CN117096595A

CN117096595A - Electronic equipment

Info

Publication number: CN117096595A
Application number: CN202210523973.8A
Authority: CN
Inventors: 宇恩佐; 许志玮; 李建铭
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-05-13
Filing date: 2022-05-13
Publication date: 2023-11-21

Abstract

The application provides an electronic device. The electronic device includes a first antenna including a first electrical conductor, a first antenna feed point, a first device, and a second device; the first electrical conductor includes a first end and a second end; a first antenna feed point is disposed on the first electrical conductor and between the first end and the second end; the first device and the second device are respectively positioned at a first end and a second end, the first end is grounded through the first device, the second end is grounded through the second device, the first device comprises at least one capacitor or inductor, and the second device comprises at least one capacitor or inductor. The electronic device provided by the application can be wearable devices such as an intelligent watch and a bracelet, and the first antenna can be used for covering UWB frequency bands.

Description

Electronic equipment

Technical Field

The present application relates to the field of wireless communications, and in particular, to an electronic device.

Background

The ultra-wideband (UWB) technology can realize object positioning, and has the characteristic of high positioning accuracy, so that the ultra-wideband antenna is widely applied to electronic devices with positioning functions such as positioning objects or opening doors. Electronic equipment, for example wearing device, realizes the communication function through ultra wide band antenna, not only can accomplish the location data synchronization with the internet, can also acquire corresponding data from the internet to realize wearing device's locate function.

Fig. 1 shows a schematic block diagram of a dual-mode ultra-wideband antenna. As shown in fig. 1, the specific working principle includes: antenna 40 may have a first radiation pattern associated with length 165, length 165 referring to the length of slot 74 extending from edge 76 of conductive interconnect structure 106 to tuning feature 164. Length 165 may be long enough to cover communications at lower frequencies, such as frequencies in the GPS band, the cellular mid-band, and the cellular high-band. For antenna currents delivered by the antenna feed 62 at higher frequencies, the tuning component 164 may appear as a tuning inductance. At these higher frequencies, antenna 40 may have a second radiation pattern associated with length 163, length 163 referring to the length of slot 74 extending from antenna feed 62 to edge 76. Further, one or more harmonic modes associated with length 163 of slot 74 may allow antenna 40 to cover higher frequencies.

As shown in fig. 1, the antenna is changed from a frequency band supporting 2.4GHz to a frequency band supporting 5GHz by adjusting the radiation mode by the tuning component, but the far field electric field phase flatness of the ultra wideband antenna in fig. 1 is poor, and the positioning accuracy is directly affected.

When the required frequency band of the wearable device further increases, for example, 6.5GHz and 8GHz with higher frequencies, the existing ultra-wideband antenna cannot meet the precision requirement.

Based on the problem that the ultra-wideband antenna has a higher frequency, an ultra-wideband antenna structure capable of accurately positioning even for the higher frequency needs to be provided.

Disclosure of Invention

The application provides an electronic device. The ultra-wideband antenna mainly aims to solve the problem that when an ultra-wideband antenna in electronic equipment works at a higher frequency, the phase flatness of a far-field electric field is poor, and the positioning accuracy is directly affected.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical scheme:

in a first aspect, the present application provides an electronic device, such as a wristwatch, wristband, or other wearable device having a metal bezel.

The electronic device includes a first antenna including a first electrical conductor, a first antenna feed point, a first device, and a second device; the first electrical conductor includes a first end and a second end; a first antenna feed point is disposed on the first electrical conductor and between the first end and the second end; the first device and the second device are respectively positioned at a first end and a second end, the first end is grounded through the first device, the second end is grounded through the second device, the first device comprises at least one capacitor or inductor, and the second device comprises at least one capacitor or inductor.

