Electronic equipment

Abstract

The embodiment of 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. Feed parts are arranged on one side of the radiator at intervals, and the antenna feeds electric signals into the radiator in an indirect coupling mode. The feed element can additionally generate resonance, and the resonance can improve the radiation characteristic of the antenna, so that the electronic equipment has good communication performance.

Description

Technical Field

[0001] This application relates to the field of wireless communication, and particularly to an electronic device. Background Art

[0002] With the increasing demand for high-speed data transmission, the development trend of the industrial design (ID) of electronic devices is a large screen ratio and multiple cameras. This has caused a significant reduction in the antenna clearance, and the layout space is becoming more and more limited.

[0003] In the current state, the communication frequency bands of electronic devices will still coexist with the third-generation mobile communication technology (3G), the fourth-generation mobile communication technology (4G), and the fifth-generation mobile communication technology (5G) frequency bands for a long time, and the number of antennas required is increasing.

[0004] However, expanding the efficiency bandwidth of the antenna by traditional means such as increasing the size of the radiator of the antenna has reached a bottleneck. Therefore, it has become an urgent task to improve the efficiency bandwidth of the antenna while keeping the size of the radiator unchanged. Summary of the Invention

[0005] This application provides an electronic device, including an antenna. The antenna uses the conductive part of the frame of the electronic device as a radiator. A feeding element is arranged at intervals on one side of the radiator, and the antenna feeds an electrical signal into the radiator in an indirect coupling manner. The feeding element can additionally generate resonance, and this resonance can improve the radiation characteristics of the antenna, so that the electronic device has good communication performance.

[0006] In a first aspect, an electronic device is provided, including: a floor; a frame, the frame including a first position and a second position, the frame being directly electrically connected to the floor at the first position; the frame having a first insulating gap at the second position; an antenna, the antenna including: a first radiator, the first radiator being a conductive portion of the frame between the first position and the second position, the first radiator being spaced from the floor; a feeding member, the feeding member being spaced from the first radiator, a first end of the feeding member extending towards the first position, the extending direction of the feeding member being the same as the extending direction of the first radiator, the first end and the second end of the feeding member being open ends; a feeding circuit, the feeding member including a feeding point, the feeding circuit being coupled to the feeding point; wherein, the ratio of the length of the feeding member between the feeding point and the first end of the feeding member to the length of the feeding member between the feeding point and the second end of the feeding member is greater than or equal to 4; the length of the frame between the projection of the feeding point on the frame and the second position is less than or equal to one quarter of the length of the first radiator.

[0007] According to an embodiment of the present application, the first end (the end at the first position) of the first radiator is a grounding end, and the second end (the end at the second position) is an open end. There is a strong current and a weak electric field near the first end of the first radiator. There is a strong electric field and a weak current near the second end of the first radiator.

[0008] The first end (the end far from the feeding point and extending towards the first position) and the second end (the end close to the feeding point and the second position) of the feeding member are open ends. There are strong electric fields and weak currents near the first end and the second end of the feeding member. However, since the feeding point is close to the second end of the feeding member, the area near the first end of the feeding member is a high-impedance area, and the area near the second end is a low-impedance area. Therefore, the electric field near the first end of the feeding member is stronger than the electric field near the second end, and there is a stronger electric field near the first end of the feeding member.

[0009] The first end of the first radiator is close to the first end of the feeding member, and the area with a weak electric field (strong magnetic field) of the first radiator is close to the area with a strong electric field (strong magnetic field) of the feeding member, which can make the antenna have better radiation characteristics, thereby enabling the electronic device to have better communication performance.

[0010] In combination with the first aspect, in some implementation manners of the first aspect, the first radiator and the feeding member are used to generate a first resonance, and the resonance frequency band of the first resonance includes a first communication frequency band; the feeding member is further used to generate a second resonance, and the second resonance is used to improve the radiation efficiency of the first communication frequency band.

[0011] According to the embodiments of the present application, the region with a weaker electric field (stronger magnetic field) of the first radiator is close to the region with a stronger electric field (stronger magnetic field) of the feeding element, which can make the first resonance and the second resonance more balanced, and the second resonance will not produce a pit in the radiation efficiency. At the same time, since the feeding element can generate the second resonance, part of the current on the first radiator can be coupled to the feeding element, expanding the current path, which can equivalently increase the radiation aperture of the antenna, thereby improving the radiation characteristics of the antenna and enabling the electronic device to have better communication performance.

[0012] In combination with the first aspect, in some implementation manners of the first aspect, the frequency difference between the resonance point frequency of the first resonance and the resonance point frequency of the second resonance is less than or equal to 500 MHz.

[0013] According to the embodiments of the present application, the resonance point of the second resonance may be within the first communication band or outside the first communication band (for example, higher than the resonance point frequency of the first resonance or lower than the resonance point frequency of the first resonance). The embodiments of the present application do not limit this. When the frequency difference between the resonance point frequency of the first resonance and the resonance point frequency of the second resonance is within the above range, the antenna can have better radiation characteristics.

[0014] In combination with the first aspect, in some implementation manners of the first aspect, the frame further includes a third position. The first position, the second position, and the third position are sequentially arranged on the frame, and the frame has a second insulating gap at the third position; the antenna further includes: a second radiator, the second radiator includes the conductive part of the frame between the second position and the third position, and the length L1 of the first radiator and the length L2 of the second radiator satisfy: 0.5×L2<L1<1.5×L2; a first electronic component and a second electronic component. The first end of the first radiator includes a first connection point, the first end of the second radiator includes a first connection point and a second 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 second connection point, the first end of the second electronic component is coupled to the third connection point, the second end of the second electronic component is coupled to the ground plane, and the first end of the first radiator and the first end of the second radiator are opposite and do not contact each other through the first insulating gap.

[0015] In combination with the first aspect, in some implementation manners of the first aspect, the feeding element, the first radiator, and the second radiator are used to generate the first resonance and the third resonance, and the first resonance and the third resonance are used to jointly support the first communication band.

[0016] According to the embodiments of the present application, due to the provision of the second radiator, the first electronic component, and the second electronic component, when an electrical signal is fed into the feeding circuit, the antenna can additionally generate a third resonance, and the working bandwidth of the antenna is extended by the first resonance and the third resonance to jointly support the first communication frequency band of the electronic device.

[0017] Combined with the first aspect, in some implementation manners of the first aspect, the second end of the second radiator includes a fourth connection point, and the fourth connection point is coupled to the ground plane, or a third electronic component is electrically connected between the fourth connection point and the ground plane.

[0018] According to the embodiments of the present application, the third electronic component can be used to simultaneously determine the radiation characteristics (e.g., the resonant point frequency of the resonance) when the antenna generates the first resonance and the third resonance. The fourth connection point can be coupled to the ground plane, and no electronic component is provided between the fourth connection point and the ground plane.

[0019] Combined with the first aspect, in some implementation manners of the first aspect, the first electronic component is a capacitive component. Based on the center frequency of the first communication frequency band being less than or equal to 1 GHz, the equivalent capacitance value of the first electronic component is greater than 1.5 pF and less than or equal to 2 pF. Based on the center frequency of the first communication 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 1.5 pF, or the first electronic component is an inductive component, and the equivalent inductance value of the second electronic component is less than or equal to 10 nH.

[0020] Combined with the first aspect, in some implementation manners of the first aspect, the second electronic component is a capacitive component. Based on the center frequency of the first communication frequency band being less than or equal to 1 GHz, the equivalent capacitance value of the second electronic component is greater than 3 pF and less than or equal to 5 pF. Based on the center frequency of the first communication 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 3 pF. Based on the center frequency of the first communication 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, or the second electronic component is an inductive component, and the equivalent inductance value of the second electronic component is less than or equal to 3 nH.

[0021] According to the embodiments of the present application, the first electronic component can be used to determine the radiation characteristics (e.g., the resonant point frequency of the resonance) when the antenna generates the first resonance. The second electronic component can be used to adjust the grounding state of the first end of the second radiator, thereby determining the radiation characteristics (e.g., the resonant point frequency of the resonance) when the antenna generates the third resonance.

[0022] In combination with the first aspect, in certain implementations of the first aspect, the second position and the third position are located on the first side of the frame; the length of the frame between the first position and the central position of the first side is the same as the length of the frame between the second position and the central position of the first side.

[0023] In combination with the first aspect, in certain implementations of the first aspect, the electronic device further includes a charging interface; the first side is the bottom side of the electronic device, and a part of the charging interface is located between the second position and the third position.

[0024] According to the embodiments of the present application, when the charging interface is charging, a strong current will be generated near the charging interface. Since a part of the charging interface is located on the second radiator, and the feeding member of the antenna is close to the first radiator, the charging of the charging interface has a relatively small impact on the radiation characteristics of the antenna. In combination with the first aspect, in certain implementations of the first aspect, the first communication frequency band includes at least part of the frequency band from 1710 MHz to 2170 MHz, and at least part of the frequency band from 2300 MHz to 2690 MHz.

[0025] According to the embodiments of the present application, the antenna can operate in the medium-frequency band and the high-frequency band in the cellular network.

[0026] In combination with the first aspect, in certain 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 second connection point.

[0027] In combination with the first aspect, in certain 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 third connection point and the ground plane.

[0028] According to the embodiments of the present application, the first electronic component / second electronic component can be an adjustable component to switch the resonant point frequency of the resonance.

[0029] In combination with the first aspect, in certain implementations of the first aspect, at the resonant 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 resonant point of the second resonance, the current on the first radiator and the current on the second radiator are in the same direction.

[0030] According to the embodiments of the present application, the first resonance and the third resonance can both be generated by the slot CM mode.

[0031] In combination with the first aspect, in some 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;

[0032] 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.

[0033] In combination with the first aspect, in some implementations of the first aspect, the equivalent capacitance value of the third electronic component is less than or equal to 1 pF.

[0034] 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%.

[0035] In combination with the first aspect, in some implementations of the first aspect, the distance D between the first radiator and the feeding element is less than or equal to 5 mm.

[0036] In combination with the first aspect, in some implementations of the first aspect, the distance D between the first radiator and the feeding element is greater than or equal to 0.5 mm.

