the present application, the first resonance and the second resonance can both be regarded as being generated by the slot CM mode. Since the slot CM mode has higher radiation efficiency and system efficiency, the antenna has better radiation efficiency and system efficiency within the working frequency band formed by the first resonance and the second resonance.

[0009] In combination with the first aspect, in some implementations of the first aspect, the antenna also includes a third electronic element; the second end of the first radiator includes a fourth connection point, the first end of the third electronic element is coupled to the fourth connection point, and the second end of the third electronic element is coupled to the floor.

[0010] According to the embodiment of the present application, the third electronic component can be used to simultaneously determine the radiation characteristics (for example, the resonance point frequency of the resonance) when the antenna generates the first resonance and the second resonance.

[0011] At the same time, the third electronic component can also be used to adjust the balance between the first radiator and the second radiator when the antenna resonates. The balance between the first radiator and the second radiator can be understood as reducing the difference between the intensity of the electric field (intensity of the current) generated by the first radiator and the intensity of the electric field (intensity of the current) generated by the second radiator when the antenna resonates, so that when the user holds the electronic device in the left hand or the right hand, the impact on the radiation characteristics of the antenna is roughly the same, and the radiation characteristics of the antenna will not differ greatly due to different holding postures of the user.

[0012] In combination with the first aspect, in some implementations of the first aspect, the first connection point coincides with the second connection point, and / or the third connection point coincides with the feeding point.

[0013] In combination with the first aspect, in some implementations of the first aspect, the first electronic component is a capacitive component, based on the center frequency of the first frequency band being less than or equal to 1 GHz, the equivalent capacitance value of the first electronic component is greater than 3 pF and less than or equal to 5 pF, based on the center frequency of the first frequency band being greater than 1 GHz and less than or equal to 3 GHz, the equivalent capacitance value of the first electronic component is greater than 0.5 pF and less than or equal to 3 pF, based on the center frequency of the first frequency band being greater than 3 GHz, the equivalent capacitance value of the first electronic component is less than or equal to 0.5 pF, or, the first electronic component is an inductive component, and the equivalent inductance value of the first electronic component is less than or equal to 3 nH.

[0014] In combination with the first aspect, in some implementations of the first aspect, the second electronic component is a capacitive component, based on the center frequency of the first operating frequency band being less than or equal to 1 GHz, the equivalent capacitance value of the second electronic component is greater than 1.5 pF and less than or equal to 2 pF, based on the center frequency of the first operating frequency band being greater than 1 GHz and less than or equal to 3 GHz, the equivalent capacitance value of the second electronic component is greater than 0.5 pF and less than or equal to 1.5 pF, and based on the center frequency of the first operating frequency band being greater than 3 GHz, the equivalent capacitance value of the second electronic component is less than or equal to 0.5 pF.

[0015] According to an embodiment of the present application, the first electronic component can be used to adjust the grounding state of the first end of the first radiator, so as to determine the radiation characteristics (e.g., the resonance point frequency of the resonance) when the antenna generates the first resonance. The second electronic component can be used to determine the radiation characteristics (e.g., the resonance point frequency of the resonance) when the antenna generates the second resonance.

[0016] In combination with the first aspect, in certain implementations of the first aspect, the first position and the second position are located on a first side of the border; the length of the border between the first position and the center position of the first side is the same as the length of the border between the second position and the center position of the first side.

[0017] It should be understood that the symmetry between the first position (first slot) and the second position (second slot) (for example, symmetry along the center position of the first side) can increase the symmetry of the antenna, thereby improving the radiation characteristics of the antenna (for example, operating bandwidth).

[0018] In combination with the first aspect, in some implementations of the first aspect, the electronic device also includes a charging interface; the first side is a bottom side of the electronic device, and a portion of the charging interface is located between the first position and the second position.

[0019] According to the embodiment of the present application, when the charging interface is charging, a strong current will be generated near the charging interface. Since part of the charging interface is located on the first radiator and the feeding point of the antenna is located on the second radiator, the charging interface 260 has little effect on the radiation characteristics of the antenna when charging.

[0020] In combination with the first aspect, in some implementations of the first aspect, the first operating frequency band includes at least a frequency band of 1710 MHz-2170 MHz, and / or, 2300 MHz-2690 MHz.

[0021] In combination with the first aspect, in certain implementations of the first aspect, based on the fact that the first operating frequency band includes at least a frequency band of 1710 MHz-2170 MHz, the frequency difference between the resonance point frequency of the first resonance and the resonance point frequency of the second resonance is greater than or equal to 150 MHz and less than or equal to 240 MHz; based on the fact that the first operating frequency band includes at least a frequency band of 2300 MHz-2690 MHz, the frequency difference between the resonance point frequency of the first resonance and the resonance point frequency of the second resonance is greater than or equal to 200 MHz and less than or equal to 300 MHz.

[0022] In combination with the first aspect, in some implementations of the first aspect, the first electronic component includes a first switch and a plurality of first capacitors; wherein the first switch and the first capacitors are connected in series and coupled between the first connection point and the floor.

[0023] In combination with the first aspect, in some implementations of the first aspect, the second electronic component includes a second switch and a plurality of second capacitors; wherein the second switch and the second capacitors are connected in series and coupled between the second connection point and the third connection point.

[0024] In combination with the first aspect, in some implementations of the first aspect, at the resonance point of the first resonance, the current on the first radiator and the current on the second radiator are in the same direction; at the resonance point of the second resonance, the current on the first radiator and the current on the second radiator are in the same direction.

[0025] In combination with the first aspect, in certain implementations of the first aspect, at the resonance point of the first resonance, the intensity of the current on the first radiator is greater than the intensity of the current on the second radiator; at the resonance point of the second resonance, the intensity of the current on the first radiator is less than the intensity of the current on the second radiator.

[0026] According to an embodiment of the present application, the first resonance is performed by the first radiator as the main radiator (the current on the first radiator or the electric field generated is relatively strong), and the second resonance is performed by the second radiator as the main radiator (the current on the second radiator or the electric field generated is relatively strong).

[0027] In combination with the first aspect, in some implementations of the first aspect, an equivalent capacitance value of the third electronic component is less than or equal to 1 pF.

[0028] In combination with the first aspect, in some implementations of the first aspect, the length L1 of the first radiator and the length L2 of the second radiator satisfy: L1×80%≤L2≤L1×120%. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of an electronic device 10 provided in an embodiment of the present application.

[0030] Figure 2 It is the structure of the common mode mode of the antenna provided in this application and the corresponding distribution diagram of current, electric field and magnetic current.

[0031] Figure 3 It is the structure of the differential mode of the antenna provided by this application and the corresponding distribution diagram of current, electric field and magnetic current.

[0032] Figure 4 It is a schematic diagram of an antenna 200 provided in an embodiment of the present application.

[0033] Figure 5 yes Figure 4 The diagram shows the current distribution of the antenna 200 at the first resonance.

[0034] Figure 6 yes Figure 4 The current distribution diagram of the antenna 200 at the second resonance is shown.

[0035] Figure 7 yes Figure 4The simulation results of the S parameters, radiation efficiency and system efficiency of the antenna 200 are shown.

[0036] Figure 8 It is a schematic diagram of another electronic device 10 provided in an embodiment of the present application.

[0037] Fig. 9 It is a schematic diagram of another electronic device 10 provided in an embodiment of the present application.

[0038] Fig.10 It is a schematic diagram of another electronic device 10 provided in an embodiment of the present application.

[0039] Fig.11 It is a schematic diagram of another electronic device 10 provided in an embodiment of the present application.

[0040] Fig.12 yes Fig.10 The S-parameter simulation results of the antenna 200 in the electronic device 10 are shown.

[0041] Fig.13 yes Fig.10 The radiation efficiency simulation results of the antenna 200 in the electronic device 10 are shown.

[0042] Fig.14 yes Fig.10 The diagram shows the current distribution of the antenna 200 in the electronic device 10 at the resonance point of the first resonance (eg, 2.65 GHz).

[0043] Fig.15 yes Fig.10 The diagram shows the current distribution of the antenna 200 in the electronic device 10 at the second resonance point (eg, 1.95 GHz).

[0044] Fig.16 yes Figure 4 The simulation results of the electric field distribution of the antenna 200 are shown.

[0045] Fig.17 yes Figure 8 The simulation results of the electric field distribution of the antenna 200 are shown.

[0046] Fig.18 yes Figure 4 The simulation results of the magnetic field distribution of the antenna 200 are shown.

[0047] Fig.19 yes Figure 8 The simulation results of the magnetic field distribution of the antenna 200 are shown. DETAILED DESCRIPTION

[0048] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0049] It should be understood that the term "and / or" used in this article is only a description of the same field of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0050] When used in this application, “within the range of…”, unless it is separately specified that an end value is not included, it is assumed that both end values ​​of the range are included. For example, in the range of 1 to 5, the two values ​​1 and 5 are included.

[0051] Coupling: can be understood as direct coupling and / or indirect coupling, and "coupled connection" can be understood as direct coupling connection and / or indirect coupling connection. Direct coupling can also be called "electrical connection", which is understood as the physical contact and electrical conduction between components; it can also be understood as the connection between different components in the circuit structure through physical lines such as printed circuit board (PCB) copper foil or wires that can transmit electrical signals; "indirect coupling" can be understood as two conductors being electrically conductive in an airless / non-contact manner. In one embodiment, indirect coupling can also be called capacitive coupling, for example, signal transmission is achieved by coupling between the gaps between two conductive parts to form an equivalent capacitor.

[0052] Component / device: includes at least one of lumped component / device and distributed component / device.

[0053] Lumped component / device: refers to the collective name for all components when the size of the component is much smaller than the wavelength relative to the circuit operating frequency. For the signal, regardless of any time, the component characteristics always remain fixed and are independent of frequency.