Based on the above description of the structure of the electronic device provided by the application, it can be seen that the electronic device comprises a first antenna, wherein a first antenna feed point of the first antenna is arranged on a first conductor and is positioned between a first end and a second end to form a first antenna radiator, and two ends of the first antenna radiator are respectively grounded through a first device and/or a second device, so that two opposite sides of the first antenna are provided with two device return points; compared with the existing short circuit grounding return mode, the device grounding return can avoid the situation that the voltage value of the far field is zero, so that the first antenna has good far field electric field phase flatness when in operation; in addition, the first antenna provided by the application adopts a mode of grounding devices at two sides of the antenna, so that the first antenna is provided with at least two resonant paths, the first resonant path is from a first antenna feed-in point to a first device return point, the second resonant path is from the first device return point to a second device return point, and the two resonant paths can correspond to two different frequency bands, thereby multiplexing the feed points of the first antenna, improving the space utilization rate of electronic equipment and reducing potential nodes.

In a possible implementation manner of the first aspect, the electronic device further includes a second antenna, where the second antenna includes a second conductor and a second antenna feed point, the second conductor includes a third end and a fourth end, the third end is connected to the first end, and the fourth end is grounded; the second antenna feed point is disposed on the third end of the second electrical conductor. In this way, the resonant path of the second antenna is between the third end and the fourth end, and the performance of the first antenna is not affected, so that the first antenna and the second antenna have excellent performance. When the second antenna feed point is arranged on the first end, the second antenna and the first antenna share the first device, so that the arrangement space of the second antenna is saved, and the potential node is reduced.

The first antenna and the second antenna can cover different frequency bands, so that different services can be provided for the electronic equipment, the electronic equipment can support more application functions, and meanwhile, the first antenna and the second antenna provided by the application are compact in structure, good in performance and wide in adaptation range.

In a possible implementation manner of the first aspect, the electronic device further includes a connecting rib, where the connecting rib is fixedly connected to the third end of the second electrical conductor and the first end of the first electrical conductor.

In a possible implementation manner of the first aspect, the connecting rib may be replaced by a spring plate.

In a possible implementation manner of the first aspect, the electronic device further includes a third antenna, where the third antenna includes: the third conductor comprises a fifth end and a sixth end, the fifth end is connected with the fourth end, and the sixth end is connected with the second end; the third antenna feed point is disposed on the third electrical conductor and between the fifth and sixth ends. The frequency band covered by the third antenna can be a cellular (cellular) frequency band, the third antenna can share a second device with the first antenna and can also share a fourth device with the first antenna, so that potential nodes are reduced, reasonable layout of antennas on the electronic equipment is realized, and the requirements of various applications on the electronic equipment are further met.

The third antenna, the first antenna and the second antenna can cover different frequency bands, so that different services can be provided for the electronic equipment, and the electronic equipment can support more application functions; meanwhile, the first antenna, the second antenna and the third antenna provided by the application are compact in structure, good in performance and wide in adaptation range.

In a possible implementation manner of the first aspect, the third antenna may cover the cellular frequency band and the GPS L1 frequency band at the same time, so as to realize feed-in of the two.

In a possible implementation manner of the first aspect, the operating frequency band of the first antenna includes a first frequency band, and the operating frequency band of the second antenna includes a second frequency band, where the first frequency band is higher than the second frequency band.

In a possible implementation manner of the first aspect, a difference between the first frequency band and the second frequency band is greater than 4GHz.

In a possible implementation manner of the first aspect, the first frequency band is a UWB frequency band.

In a possible implementation manner of the first aspect, the first antenna provided by the application can cover the UWB frequency band and the GPS L5 frequency band at the same time, so as to realize the combined feed of the UWB frequency band and the GPS L5 frequency band.

In a possible implementation manner of the first aspect, the second frequency band is a Bluetooth (BT) frequency band. The frequency band covered by the second antenna can be a BT frequency band, the second antenna returns to the ground through the fourth terminal, and the return point is body ground and cannot be mutually influenced with the first antenna.

In a possible implementation manner of the first aspect, the electronic device further includes a metal frame and a circuit board, and along a circumference of the metal frame, the metal frame includes a continuous first portion, and the first portion is used as a first conductor of the first antenna; the circuit board is arranged on the inner side of the metal frame, and a gap is formed between the first part and the circuit board; the first device and the second device are arranged on the circuit board and are grounded through the circuit board.