[0037] According to the embodiments of the present application, when the distance between the first radiator and the feeding element is within the above range, good coupling characteristics can be achieved between the first radiator and the feeding element. Description of the Drawings

[0038] Figure 1 is a schematic diagram of an electronic device 10 provided by the embodiments of the present application.

[0039] Figure 2 is a distribution diagram of the structure, corresponding current, electric field, and magnetic current of the common mode of the antenna provided by the present application.

[0040] Figure 3 is a distribution diagram of the structure, corresponding current, electric field, and magnetic current of the differential mode of the antenna provided by the present application.

[0041] Figure 4 is a schematic diagram of an antenna 200 provided by the embodiments of the present application.

[0042] Figure 5 is Figure 4 a schematic diagram of the current distribution of the antenna 200 shown at the first resonance.

[0043] Figure 6 is Figure 4 a schematic diagram of the current distribution of the antenna 200 shown at the second resonance.

[0044] Figure 7 is Figure 4 The simulation results of the S parameters, radiation efficiency, and system efficiency of the antenna 200 shown in

[0045] Figure 8 Another schematic diagram of the electronic device 10 provided by an embodiment of the present application.

[0046] Figure 9 Another schematic diagram of the electronic device 10 provided by an embodiment of the present application.

[0047] Figure 10 Another schematic diagram of the electronic device 10 provided by an embodiment of the present application.

[0048] Figure 11 Another schematic diagram of the electronic device 10 provided by an embodiment of the present application.

[0049] Figure 12 Another schematic diagram of the electronic device 10 provided by an embodiment of the present application.

[0050] Figure 13 is Figure 10 The Smith chart of the antenna 200 in the electronic device 10 shown in

[0051] Figure 14 is Figure 10 The S parameter simulation results of the antenna 200 in the electronic device 10 shown in

[0052] Figure 15 is Figure 10 The radiation efficiency simulation results of the antenna 200 in the electronic device 10 shown in Detailed implementation manners

[0053] Next, the technical solutions in the present application will be described in conjunction with the accompanying drawings.

[0054] It should be understood that the term "and / or" used herein is only a description of the same fields of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0055] When the present application uses "within... range", unless it is separately pointed out that the end values are not included, it is default to include the two end values of the range. For example, within the range of 1 to 5, the two values 1 and 5 are included.

[0056] Coupling: It can be understood as direct coupling and / or indirect coupling. "Coupling 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 physical contact and electrical conduction between components; it can also be understood as a form of connection between different components in a circuit structure through physical lines such as copper foils or wires of a printed circuit board (PCB) that can transmit electrical signals. "Indirect coupling" can be understood as electrical conduction between two conductors in a non-contact manner through air separation. In one embodiment, indirect coupling can also be called capacitive coupling. For example, signal transmission is achieved by forming an equivalent capacitance through the coupling between the gaps of two separated conductive parts.

[0057] Element / device: Includes at least one of lumped elements / devices and distributed elements / devices.

[0058] Lumped element / device: It refers to the general term for all elements when the size of the element is much smaller than the wavelength corresponding to the operating frequency of the circuit. For a signal, at any moment, the characteristics of the element always remain fixed and are independent of frequency.

[0059] Distributed element / device: Different from lumped elements, when the size of the element is about the same as or larger than the wavelength corresponding to the operating frequency of the circuit, when a signal passes through the element, the characteristics of each point of the element itself will vary with the change of the signal. At this time, the element as a whole cannot be regarded as a single entity with fixed characteristics, but should be called a distributed element.

[0060] Capacitance: It can be understood as lumped capacitance and / or distributed capacitance. Lumped capacitance refers to capacitive components, such as capacitor elements; distributed capacitance (or distributed capacitor) refers to the equivalent capacitance formed by a certain gap between two conductive parts.

[0061] Inductance: It can be understood as lumped inductance and / or distributed inductance. Lumped inductance refers to inductive components, such as inductor elements; distributed inductance (or distributed inductor) refers to the equivalent inductance formed by a conductive part of a certain length.

[0062] Radiator: It is a device in an antenna used to receive / transmit electromagnetic wave radiation. In some cases, "antenna" is narrowly understood as a radiator, which converts the guided wave energy from a transmitter into radio waves, or converts radio waves into guided wave energy to radiate and receive radio waves. The modulated high-frequency current energy (or guided wave energy) generated by the transmitter is transmitted to the transmitting radiator through a feeder line. Through the radiator, it is converted into electromagnetic wave energy of a certain polarization and radiated in the required direction. The receiving radiator converts the electromagnetic wave energy of a certain polarization from a specific direction in space back into modulated high-frequency current energy and transmits it to the input end of the receiver through a feeder line.

[0063] The radiator may include a conductor with a specific shape and size, such as linear or sheet-like, etc. The present application does not limit the specific shape. In one embodiment, the linear radiator may be simply referred to as a wire 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 support conductor and may also be referred to as a support antenna. In one embodiment, the wire diameter (e.g., including thickness and width) of the linear radiator, or the radiator of the wire antenna, is much smaller than the wavelength (e.g., the dielectric wavelength) (e.g., less than 1 / 16 of the wavelength), and the length can be comparable to the wavelength (e.g., the dielectric wavelength) (e.g., the length is around 1 / 8 of the wavelength, or 1 / 8 to 1 / 4, or 1 / 4 to 1 / 2, or longer). The main forms of wire antennas include dipole antennas, half-wave dipole antennas, monopole antennas, loop antennas, 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 part from the feeding end of the radiating branch. For example, an inverted-F antenna (Inverted-F Antenna, IFA) can be regarded as obtained by adding a grounding path to a monopole antenna. The IFA antenna has a feeding point and a grounding point and is called an inverted-F antenna because its side view is in the shape of an inverted F. 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 F Antenna). 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 silver paste, etc. The shape of the sheet radiator includes circular, rectangular, annular, etc. The present application does not limit the specific shape. The structure of a microstrip antenna generally consists of a dielectric substrate, a radiator, and a ground plane, where the dielectric substrate is disposed between the radiator and the ground plane.

[0064] The radiator may also include grooves or slits formed on a conductor. For example, closed or semi-closed grooves or slits are formed on a grounded conductor surface. In one embodiment, the slotted or slit radiator may be simply referred to as a slot antenna or a slotted antenna. In one embodiment, the radial dimension (e.g., including the width) of the slot or slit of the slot antenna / slotted 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 around 1 / 8 of the wavelength, or 1 / 8 to 1 / 4, or 1 / 4 to 1 / 2, or longer). In one embodiment, the radiator with a closed slot or slit may be simply referred to as a closed slot antenna. In one embodiment, the radiator with a semi-closed slot or slit (e.g., adding an opening to a closed slot or slit) may be simply referred to as an open slot antenna. In some embodiments, the shape of the slit is elongated. In some embodiments, the length of the slit is about half a wavelength (e.g., the dielectric wavelength). In some embodiments, the length of the slit is about an integer multiple of the wavelength (e.g., one dielectric wavelength). In some embodiments, the slit can be fed by a transmission line bridging one or both of its sides. Thus, a radio frequency electromagnetic field is excited on the slit, and electromagnetic waves are radiated into space. In one embodiment, the radiator of the slot antenna or the slotted antenna can be implemented by a conductive frame grounded at both ends, and can also be referred to as a frame antenna; in this embodiment, it can be considered that the slot antenna or the slotted antenna includes a linear radiator, the linear radiator is spaced from the floor and grounded at both ends of the radiator, thereby forming a closed or semi-closed slot or slit. In one embodiment, the radiator of the slot antenna or the slotted antenna can be implemented by a support conductor grounded at both ends, and can also be referred to as a support antenna.

[0065] The feeding circuit is a combination of all circuits for receiving and transmitting radio frequency signals. The feeding circuit may include a transceiver and a radio frequency front-end circuit (RF front end). In some cases, "feeding circuit" is narrowly understood as a radio frequency integrated circuit (RFIC), and the RFIC can be considered to include a radio frequency front-end chip and a transceiver. The feeding 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.

[0066] 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). This test socket can 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 can be considered as the circuit part coupled between the test socket and the transceiver.

[0067] In some embodiments, the radio frequency front-end circuit can be integrated into a radio frequency front-end chip in an electronic device, or the radio frequency front-end circuit and the transceiver can be integrated into a radio frequency chip in the electronic device.

[0068] 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, signals can be transmitted through a radio frequency channel in a transceiver (e.g., a port (pin) of a radio frequency chip); they can also share a radio frequency front-end circuit. For example, signals can be processed by a switch or an amplifier in a radio frequency front-end.

[0069] It should also be understood that two of the first / second / ... / Nth feeding circuits in the present application generally correspond to two radio frequency test sockets in an electronic device.

[0070] 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 feeding 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 ground plane. In one embodiment, the matching circuit can include switches and / or electronic components. The switch can be an electronic component for switching the coupling connection of the radiator. The matching circuit has the functions of impedance matching and / or frequency tuning. Generally, it is considered to be part of the antenna.

[0071] The grounding structure / feeding structure. The grounding structure / feeding structure can include connecting components, such as metal shrapnel. The radiator is coupled to the ground plane through the grounding structure / the feeding structure is coupled to the feeding circuit. In some embodiments, the feeding structure can include a transmission line / feeding wire, and the grounding structure can include a grounding wire.

[0072] The 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 should not be narrowly understood as an endpoint or end that is physically disconnected from other radiators. It can also be considered as a certain point or a certain section on the continuous radiator. In one embodiment, the "end / point" can include the connection / coupling area on the antenna radiator that is coupled to other conductive structures. For example, the feeding end / feeding point can be the coupling area on the antenna radiator that is coupled to the feeding structure (e.g., the area facing a part of the feeding structure), and for another example, the grounding end / grounding point can be the connection / coupling area on the antenna radiator that is coupled to the grounding structure.

[0073] Open end, closed end: In some embodiments, the open end and the closed end are, for example, defined 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, defined relative to other conductive bodies. The closed end is electrically connected to other conductive bodies, and the open end is not electrically connected to other conductive bodies. In one embodiment, the open end can also be referred to as a floating 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 conductive bodies can be coupled to the open end to transfer coupled energy (which can be understood as transferring current).