[0054] Distributed components / devices: Unlike lumped components, if the size of the component is similar to or larger than the wavelength relative to the circuit operating frequency, then when the signal passes through the component, the characteristics of each point of the component itself will vary due to changes in the signal. At this time, the component as a whole cannot be regarded as a single entity with fixed characteristics, but should be called a distributed component.

[0055] Capacitance: It can be understood as lumped capacitance and / or distributed capacitance. Lumped capacitance refers to capacitive components, such as capacitors; distributed capacitance (or distributed capacitance) refers to the equivalent capacitance formed by two conductive parts separated by a certain gap.

[0056] Inductance: It can be understood as lumped inductance and / or distributed inductance. Lumped inductance refers to inductive components, such as inductors; distributed inductance (or distributed inductance) refers to the equivalent inductance formed by a certain length of conductive parts.

[0057] Radiator: It is a device in the antenna used to receive / send electromagnetic wave radiation. In some cases, the "antenna" in a narrow sense is understood as a radiator, which converts the waveguide energy from the transmitter into radio waves, or converts radio waves into waveguide energy, which is used to radiate and receive radio waves. The modulated high-frequency current energy (or waveguide energy) generated by the transmitter is transmitted to the transmitting radiator via the feeder line, and is converted into a certain polarized electromagnetic wave energy by the radiator and radiated in the desired direction. The receiving radiator converts a certain polarized electromagnetic wave energy from a specific direction in space into modulated high-frequency current energy, which is transmitted to the receiver input via the feeder line.

[0058] The radiator may include a conductor with a specific shape and size, such as a linear or sheet shape, etc., and the present application does not limit the specific shape. In one embodiment, the linear radiator may be referred to as a linear antenna. In one embodiment, the linear radiator may be implemented by a conductive frame, and may also be referred to as a frame antenna. In one embodiment, the linear radiator may be implemented by a bracket conductor, and may also be referred to as a bracket antenna. In one embodiment, the linear radiator, or the radiator of the linear antenna, has a wire diameter (e.g., including thickness and width) much smaller than the wavelength (e.g., the dielectric wavelength) (e.g., less than 1 / 16 of the wavelength), and the length may be comparable to the wavelength (e.g., the dielectric wavelength) (e.g., the length is about 1 / 8 of the wavelength, or 1 / 8 to 1 / 4, or 1 / 4 to 1 / 2, or longer). The main forms of linear antennas include dipole antennas, half-wave dipole antennas, monopole antennas, loop antennas, and inverted F antennas (also known as IFA, Inverted F Antenna). For example, for a dipole antenna, each dipole antenna generally includes two radiating branches, and each branch is fed by a feeding unit from the feeding end of the radiating branch. For example, an inverted-F antenna (IFA) can be regarded as a monopole antenna with a ground path added. The IFA antenna has a feeding point and a grounding point, and is called an inverted-F antenna because its side view is an inverted F shape. In one embodiment, the sheet radiator may include a microstrip antenna, or a patch antenna, such as a planar inverted F antenna (also known as PIFA, Planar Inverted FAntenna). In one embodiment, the sheet radiator may be implemented by a planar conductor (such as a conductive sheet or a conductive coating, etc.). In one embodiment, the sheet radiator may include a conductive sheet, such as a copper sheet, etc. In one embodiment, the sheet radiator may include a conductive coating, such as a silver paste, etc. The shape of the sheet radiator includes a circle, a rectangle, a ring, etc., and the present application does not limit the specific shape. The structure of the microstrip antenna is generally composed of a dielectric substrate, a radiator and a floor, wherein the dielectric substrate is arranged between the radiator and the floor.

[0059] The radiator may also include a slot or a slit formed on the conductor, for example, a closed or semi-closed slot or slit formed on a grounded conductor surface. In one embodiment, a slotted or slitted radiator may be referred to as a slot antenna or a slot antenna. In one embodiment, the radial dimension (e.g., including the width) of the slot or slit of the slot antenna / slot antenna is much smaller than the wavelength (e.g., the dielectric wavelength) (e.g., less than 1 / 16 of the wavelength), and the length dimension may be comparable to the wavelength (e.g., the dielectric wavelength) (e.g., the length is about 1 / 8 of the wavelength, or 1 / 8 to 1 / 4, or 1 / 4 to 1 / 2, or longer). In one embodiment, a radiator with a closed slot or slit may be referred to as a closed slot antenna. In one embodiment, a radiator with a semi-closed slot or slit (e.g., an opening is added to a closed slot or slit) may be referred to as an open slot antenna. In some embodiments, the slot shape is a long strip. In some embodiments, the length of the slot is about half a wavelength (e.g., the dielectric wavelength). In some embodiments, the length of the slot is about an integer multiple of the wavelength (e.g., one times the dielectric wavelength). In some embodiments, the slot can be fed by a transmission line connected across one or both sides thereof, thereby exciting a radio frequency electromagnetic field on the slot and radiating electromagnetic waves into space. In one embodiment, the radiator of the slot antenna or slot antenna can be realized by a conductive frame with both ends grounded, which can also be called a frame antenna; in this embodiment, it can be regarded as that the slot antenna or slot antenna includes a linear radiator, which is spaced apart from the floor and grounded at both ends of the radiator, thereby forming a closed or semi-closed slot or slot. In one embodiment, the radiator of the slot antenna or slot antenna can be realized by a bracket conductor with both ends grounded, which can also be called a bracket antenna.

[0060] The feed circuit is a combination of all circuits used for receiving and transmitting radio frequency signals. The feed circuit may include a transceiver and an RF front end circuit. In some cases, the "feed circuit" is understood in a narrow sense as a radio frequency chip (RFIC, radio frequency integrated circuit), and RFIC can be considered to include a radio frequency front end chip and a transceiver. The feed circuit has the function of converting radio waves (e.g., radio frequency signals) and electrical signals (e.g., digital signals). Generally, it is considered to be part of the radio frequency.

[0061] In some embodiments, the electronic device may further include a test socket (or referred to as a radio frequency socket or a radio frequency test socket). The test socket may be used to insert a coaxial cable to test the characteristics of the radio frequency front-end circuit or the radiator of the antenna through the cable. The radio frequency front-end circuit may be considered as a circuit portion coupled between the test socket and the transceiver.

[0062] In some embodiments, the RF front-end circuit may be integrated into a RF front-end chip in the electronic device, or the RF front-end circuit and the transceiver may be integrated into a RF chip in the electronic device.

[0063] It should be understood that any two of the first / second / …Nth feeding circuits in the present application can share the same transceiver, for example, transmitting signals through a RF channel in a transceiver (for example, a port (pin) of a RF chip); they can also share a RF front-end circuit, for example, processing signals through a switch or amplifier in a RF front-end.

[0064] It should also be understood that two feeding circuits in the first / second / ...Nth feeding circuits in the present application usually correspond to two radio frequency test sockets in the electronic device.

[0065] The matching circuit is a circuit used to adjust the radiation characteristics of the antenna. In one embodiment, the matching circuit is coupled between the feed circuit and the corresponding radiator. In one embodiment, the matching circuit is coupled between the test socket and the radiator. Generally, the matching circuit is a combination of circuits coupled between the radiator and the floor. In one embodiment, the matching circuit may include a switch and / or an electronic component, and the switch may be an electronic component for switching the coupling connection of the radiator. The matching circuit has the function of impedance matching and / or frequency tuning. Generally, it is considered to be a part of the antenna.

[0066] The grounding structure / feeding structure may include a connector, such as a metal spring, and the radiator is coupled to the floor through the grounding structure / feeding structure is coupled to the feeding circuit. In some embodiments, the feeding structure may include a transmission line / feeding line, and the grounding structure may include a grounding line.

[0067] End / point: The "end / point" in the first end / second end / feeding end / grounding end / feeding point / grounding point / connection point of the antenna radiator cannot be narrowly understood as an end point or end portion that is physically disconnected from other radiators, but can also be considered as a point or a section on a continuous radiator. In one embodiment, the "end / point" may include a connection / coupling area on the antenna radiator that is coupled to other conductive structures. For example, the feed end / feeding point may be a coupling area on the antenna radiator that is coupled to the feed structure (for example, an area facing a portion of the feed structure). For another example, the ground end / grounding point may be a connection / coupling area on the antenna radiator that is coupled to the ground structure.

[0068] Open end, closed end: In some embodiments, the open end and the closed end are, for example, relative to whether they are grounded. The closed end is grounded, and the open end is not grounded. In some embodiments, the open end and the closed end are, for example, relative to other conductors. The closed end is electrically connected to other conductors, and the open end is not electrically connected to other conductors. In one embodiment, the open end can also be referred to as a suspended end, a free end, an open end, or an open-circuit end. In one embodiment, the closed end can also be referred to as a grounded end or a short-circuit end. It should be understood that in some embodiments, other conductors can be coupled and connected through the open end to transfer coupling energy (which can be understood as transferring current).

[0069] In some embodiments, the "closed end" can also be understood from the perspective of current distribution. The closed end or the grounded end, etc., can be understood as a point with larger current on the radiator, or as a point with smaller electric field on the radiator. In one embodiment, the current distribution characteristics of larger current / small electric field can be maintained by coupling electronic devices (for example, capacitors, inductors, etc.) through the closed end. In one embodiment, the current distribution characteristics of larger current / small electric field can be maintained by opening a gap at or near the closed end (for example, a gap filled with insulating material).

[0070] In some embodiments, the "open end" can also be understood from the perspective of current distribution. The open end or suspended end, etc., can be understood as a point with smaller current on the radiator, or as a point with larger electric field on the radiator. In one embodiment, coupling electronic devices (for example, capacitors, inductors, etc.) through the open end can maintain the current distribution characteristics of the smaller current point / larger electric field point.

[0071] It should be understood that coupling the radiator end at a gap (from the perspective of the structure of the radiator, it is similar to a radiator at an opening of an open end or a suspended end) with electronic devices (for example, capacitors, inductors, etc.) can make the radiator end a point with larger current / smaller electric field. In this case, it should be understood that the radiator end at the gap is actually a closed end or a grounded end, etc.