The electronic equipment provided by the application utilizes the metal frame as the first conductor of the first antenna, and simultaneously utilizes the gap between the metal frame and the circuit board, and the first device and the second device arranged on the metal frame and the circuit board to form the slotted antenna, so that the existing components of the electronic equipment are effectively utilized to complete the arrangement of the first antenna; the first antenna feed point of the first antenna is arranged on the first conductor and is positioned between the first end and the second end to form a first antenna radiator, and two ends of the first antenna radiator are grounded through the first device and the second device respectively, so that two opposite sides of the first antenna are provided with two device return points; compared with the existing short circuit grounding return mode, the device grounding return mode has the advantages that the situation that the voltage value of the far field electric field is zero can be avoided, and therefore the high-efficiency grounding return device guarantees good phase flatness of the far field electric field when the first antenna works.

In a possible implementation manner of the first aspect, the first antenna covers a UWB band. When the first antenna provided by the application covers the UWB frequency band, the positioning is accurate, so that the electronic equipment can support the positioning application function.

In a possible implementation manner of the first aspect, the metal frame further includes a continuous second portion; the second portion acts as a second electrical conductor for the second antenna; wherein the second portion is a continuous integral with the first portion on the metal bezel.

In this way, the metal frame of the existing structural part of the electronic equipment is utilized, and different antennas are arranged at different positions of the metal frame, so that multiplexing of the metal frame is realized; one part of the metal frame is used as a first conductor of the first antenna, the other part of the metal frame is used as a second conductor of the second antenna, a first device is arranged between the first conductor and the second conductor, and the first device is a device return ground, so that the first antenna and the second antenna are not mutually affected, and have good communication performance; by arranging the first antenna and the second antenna, when the first antenna and the second antenna cover different frequency bands, different services can be provided for the electronic equipment, so that the electronic equipment can support more application functions.

In a possible implementation manner of the first aspect, the metal frame is in a continuous structure.

In a possible implementation manner of the first aspect, a distance between the first antenna feeding point and the first end is a first distance along a direction in which the first electrical conductor extends; the distance between the first antenna feed point and the second end is a second distance; wherein the first distance is greater than the second distance. Thus, the first antenna is fed in a bias mode, which is suitable for generating two or more frequency bands, such as two or more frequency bands including 6.5GHz frequency and 8GHz frequency.

In a possible implementation manner of the first aspect, at least one of the first device and the second device includes a first capacitor, and a capacitance value of the first capacitor is less than 1pF. The application realizes the device grounding return of the first antenna through the capacitor, so that the current of the first antenna passes through the capacitor device to realize the grounding return; further, by selecting an appropriate capacitance value, current can flow between the first antenna feed point and the return point, and the performance of the first antenna is ensured without affecting the performance of the antennas arranged in other areas of the electronic device. When the frequency band covered by the first antenna is 6.5GHz or 8GHz, the ground return point is equivalent to a short circuit state by selecting a capacitor with a capacitance value smaller than 1pF, so as to realize filtering.

In a possible implementation manner of the first aspect, at least one of the first device and the second device includes a first capacitor and a first inductor connected in series, the first capacitor is electrically connected to the circuit board, and the first inductor is electrically connected to the first portion.

In a possible implementation manner of the first aspect, the electronic device is a wearable device.

In a possible implementation manner of the first aspect, the wearable device includes a dial, and the first antenna feeding point is disposed at an eight-point moment position near the dial.

In a possible implementation manner of the first aspect, the first end is disposed between a nine-point time position and a ten-point time position of the dial; the second end is arranged between the seven-point time position and the eight-point time position of the dial plate.

In a possible implementation manner of the first aspect, the implementation manner of the electrical connection may be wire bonding.

In a possible implementation manner of the first aspect, the perimeter of the metal frame is in a range of 131-144 mm.