[0074] In some embodiments, the understanding of the "closed end" can also be from the perspective of current distribution. The closed end or the grounded end, etc., can be understood as the current maxima on the radiator, or the electric field minima on the radiator. In one embodiment, coupling electronic devices (such as capacitors, inductors, etc.) through the closed end can not change the current distribution characteristics of its current maxima / electric field minima. In one embodiment, opening a slit at or near the closed end (such as a slit filled with an insulating material) can not change the current distribution characteristics of its current maxima / electric field minima.

[0075] In some embodiments, the understanding of the "open end" can also be from the perspective of current distribution. The open end or the floating end, etc., can be understood as the current minima on the radiator, or the electric field maxima on the radiator. In one embodiment, coupling electronic devices (such as capacitors, inductors, etc.) through the open end can not change the current distribution characteristics of its current minima / electric field maxima.

[0076] It should be understood that coupling an electronic device (such as a capacitor, an inductor, etc.) to the radiator end at a slit (viewed from the structure of the radiator, similar to the opening of an open end or a floating end) can make the radiator end a current maximum / electric field minimum. In this case, it should be understood that the radiator end at the slit is actually a closed end or a grounded end, etc.

[0077] The "floating radiator" mentioned in the embodiments of the present application refers to a radiator that is not directly connected to the feeder / feeding stub and / or the ground wire / grounding stub, but is fed and / or grounded through an indirect coupling method.

[0078] It should be understood that the "floating" in the "floating end" and the "floating radiator" does not mean that there is no structure around the radiator to support it. In one embodiment, the floating radiator can be, for example, a radiator disposed on the inner surface of an insulating rear cover.

[0079] Clearance: It refers to the distance between the radiator of the antenna and the metal or electronic components close to the radiator. For example, when a part of the metal frame of an electronic device serves 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 a camera).

[0080] The same / different directions of the current mentioned in the embodiments of the present application should be understood as the directions of the main current on the conductors on the same side being the same / different. For example, when exciting a current with a same-direction distribution (e.g., the current path is also bent or circular) on a bent or circular conductor, it should be understood that, for example, although the main currents excited on the two sides of the circular conductor (e.g., the conductors around a gap, on the two sides of the gap) seem to be in opposite directions, it still belongs to the definition of the current with a same-direction distribution in the embodiments of the present application. In one embodiment, the same direction of the current on a conductor can mean that there is no reverse point in the current on the conductor. In one embodiment, the reverse direction of the current on a conductor can mean that there is at least one reverse point in the current on the conductor. In one embodiment, the same direction of the currents on two conductors can mean that there is no reverse point in the currents on both of these two conductors and they flow in the same direction. In one embodiment, the reverse direction of the currents on two conductors can mean that there is no reverse point in the currents on both of these two conductors and they flow in opposite directions. The same / different directions of the currents on multiple conductors can be understood accordingly.

[0081] The same / different directions of the electric field mentioned in the embodiments of the present application should be understood as the directions of the main electric field (e.g., the electric field between the conductor and the floor) generated by the conductor in space being the same / different. For example, when exciting an electric field with a same-direction distribution (e.g., the gap formed between the floor and the conductor is also bent or circular) on a bent or circular conductor, it should be understood that, for example, the directions of the electric fields in the gap are all from the floor to the conductor, or from the conductor to the floor. Although the main electric fields excited in the gaps on both sides of the circular conductor (e.g., the conductors around a gap, in the gaps on both sides of the gap) seem to be in opposite directions, it still belongs to the definition of the electric field with a same-direction distribution in the embodiments of the present application. In one embodiment, the same direction of the electric field between a conductor and the floor can mean that there is no reverse point in the electric field between the conductor and the floor. In one embodiment, the reverse direction of the electric field between a conductor and the floor can mean that there is at least one reverse point in the electric field between the conductor and the floor. In one embodiment, the same direction of the electric fields between two conductors and the floor can mean that there is no reverse point in the electric fields between both of these two conductors and the floor and they radiate in the same direction (e.g., the positive direction of the z-axis). In one embodiment, the reverse direction of the electric fields between two conductors and the floor can mean that there is no reverse point in the electric fields between both of these two conductors and the floor and they flow in opposite directions. The same / different directions of the electric fields between multiple conductors and the floor can be understood accordingly.

[0082] Resonance / Resonant Frequency: The resonant frequency is also called the resonance frequency. The resonant 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. The return loss characteristic of the center frequency can be less than -20 dB. It should be understood that unless otherwise specified, when the antenna / radiator mentioned in this application generates "the first / second... resonance", the first resonance should be the fundamental mode resonance generated by the antenna / radiator, or in other words, the resonance with the lowest frequency generated by the antenna / radiator. It should be understood that the antenna / radiator can generate one or more antenna modes according to specific designs, and each antenna mode can correspondingly generate a fundamental mode resonance.

[0083] Resonant Frequency Band: The range of the resonant frequency is the resonant frequency band, and the return loss characteristic of any frequency point within the resonant frequency band can be less than -6 dB or -5 dB.

[0084] Communication Frequency Band / Operating Frequency Band: No matter what type of antenna, it always operates within a certain frequency range (bandwidth). For example, an antenna supporting Band B40 has an operating frequency band including frequencies in the range of 2300 MHz to 2400 MHz, or in other words, the operating frequency band of this antenna includes Band B40. The frequency range that meets the index requirements can be regarded as the operating frequency band of the antenna.

[0085] The resonant frequency band and the operating frequency band can be the same or can partially overlap. In one embodiment, one or more resonant frequency bands of the antenna can cover one or more operating frequency bands of the antenna.

[0086] Electrical Length: It can refer to the ratio of the physical length (i.e., the mechanical length or geometric length) to the wavelength of the electromagnetic wave transmitted. The electrical length can satisfy the following formula:

[0087]

[0088] where L is the physical length and λ is the wavelength of the electromagnetic wave.

[0089] Wavelength: Or the 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 the center frequency of the B1 uplink frequency band (resonant frequency is 1920 MHz to 1980 MHz) is 1955 MHz, then the operating wavelength can be the wavelength calculated using this frequency of 1955 MHz. Not limited to the center frequency, the "operating wavelength" can also refer to the wavelength corresponding to a non - center frequency of the resonant frequency or the operating frequency band.

[0090] It should be understood that the wavelength of the radiated signal in air can be calculated as follows: (air wavelength, or vacuum wavelength) = speed of light / frequency, where the frequency is the frequency of the radiated signal (MHz), and the speed of light can be taken as 3×10^8 m / s. The wavelength of the radiated signal in a 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 medium wavelength, which can be the medium wavelength corresponding to the center frequency of the resonant frequency or the medium wavelength corresponding to 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 from 1920 MHz to 1980 MHz) is 1955 MHz, the wavelength can be the medium wavelength calculated using the frequency of 1955 MHz. Not limited to the center frequency, the "medium wavelength" can also refer to the medium wavelength corresponding to a non-center frequency of the resonant frequency or the operating frequency band. For ease of understanding, the medium wavelength mentioned in the embodiments of the present application can be simply calculated by the relative dielectric constant of the medium filled on one side or multiple sides of the radiator.

[0091] Those skilled in the art can understand that efficiency is generally expressed as a percentage, and there is a corresponding conversion relationship between it and dB. The closer the efficiency is to 0 dB, the better the efficiency of the antenna is characterized.

[0092] Smith chart: It is a calculation chart with a family of constant circles of normalized input impedance (or admittance) plotted on the reflection coefficient plane. The chart consists of three families of circles, used to solve problems in transmission lines and certain waveguides by graphical methods to avoid cumbersome calculations.

[0093] Antenna system efficiency (total efficiency): It refers to the ratio of the input power to the output power at the port of the antenna.

[0094] Antenna radiation efficiency: It refers to the ratio of the power radiated by the antenna into space (i.e., the power effectively converted into electromagnetic waves) 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, the ohmic loss power of the metal, and / or the dielectric loss power. The radiation efficiency is a value measuring the radiation ability of the antenna, and both metal loss and dielectric loss are influencing factors of the radiation efficiency.

[0095] Those skilled in the art can understand that efficiency is generally expressed as a percentage, and there is a corresponding conversion relationship between it and dB. The closer the efficiency is to 0 dB, the better the efficiency of the antenna is characterized.

[0096] 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 transmitted power of the antenna port. The smaller the reflected signal, the larger the signal radiated into space through the antenna, and the larger the radiation efficiency of the antenna. The larger the reflected signal, the smaller the signal radiated into space through the antenna, and the smaller the radiation efficiency of the antenna.

[0097] The antenna return loss can be represented by the S11 parameter, and S11 is one of the S parameters. S11 represents the reflection coefficient, and this parameter can characterize the quality of the antenna transmission efficiency. The S11 parameter is usually negative. The smaller the S11 parameter, the smaller the antenna return loss, the smaller the energy reflected back by the antenna itself, which means that actually more energy enters the antenna and the system efficiency of the antenna is higher; the larger the S11 parameter, the larger the antenna return loss and the lower the system efficiency of the antenna.

[0098] It should be noted that in engineering, generally, an S11 value of -6 dB is used as the standard. When the S11 value of the antenna is less than -6 dB, it can be considered that the antenna can work normally, or it can be considered that the transmission efficiency of the antenna is good.

[0099] Ground (floor) (ground, GND): It can generally refer to at least a part of any ground layer, ground plane, or ground metal layer in an electronic device (such as a mobile phone), or at least a part of any combination of the above ground layer, ground plane, or ground component. "Ground" can be used for grounding components in an electronic device. In one embodiment, "ground" can be the ground layer of the circuit board of the electronic device, or the ground plane formed by the middle frame of the electronic device or the ground metal layer formed by the metal film under the screen. In one embodiment, the circuit board can be a printed circuit board (PCB), such as an 8-layer, 10-layer, or 12 - 14-layer board with 8, 10, 12, 13, or 14 layers of conductive material, or components separated and electrically insulated by dielectric layers or insulating layers such as fiberglass, polymers, etc. In one embodiment, the circuit board includes a dielectric substrate, a ground layer, and a trace layer, and the trace layer and the ground layer are electrically connected through vias. In one embodiment, components such as a display, a touch screen, an input button, a transmitter, a processor, a memory, a battery, a charging circuit, a system on chip (SoC) structure, etc. can be mounted on the circuit board or connected to the circuit board; or electrically connected to the trace layer and / or the ground layer in the circuit board. For example, a radio frequency source is arranged on the trace layer.