[0072] The “suspended radiator” mentioned in the embodiments of the present application means that the radiator is not directly connected to the feeder line / feeder branch and / or the grounding line / grounding branch, but is fed and / or grounded through indirect coupling.

[0073] It should be understood that the "suspended" in "suspended end" or "suspended radiator" does not mean that there is no structure around the radiator to support it. In one embodiment, the suspended radiator can be, for example, a radiator disposed on the inner surface of the insulating back cover.

[0074] Clearance: refers to the distance between the radiator of the antenna and the metal or electronic components close to the radiator. For example, when part of the metal frame of the electronic device acts as the radiator of the antenna, the clearance can refer to the distance between the radiator and the printed circuit board or electronic components (such as cameras).

[0075] The current same direction / reverse direction mentioned in the embodiments of the present application should be understood as the direction of the main current on the conductor on the same side is the same direction / reverse direction. For example, when stimulating a distributed current in the same direction on a conductor that is bent or annular (for example, the current path is also bent or annular), it should be understood that, for example, the main current stimulating on the conductors on both sides of the annular conductor (for example, a conductor surrounding a gap, on the conductors on both sides of the gap) is opposite in direction, but it still belongs to the definition of the distributed current in the same direction in the embodiments of the present application. In one embodiment, the current same direction on a conductor may refer to the current on the conductor having no reverse point. In one embodiment, the current reverse on a conductor may refer to the current on the conductor having at least one reverse point. In one embodiment, the current same direction on two conductors may refer to the current on both conductors having no reverse point and flowing in the same direction. In one embodiment, the current reverse on two conductors may refer to the current on both conductors having no reverse point and flowing in opposite directions. The current same direction / reverse direction on multiple conductors can be understood accordingly.

[0076] The electric field in the same direction / reverse direction mentioned in the embodiments of the present application should be understood as the direction of the main electric field (for example, the electric field between the conductor and the floor) generated by the conductor in the space is in the same direction / reverse direction. For example, when a unidirectional distributed electric field is excited on a bent or ring-shaped conductor (for example, the gap formed between the floor and the conductor is also bent or ring-shaped), it should be understood that, for example, the direction of the electric field in the gap is from the floor to the conductor, or from the conductor to the floor. Although the main electric field excited in the gaps on both sides of the ring-shaped conductor (for example, a conductor surrounding a gap, in the gaps on both sides of the gap) is reversed in direction, it still belongs to the definition of the unidirectional distributed electric field in the embodiments of the present application. In one embodiment, the electric field in the same direction between a conductor and the floor can refer to the electric field between the conductor and the floor having no reverse point. In one embodiment, the electric field in the reverse direction between a conductor and the floor can refer to the electric field between the conductor and the floor having at least one reverse point. In one embodiment, the electric field in the same direction between two conductors and the floor can refer to the electric fields between the two conductors and the floor having no reverse point and radiating in the same direction (for example, the positive direction of the z-axis). In one embodiment, the electric field reversal between two conductors and the floor may mean that the electric fields between the two conductors and the floor have no reversal points and flow in opposite directions. The electric fields between multiple conductors and the floor may be understood to be in the same direction / opposite direction accordingly.

[0077] Resonance / resonance frequency: The resonance frequency is also called the resonance frequency. The resonance frequency can have a frequency range, that is, the frequency range in which resonance occurs. The frequency corresponding to the strongest resonance point is the center frequency point frequency. The return loss characteristic of the center frequency can be less than -20dB. It should be understood that, unless otherwise specified, the antenna / radiator mentioned in this application produces a "first / second... resonance", where the first resonance should be the fundamental mode resonance generated by the antenna / radiator, or in other words, the lowest frequency resonance generated by the antenna / radiator. It should be understood that the antenna / radiator can generate one or more antenna modes according to the specific design, and each antenna mode can correspond to a fundamental mode resonance.

[0078] Resonant frequency band: The range of the resonant frequency is the resonant frequency band. The return loss characteristic of any frequency point in the resonant frequency band can be less than -6dB or -5dB.

[0079] Communication frequency band / working frequency band: Regardless of the type of antenna, it always works within a certain frequency range (band width). For example, an antenna that supports the B40 frequency band has a working frequency band that includes frequencies in the range of 2300MHz to 2400MHz, or in other words, the working frequency band of the antenna includes the B40 frequency band. The frequency range that meets the index requirements can be regarded as the working frequency band of the antenna.

[0080] The resonant frequency band and the operating frequency band may be the same, or may partially overlap. In one embodiment, one or more resonant frequency bands of the antenna may cover one or more operating frequency bands of the antenna.

[0081] Electrical length: It can refer to the ratio of physical length (i.e. mechanical length or geometric length) to the wavelength of the transmitted electromagnetic wave. The electrical length can satisfy the following formula:

[0082]

[0083] Where L is the physical length and λ is the wavelength of the electromagnetic wave.

[0084] Wavelength: or operating wavelength, which can be the wavelength corresponding to the center frequency of the resonant frequency or the center frequency of the operating frequency band supported by the antenna. For example, assuming that the center frequency of the B1 uplink frequency band (resonant frequency is 1920MHz to 1980MHz) is 1955MHz, then the operating wavelength can be the wavelength calculated using the frequency of 1955MHz. Not limited to the center frequency, "operating wavelength" can also refer to the wavelength corresponding to the non-center frequency of the resonant frequency or the operating frequency band.

[0085] It should be understood that the wavelength of the radiation signal in the air can be calculated as follows: (wavelength in air, or wavelength in vacuum) = speed of light / frequency, where frequency is the frequency of the radiation signal (MHz), and the speed of light can be taken as 3×108 m / s. The wavelength of the radiation signal in the medium can be calculated as follows: Among them, ε is the relative dielectric constant of the medium. The wavelength in the embodiments of the present application generally refers to the dielectric wavelength, which can be the dielectric wavelength corresponding to the center frequency of the resonant frequency, or the dielectric wavelength corresponding to the center frequency of the working frequency band supported by the antenna. For example, assuming that the center frequency of the B1 uplink frequency band (resonant frequency is 1920MHz to 1980MHz) is 1955MHz, the wavelength can be the dielectric wavelength calculated using the frequency of 1955MHz. Not limited to the center frequency, "dielectric wavelength" may also refer to the dielectric wavelength corresponding to the non-center frequency of the resonant frequency or the working frequency band. For ease of understanding, the dielectric wavelength mentioned in the embodiments of the present application can be simply calculated by the relative dielectric constant of the medium filled on one or more sides of the radiator.

[0086] Those skilled in the art can understand that efficiency is generally expressed as a percentage, and there is a corresponding conversion relationship between efficiency and dB. The closer the efficiency is to 0 dB, the better the efficiency of the antenna.

[0087] Antenna pattern: also called radiation pattern. It refers to the graph of the relative field strength (normalized modulus) of the antenna radiation field changing with direction at a certain distance from the antenna (far field). It is usually represented by two mutually perpendicular plane patterns in the direction of maximum radiation of the antenna.

[0088] Antenna radiation patterns usually have multiple radiation beams. The radiation beam with the strongest radiation intensity is called the main lobe, and the remaining radiation beams are called side lobes or side lobes. Among the side lobes, the side lobe in the opposite direction of the main lobe is also called the back lobe.

[0089] Directivity: Also known as the directivity of an antenna. It refers to the ratio of the maximum power density to the average value on the antenna pattern at a certain distance from the antenna (far field), which is a dimensionless ratio greater than or equal to 1. It can be used to indicate the energy radiation characteristics of an antenna. The larger the directivity, the more energy the antenna radiates in a certain direction, and the more concentrated the energy radiation.

[0090] Antenna system efficiency (total efficiency): refers to the ratio of input power to output power at the antenna port.

[0091] Antenna radiation efficiency: refers to the ratio of the power radiated by the antenna into space (i.e. the power of the electromagnetic wave part that is effectively converted) to the active power input to the antenna. Among them, the active power input to the antenna = the input power of the antenna - the loss power; the loss power mainly includes the return loss power and the ohmic loss power of the metal and / or the dielectric loss power. The radiation efficiency is a value that measures the radiation ability of the antenna. Metal loss and dielectric loss are both factors that affect the radiation efficiency.

[0092] Those skilled in the art can understand that efficiency is generally expressed as a percentage, and there is a corresponding conversion relationship between efficiency and dB. The closer the efficiency is to 0 dB, the better the efficiency of the antenna.

[0093] Antenna return loss: It can be understood as the ratio of the signal power reflected back to the antenna port through the antenna circuit to the transmit power of the antenna port. The smaller the reflected signal, the larger the signal radiated into space through the antenna, and the greater the radiation efficiency of the antenna. The larger the reflected signal, the smaller the signal radiated into space through the antenna, and the lower the radiation efficiency of the antenna.

[0094] Antenna return loss can be represented by the S11 parameter, which is one of the S parameters. S11 represents the reflection coefficient, which can characterize the antenna transmission efficiency. The S11 parameter is usually a negative number. The smaller the S11 parameter is, the smaller the antenna return loss is, and the less energy is reflected back by the antenna itself, which means that more energy actually enters the antenna, and the higher the antenna system efficiency is; the larger the S11 parameter is, the greater the antenna return loss is, and the lower the antenna system efficiency is.

[0095] It should be noted that in engineering, the S11 value is generally -6dB as the standard. When the S11 value of an antenna is less than -6dB, it can be considered that the antenna can work normally, or that the antenna has good transmission efficiency.