Drawings

Fig. 1 shows a schematic block diagram of a dual-mode ultra-wideband antenna;

fig. 2a shows an exploded schematic view of an electronic device according to an embodiment of the present application;

FIG. 2b illustrates a front view of an electronic device provided by an embodiment of the present application after assembly;

fig. 3a shows a simplified schematic structural diagram of a first antenna according to an embodiment of the present application;

fig. 3b shows a schematic structural diagram of a ground return device in a first antenna according to an embodiment of the present application;

fig. 4 shows a schematic structural diagram of a matching circuit in an electronic device according to an embodiment of the present application;

fig. 5a shows a current distribution diagram of a first antenna according to an embodiment of the present application;

fig. 5b shows a current distribution diagram of a first antenna according to an embodiment of the present application;

Fig. 6a shows a second schematic structural diagram of a matching circuit in an electronic device according to an embodiment of the present application;

fig. 6b shows a third schematic structural diagram of a matching circuit in an electronic device according to an embodiment of the present application;

fig. 7a is a schematic diagram illustrating a metal frame in the electronic device shown in fig. 2a according to an embodiment of the present application;

fig. 7b is a schematic structural diagram of an electronic device according to an embodiment of the present application, where the first antenna shown in fig. 3a is disposed;

fig. 7c is a schematic structural diagram illustrating a first antenna disposed in an electronic device according to an embodiment of the present application;

fig. 8 shows a schematic structural diagram including a first antenna and a second antenna according to an embodiment of the present application;

fig. 9a is a schematic diagram illustrating a metal frame in the electronic device shown in fig. 2a according to an embodiment of the present application;

fig. 9b is a schematic structural diagram of the electronic device provided by the embodiment of the present application, where the second antenna shown in fig. 8 is disposed;

fig. 9c is a schematic structural diagram of a second antenna disposed on an electronic device according to an embodiment of the present application;

fig. 10 shows a schematic structural diagram of an electronic device according to an embodiment of the present application;

fig. 11 shows a schematic structural diagram including a first antenna, a second antenna, and a third antenna according to an embodiment of the present application;

Fig. 12a is a schematic diagram illustrating a metal frame in the electronic device shown in fig. 2a according to an embodiment of the present application;

fig. 12b is a schematic diagram illustrating the arrangement of the electronic device according to the embodiment of the present application and the configuration shown in fig. 11;

fig. 13 shows a schematic structural diagram of a wearable device according to an embodiment of the present application;

fig. 14 shows S parameters when the first antenna provided by the embodiment of the present application covers the UWB band;

fig. 15 shows a simulation S parameter when the first antenna provided by the embodiment of the present application covers the UWB band;

FIG. 16 shows the efficiency of the simulation system when the first antenna provided by the embodiment of the present application covers the UWB band;

fig. 17 shows an electric field distribution diagram in a slot of a wearable device according to an embodiment of the present application.

Detailed Description

The technical scheme provided by the embodiment of the application is suitable for the electronic equipment adopting one or more of the following communication technologies: ultra-wideband (UWB) communication technology, bluetooth (BT) communication technology, global positioning system (global positioning system, GPS) communication technology, wireless fidelity (wireless fidelity, wiFi) communication technology, global system for mobile communications (global system for mobile communications, GSM) communication technology, wideband code division multiple access (wideband code division multiple access, WCDMA) communication technology, long term evolution (long term evolution, LTE) communication technology, 5G communication technology, and other communication technologies in the future, and the like.

The electronic device in the embodiment of the application can be a wearable device with a metal frame, such as a smart bracelet, a smart watch, a smart helmet, smart glasses and the like. The electronic device may also be a handheld device, a computing device or other processing device connected to a wireless modem, an in-vehicle device, an electronic device in a 5G network or an electronic device in a future evolved public land mobile network (public land mobile network, PLMN), etc., as the embodiment of the application is not limited thereto.

As the frequency bands required by electronic devices become more and more extensive, modes of 1/2 wavelength, 1-fold wavelength, 3/2 wavelength … …, etc. are generated in a continuous metal environment, so as to cover multiple frequency bands, for example, one or more of the following frequency bands: low Band (LB) in the 4G band (e.g., 698-960 MHz), intermediate band (MB) (e.g., 1710-2170 MHz), high Band (HB) (e.g., 2300-2690 MHz), BT band (e.g., 2.40-2.48 GHz), GPS L1 band (e.g., 1598-1605 MHz), and GPS L5 band (e.g., 1164-1215 MHz).

For the convenience of description of the technical solution of the present application, before describing the electronic device in detail in the embodiments of the present application, some concepts related to the present application will be described first.