[0100] Any of the above ground layer, ground plane, or ground metal layer is made of a conductive material. In one embodiment, the conductive material can be any one 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 on an insulating substrate, tin-plated copper, cloth impregnated with graphite powder, graphite-coated substrate, copper-plated substrate, brass-plated substrate, and aluminum-plated substrate. Those skilled in the art can understand that the ground layer / ground plane / ground metal layer can also be made of other conductive materials.

[0101] Grounding: It refers to achieving coupling with the above-mentioned ground / floor in any way. In one embodiment, grounding can be through physical grounding, for example, through some structural components of the middle frame to achieve physical grounding at specific positions on the border (or called, physical ground). In one embodiment, grounding can be through device grounding, for example, through devices such as capacitors / inductors / resistors connected in series or parallel for grounding (or called, device ground).

[0102] Next, the technical solutions of the embodiments of the present application will be described with reference to the accompanying drawings.

[0103] As Figure 1 shown, the electronic device 10 may include: a cover 13, a display / display module 15, a printed circuit board (PCB) 17, a middle frame 19, and a rear cover 21. It should be understood that in some embodiments, the cover 13 may be a cover glass, or may be replaced by a cover made of other materials, such as a cover made of PET (Polyethylene terephthalate) material, etc.

[0104] Among them, the cover 13 can be arranged closely to the display module 15, and can mainly be used to protect the display module 15 and prevent dust.

[0105] In one embodiment, the display module 15 may include a liquid crystal display (LCD) panel, a light emitting diode (LED) display panel, an organic light-emitting diode (OLED) display panel, etc., and the embodiments of the present application do not limit this.

[0106] The middle frame 19 mainly plays a supporting role for the whole machine. Figure 1As shown, the PCB 17 is disposed between the middle frame 19 and the rear cover 21. It should be understood that, in one embodiment, the PCB 17 may also be disposed between the middle frame 19 and the display module 15, and the embodiments of the present application do not limit this. Among them, the printed circuit board PCB 17 may use a flame-retardant material (FR-4) dielectric board, or a Rogers dielectric board, or a mixed dielectric board of Rogers and FR-4, and so on. Here, FR-4 is a code for a flame-retardant material grade, and the Rogers dielectric board is a high-frequency board. Electronic components are carried on the PCB 17, for example, radio frequency chips, etc. In one embodiment, a metal layer may be provided on the printed circuit board PCB 17. This metal layer can be used for grounding the electronic components carried on the printed circuit board PCB 17, and can also be used for grounding other components, such as a bracket antenna, a frame antenna, etc. This metal layer can be called a floor, or a ground plane, or a ground layer. In one embodiment, this metal layer can be formed by etching metal on the surface of any layer of the dielectric board in the PCB 17. In one embodiment, the metal layer for grounding can be disposed on one side of the printed circuit board PCB 17 close to the middle frame 19. In one embodiment, the edge of the printed circuit board PCB 17 can be regarded as the edge of its ground layer. In one embodiment, the metal middle frame 19 can also be used for grounding the above-mentioned components. The electronic device 10 may also have other floors / ground planes / ground layers. As described above, details are not repeated here.

[0107] Among them, the electronic device 10 may further include a battery (not shown in the figure). The battery can be disposed between the middle frame 19 and the rear cover 21, or can be disposed between the middle frame 19 and the display module 15, and the embodiments of the present application do not limit this. In some embodiments, the PCB 17 is divided into a main board and a sub-board, and the battery can be disposed between the main board and the sub-board. Among them, the main board can be disposed between the middle frame 19 and the upper edge of the battery, and the sub-board can be disposed between the middle frame 19 and the lower edge of the battery.

[0108] The electronic device 10 may further include a frame 11, and the frame 11 can be formed of a conductive material such as metal. The frame 11 can be disposed between the display module 15 and the rear cover 21 and extend circumferentially around the periphery of the electronic device 10. The frame 11 can 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 can be directly used as the metal frame of the electronic device 10 to form the appearance of a metal frame, which is suitable for metal industrial design (ID). In another implementation, the outer surface of the frame 11 can also be a non-metal material, such as a plastic frame, to form the appearance of a non-metal frame, which is suitable for non-metal ID.

[0109] The middle frame 19 may include a side frame 11. The middle frame 19 including the side frame 11, being an integral part, can support the electronic devices in the whole machine. The cover plate 13 and the rear cover 21 respectively cover along the upper and lower edges of the side frame to form the outer shell or housing of the electronic device. In one embodiment, the cover plate 13, the rear cover 21, the side frame 11, and / or the middle frame 19 can be collectively referred to as the outer shell or housing of the electronic device 10. It should be understood that the "outer shell or housing" can be used to refer to a part or all of any one of the cover plate 13, the rear cover 21, the side frame 11, or the middle frame 19, or refer to a part or all of any combination of the cover plate 13, the rear cover 21, the side frame 11, or the middle frame 19.

[0110] The side frame 11 on the middle frame 19 can at least partially serve as an antenna radiator to receive / transmit radio frequency signals. There may be a gap between this part of the side frame serving as the radiator and other parts of the middle frame 19, so as to ensure that the antenna radiator has a good radiation environment. In one embodiment, the middle frame 19 may be provided with apertures at this part of the side frame serving as the radiator to facilitate the radiation of the antenna.

[0111] Alternatively, the side frame 11 may not be regarded as a part of the middle frame 19. In one embodiment, the side frame 11 may be connected to and integrally formed with the middle frame 19. In another embodiment, the side frame 11 may include a protruding member extending inward to be connected to the middle frame 19. For example, it may be connected by means of a spring piece, a screw, welding, etc. The protruding member of the side frame 11 can also be used to receive a feeding signal, so that at least a part of the side frame 11 serves as an antenna radiator to receive / transmit radio frequency signals. There may be a gap 42 between this part of the side frame serving as the radiator and the middle frame 30, so as to ensure that the antenna radiator has a good radiation environment and the antenna has a good signal transmission function.

[0112] Among them, the rear cover 21 can be a rear cover made of a metal material; it can also be a rear cover made of a non-conductive material, such as a glass rear cover, a plastic rear cover and other non-metal rear covers; it can also be a rear cover made of both conductive material and non-conductive material. In one embodiment, the rear cover 21 including the conductive material can replace the middle frame 19 and, together with the side frame 11 as an integral part, support the electronic devices in the whole machine.

[0113] It should be understood that insulating gaps can be provided on the frame 11. The conductor portions of the frame between two insulating gaps or between an insulating gap and a ground point can serve as radiators, thereby forming a frame antenna. Among them, when the frame 11 is formed of a conductive material such as metal, the insulating gap can be understood as a gap opened in the frame 11 filled with a non-metallic material (insulating material). And this gap is visible on the appearance surface. When the outer surface of the frame 11 is a non-conductive material, the insulating gap can be understood as a gap separating the conductor portions inside the frame 11. This gap can be filled with a non-metallic material (insulating material), or it can also be unfilled and filled with air. And this gap is not visible on the appearance surface.

[0114] In one embodiment, the conductive portions in the middle frame 19 and / or the rear cover 21 can serve as the reference ground of the electronic device 10. Among them, the frame 11, the PCB 17, etc. of the electronic device can be grounded through electrical connection with the middle frame.

[0115] The antenna of the electronic device 10 can also be disposed inside the frame 11. When the frame 11 of the electronic device 10 is a non-conductive material, the antenna radiator can be located inside the electronic device 10 and extend along the frame 11. For example, the antenna radiator is disposed close to the frame 11 to minimize the volume occupied by the antenna radiator and be closer to the outside of the electronic device 10 to achieve a better signal transmission effect. It should be noted that the antenna radiator being disposed close to the frame 11 means that the antenna radiator can be disposed closely against the frame 11 or close to the frame 11. For example, there can be a certain small gap between the antenna radiator and the frame 11.

[0116] The antenna of the electronic device 10 can also be disposed inside the housing, such as a bracket antenna, a millimeter-wave antenna, etc. ( Figure 1 not shown in the figure). The clearance of the antenna disposed inside the housing can be obtained by a slit / hole on any one of the middle frame, and / or the frame, and / or the rear cover, and / or the display screen, or by a non-conductive gap / aperture formed between any several 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 component inside the electronic device 10, and the antenna radiates signals to the external space through this non-conductive area. In one embodiment, the form of the antenna 40 can be an antenna form based on a flexible printed circuit (FPC), an antenna form based on laser-direct-structuring (LDS), or a microstrip disk antenna (MDA), etc. In one embodiment, the antenna can also adopt a transparent structure embedded inside the screen of the electronic device 10, such that the antenna is a transparent antenna unit embedded inside the screen of the electronic device 10.

[0117] Figure 1 Only some components included in the electronic device 10 are schematically shown, and the actual shapes, actual sizes, and actual structures of these components are not limited by Figure 1 defined.

[0118] 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 regarded as the front surface, the surface where the back cover is located can be regarded as the back surface, and the surface where the frame is located can be regarded as the side surface.

[0119] It should be understood that in the embodiments of the present application, when the user holds (usually vertically and facing the screen) the electronic device, the orientation of the electronic device has 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 holds (usually vertically and facing the screen) the electronic device, the orientation of the electronic device has a top, a bottom, a left side, and a right side.

[0120] First, Figure 2 and Figure 3 will be used to introduce four antenna modes involved in the present application. Among them, Figure 2 is a schematic diagram of the structure of a common mode of an antenna provided by the present application and the corresponding current and electric field distributions. Figure 3 is a schematic diagram of the structure of a differential mode of another antenna provided by the present application and the corresponding current and electric field distributions. Figure 2 and Figure 3 The two ends of the antenna radiator in are open, and its common mode and differential mode can be respectively called line common mode and line differential mode.