[0096] Ground (GND): can refer to at least a part of any grounding layer, grounding plate, or grounding metal layer in an electronic device (such as a mobile phone), or at least a part of any combination of any of the above grounding layers, grounding plates, or grounding components, etc. "GND" can be used for grounding components in electronic devices. In one embodiment, "ground" can be a grounding layer of a circuit board of an electronic device, or a grounding plate formed by a frame of an electronic device, or a grounding metal layer formed by a metal film under a screen. In one embodiment, the circuit board can be a printed circuit board (PCB), such as an 8-layer, 10-layer, or 12 to 14-layer board having 8, 10, 12, 13, or 14 layers of conductive material, or an element separated and electrically insulated by a dielectric layer or insulating layer such as glass fiber, polymer, etc. In one embodiment, the circuit board includes a dielectric substrate, a grounding layer, and a routing layer, and the routing layer and the grounding layer are electrically connected through vias. In one embodiment, components such as a display, a touch screen, input buttons, a transmitter, a processor, a memory, a battery, a charging circuit, a system on chip (SoC) structure, etc. can be mounted on or connected to a circuit board; or electrically connected to a wiring layer and / or a ground layer in the circuit board. For example, a radio frequency source is disposed on the wiring layer.

[0097] Any of the above-mentioned grounding layers, grounding plates, or grounding metal layers are made of conductive materials. In one embodiment, the conductive material can be any of the following materials: copper, aluminum, stainless steel, brass and their alloys, copper foil on an insulating substrate, aluminum foil on an insulating substrate, gold foil on an insulating substrate, silver-plated copper, silver-plated copper foil on an insulating substrate, silver foil and tin-plated copper on an insulating substrate, cloth impregnated with graphite powder, graphite-coated substrates, copper-plated substrates, brass-plated substrates, and aluminum-plated substrates. It will be appreciated by those skilled in the art that the grounding layer / grounding plate / grounding metal layer can also be made of other conductive materials.

[0098] Grounding: refers to coupling with the above-mentioned ground / floor in any way. In one embodiment, grounding can be achieved through physical grounding, such as physical grounding (or physical ground) at a specific position on the frame through some structural parts of the middle frame. In one embodiment, grounding can be achieved through device grounding, such as grounding through devices such as capacitors / inductors / resistors connected in series or in parallel (or device ground).

[0099] The technical solution of the embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0100] like Figure 1 As shown, the electronic device 10 may include: a cover 13, a display screen / module (display) 15, a printed circuit board (PCB) 17, a middle frame (middle frame) 19 and a rear cover (rear cover) 21. It should be understood that in some embodiments, the cover 13 may be a glass cover, or may be replaced by a cover made of other materials, such as a PET (Polyethylene terephthalate) material cover.

[0101] The cover plate 13 may be disposed closely to the display module 15 , and may be mainly used to protect the display module 15 and prevent dust.

[0102] In one embodiment, the display module 15 may include a liquid crystal display panel (LCD), a light emitting diode (LED) display panel or an organic light emitting semiconductor (OLED) display panel, etc., but the embodiment of the present application does not limit this.

[0103] The middle frame 19 mainly supports the entire device. Figure 1It is shown that PCB17 is arranged between the middle frame 19 and the back cover 21. It should be understood that in one embodiment, PCB17 can also be arranged between the middle frame 19 and the display module 15, and the embodiment of the present application does not limit this. Among them, the printed circuit board PCB17 can adopt a flame retardant material (FR-4) dielectric board, a Rogers dielectric board, a mixed dielectric board of Rogers and FR-4, and so on. Here, FR-4 is a code for a grade of flame retardant material, and the Rogers dielectric board is a high-frequency board. Electronic components, such as radio frequency chips, etc. are carried on PCB17. In one embodiment, a metal layer can be provided on the printed circuit board PCB17. The metal layer can be used for grounding the electronic components carried on the printed circuit board PCB17, and can also be used for grounding other components, such as bracket antennas, frame antennas, etc. The metal layer can be called a floor, a grounding plate, or a grounding layer. In one embodiment, the metal layer can be formed by etching metal on the surface of any layer of the dielectric board in PCB17. In one embodiment, the metal layer for grounding can be provided on the side of the printed circuit board PCB17 close to the middle frame 19. In one embodiment, the edge of the printed circuit board PCB17 can be regarded as the edge of its grounding layer. In one embodiment, the metal middle frame 19 can also be used for grounding the above components. The electronic device 10 can also have other floors / grounding plates / grounding layers, as described above, which will not be repeated here.

[0104] The electronic device 10 may further include a battery (not shown). The battery may be disposed between the middle frame 19 and the back cover 21, or between the middle frame 19 and the display module 15, and the embodiment of the present application does not limit this. In some embodiments, the PCB 17 is divided into a main board and a sub-board, and the battery may be disposed between the main board and the sub-board, wherein the main board may be disposed between the middle frame 19 and the upper edge of the battery, and the sub-board may be disposed between the middle frame 19 and the lower edge of the battery.

[0105] The electronic device 10 may further include a frame 11, which may be formed of a conductive material such as metal. The frame 11 may be disposed between the display module 15 and the back cover 21 and extend circumferentially around the periphery of the electronic device 10. The frame 11 may have four sides surrounding the display module 15 to help fix the display module 15. In one implementation, the frame 11 made of a metal material may be directly used as a metal frame of the electronic device 10, forming the appearance of a metal frame, which is suitable for a metal industrial design (industrial design, ID). In another implementation, the outer surface of the frame 11 may also be a non-metallic material, such as a plastic frame, forming the appearance of a non-metallic frame, which is suitable for a non-metallic ID.

[0106] The middle frame 19 may include a border 11. The middle frame 19 including the border 11 is an integral part, which can support the electronic devices in the whole machine. The cover plate 13 and the back cover 21 are respectively covered along the upper and lower edges of the border to form a shell or housing (housing) of the electronic device. In one embodiment, the cover plate 13, the back cover 21, the border 11 and / or the middle frame 19 can be collectively referred to as the shell or housing of the electronic device 10. It should be understood that "shell or housing" can be used to refer to part or all of any one of the cover plate 13, the back cover 21, the border 11 or the middle frame 19, or to refer to part or all of any combination of the cover plate 13, the back cover 21, the border 11 or the middle frame 19.

[0107] The frame 11 on the middle frame 19 can at least partially serve as an antenna radiator to receive / transmit radio frequency signals. There can be a gap between this portion of the frame serving as the radiator and other portions of the middle frame 19, thereby ensuring that the antenna radiator has a good radiation environment. In one embodiment, the middle frame 19 can be provided with an aperture at this portion of the frame serving as the radiator to facilitate antenna radiation.

[0108] Alternatively, the frame 11 may not be considered as a part of the middle frame 19. In one embodiment, the frame 11 may be connected to the middle frame 19 and formed integrally. In another embodiment, the frame 11 may include a protrusion extending inward to be connected to the middle frame 19, for example, by means of a shrapnel, a screw, welding, etc. The protrusion of the frame 11 may also be used to receive a feed signal, so that at least a portion of the frame 11 serves as a radiator of the antenna to receive / transmit radio frequency signals. There may be a gap 42 between this portion of the frame that serves as a radiator and the middle frame 30, thereby ensuring that the antenna radiator has a good radiation environment, so that the antenna has a good signal transmission function.

[0109] The back cover 21 may be a back cover made of metal material; or a back cover made of non-conductive material, such as a glass back cover, a plastic back cover, or a back cover made of both conductive and non-conductive materials. In one embodiment, the back cover 21 made of conductive material may replace the middle frame 19 and be integrated with the frame 11 to support the electronic components in the whole device.

[0110] In one embodiment, the middle frame 19 and / or the conductive parts in the back cover 21 can be used as the reference ground of the electronic device 10, wherein the frame 11, PCB 17, etc. of the electronic device can be grounded through electrical connection with the middle frame.

[0111] The antenna of the electronic device 10 can also be arranged in the frame 11. When the frame 11 of the electronic device 10 is a non-conductive material, the antenna radiator can be located in the electronic device 10 and arranged along the frame 11. For example, the antenna radiator is arranged close to the frame 11 to minimize the volume occupied by the antenna radiator and to be closer to the outside of the electronic device 10 to achieve better signal transmission effect. It should be noted that the antenna radiator is arranged close to the frame 11 means that the antenna radiator can be arranged close to the frame 11, or it can be arranged close to the frame 11, for example, there can be a certain small gap between the antenna radiator and the frame 11.

[0112] The antenna of the electronic device 10 may also be disposed in the housing, such as a bracket antenna, a millimeter wave antenna, etc. ( Figure 1 ). The clearance of the antenna disposed in the housing can be obtained by the slits / openings on any one of the middle frame, and / or the frame, and / or the back cover, and / or the display screen, or by the non-conductive gap / aperture formed between any of them. The clearance setting of the antenna can ensure the radiation characteristics of the antenna. It should be understood that the clearance of the antenna can be a non-conductive area formed by any conductive components in the electronic device 10, and the antenna radiates signals to the external space through the non-conductive area. In one embodiment, the antenna 40 can be in the form of an antenna based on a flexible printed circuit (FPC), an antenna based on laser direct structuring (LDS), or a microstrip disk antenna (MDA). In one embodiment, the antenna can also be a transparent structure embedded in the screen of the electronic device 10, so that the antenna is a transparent antenna unit embedded in the screen of the electronic device 10.

[0113] Figure 1 Only some components of the electronic device 10 are schematically shown, and the actual shapes, sizes and structures of these components are not subject to the present invention. Figure 1 limited.

[0114] It should be understood that in the embodiments of the present application, the surface where the display screen of the electronic device is located can be considered as the front side, the surface where the back cover is located can be considered as the back side, and the surface where the frame is located can be considered as the side side.

[0115] It should be understood that in the embodiments of the present application, when the user is holding the electronic device (usually vertically and facing the screen), the electronic device is located at a position having a top, a bottom, a left side, and a right side. It should be understood that in the embodiments of the present application, when the user is holding the electronic device (usually vertically and facing the screen), the electronic device is located at a position having a top, a bottom, a left side, and a right side.