Ultra-wideband (UWB) communication technology: with the development of wireless communication technology, UWB can complete wireless accurate positioning; the core principle of UWB positioning is ToA (Time of Arrival), i.e. the distance is obtained by the transmission time given the signal transmission speed. The ultra-wideband technology solves the serious problems of the traditional wireless technology about propagation for many years, and has the advantages of insensitivity to channel fading, low power spectrum density of a transmitted signal, low interception capability, low system complexity, capability of providing positioning accuracy of a plurality of centimeters and the like.

UWB antennas, which are antennas with ultra-wideband communication technology, transmit data by transmitting and receiving extremely narrow pulses with nanoseconds or less, directly modulate impulse pulses with steep rise and fall times, and thus have bandwidths on the order of GHz, for example, the operating frequency band of UWB antennas may be 6.25-6.75GHz, 7.75-8.25GHz, or 7-7.5GHz; the electronic equipment performs data synchronization between the position information of the equipment and the Internet by arranging a UWB antenna in the equipment and utilizing the communication function of the UWB antenna, so that positioning is realized; when a plurality of electronic devices provided with UWB antennas are communicated with each other, for example, a car key and a car door electronic induction device can obtain the distance between the car key and the car door, and when the distance meets a certain threshold value, the car key can directly open the car door. UWB antennas typically support the 2.4GHz band. However, different areas have different frequency band requirements, so when the electronic device completes the positioning application function, the UWB antenna needs to support communication in higher frequency bands including 6.5GHz and 8GHz, and ensure the positioning performance of the UWB antenna.

Connection/association: may refer to a mechanical or physical connection, i.e., a and B connection or a and B connection, may refer to a fastening member (e.g., screw, bolt, rivet, etc.) between a and B, or a and B contact each other and a and B are difficult to separate.

Coupling: it is to be understood that a direct coupling and/or an indirect coupling, and that "coupled connection" is to be understood as a direct coupling connection and/or an indirect coupling connection. Direct coupling may also be referred to as "electrical connection," meaning that the components are in physical contact and electrically conductive; the circuit structure can also be understood as a form of connecting different components through solid circuits such as copper foils or wires of a printed circuit board (printed circuit board, PCB) and the like which can transmit electric signals; an "indirect coupling" is understood to mean that the two conductors are electrically conductive by means of a space/no contact. In one embodiment, the indirect coupling may also be referred to as capacitive coupling, such as by coupling between a gap between two conductive elements to form an equivalent capacitance to effect signal transmission.

Switching on: the above electrical connection or indirect coupling means may be used to conduct or connect two or more components to perform signal/energy transmission, which may be called on.

Relative/relative settings: the opposite arrangement of a and B may refer to an opposite to (or face to face) arrangement of a and B.

Capacitance: which may be understood as lumped capacitance and/or distributed capacitance. Lumped capacitance refers to components that are capacitive, such as capacitive elements; the distributed capacitance (or distributed capacitance) refers to an equivalent capacitance formed by two conductive members with a certain gap therebetween.

Radiator: is a device for receiving/transmitting electromagnetic wave radiation in an antenna. In some cases, an "antenna" is understood in a narrow sense as a radiator that converts guided wave energy from a transmitter into radio waves, or converts radio waves into guided wave energy for radiating and receiving radio waves. The modulated high frequency current energy (or guided wave energy) produced by the transmitter is transmitted via the feeder to the transmitting radiator, where it is converted into electromagnetic wave energy of a certain polarization and radiated in a desired direction. The receiving radiator converts electromagnetic wave energy from a certain polarization in a particular direction in space into modulated high frequency current energy which is fed via a feeder to the receiver input.

The radiator may be a conductor having a specific shape and size. In one embodiment, the radiator may be implemented by a conductive bezel, which may also be referred to as a bezel antenna.

The radiator may also comprise a slot or slit formed in the conductor. For example, an antenna formed by slotting a conductor surface may be called a slot antenna or a slot antenna. In some embodiments, the slit shape is elongated. In some embodiments, the length of the slit is about half a wavelength. In some embodiments, the slot may be fed by a transmission line bridging one or both of its sides, or by a waveguide or resonator. The slots are excited with radio frequency electromagnetic fields and radiate electromagnetic waves into space. In one embodiment, the slot or slot antenna may include a wire-shaped radiator spaced from the floor and grounded at both ends of the radiator to form a slot or slot.