[0121] 1. Slot CM mode

[0122] Figure 2 In the (a) shown in , the radiator of the antenna 60 has a hollowed-out slot or gap 61, or it can be that the radiator of the antenna 60 and the ground (such as the floor, which can be the PCB) enclose the slot or slot 61. The slot 61 can be formed by opening a slot on the floor. An opening 62 is provided on one side of the slot 61, and the opening 62 can be specifically opened at the middle position of this side. The middle position of this 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 this side. The feeding circuit can be connected at the opening 62, and anti-symmetric feeding is adopted. It should be understood that anti-symmetric feeding can be understood as that the positive and negative poles of the feeding circuit are respectively connected to the two ends of the radiator. The signal amplitudes output by the positive and negative poles of the feeding circuit are the same, and the phases are opposite, for example, the phase difference is 180°±10°.

[0123] Figure 2 In the (b) shown in , the current, electric field, and magnetic current distributions of the antenna 60 are shown. As Figure 2As shown in (b) thereof, the current is distributed in the same direction around the slot 61 on conductors (such as the floor and / or the radiator 60) around the slot 61, the electric field is distributed in the opposite direction on both sides of the middle position of the slot 61, and the magnetic current is distributed in the opposite direction on both sides of the middle position of the slot 61. As Figure 2 shown in (b) thereof, the electric fields at the openings 62 (e.g., the feeding points) are in the same direction, and the magnetic currents at the openings 62 (e.g., the feeding points) are in the same direction. Based on the magnetic currents at the openings 62 (feeding points) being in the same direction, Figure 2 the feeding as shown in (a) thereof can be referred to as slot CM feeding. Based on the current being distributed in the same direction (e.g., anti-symmetrically distributed) 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 pattern as shown in (b) thereof can be referred to as the slot CM pattern (which can also be simply referred to as the CM pattern. For example, for a slot antenna, the CM pattern refers to the slot CM pattern). Figure 2 The electric field, current, and magnetic current distributions as shown in (b) thereof can be referred to as the electric field, current, and magnetic current of the slot CM pattern.

[0124] The magnetic field is weak at the middle position of the antenna 60 and strong at both ends of the antenna 60. The electric field is strong at the middle position of the antenna 60 (the electric field maximum point is near the middle position of the antenna 60) and weak at both ends of the antenna 60, as Figure 2 shown in (b) thereof.

[0125] 2. Slot DM pattern

[0126] As Figure 3 shown in (a) thereof, the radiator of the antenna 70 has a hollowed slot or slit 72, or it can be that the radiator of the antenna 70 and the ground (such as the floor, which can be a PCB) enclose the slot or the slot 72. The slot 72 can be formed by opening a slot on the floor. A feeding circuit is connected to the middle position 71 of the slot 72, and symmetric feeding is adopted. It should be understood that symmetric 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 (feeding point) of the feeding circuit and the radiator is located at the center of the radiator. The center of the radiator, for example, can be the midpoint of the geometric structure, or the midpoint of the electrical length (or a region 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. For example, the connection of the feeding circuit and the radiator covers the middle position 51 of this side.

[0127] Figure 3 shown in (b) thereof shows the current, electric field, and magnetic current distributions of the antenna 70. As Figure 3As shown in (b) thereof, on the conductors (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 fact that the magnetic current at the feeding circuit is distributed in opposite directions, Figure 3 such feeding as shown in (a) thereof can be referred to as slot DM feeding. Based on the fact that the current is distributed in opposite directions (e.g., symmetrically distributed) on both sides of the connection between the feeding circuit and the radiator, or based on the fact that the current is distributed in opposite directions (e.g., symmetrically distributed) around the slit 71, Figure 3 such an antenna pattern as shown in (b) thereof can be referred to as the slot DM pattern (which can also be simply referred to as the DM pattern. For example, for a slot antenna, the DM pattern refers to the slot DM pattern). Figure 3 The electric field, current, and magnetic current distributions as shown in (b) thereof can be referred to as the electric field, current, and magnetic current of the slot DM pattern.

[0128] The current is weaker at the middle position of the antenna 70 and stronger at both ends of the antenna 70. The electric field is stronger at the middle position of the antenna 70 (the electric field maximum is near the middle position of the antenna 60) and weaker at both ends of the slot antenna 70, as Figure 3 shown in (b) thereof.

[0129] It should be understood that for the radiator of the antenna, it can be understood as a metal structural member that generates radiation (such as including a part of the floor), and it can include an opening, as Figure 2 shown, or it can also be a complete ring, as Figure 3 shown, and it can be adjusted according to actual design or production needs. For example, for the slot CM pattern, a complete ring radiator can also be used as Figure 3 shown. Two feeding points are set at the middle position of the radiator on one side of the slot 61 and anti-symmetric feeding is adopted. For example, signals with the same amplitude and opposite phases are fed into both ends of the original opening position respectively, and similar effects to the Figure 2 shown antenna structure can also be obtained. Correspondingly, for the slot DM pattern, a radiator including an opening can also be used as Figure 2 shown. Symmetric feeding is adopted at both ends of the opening position. For example, the same feed source signal is fed into both ends of the radiator on both sides of the opening respectively, and similar effects to the Figure 3 shown antenna structure can also be obtained.

[0130] 3. Slot CM-DM pattern.

[0131] The above Figure 2 and Figure 3 respectively show that different feeding methods are adopted for the slot structure to generate the slot CM pattern and the slot DM pattern respectively.

[0132] When the feeding form of the antenna adopts asymmetric feeding (the feeding point deviates from the middle position, including edge feeding or offset feeding), or the opening on one side of the slot is asymmetric (the opening deviates from the middle position of that side), the antenna can simultaneously generate a first resonance and a 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 distributions are as shown in Figure 2 (b) in Figure 3 . The second resonance corresponds to the slot DM mode, and the current, electric field, and magnetic current distributions are as shown in

[0133] Figure 4 is a schematic diagram of an antenna 200 provided by an embodiment of the present application.

[0134] As Figure 4 shown, the antenna 200 includes a first radiator 210 and a second radiator 220.

[0135] Among them, the first end of the first radiator 210 and the first end of the second radiator 220 face each other and are not in contact. 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 grounded end.

[0136] The antenna 200 may further include a first electronic component 231, a second electronic component 232, and a feeding circuit 230.

[0137] 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 feeding 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.

[0138] 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 in the slot CM-DM mode. The first resonance can correspond to the above-mentioned slot CM mode, and the second resonance can correspond to the above-mentioned slot DM mode. The antenna 200 can make the resonances generated in the slot CM mode and the slot DM mode close to each other to jointly form a resonance frequency band to expand the operating bandwidth of the antenna 200.

[0139] Figure 5 and Figure 6 is Figure 4 a schematic diagram of the current distribution of the antenna 200 shown in Figure 5 is Figure 4Schematic diagram of the current distribution of the antenna 200 shown at the first resonance. Figure 6 is Figure 4 Schematic diagram of the current distribution of the antenna 200 shown at the second resonance.

[0140] As Figure 5 shown, at the resonance point of the first resonance, the currents on the first radiator and the second radiator are in opposite directions. 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, reverse currents are respectively distributed. The current distributions on the first radiator and the second radiator conform to the current characteristics of the slot CM mode.

[0141] As Figure 6 shown, at the resonance point of the second resonance, the currents on the first radiator and 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, the same-direction currents are respectively distributed (or rather, there is no current reversal point on the radiator). The current distributions on the first radiator and the second radiator conform to the current characteristics of the slot DM mode.

[0142] Figure 7 is Figure 4 Simulation results of the S parameters, radiation efficiency, and system efficiency of the antenna 200 shown.

[0143] As Figure 7 shown, the antenna can resonate near 1.72 GHz (first resonance) and near 2.86 GHz (second resonance).

[0144] Near the resonance point of the first resonance, the radiation efficiency and system efficiency are better. However, due to the current reversal (non-convergence) of the slot CM mode and the slot DM mode on the second radiator, part of the current will be cancelled. 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).

[0145] The embodiment of 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. A feeding member is arranged at intervals on one side of the radiator, and the antenna feeds an electrical signal into the radiator in an indirect coupling manner. The feeding member can generate an additional resonance, and this resonance can improve the radiation characteristics of the antenna, so that the electronic device has good communication performance.

[0146] Figure 8 It is a schematic diagram of another electronic device 10 provided by the embodiment of the present application.

[0147] As Figure 8As shown, the electronic device 10 includes a frame 11, an antenna 200, and a ground plane 300.

[0148] Among them, the frame 11 includes a first position 201 and a second position 202. The frame 11 is directly electrically connected to the ground plane 300 at the first position 201. The frame 11 has a first insulating gap at the second position 202.

[0149] It should be understood that in the embodiments of the present application, the direct electrical connection can be understood as that there are only connection components (such as elastic sheets, metal connecting ribs, etc.) between the two (for example, between the frame 11 and the ground plane 300), and no electronic components (such as capacitors, inductors, switches, etc.) are provided. For example, the grounding structure can be milled out on the electronic device through a process. The electrical connection through the connecting rib structure to the ground plane 300 can be understood as that at least part of the frame 11 and the ground plane 300 are of an integral structure.

[0150] The antenna 200 includes a first radiator 210, a feeding member 220, and a feeding circuit 230.

[0151] The first radiator 210 is the conductive part of the frame 11 between the first position 201 and the second position 202. The first radiator 210 is spaced from the ground plane 300.

[0152] The feeding member 220 is spaced from the first radiator 210. The first end of the feeding member 220 extends towards the first position 201. In one embodiment, the feeding member 220 can be located inside the frame 11. The inside can be understood as the side of the frame 11 facing the inside of the electronic device 10. In the thickness direction of the electronic device 10, the feeding member 220 may not overlap, partially overlap, or completely overlap with the ground plane 300.

[0153] The first radiator 210 and the feeding member 220 overlap at least partially in a first direction perpendicular to the extending direction of the first radiator 210 (for example, the x direction). In one embodiment, the projection of the feeding member 220 on the frame 11 is located between the first position 201 and the second position 202.

[0154] In one embodiment, the extending direction of the first radiator 210 is the same as the extending direction of the feeding member 220.

[0155] Among them, the extending direction of the first radiator 210 being the same as the extending direction of the feeding member 220 can be understood as that the angle formed by the extending direction of the first radiator 210 and the extending direction of the feeding member 220 is less than or equal to a first threshold, for example, less than or equal to 10°.

[0156] The feeding member 220 includes a feeding point 221. The feeding circuit 230 is coupled to the feeding point 221 to feed a radio frequency signal into the antenna 200.