[0116] First, by Figure 2 and Figure 3 To introduce this application, four antenna modes will be involved. Among them, Figure 2 This is a schematic diagram of the common mode structure of an antenna provided in the present application and the corresponding current and electric field distribution. Figure 3 This is a schematic diagram of the structure of the differential mode of another antenna provided in the present application and the corresponding current and electric field distribution. Figure 2 and Figure 3 The antenna radiator is open at both ends, and its common mode mode and differential mode can be called line common mode mode and line differential mode mode respectively.

[0117] 1. Slot CM mode

[0118] Figure 2 The radiator of the antenna 60 shown in (a) has a hollow slot or gap 61, or the radiator of the antenna 60 and the ground (for example, the floor, which can be a PCB) enclose the slot or slot 61. The slot 61 can be formed by grooving the floor. An opening 62 is provided on one side of the slot 61, and the opening 62 can be specifically opened in the middle position of the side. The middle position of the side of the slot 61 can be, for example, the geometric midpoint of the antenna 60, or the midpoint of the electrical length of the radiator, for example, the area where the opening 62 is opened on the radiator covers the middle position of the side. The opening 62 can be connected to the feeding circuit, and antisymmetric feeding can be used. It should be understood that antisymmetric feeding can be understood as the positive and negative poles of the feeding circuit are respectively connected to the two ends of the radiator. The signals output by the positive and negative poles of the feeding circuit have the same amplitude and opposite phases, for example, the phase difference is 180°±10°.

[0119] Figure 2 (b) in FIG. 6 shows the current, electric field, and magnetic current distribution of the antenna 60. Figure 2 As shown in (b) of FIG. 1 , the current on the conductor (such as the floor, and / or the radiator 60) around the slot 61 is distributed in the same direction around the slot 61, the electric field is distributed in opposite directions on both sides of the middle position of the slot 61, and the magnetic current is distributed in opposite directions on both sides of the middle position of the slot 61. Figure 2 As shown in (b), the electric field at the opening 62 (e.g., the feeding point) is in the same direction, and the magnetic current at the opening 62 (e.g., the feeding point) is in the same direction. Based on the same direction of the magnetic current at the opening 62 (the feeding point), Figure 2 The feeding shown in (a) of FIG. 6 is referred to as slot CM feeding. Based on the current being distributed in the same direction (e.g., anti-symmetric distribution) on the radiators on both sides of the opening 62, or based on the current being distributed in the same direction around the slot 61 on the conductors around the slot 61, Figure 2 The antenna mode shown in (b) can be called a slot CM mode (also referred to as a CM mode for short. For example, for a slot antenna, the CM mode refers to a slot CM mode). Figure 2The electric field, current, and magnetic current distributions shown in (b) can be called the electric field, current, and magnetic current of the slot CM mode.

[0120] The magnetic field is weak in the middle of the antenna 60 and strong at both ends of the antenna 60. The electric field is strong in the middle of the antenna 60 (the largest point of the electric field is located near the middle of the antenna 60) and weak at both ends of the antenna 60, such as Figure 2 As shown in (b) in .

[0121] 2. Slot DM mode

[0122] like Figure 3 The radiator of the antenna 70 shown in (a) has a hollow slot or gap 72, or the radiator of the antenna 70 and the ground (for example, the floor, which can be a PCB) enclose the slot or slot 72. The slot 72 can be formed by making a slot on the floor. The middle position 71 of the slot 72 is connected to the feeding circuit, and symmetrical feeding is adopted. It should be understood that symmetrical feeding can be understood as one end of the feeding circuit is connected to the radiator and the other end is grounded, wherein the connection point between the feeding circuit and the radiator (feeding point) is located at the center of the radiator, and the center of the radiator can be, for example, the midpoint of the geometric structure, or the midpoint of the electrical length (or an area within a certain range near the above midpoint). The middle position of one side of the slot 72 is connected to the positive pole of the feeding circuit, and the middle position of the other side of the slot 72 is connected to the negative pole of the feeding circuit. The middle position of the side of the slot 72 can be, for example, the middle position of the slot antenna 60 / the middle position of the ground, such as the geometric midpoint of the slot antenna, or the midpoint of the electrical length of the radiator, such as the connection between the feeding circuit and the radiator covering the middle position 51 of the side.

[0123] Figure 3 (b) in FIG. 7 shows the current, electric field, and magnetic current distribution of the antenna 70. Figure 3 As shown in (b) of FIG. 1 , on the conductor (such as the floor, and / or the radiator 60) around the slot 72, the current is distributed around the slot 72, and is distributed in opposite directions on both sides of the middle position of the slot 72, the electric field is distributed in the same direction on both sides of the middle position 71, and the magnetic current is distributed in the same direction on both sides of the middle position 71. The magnetic current at the feeding circuit is distributed in opposite directions (not shown). Based on the magnetic current at the feeding circuit being distributed in opposite directions, Figure 3 The feeding shown in (a) in FIG. 1 may be referred to as slot DM feeding. Based on the reverse distribution (e.g., symmetrical distribution) of the current on both sides of the connection between the feeding circuit and the radiator, or based on the reverse distribution (e.g., symmetrical distribution) of the current around the slot 71, Figure 3 The antenna mode shown in (b) can be called a slot DM mode (can also be referred to as a DM mode for short, for example, for a slot antenna, the DM mode refers to a slot DM mode). Figure 3 The distribution of electric field, current and magnetic current shown in (b) can be called the electric field, current and magnetic current of the slot DM mode.

[0124] The current is weaker in the middle of the antenna 70 and stronger at both ends of the antenna 70. The electric field is stronger in the middle of the antenna 70 (the largest point of the electric field is located near the middle of the antenna 60) and weaker at both ends of the slot antenna 70, such as Figure 3 As shown in (b) in .

[0125] It should be understood that the radiator of the antenna can be understood as a metal structure that generates radiation (for example, a part of the floor), which may include an opening, such as Figure 2 As shown, or, it can also be a complete ring, such as Figure 3 As shown, it can be adjusted according to actual design or production needs. For example, for the slot CM mode, it can also be Figure 3 As shown in the figure, a complete annular radiator is used, two feeding points are set at the middle position of the radiator on one side of the slot 61, and an anti-symmetric feeding method is adopted. For example, signals with the same amplitude and opposite phases are fed into the two ends of the original opening position, and the same Figure 2 The antenna structure shown in FIG. 1 has a similar effect. Correspondingly, for the slot DM mode, it can also be Figure 2 The radiator with an opening is shown in the figure, and a symmetrical feeding method is adopted at both ends of the opening. For example, the same feed source signal is fed into both ends of the radiator on both sides of the opening, and the same Figure 3 The antenna structure shown has a similar effect.

[0126] 3. Slot CM-DM mode.

[0127] Above Figure 2 and Figure 3 It is shown that the slot structure uses different feeding methods to generate slot CM mode and slot DM mode respectively.

[0128] When the antenna is fed in an asymmetric way (the feeding point deviates from the middle position, including side feeding or offset feeding), or the opening of one side of the slot is asymmetric (the opening deviates from the middle position of the side), the antenna can simultaneously generate the first resonance and the second resonance, corresponding to the slot CM mode and the slot DM mode, respectively. For example, the first resonance corresponds to the slot CM mode, and the current, electric field, and magnetic current distribution are as follows: Figure 2 The second resonance corresponds to the slot DM mode, and the current, electric field, and magnetic current distribution are shown in (b). Figure 3 As shown in (b) in .

[0129] Figure 4 It is a schematic diagram of an antenna 200 provided in an embodiment of the present application.

[0130] like Figure 4 As shown, the antenna 200 includes a first radiator 210 and a second radiator 220 .

[0131] The first end of the first radiator 210 and the first end of the second radiator 220 are opposite and do not contact each other. The second end of the second radiator 220 is coupled to the floor. The first end and the second end of the first radiator 210 are open ends. The first end of the second radiator 220 is an open end, and the second end is a ground end.

[0132] The antenna 200 may further include a first electronic component 231 , a second electronic component 232 , and a feeding circuit 230 .

[0133] The first end of the first radiator 210 includes a first connection point 211, and the first end of the second radiator 220 includes a second connection point 212. The feed circuit 230 is coupled to the second connection point 212. The first end of the first electronic component 231 is coupled to the second connection point 212, and the second end is coupled to the floor. The first end of the second electronic component 232 is coupled to the first connection point 211, and the second end is coupled to the second connection point 212.

[0134] It should be understood that when the feeding circuit 230 feeds an electrical signal, the antenna 200 can simultaneously generate a first resonance and a second resonance by the line CM-DM mode, the first resonance can correspond to the above-mentioned line CM mode, and the second resonance can correspond to the above-mentioned line DM mode. The antenna 200 can be close to the resonance generated by the slot CM mode and the slot DM mode to form a resonant frequency band together to expand the working bandwidth of the antenna 200.

[0135] Figure 5 and Figure 6 yes Figure 4 The current distribution diagram of the antenna 200 is shown in FIG. Figure 5 yes Figure 4 The diagram shows the current distribution of the antenna 200 at the first resonance. Figure 6 yes Figure 4 The current distribution diagram of the antenna 200 at the second resonance is shown.

[0136] like Figure 5 As shown, at the resonance point of the first resonance, the current on the first radiator and the current on the second radiator are opposite. On the radiators on both sides of the gap formed between the first end of the first radiator and the first end of the second radiator, opposite currents are distributed respectively. The current distribution on the first radiator and the second radiator conforms to the current characteristics of the line CM mode.

[0137] like Figure 6As shown, at the resonance point of the second resonance, the current on the first radiator and the current on the second radiator are in the same direction. On the radiators on both sides of the gap formed between the first end of the first radiator and the first end of the second radiator, currents in the same direction are distributed respectively (or in other words, there is no current reversal point on the radiator). The current distribution on the first radiator and the second radiator conforms to the current characteristics of the line DM mode.

[0138] Figure 7 yes Figure 4 The simulation results of the S parameters, radiation efficiency and system efficiency of the antenna 200 are shown.

[0139] like Figure 7 As shown, the antenna can resonate at around 1.72 GHz (first resonance) and around 2.86 GHz (second resonance).

[0140] Near the resonance point of the first resonance, the radiation efficiency and system efficiency are good. However, since the currents of the line CM mode and the line DM mode on the second radiator are opposite (non-convergent), some currents will be canceled. Therefore, near the resonance point of the second resonance (for example, greater than the resonance point frequency of the second resonance), the radiation efficiency and system efficiency decrease, which will result in a narrow bandwidth of the antenna efficiency (radiation efficiency and system efficiency).

[0141] An embodiment of the present application provides an electronic device, including an antenna. The antenna uses a conductive part of a frame of the electronic device as a radiator. By feeding an electrical signal to the radiator in an indirect coupling manner, the antenna can generate a first resonance and a second resonance. The two resonances can jointly form a resonant frequency band to expand the bandwidth, and the antenna has good radiation efficiency and system efficiency in the resonant frequency band.

[0142] Figure 8 It is a schematic diagram of another electronic device 10 provided in an embodiment of the present application.

[0143] like Figure 8 As shown, the electronic device 10 includes a frame 11 , an antenna 200 and a floor 300 .

[0144] At least part of the frame 11 is spaced apart from the floor 300. The frame 11 includes a first position 201, a second position 202 and a third position 203 which are sequentially arranged, and the second position 202 is located between the first position 201 and the third position 203. The frame 11 has a first gap and a second gap respectively formed at the first position 201 and the second position 202. The frame 11 is coupled to the floor 300 at the third position 203.

[0145] It should be understood that for the sake of simplicity of discussion, in the embodiments of the present application, only coupling connection is used as an example of electrical connection. In actual production or design, the same technical effect can also be achieved through indirect coupling.

[0146] In one embodiment, the third position 203 is coupled with the floor 300 to realize the grounding of the radiator. The third position 203 can be electrically connected to the floor 300 through a spring, or can be electrically connected to the floor 300 through an inductor / 0 ohm (0 ohm), or can be electrically connected to the floor 300 through an inductive member (such as a connecting rib structure). Electrically connecting to the floor 300 through the connecting rib structure can be understood as at least part of the frame 11 and the floor 300 being an integrated structure.

[0147] In one embodiment, the electronic device includes the above-mentioned middle frame, and the middle frame includes the above-mentioned frame 11 and the middle plate. In one embodiment, the middle plate and the floor 300 are grounded through multiple electrical connections (for example, springs, etc.). In one embodiment, the middle plate can be regarded as a part of the floor 300. In one embodiment, the frame 11 is electrically connected to the middle plate through a connecting rib structure (not shown in the figure). The connecting rib structure (not shown in the figure) is connected between the frame and the middle plate, and is integrally formed with the frame and the middle plate.

[0148] The antenna 200 includes a first radiator 210 , a second radiator 220 , a feeding circuit 230 , a first electronic component 231 , and a second electronic component 232 .

[0149] The first radiator 210 includes a conductive portion of the frame 11 between the first position 201 and the second position 202. The second radiator 220 includes a conductive portion of the frame 11 between the second position 202 and the third position 203. The length L1 of the first radiator 210 and the length L2 of the second radiator satisfy: L1<1.5×L2, and L2<1.5×L1. In one embodiment, the length L1 of the first radiator 210 and the length L2 of the second radiator satisfy: L1×66%<L2<L1×150%. For example, the length L1 of the first radiator 210 and the length L2 of the second radiator satisfy: L1×80%≤L2≤L1×120%.

[0150] The first end of the first radiator 210 includes a first connection point 211 and a second connection point 212. The first end of the second radiator 220 includes a third connection point 213 and a feeding point 221. The first end of the first radiator 210 and the first end of the second radiator 220 are opposite to each other and do not contact each other, and the first end of the first radiator 210 and the first end of the second radiator 220 are one end at the second position.

[0151] It should be understood that the first end 2101 of the first radiator 210 and the first end 2201 of the second radiator 220 are opposite to each other and do not contact each other, which means that the first end face of the first radiator 210 and the first end face of the second radiator 220 are opposite to each other and do not contact each other. Fig. 9 As shown. The first end / second end of the radiator described in the embodiment of the present application refers to the portion of the radiator whose length is within 5mm (including 5mm) from the end face of the end. It should be understood that the points (for example, connection points or feeding points) included in the first end / second end of the radiator can be understood as the length of the radiator (frame) between the point (for example, connection point or feeding point) and the end / end face of the radiator is less than or equal to 5mm. In one embodiment, when a metal component such as a metal spring is coupled to the point (for example, a connection point or a feeding point), it can be understood as the length of the radiator (frame) between the end / end face of the radiator connected to the metal component and the point (for example, a connection point or a feeding point).

[0152] The first end of the first electronic component 231 is coupled to the first connection point 211, and the second end of the first electronic component 231 is coupled to the floor 300. The first end of the second electronic component 232 is coupled to the second connection point 212, and the second end of the second electronic component 232 is coupled to the third connection point 213.

[0153] The feeding circuit 230 is coupled to the feeding point 221 .

[0154] The first radiator 210 and the second radiator 220 are used to generate a first resonance and a second resonance, and the first resonance and the second resonance are used to jointly support an operating frequency band of the electronic device 10 .

[0155] The first working frequency band of the electronic device 10 includes a frequency range, such as a low frequency band (LB) (698MHz-960MHz), a middle frequency band (MB) (1710MHz-2170MHz) or a high frequency band (HB) (2300MHz-2690MHz) in a cellular network. Taking the first working frequency band of the electronic device 10 as LB (698MHz-960MHz) as an example, the working frequency band may include multiple communication frequency bands within the frequency range, such as B5, B8, etc., which can be understood accordingly in the embodiments of the present application.

[0156] It should be understood that in the technical solution provided by the embodiment of the present application, the second end of the first radiator 210 is coupled to the floor 300 and connected as a ground end, and the second end of the second radiator 220 is an open end. In addition, since the clearance of the antenna 200 is small (for example, the distance between the first radiator 210, the second radiator 220 and the floor is less than or equal to 3 mm), the first radiator 210 and the second radiator 220 can form a radiator structure similar to a slot antenna. When the feeding circuit 230 feeds an electrical signal, the antenna 200 can generate the above-mentioned first resonance and second resonance to expand the working bandwidth of the antenna 200.

[0157] In one embodiment, the first resonance and the second resonance can be close to each other so that the first resonance and the second resonance are used to jointly support the first operating frequency band of the electronic device 10. In one embodiment, in at least part of the low frequency band (698MHz-960MHz), the frequency difference between the resonance point frequency of the first resonance and the resonance point frequency of the second resonance is greater than or equal to 80MHz and less than or equal to 160MHz. In at least part of the medium frequency band (1710MHz-2170MHz), the frequency difference between the resonance point frequency of the first resonance and the resonance point frequency of the second resonance is greater than or equal to 150MHz and less than or equal to 240MHz. In at least part of the high frequency band (2300MHz-2690MHz), the frequency difference between the resonance point frequency of the first resonance and the resonance point frequency of the second resonance is greater than or equal to 200MHz and less than or equal to 300MHz.

[0158] In one embodiment, at the resonance point of the first resonance, the current on the first radiator 210 and the current on the second radiator 220 (the current on the radiators on both sides of the second slot) are in the same direction, and each distributes current in the same direction (or, there is no current reversal point). In one embodiment, at the resonance point of the second resonance, the current on the first radiator 210 and the current on the second radiator 220 (the current on the radiators on both sides of the second slot) are in the same direction, and each distributes current in the same direction (or, there is no current reversal point).

[0159] It should be understood that the above-mentioned current same direction can be understood as the current flowing from one end to the other end, for example, the current on the first radiator 210 and the second radiator 220 flows from the first position 201 (the second end of the first radiator 210) to the third position 203 (the second end of the second radiator 220), or, from the third position 203 (the second end of the second radiator 220) to the first position 201 (the second end of the first radiator 210). Alternatively, the above-mentioned current same direction can be understood as the current is distributed in the same direction on the path of the current flow, and there is no current reversal point. For the sake of simplicity of discussion, the current same direction mentioned in the embodiments of the present application can be understood accordingly.

[0160] It should be understood that both the first resonance and the second resonance can be regarded as being generated by the slot CM mode. Since the slot CM mode has higher radiation efficiency and system efficiency, the antenna has better radiation efficiency and system efficiency within the working frequency band formed by the first resonance and the second resonance.

[0161] In one embodiment, the first position 201 and the second position 202 are located at the first side of the frame 11. The length of the frame 11 between the first position 201 and the center of the first side is the same as the length of the frame 11 between the second position 202 and the center of the first side, and the lengths of the first sides on both sides of the center are the same.

[0162] It should be understood that the symmetry between the first position 201 (first slot) and the second position 202 (second slot) (for example, symmetry along the center position of the first side) can increase the symmetry of the antenna 200, thereby improving the radiation characteristics of the antenna 200 (for example, the operating bandwidth).

[0163] Meanwhile, the symmetry between the first position 201 (first gap) and the second position 202 (second gap) can enhance the aesthetics of the electronic device 10 .

[0164] In one embodiment, the symmetry of the first position 201 (first gap) and the second position 202 (second gap) may have partial redundancy in engineering applications. For example, when the length of the first frame 11 between the first position 201 and the center of the first side differs from the length of the frame 11 between the second position 202 and the center of the first side within a range of 10%, it can be considered to be within the same range of length. Alternatively, the above redundancy is determined according to different device types. When the electronic device 10 is a mobile phone, the length of the first frame 11 between the first position 201 and the center of the first side differs from the length of the frame 11 between the second position 202 and the center of the first side within a range of 2 mm, which can be considered to be within the same range of length. When the electronic device 10 is a tablet / notebook, the length of the first frame 11 between the first position 201 and the center of the first side differs from the length of the frame 11 between the second position 202 and the center of the first side within a range of 5 mm, which can be considered to be within the same range of length.