[0157] The ratio of the length of the feeding element 220 between the feeding point 221 and the first end of the feeding element 220 to the length of the feeding element 220 between the feeding point 221 and the second end of the feeding element 220 is greater than or equal to 4. In one embodiment, the ratio of the length of the feeding element 220 between the feeding point 221 and the first end of the feeding element 220 to the length of the feeding element 220 between the feeding point 221 and the second end of the feeding element 220 is greater than or equal to 6. In one embodiment, the ratio of the length of the feeding element 220 between the feeding point 221 and the first end of the feeding element 220 to the length of the feeding element 220 between the feeding point 221 and the second end of the feeding element 220 is greater than or equal to 8.

[0158] It should be understood that the length of the feeding element 220 between the feeding point 221 and the first end of the feeding element 220 can be understood as the distance (the length of the feeding element 220) between the feeding point 221 and the end of the first end of the feeding element 220. Similar expressions in the embodiments of the present application can be understood accordingly. For the sake of brevity of discussion, they will not be elaborated one by one.

[0159] Meanwhile, in the embodiments of the present application, the distance between the "point" (for example, the feeding point 221) can be understood as the distance between the centers of the positions. For example, by connecting through the feeding element to the feeding point 221, the distance between the feeding point 221 can be understood as the distance between the center of the end of the feeding element connected to the feeding point 221.

[0160] The length of the frame 11 between the projection of the feeding point 221 on the frame 11 and the second position is less than or equal to one quarter of the length of the first radiator 210. In one embodiment, the length of the frame 11 between the projection of the feeding point 221 on the frame 11 and the second position is less than or equal to one eighth of the length of the first radiator 210. In one embodiment, the projection of the feeding point 221 on the frame 11 can be located on the first radiator 210. In one embodiment, the projection of the feeding point 221 on the frame 11 can also be located outside the first radiator 210 and does not overlap with the first radiator.

[0161] In one embodiment, the first radiator 210 and the feeding element 220 are used to generate a first resonance, and the resonance frequency band of the first resonance includes the first communication frequency band. The feeding element 220 is also used to generate a second resonance. In one embodiment, the second resonance is used to improve the radiation efficiency of the antenna 200 in the first communication frequency band.

[0162] It should be understood that the communication frequency band of the electronic device 10 can be understood as a frequency range including the frequency bands in which the electronic device 10 can communicate. For example, the low band (LB) (698 MHz - 960 MHz), the middle band (MB) (1710 MHz - 2170 MHz), or the high band (HB) (2300 MHz - 2690 MHz) in a cellular network. Taking one communication frequency band of the electronic device 10 as LB (698 MHz - 960 MHz) as an example, this frequency band can include multiple communication frequency bands within this frequency range. For example, B5, B8, etc., which can be correspondingly understood in the embodiments of the present application.

[0163] According to the embodiments of the present application, the first end (the end at the first position 201) of the first radiator 210 is a grounded end, and the second end (the end at the second position 202) is an open end. There is a strong current and a weak electric field near the first end of the first radiator 210. There is a strong electric field and a weak current near the second end of the first radiator 210.

[0164] The first end (the end far from the feeding point 221 and extending towards the first position 201) and the second end (the end close to the feeding point 221 and the second position 202) of the feeding element 220 are open ends. There are strong electric fields and weak currents near the first end and the second end of the feeding element 220. However, since the feeding point 221 is close to the second end of the feeding element 220, the area near the first end of the feeding element 220 is a high - impedance region, and the area near the second end is a low - impedance region. Therefore, the electric field near the first end of the feeding element 220 is stronger than the electric field near the second end, and there is a stronger electric field near the first end of the feeding element 220.

[0165] The first end of the first radiator 210 is close to the first end of the feeding element 220. The region with a weak electric field (strong magnetic field) of the first radiator 210 is close to the region with a strong electric field (strong magnetic field) of the feeding element 220, which can make the first resonance and the second resonance relatively balanced, and the second resonance will not produce a pit in the radiation efficiency. At the same time, since the feeding element 220 can generate the second resonance, part of the current on the first radiator 210 can be coupled to the feeding element 220, expanding the current path, which can equivalently increase the radiation aperture of the antenna 200, thereby improving the radiation characteristics of the antenna 200 and enabling the electronic device 10 to have better communication performance.

[0166] In one embodiment, the frequency difference between the resonance point frequencies of the first resonance and the second resonance is less than or equal to 500 MHz.

[0167] It should be understood that the resonance point of the second resonance can be located within the first communication frequency band or outside the first communication frequency band (for example, higher than the resonance point frequency of the first resonance or lower than the resonance point frequency of the first resonance). The embodiments of the present application do not limit this. When the frequency difference between the resonance point frequency of the first resonance and the resonance point frequency of the second resonance is within the above range, the antenna 200 can have better radiation characteristics.

[0168] In one embodiment, the distance D between the first radiator 210 and the feeding member 220 is less than or equal to 5 mm, so that there is good coupling characteristics between the first radiator 210 and the feeding member 220. In one embodiment, the distance D between the first radiator 210 and the feeding member 220 is less than or equal to 2 mm. In one embodiment, the distance D between the first radiator 210 and the feeding member 220 is greater than or equal to 0.5 mm.

[0169] It should be understood that the distance D between the first radiator 210 and the feeding member 220 can be understood as the average value of the minimum values of the distances between all points on the edge of the first radiator 210 facing the feeding member 220 and the points on the feeding member 220.

[0170] In one embodiment, an electronic component can be coupled between the first end of the feeding member 220 and the floor to adjust the impedance characteristics (such as the electric field distribution) of the first end of the feeding member 220.

[0171] It should be understood that when the electronic component is located at the first end of the feeding member 220, the first end of the feeding member 220 and the floor 300 cannot be equivalent to a short circuit. Therefore, the electronic component can be equivalent to a capacitor, and its equivalent capacitance value is less than or equal to 1 pF.

[0172] In one embodiment, the length L1 of the first radiator 210 and the length L2 of the feeding member 220 satisfy: L1×50% ≤ L2 ≤ L1×150%.

[0173] It should be understood that when the length L1 of the first radiator 210 and the length L2 of the feeding member 220 are within the above range, there is good coupling between the first radiator 210 and the feeding member 220, and the antenna 200 has better radiation characteristics.

[0174] In one embodiment, the feeding member 220 is strip-shaped. "Strip-shaped" can be understood as the length is much greater than the width. For example, the length is more than three times or six times the width. In one embodiment, the smallest dimension among the three-dimensional dimensions of the feeding member 220 is the thickness. For example, in one embodiment, when the feeding member 220 can be disposed on the surface of the bracket, the dimension in the direction perpendicular to the surface of the bracket is the thickness. The dimensions of the feeding member 220 other than the thickness can be understood as the length and the width.

[0175] In one embodiment, the antenna 200 may further include a tuning circuit 240. One end of the tuning circuit 240 may be coupled to the connection point of the first radiator 210. The tuning circuit 240 may include variable devices (such as variable capacitors, variable inductors, etc.) or switches, which can be used to switch the equivalent capacitance value or equivalent inductance value of the electronic components coupled to the connection point. In one embodiment, the connection point may be located at the second end of the first radiator 210. The second end of the first radiator 210 is an open end, which has a strong electric field and has a wider tuning range in this area for tuning.

[0176] In one embodiment, the electronic device includes a middle frame 19, and the middle frame includes the above-mentioned frame 11 and a middle plate 301, as Figure 9 shown. In one embodiment, the middle plate 301 is electrically connected to the floor 300 at multiple locations. In one embodiment, the middle plate 301 can be regarded as a part of the floor 300.

[0177] In one embodiment, the frame 11 is electrically connected to the middle plate 301 through a connecting rib structure (not shown in the figure), and the frame 11 can be coupled to the floor 300 through the connecting rib structure (such as a grounding connector).

[0178] Among them, the connecting rib structure is connected between the frame 11 and the middle plate 301 and is integrally formed with the frame 11 and the middle plate 301. For the sake of brevity of discussion, the grounding connectors described in the embodiments of the present application can be understood accordingly.

[0179] In one embodiment, the electronic device may further include a battery 302. The middle frame 19 further includes a battery compartment 303, and the battery compartment 303 is located on the middle plate 301. The battery 302 is located on the middle plate 301 and within the space enclosed by the battery compartment 303.

[0180] In one embodiment, the feeding member 220 may be located on the bracket. The feeding member 220 is located between the battery 302 and the frame 11.

[0181] In one embodiment, a part of the battery compartment 303 can be used as the feeding member. There are two insulating gaps on the side of the battery compartment 303 facing the first radiator 210, and the conductor part between the two insulating gaps can be used as the feeding member 220, as Figure 9 shown.

[0182] Figure 10 is a schematic diagram of another electronic device 10 provided by the embodiments of the present application.

[0183] As Figure 10As shown, the frame 11 includes a first position 201, a second position 202, and a third position 203 arranged in sequence. The second position 202 is located between the first position 201 and the third position 203. The frame 11 has a first insulating gap and a second insulating gap formed at the second position 202 and the third position 203 respectively. The frame 11 is directly electrically connected to the floor 300 at the first position 201.

[0184] The antenna 200 includes a first radiator 210, a second radiator 240, a feeding member 220, a first electronic component 231, and a second electronic component 232.

[0185] 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 240 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: 0.5×L2 < L1 < 1.5×L2. 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%.

[0186] The second end (one end at the second position 202) of the first radiator 210 includes a first connection point 211. The first end of the second radiator 240 includes a second connection point 212 and a third connection point 213. The second end of the first radiator 210 and the first end of the second radiator 240 are opposite to each other through the first insulating gap and do not contact each other.

[0187] It should be understood that the second end of the first radiator 210 and the first end of the second radiator 240 being opposite to each other and not contacting each other means that the end face of the second end of the first radiator and the end face of the first end of the second radiator 240 are opposite to each other and do not contact each other. In the embodiments of the present application, the first end / second end of the radiator refers to the radiator portion with a length within 5 mm (including 5 mm) from the end face of this end. It should be understood that the points included in the first end / second end of the radiator (such as connection points or feeding points) can be understood as the length of the radiator (frame) between this point (such as connection point or feeding point) and the end / end face of the radiator being less than or equal to 5 mm. In one embodiment, when coupled and connected to this point (such as connection point or feeding point) through a metal component such as a metal shrapnel, it can be understood as the length of the radiator (frame) between the metal component and the end / end face of the radiator connected to this point (such as connection point or feeding point).