[0165] In one embodiment, at the resonance point of the first resonance, the intensity of the current on the first radiator 210 is greater than the intensity of the current on the second radiator 220. In one embodiment, at the resonance point of the second resonance, the intensity of the current on the first radiator 210 is less than the intensity of the current on the second radiator 220.

[0166] It should be understood that the intensity of the current described in the embodiments of the present application can be understood as the density of the current, and a large intensity of the current can be understood as a more dense current. In the simulation results, a large intensity of the current can be understood as a large amplitude / value of the current. For example, in a simulation result of a current distribution, when the intensity of the current is large, it is usually red, or there are denser current arrows near the area with large current intensity.

[0167] In one embodiment, at the resonance point of the first resonance, the intensity of the electric field generated near the first radiator 210 is greater than the intensity of the electric field generated near the second radiator 220. In one embodiment, at the resonance point of the second resonance, the intensity of the electric field generated near the first radiator 210 is less than the intensity of the electric field generated near the second radiator 220.

[0168] It should be understood that the intensity of the electric field described in the embodiments of the present application can be understood as the density of the electric field, and a large intensity of the electric field can be understood as a denser electric field. In the simulation results, a large intensity of the electric field can be understood as a large amplitude / value of the electric field. For example, in a simulation result of an electric field distribution, when the intensity of the electric field is large, it is usually red, or there are denser electric field arrows near an area with a large intensity of the electric field (for example, between a radiator and a floor).

[0169] It should be understood that the first resonance is caused by the first radiator 210 as the main radiator (the current on the first radiator 210 or the electric field generated is relatively strong), and the second resonance is caused by the second radiator 220 as the main radiator (the current on the second radiator 220 or the electric field generated is relatively strong).

[0170] At the same time, since the first resonance uses the first radiator 210 as the main radiator and the second resonance uses the second radiator 220 as the main radiator, the user can use the radiator that is farther away from the human body as the main radiator when holding the electronic device with the left hand or the right hand. In this case, when the user holds the electronic device, it will not have a significant impact on the radiation characteristics of the antenna.

[0171] In one embodiment, the first electronic component 231 is a capacitive component, and the equivalent capacitance value of the first electronic component 231 is less than or equal to 5pF. In one embodiment, based on the center frequency of the first frequency band being less than or equal to 1GHz, the equivalent capacitance value of the first electronic component 231 is greater than 3pF and less than or equal to 5pF. In one embodiment, based on the center frequency of the first frequency band being greater than 1GHz and less than or equal to 3GHz, the equivalent capacitance value of the first electronic component 231 is greater than 0.5pF and less than or equal to 3pF. In one embodiment, based on the center frequency of the first frequency band being greater than 3GHz, the equivalent capacitance value of the first electronic component 231 is less than or equal to 0.5pF.

[0172] In one embodiment, the first electronic component 231 is an inductive component, and an equivalent inductance value of the first electronic component 231 is less than or equal to 3 nH.

[0173] In one embodiment, the second electronic component 232 is a capacitive component, and the equivalent capacitance of the first electronic component 231 is less than or equal to 2 pF.

[0174] In one embodiment, based on the center frequency of the first frequency band being less than or equal to 1 GHz, the equivalent capacitance value of the second electronic component 232 is greater than 1.5 pF and less than or equal to 2 pF. In one embodiment, based on the center frequency of the first frequency band being greater than 1 GHz and less than or equal to 3 GHz, the equivalent capacitance value of the second electronic component 232 is greater than 0.5 pF and less than or equal to 1.5 pF. In one embodiment, based on the center frequency of the first frequency band being greater than 3 GHz, the equivalent capacitance value of the second electronic component 232 is less than or equal to 0.5 pF.

[0175] It should be understood that the first electronic component 231 can be used to adjust the grounding state of the first end of the first radiator 210, so as to determine the radiation characteristics (e.g., the resonance point frequency of the resonance) when the antenna 200 generates the first resonance. The second electronic component 231 can be used to determine the radiation characteristics (e.g., the resonance point frequency of the resonance) when the antenna 200 generates the second resonance.

[0176] The first end of the second radiator 220 is an open end. When the feeding circuit 230 feeds an electrical signal, a strong electric field (the magnetic field is much smaller than the electric field) is generated near the first end of the second radiator 220. The first end of the first radiator 210 and the first end of the second radiator 220 can generate a second resonance by electric field coupling. The first end of the first radiator 210 is coupled to the floor 300 through the first electronic component 231. A strong magnetic field (the electric field is much smaller than the magnetic field) is generated near the first end of the first radiator 210. The first electronic component 231 can make the first end of the first radiator 210 generate a weak electric field, thereby coupling with the electric field of the first end of the second radiator 220 to generate the first resonance.

[0177] In one embodiment, when the first electronic element 231 is a capacitive element, the resonance point frequency of the first resonance is higher than the resonance point frequency of the second resonance. In one embodiment, when the first electronic element 231 is an inductive element, the resonance point frequency of the first resonance is lower than the resonance point frequency of the second resonance.

[0178] In one embodiment, the first electronic component 231 is an adjustable capacitor or an adjustable inductor.

[0179] In one embodiment, the second electronic component 232 is an adjustable capacitor.

[0180] It should be understood that the first electronic component 231 can be an adjustable component to switch the resonance point frequency of the first resonance. The switch can switch the connection port electrically connected to the common port so that different capacitors or inductors are electrically connected between the floor 300 and the first connection point 211. In one embodiment, the first electronic component 231 can include a switch and multiple capacitors or inductors, and the switch and multiple capacitors or inductors are connected in series and coupled between the first connection point 211 and the floor 300. For example, the switch can be coupled between the first connection point 211 and multiple capacitors or inductors, the common port of the switch is coupled to the first connection point 211, and multiple capacitors or inductors are connected in series between the connection port of the switch and the floor 300. Alternatively, multiple capacitors or inductors can be coupled between the first connection point 211 and the switch. In one embodiment, the first electronic component 231 can be a tuner.

[0181] It should be understood that the adjustable elements (eg, the second electronic element) described in the embodiments of the present application may all adopt the same structure, and for the sake of brevity of discussion, they will not be described one by one.

[0182] In one embodiment, the length L1 of the first radiator 210 and the length L2 of the second radiator satisfy: L1×90%≤L2≤L1×110%.

[0183] In one embodiment, the first connection point 211 coincides with the second connection point 212. The coincidence can be understood as the first end of the first electronic component 231 and the first end of the second electronic component 232 being coupled to the first radiator 210 through the same connecting component, and the coincidence described in the embodiments of the present application can be understood accordingly.

[0184] In one embodiment, the third connection point 213 and the feeding point 221 coincide with each other.

[0185] In one embodiment, the antenna may further include a third electronic component 233, such as Fig.10 The second end of the first radiator 210 includes a fourth connection point 214 . The first end of the third electronic component 233 is coupled to the fourth connection point 214 , and the second end of the third electronic component 233 is coupled to the floor 300 .

[0186] It should be understood that the third electronic component 233 can be used to simultaneously determine the radiation characteristics (eg, the resonance point frequency of the resonance) of the antenna 200 when the antenna 200 generates the first resonance and the second resonance.

[0187] Meanwhile, the third electronic component 233 may also be used to adjust the balance between the first radiator 210 and the second radiator 220 when the antenna 200 resonates.

[0188] Among them, the balance between the first radiator 210 and the second radiator 220 can be understood as, when the antenna 200 resonates, reducing the difference in the intensity of the electric field (intensity of the current) generated by the first radiator 210 and the intensity of the electric field (intensity of the current) generated by the second radiator 220, so that when the user holds the electronic device 10 in the left hand or the right hand, the impact on the radiation characteristics of the antenna 200 is roughly the same, and the radiation characteristics of the antenna 200 will not be greatly different due to different holding postures of the user.

[0189] In one embodiment, the third electronic component 233 is an adjustable capacitor.

[0190] It should be understood that the third electronic component 233 may be an adjustable component to switch the radiation characteristics (eg, the resonance point frequency) of the antenna 200 when generating the first resonance and the second resonance.

[0191] In one embodiment, the first position 201 and the second position 202 are located at the bottom of the electronic device 10 (the first position 201 and the second position 202 are located at the first side of the frame, and the first side is the bottom side). Fig.11 The charging interface 260 of the electronic device 10 is located between the first position 201 and the second position 202 , and the charging interface 260 can be used to electrically connect with an external connection component to realize functions such as charging and data transmission of the electronic device 10 .

[0192] It should be understood that when the charging interface 260 is charging, a strong current will be generated near the charging interface 260. Since a portion of the charging interface is located on the first radiator 210, and the feeding point 221 of the antenna is located on the second radiator 220, the charging interface 260 has little effect on the radiation characteristics of the antenna when charging.

[0193] At the same time, the third position 203 can be located on the same side of the frame 11 as the first position 201 and the second position 202 (the second radiator 220 is in a straight line shape), or the third position 203 can be located on a different side of the frame 11 as the first position 201 and the second position 202 (the second radiator 220 is in a broken line shape). The embodiments of the present application do not impose any restrictions on this and can be selected according to actual production or setting.

[0194] Fig.12 and Fig.13 yes Fig.10 The simulation results of the antenna 200 in the electronic device 10 are shown. Fig.12 yes Fig.10 The S-parameter simulation results of the antenna 200 in the electronic device 10 are shown. Fig.13 yes Fig.10 The radiation efficiency simulation results of the antenna 200 in the electronic device 10 are shown.

[0195] like Fig.12 As shown, when the first electronic component is a capacitive component (e.g., 1pF), the first resonance is located near 2.6GHz, the second resonance is located near 1.9GHZ, and the resonance point frequency of the first resonance is higher than the resonance point frequency of the second resonance. When the first electronic component is an inductive component (e.g., 0nH), the first resonance is located near 1.4GHz, the second resonance is located near 1.9GHZ, and the resonance point frequency of the first resonance is lower than the resonance point frequency of the second resonance.