[0188] 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 second connection point 212. The first end of the second electronic component 232 is coupled to the third connection point 213, and the second end of the second electronic component 232 is coupled to the ground plane 300.

[0189] The feeding element 220 is disposed at an interval from the first radiator 210 and the second radiator 240. In one embodiment, the extending direction of the feeding element 220 is the same as the extending directions of the first radiator 210 and the second radiator 240.

[0190] Wherein, the feeding element 220, the first radiator 210 and the second radiator 240 are used to generate a first resonance and a third resonance, and the first resonance and the third resonance are used to jointly support the first communication frequency band of the electronic device 10. The feeding element 220 is also used to generate a second resonance. In one embodiment, the second resonance is used to improve the radiation efficiency of the antenna 200 in the first communication frequency band.

[0191] It should be understood that Figure 10 the shown antenna 200 and Figure 8 the shown antenna 200 differ only in the second radiator 240, the first electronic component 231 and the second electronic component 232.

[0192] Due to the setting of the second radiator 240, the first electronic component 231 and the second electronic component 232, when the feeding circuit 230 feeds an electrical signal, the antenna 200 can additionally generate the above-mentioned third resonance, and the working bandwidth of the antenna 200 is expanded by the first resonance and the third resonance to jointly support the first communication frequency band of the electronic device 10.

[0193] The second end of the first radiator 210 is coupled to the ground plane 300 as a grounding end, and the second end of the second radiator 240 is an open end. And when the feeding circuit 230 feeds an electrical signal, the antenna 200 can generate the above-mentioned first resonance and third resonance to expand the working bandwidth of the antenna 200.

[0194] For the sake of simplicity of discussion, Figure 10 the shown antenna 200 and Figure 8 the similar parts of the shown antenna 200 will not be described in detail one by one. For example, the similar parts include the relative position relationship between the position of the first radiator 210 and the feeding element 220; the position of the feeding point 221; the boundary condition (open end or grounding end) of the feeding element 220; the shape of the feeding element 220, for example, being strip-shaped; the frequency difference between the resonance point frequencies of the first resonance and the second resonance; and so on.

[0195] In one embodiment, when the second resonance is not located between the first resonance and the third resonance, the first resonance and the third resonance can approach each other so that the first resonance and the third resonance are used to jointly support the first communication band of the electronic device 10. In one embodiment, the frequency difference between the first resonance and the third resonance is in the range of 5% to 20% (greater than or equal to 5% and less than or equal to 20%) of the low-frequency resonance frequency point or the high-frequency resonance frequency point. In one embodiment, in the low-frequency band (e.g., 698 MHz - 960 MHz), the frequency difference between the resonance point frequency of the first resonance and the resonance point frequency of the third resonance is greater than or equal to 50 MHz and less than or equal to 160 MHz. In the middle-frequency band (e.g., 1710 MHz - 2170 MHz), the frequency difference between the resonance point frequency of the first resonance and the resonance point frequency of the third resonance is greater than or equal to 120 MHz and less than or equal to 300 MHz. In the high-frequency band (e.g., 2300 MHz - 2690 MHz), the frequency difference between the resonance point frequency of the first resonance and the resonance point frequency of the third resonance is greater than or equal to 160 MHz and less than or equal to 500 MHz.

[0196] 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 240 (the currents on the radiators on both sides of the first insulating gap) are in the same direction, and the co-directional currents are distributed respectively (or rather, there is no current reversal point). In one embodiment, at the resonance point of the third resonance, the current on the first radiator 210 and the current on the second radiator 240 (the currents on the radiators on both sides of the first insulating gap) are in the same direction, and the co-directional currents are distributed respectively (or rather, there is no current reversal point).

[0197] It should be understood that the above-mentioned current in the same direction can be understood as the current flowing from one end to the other end. For example, the currents on the first radiator 210 and the second radiator 240 flow from the first position 201 (the first end of the first radiator 210) to the third position 203 (the second end of the second radiator 240), or from the third position 203 (the second end of the second radiator 240) to the first position 201 (the first end of the first radiator 210). Alternatively, the above-mentioned current in the same direction can be understood as that the currents are distributed in the same direction along the current flow path and there is no current reversal point. For the sake of simplicity of discussion, the current in the same direction mentioned in the embodiments of the present application can be understood accordingly.

[0198] It should be understood that due to the small clearance of the antenna 200 (for example, the distance between the first radiator 210, the second radiator 240 and the floor is less than or equal to 2 mm), the first radiator 210 and the second radiator 240 can form a radiator structure similar to a slot antenna. Both the first resonance and the third resonance can be regarded as being generated by the slot CM mode. Since the slot CM mode has a high radiation efficiency and system efficiency, the antenna has good radiation efficiency and system efficiency within the working frequency band formed by the first resonance and the third resonance.

[0199] In one embodiment, the second position 202 and the third position 203 are located on the first side of the frame 11. The length between the second position 202 and the central position of the first side is the same as the length between the third position 203 and the central position of the first side, and the lengths of the first side on both sides of the central position are the same.

[0200] It should be understood that the second position 202 (the first insulating gap) and the third position 203 (the second insulating gap) are symmetric (for example, symmetric along the central position of the first side), which can increase the symmetry of the antenna 200, thereby improving the radiation characteristics (such as the working bandwidth) of the antenna 200.

[0201] At the same time, the symmetry of the second position 202 (the first insulating gap) and the third position 203 (the second insulating gap) can increase the aesthetic degree of the electronic device 10.

[0202] In one embodiment, there may be some redundancy in the application of the symmetry of the second position 202 (the first insulating gap) and the third position 203 (the second insulating gap) in engineering. For example, when the difference between the length between the second position 202 and the central position of the first side and the length between the third position 203 and the central position of the first side is within a range of 10%, it can be considered to be within the range of the same length. Or, the above redundancy is determined according to different device types. When the electronic device 10 is a mobile phone, the difference between the length between the second position 202 and the central position of the first side and the length between the third position 203 and the central position of the first side is within a range of 2 mm, it can be considered to be within the range of the same length. When the electronic device 10 is a tablet / laptop, the difference between the length between the second position 202 and the central position of the first side and the length between the third position 203 and the central position of the first side is within a range of 5 mm, it can be considered to be within the range of the same length.

[0203] In one embodiment, at the resonance points of the first resonance and the third resonance, the intensity of the current on the first radiator 210 is different from the intensity of the current on the second radiator 240. 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 240. In one embodiment, at the resonance point of the third resonance, the intensity of the current on the first radiator 210 is less than the intensity of the current on the second radiator 240.

[0204] 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. A large intensity of the current can be understood as the current being more concentrated. 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 more concentrated current arrows near the area where the intensity of the current is large.

[0205] In one embodiment, at the resonance points of the first resonance and the third resonance, the intensity of the electric field generated near the first radiator 210 is different from the intensity of the electric field generated near the second radiator 240. 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 240. In one embodiment, at the resonance point of the third 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 240.

[0206] 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. A large intensity of the electric field can be understood as the electric field being more concentrated. 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 more concentrated electric field arrows near the area where the intensity of the electric field is large (for example, between the radiator and the floor).

[0207] It should be understood that the first resonance has the first radiator 210 as the main radiator (the current or the generated electric field on the first radiator 210 is stronger), and the third resonance has the second radiator 240 as the main radiator (the current or the generated electric field on the second radiator 240 is stronger).

[0208] At the same time, since the first resonance has the first radiator 210 as the main radiator and the third resonance has the second radiator 240 as the main radiator, therefore, when the user holds the device with the left hand or the right hand, the radiator that is farther away from the human body when holding can be used as the main radiator. In this case, when the user holds the electronic device, it will not have a great impact on the radiation characteristics of the antenna.

[0209] 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 2 pF.

[0210] In one embodiment, based on the center frequency of the first communication band being less than or equal to 1 GHz, the equivalent capacitance value of the first electronic component 231 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 communication band being greater than 1 GHz and less than or equal to 3 GHz, the equivalent capacitance value of the first electronic component 231 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 communication band being greater than 3 GHz, the equivalent capacitance value of the first electronic component 231 is less than or equal to 0.5 pF.

[0211] In one embodiment, the first electronic component 231 is an inductive component, and the equivalent inductance value of the first electronic component 231 is less than or equal to 10 nH.

[0212] In one embodiment, the second electronic component 232 is a capacitive component, and the equivalent capacitance value of the second electronic component 232 is less than or equal to 5 pF. In one embodiment, based on the center frequency of the first communication band being less than or equal to 1 GHz, the equivalent capacitance value of the second electronic component 232 is greater than 3 pF and less than or equal to 5 pF. In one embodiment, based on the center frequency of the first communication 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 3 pF. In one embodiment, based on the center frequency of the first communication 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.

[0213] In one embodiment, the second electronic component 232 is an inductive component, and the equivalent inductance value of the second electronic component 232 is less than or equal to 3 nH.

[0214] It should be understood that the first electronic component 231 can be used to determine the radiation characteristics (e.g., the resonant point frequency of the resonance) when the antenna 200 generates the first resonance. The second electronic component 232 can be used to adjust the grounding state of the first end of the second radiator 240, so as to determine the radiation characteristics (e.g., the resonant point frequency of the resonance) when the antenna 200 generates the third resonance.

[0215] The second end of the first radiator 210 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) will be generated near the second end of the first radiator 210. The first end of the second radiator 240 and the second end of the first radiator 210 can generate a first resonance through the way of electric field coupling. The first end of the second radiator 240 is coupled to the ground plane 300 through the second electronic component 232, and a strong magnetic field (the electric field is much smaller than the magnetic field) will be generated near the first end of the second radiator 240, so as to generate a third resonance through magnetic field coupling with the magnetic field at the second end of the first radiator 210.

[0216] In one embodiment, when the second electronic component 232 is a capacitive component, the resonance point frequency of the first resonance is lower than that of the third resonance. In one embodiment, when the second electronic component 232 is an inductive component, the resonance point frequency of the first resonance is higher than that of the third resonance. In one embodiment, the second electronic component 232 is a tunable capacitor or a tunable inductor.