[0196] At the same time, the first electronic component has little influence on the resonance point frequency of the second resonance.

[0197] like Fig.13 As shown, since the first resonance and the second resonance are both generated by the slot CM mode, the antenna has good radiation efficiency within the resonance frequency band, there is no pit in the radiation efficiency, and has good radiation characteristics.

[0198] Fig.14 and Fig.15 yes Fig.10 The current distribution diagram of the antenna 200 in the electronic device 10 is shown. Fig.14 yes Fig.10 The diagram shows the current distribution of the antenna 200 in the electronic device 10 at the resonance point of the first resonance (eg, 2.65 GHz). Fig.15 yes Fig.10 The diagram shows the current distribution of the antenna 200 in the electronic device 10 at the second resonance point (eg, 1.95 GHz).

[0199] It should be understood that for the sake of simplicity, the first connection point 211 and the second connection point 212 coincide with each other, and the third connection point 213 and the feeding point 221 coincide with each other are taken as an example for description.

[0200] like Fig.14 As shown, at the resonance point of the first resonance, the current on the first radiator and the current on the second radiator (the current on the radiators on both sides of the second slot) are in the same direction, and each distributes current in the same direction (or, there is no current reversal point), which is consistent with the slot CM mode.

[0201] like Fig.15 As shown, at the resonance point of the second resonance, the current on the first radiator and the current on the second radiator (the current on the radiators on both sides of the second slot) are in the same direction, and each distributes current in the same direction (or, there is no current reversal point), which is consistent with the slot CM mode.

[0202] Figures 16 to 19 yes Figure 4 and Figure 8 The electric field distribution and magnetic field distribution of the antenna 200 are shown. Fig.16 yes Figure 4 The simulation results of the electric field distribution of the antenna 200 are shown. Fig.17 yes Figure 8 The simulation results of the electric field distribution of the antenna 200 are shown. Fig.18 yes Figure 4 The simulation results of the magnetic field distribution of the antenna 200 are shown. Fig.19 yes Figure 8 The simulation results of the magnetic field distribution of the antenna 200 are shown.

[0203] It should be understood that in the multiple distribution simulation results provided in the embodiments of the present application, a plane 5 mm away from the antenna is shown to present the distribution of the electric field and magnetic field generated in this area in the plane area when the antenna in the embodiments of the present application is working.

[0204] like Fig.16 As shown in (a) of Figure 4 The simulation results of the electric field distribution of the antenna at the first resonance point are shown in FIG. Fig.16 As shown in (b) of Figure 4 The simulation results of the electric field distribution of the antenna at the second resonance point are shown.

[0205] like Fig.17 As shown in (a) of Figure 8 The simulation results of the electric field distribution of the antenna at the first resonance point are shown in FIG. Fig.17 As shown in (b) of Figure 8 The simulation results of the electric field distribution of the antenna at the second resonance point are shown.

[0206] like Fig.16 and Fig.17 As shown in (a), at the resonance point of the first resonance, Figure 4 The electric field generated by the antenna is concentrated in the area between the first radiator 210 and the second radiator 220. Figure 8 The electric field generated by the antenna is concentrated in the vicinity of the first radiator 210 .

[0207] like Fig.16 and Fig.17 As shown in (b), at the resonance point of the second resonance, Figure 4 and Figure 8 The electric field generated by the antenna is concentrated in the vicinity of the second radiator 220 .

[0208] like Fig.18 As shown in (a) of Figure 4 The simulation results of the magnetic field distribution of the antenna at the first resonance point are shown in FIG. Fig.18 As shown in (b) of Figure 4 The simulation results of the magnetic field distribution of the antenna at the resonance point of the second resonance are shown.

[0209] like Fig.19 As shown in (a) of Figure 8 The simulation results of the magnetic field distribution of the antenna at the first resonance point are shown in FIG. Fig.19 As shown in (b) of Figure 8 The simulation results of the magnetic field distribution of the antenna at the resonance point of the second resonance are shown.

[0210] like Fig.18 and Fig.19 As shown in (a), at the resonance point of the first resonance, Figure 4 The magnetic field generated by the antenna is concentrated in the vicinity of the gap between the first radiator 210 and the second radiator 220. Figure 8 The magnetic field generated by the antenna is concentrated in the vicinity of the slot at the second end of the first radiator 210 .

[0211] like Fig.18 and Fig.19 As shown in (b), at the resonance point of the second resonance, Figure 4 and Figure 8 The magnetic field generated by the antenna is concentrated in the vicinity of the gap between the first radiator 210 and the second radiator 220 .

[0212] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An electronic device, characterized in that: include: floor; a frame, at least a portion of which is spaced apart from the floor, the frame comprising a first position, a second position and a third position which are sequentially arranged, the frame having a first gap and a second gap respectively formed at the first position and the second position, and the frame being coupled to the floor at the third position; An antenna, comprising: a first radiator and a second radiator, wherein the first radiator includes a conductive portion of the frame between the first position and the second position, and the second radiator includes a conductive portion of the frame between the second position and the third position, and a length L1 of the first radiator and a length L2 of the second radiator satisfy: L1<1.5×L2, and L2<1.5×L1; a first electronic component and a second electronic component, wherein the first end of the first radiator includes a first connection point and a second connection point, the first end of the second radiator includes a third connection point, the first end of the first electronic component is coupled to the first connection point, the second end of the first electronic component is coupled to the floor, the first end of the second electronic component is coupled to the second connection point, the second end of the second electronic component is coupled to the third connection point, and the first end of the first radiator and the first end of the second radiator are opposite to each other and do not contact each other; A feeding circuit, wherein the first end of the second radiator comprises a feeding point, and the feeding circuit is coupled to the feeding point; The first radiator and the second radiator are used to generate a first resonance and a second resonance, and the first resonance and the second resonance are used to jointly support a first operating frequency band of the electronic device.

2. The electronic device according to claim 1, characterized in that: The antenna further includes a third electronic component; The second end of the first radiator includes a fourth connection point, the first end of the third electronic component is coupled to the fourth connection point, and the second end of the third electronic component is coupled to the floor.

3. The electronic device according to claim 1 or 2, characterized in that: The first connection point coincides with the second connection point, and / or the third connection point coincides with the feeding point.

4. The electronic device according to any one of claims 1 to 3, characterized in that: The first electronic component is a capacitive component, Based on the fact that the center frequency of the first operating frequency band is less than or equal to 1 GHz, the equivalent capacitance value of the first electronic component is greater than 3 pF and less than or equal to 5 pF, Based on the fact that the center frequency of the first operating frequency band is greater than 1 GHz and less than or equal to 3 GHz, the equivalent capacitance value of the first electronic component is greater than 0.5 pF and less than or equal to 3 pF, Based on the fact that the center frequency of the first operating frequency band is greater than 3 GHz, the equivalent capacitance value of the first electronic component is less than or equal to 0.5 pF, or, The first electronic component is an inductive component, and an equivalent inductance value of the first electronic component is less than or equal to 3nH.

5. The electronic device according to any one of claims 1 to 4, characterized in that: The second electronic component is a capacitive component, Based on the fact that the center frequency of the first operating frequency band is less than or equal to 1 GHz, the equivalent capacitance value of the second electronic component is greater than 1.5 pF and less than or equal to 2 pF, Based on the fact that the center frequency of the first operating frequency band is greater than 1 GHz and less than or equal to 3 GHz, the equivalent capacitance value of the second electronic component is greater than 0.5 pF and less than or equal to 1.5 pF, Based on the fact that the center frequency of the first operating frequency band is greater than 3 GHz, the equivalent capacitance value of the second electronic component is less than or equal to 0.5 pF.

6. The electronic device according to any one of claims 1 to 5, characterized in that: The first position and the second position are located at a first side of the frame; The length of the frame between the first position and the center position of the first side is the same as the length of the frame between the second position and the center position of the first side.

7. The electronic device according to claim 6, characterized in that: The electronic device further comprises a charging interface; The first side is a bottom side of the electronic device, and a portion of the charging interface is located between the first position and the second position.

8. The electronic device according to any one of claims 1 to 7, characterized in that: Based on the fact that the first operating frequency band includes at least a portion of the frequency band of 1710 MHz-2170 MHz, a frequency difference between the resonance point frequency of the first resonance and the resonance point frequency of the second resonance is greater than or equal to 150 MHz and less than or equal to 240 MHz; Based on the fact that the first working frequency band includes at least a part of the frequency band of 2300 MHz-2690 MHz, the frequency difference between the resonance point frequency of the first resonance and the resonance point frequency of the second resonance is greater than or equal to 200 MHz and less than or equal to 300 MHz.

9. The electronic device according to any one of claims 1 to 8, characterized in that: The first electronic component includes a first switch and a plurality of first capacitors; The first switch and the first capacitor are connected in series and coupled between the first connection point and the floor.

10. The electronic device according to any one of claims 1 to 9, characterized in that: The second electronic component includes a second switch and a plurality of second capacitors; The second switch and the second capacitor are connected in series and coupled between the second connection point and the third connection point.

11. The electronic device according to any one of claims 1 to 10, characterized in that: At the resonance point of the first resonance, the current on the first radiator and the current on the second radiator are in the same direction; At the resonance point of the second resonance, the current on the first radiator and the current on the second radiator are in the same direction.

12. The electronic device according to any one of claims 1 to 11, characterized in that: At the resonance point of the first resonance, the intensity of the current on the first radiator is greater than the intensity of the current on the second radiator; At the resonance point of the second resonance, the intensity of the current on the first radiator is smaller than the intensity of the current on the second radiator.

13. The electronic device according to claim 2, characterized in that: The equivalent capacitance value of the third electronic component is less than or equal to 1 pF.

14. The electronic device according to any one of claims 1 to 13, characterized in that: The length L1 of the first radiator and the length L2 of the second radiator satisfy: L1×80%≤L2≤L1×120%.

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