[0217] In one embodiment, the first electronic component 231 can be a tunable component to switch the resonance point frequency. In one embodiment, the first electronic component 231 can include a switch and a plurality of capacitors or inductors, and the switch and the plurality of capacitors or inductors are connected in series and coupled between the first connection point and the second connection point. For example, the switch can be coupled between the connection point and the plurality of capacitors or inductors. In one embodiment, the first electronic component 231 can be a tuner.

[0218] It should be understood that the tunable components (for example, the second electronic component) described in the embodiments of the present application can all adopt the same structure. For the sake of simplicity of discussion, they will not be elaborated one by one.

[0219] 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%.

[0220] In one embodiment, the third connection point 213 and the second connection point 212 coincide. Herein, the coincidence can be understood as that the first electronic component 231 and the second electronic component 232 are coupled to the second radiator 240 through the same connection component, and the coincidence described in the embodiments of the present application can be understood accordingly.

[0221] In one embodiment, the antenna may further include a third electronic component 233, as Figure 11 shown. The second end of the second radiator 240 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 ground plane 300.

[0222] It should be understood that the third electronic component 233 can be used to simultaneously determine the radiation characteristics (e.g., the resonant point frequencies of the resonances) when the antenna 200 generates the first resonance and the third resonance. In one embodiment, the fourth connection point 214 can be coupled to the ground plane 300, and no electronic component is provided between the fourth connection point 214 and the ground plane 300.

[0223] Meanwhile, the third electronic component 233 can also be used to adjust the balance between the first radiator 210 and the second radiator 240 when the antenna 200 generates a resonance.

[0224] Among them, the balance between the first radiator 210 and the second radiator 240 can be understood as follows: when the antenna 200 generates a resonance, 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 240 is reduced, so that when the user holds the electronic device 10 with the left hand or the right hand, the influence on the radiation characteristics of the antenna 200 is roughly the same, and the radiation characteristics of the antenna 200 will not vary greatly due to different holding postures of the user.

[0225] In one embodiment, the third electronic component 233 is a tunable capacitor.

[0226] It should be understood that the third electronic component 233 can be an adjustable component to switch the radiation characteristics (e.g., the resonant point frequencies of the resonances) when the antenna 200 generates the first resonance and the third resonance.

[0227] In one embodiment, the second position 202 and the third position 203 are located at the bottom of the electronic device 10 (the second position 202 and the third position 203 are located on the first side of the frame, and the first side is the bottom side), as Figure 12 shown. A part of the charging interface 260 of the electronic device 10 is located between the second position 202 and the third position 203. The charging interface 260 can be used to electrically connect to an external connection component to implement functions such as charging and data transmission of the electronic device 10.

[0228] It should be understood that when the charging interface 260 is charging, a relatively strong current will be generated near the charging interface 260. Since a part of the charging interface is located on the second radiator 240, and the feeding member 220 of the antenna is close to the first radiator 210, the charging of the charging interface 260 has a relatively small influence on the radiation characteristics of the antenna.

[0229] Meanwhile, the first position 201 can be on the same side of the frame 11 as the second position 202 and the third position 203 (the second radiator 240 is linear), or the first position 201 can be on different sides of the frame 11 from the second position 202 and the third position 203 (the first radiator 210 is zigzag). The embodiments of the present application do not limit this, and can be selected according to actual production or settings.

[0230] Figures 13 to 15 is Figure 10 the simulation result of the antenna 200 in the electronic device 10 shown in the figure. Among them, Figure 13 is Figure 10 the Smith chart of the antenna 200 in the electronic device 10 shown in the figure. Figure 14 is Figure 10 the S-parameter simulation result of the antenna 200 in the electronic device 10 shown in the figure. Figure 15 is Figure 10 the radiation efficiency simulation result of the antenna 200 in the electronic device 10 shown in the figure.

[0231] As Figure 13 shown, between 1.6 GHz and 3 GHz, the curve has 3 intersections with the real axis (when the imaginary part is zero, the antenna resonates), correspondingly, Figure 10 the antenna 200 shown in the figure can generate 3 resonances between 1.6 GHz and 3 GHz.

[0232] As Figure 14 shown, the antenna resonates near 1.77 GHz, near 2.43 GHz, and near 2.68 GHz. Resonating near 1.77 GHz can correspond to the first resonance in the above embodiment, resonating near 2.43 GHz can correspond to the second resonance in the above embodiment, and resonating near 2.68 GHz can correspond to the third resonance in the above embodiment. The second resonance can be located between the first resonance and the third resonance to increase the bandwidth of the resonance frequency band formed by the first resonance and the third resonance.

[0233] As Figure 15 shown, both the first resonance and the third resonance are generated by the slot CM mode. In the resonance frequency band, the antenna has good radiation efficiency. And the second resonance is located between the first resonance and the third resonance, without introducing an efficiency pit, and can further expand the efficiency bandwidth of the antenna.

[0234] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present application, and all should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An electronic device, characterized in that, Comprising: Floor; A frame, the frame including a first position and a second position, the frame being directly electrically connected to the floor at the first position; The frame has a first insulating gap at the second position; An antenna, the antenna comprising: A first radiator, the first radiator being a conductive part of the frame between the first position and the second position, the first radiator being spaced apart from the floor; A feeding element, the feeding element being spaced apart from the first radiator, a first end of the feeding element extending towards the first position, the extending direction of the feeding element being the same as the extending direction of the first radiator, the first end and the second end of the feeding element being open ends; A feeding circuit, the feeding element including a feeding point, the feeding circuit being coupled to the feeding point; Wherein, the ratio of the length of the feeding element between the feeding point and the first end of the feeding element to the length of the feeding element between the feeding point and the second end of the feeding element is greater than or equal to 4; The length of the frame between the projection of the feeding point on the frame and the second position is less than or equal to one quarter of the length of the first radiator.

2. The electronic device according to claim 1, wherein The first radiator and the feeding element are used to generate a first resonance, and the resonance frequency band of the first resonance includes a first communication frequency band; The feeding element is further used to generate a second resonance, and the second resonance is used to improve the radiation efficiency of the first communication frequency band.

3. The electronic device according to claim 2, wherein The frequency difference between the resonance point frequency of the first resonance and the resonance point frequency of the second resonance is less than or equal to 500 MHz.

4. The electronic device according to any one of claims 1 to 3, wherein The frame further includes a third position, the first position, the second position and the third position are sequentially arranged on the frame, and the frame has a second insulating gap at the third position; The antenna further includes: A second radiator, the second radiator including a conductive part of the frame between the second position and the third position, the length L1 of the first radiator and the length L2 of the second radiator satisfy: 0.5×L2 < L1 < 1.5×L2; A first electronic component and a second electronic component, a first end of the first radiator includes a first connection point, a first end of the second radiator includes a first connection point and a second connection point, a first end of the first electronic component is coupled and connected to the first connection point, a second end of the first electronic component is coupled and connected to the second connection point, a first end of the second electronic component is coupled and connected to the third connection point, a second end of the second electronic component is coupled and connected to the floor, and the first ends of the first radiator and the second radiator are opposite and non-touching through the first insulating gap.

5. The electronic device according to claim 4, wherein The feeding element, the first radiator, and the second radiator are configured to generate the first resonance and the third resonance, and the first resonance and the third resonance are configured to jointly support the first communication band.

6. The electronic device according to claim 4, wherein a second end of the second radiator includes a fourth connection point, the fourth connection point is coupled to the ground, or a third electronic component is electrically connected between the fourth connection point and the ground.

7. The electronic device according to any one of claims 4 to 6, wherein the first electronic component is a capacitive component, based on the center frequency of the first communication band being less than or equal to 1 GHz, the equivalent capacitance value of the first electronic component is greater than 1.5 pF and less than or equal to 2 pF, based on the center frequency of the first communication 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 1.5 pF, or the first electronic component is an inductive component, and the equivalent inductance value of the second electronic component is less than or equal to 10 nH.

8. The electronic device according to any one of claims 4 to 7, wherein the second electronic component is a capacitive component, based on the center frequency of the first communication band being less than or equal to 1 GHz, the equivalent capacitance value of the second electronic component is greater than 3 pF and less than or equal to 5 pF, based on the center frequency of the first communication 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 3 pF, based on the center frequency of the first communication band being greater than 3 GHz, the equivalent capacitance value of the second electronic component is less than or equal to 0.5 pF, or the second electronic component is an inductive component, and the equivalent inductance value of the second electronic component is less than or equal to 3 nH.

9. The electronic device according to any one of claims 4 to 8, wherein the second position and the third position are located on a first side of the frame; a length of the frame between the first position and a center position of the first side is the same as a length of the frame between the second position and the center position of the first side.

10. The electronic device according to claim 9, wherein the electronic device further includes a charging interface; the first side is a bottom side of the electronic device, and a part of the charging interface is located between the second position and the third position.

11. The electronic device according to any one of claims 4 to 10, wherein the first communication band includes at least a partial band in 1710 MHz - 2170 MHz, and at least a partial band in 2300 MHz - 2690 MHz.

12. The electronic device according to any one of claims 4 to 11, wherein 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 second connection point.

13. The electronic device according to any one of claims 4 to 12, characterized in that 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 third connection point and the ground plane.

14. The electronic device according to any one of claims 4 to 13, characterized in that at the resonance point of the first resonance, the currents on the first radiator and the second radiator are in the same direction; at the resonance point of the second resonance, the currents on the first radiator and the second radiator are in the same direction.

15. The electronic device according to any one of claims 4 to 14, 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 less than the intensity of the current on the second radiator.

16. The electronic device according to claim 6, characterized in that the equivalent capacitance value of the third electronic component is less than or equal to 1 pF.

17. The electronic device according to any one of claims 4 to 16, characterized in that the length L1 of the first radiator and the length L2 of the second radiator satisfy: L1 × 80% ≤ L2 ≤ L1 × 120%.

18. The electronic device according to any one of claims 1 to 17, characterized in that the distance D between the first radiator and the feeding member is less than or equal to 5 mm.

19. The electronic device according to any one of claims 1 to 18, characterized in that the distance D between the first radiator and the feeding member is greater than or equal to 0.5 mm.

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