Ground/floor: it may be broadly intended that any ground layer, or ground plate, or at least a portion of a ground metal layer, etc., or at least a portion of any combination of any of the above, or ground plates, or ground components, etc., within an electronic device (such as a cell phone), a "ground/floor" may be used for grounding of components within the electronic device. In one embodiment, "ground/floor" may include any one or more of the following: the electronic device comprises a grounding layer of a circuit board of the electronic device, a grounding plate formed by a middle frame of the electronic device, a grounding metal layer formed by a metal film below a screen, a conductive grounding layer of a battery, and a conductive piece or a metal piece electrically connected with the grounding layer/the grounding plate/the metal layer. In one embodiment, the circuit board may be a printed circuit board (printed circuit board, PCB), such as an 8-, 10-, 13-or 12-to 14-ply board having 8, 10, 12, 13 or 14 layers of conductive material, or elements separated and electrically insulated by dielectric or insulating layers such as fiberglass, polymers, or the like. In one embodiment, the circuit board includes a dielectric substrate, a ground layer, and a trace layer, the trace layer and the ground layer being electrically connected by vias.

Any of the above ground layers, or ground plates, or ground metal layers are made of conductive materials. In one embodiment, the conductive material may be any of the following materials: copper, aluminum, stainless steel, brass, and alloys thereof, copper foil on an insulating substrate, aluminum foil on an insulating substrate, gold foil on an insulating substrate, silver plated copper foil on an insulating substrate, silver foil and tin plated copper on an insulating substrate, cloth impregnated with graphite powder, graphite coated substrate, copper plated substrate, brass plated substrate, and aluminized substrate. Those skilled in the art will appreciate that the ground layer/plate/metal layer may be made of other conductive materials.

Resonant frequency: the resonance frequency is also called resonance frequency. The resonant frequency may refer to a frequency at which the imaginary part of the input impedance of the antenna is zero. The resonance frequency may have a frequency range, i.e. a frequency range in which resonance occurs. The resonant frequency may be a frequency range with return loss characteristics less than-6 dB. The frequency corresponding to the strongest resonance point is the center frequency-point frequency. The return loss characteristic of the center frequency may be less than-20 dB.

Resonance frequency band/communication frequency band/operating frequency band: whatever the type of antenna, it always operates in a certain frequency range (frequency band width). For example, an antenna supporting the B40 band has an operating band including frequencies in the range of 2300MHz to 2400MHz, or stated otherwise, the operating band of the antenna includes the B40 band. The frequency range meeting the index requirements can be regarded as the operating frequency band of the antenna. The width of the operating band is referred to as the operating bandwidth. The operating bandwidth of an omni-directional antenna may reach 3-5% of the center frequency. The operating bandwidth of the directional antenna may reach 5-10% of the center frequency. The bandwidth may be considered as a range of frequencies on either side of a center frequency (e.g., the resonant frequency of a dipole), where the antenna characteristics are within an acceptable range of values for the center frequency.

The electronic device provided by the application is described below by taking a smart watch as an example with reference to the accompanying drawings.

Fig. 2a shows a schematic exploded view of an electronic device according to an embodiment of the present application. Fig. 2b shows an assembled front view of an electronic device according to an embodiment of the present application. Referring to fig. 2a and fig. 2b together, the electronic device includes a front cover 13, a display 15, a metal frame 1, a circuit board 2, a rear cover 21, and a battery 40; the front cover 13 is provided therein with a through hole 14 corresponding to the size of the display screen 15 so that the display screen 15 can be displayed to the outside of the electronic device through the through hole 14 when the display screen 15 is assembled to the through hole 14 from the front cover 13.

The back cover 21 is arranged on the side of the electronic device remote from the display screen 15. The back cover plate 21 may be made of a metal material; the rear cover can also be made of non-conductive materials, such as a glass rear cover, a plastic rear cover and other non-metal rear covers; it may also be a back cover made of both conductive and non-conductive materials.

The metal bezel 1 is disposed between the front cover plate 13 and the rear cover plate 21 and extends circumferentially around the periphery of the electronic device. It will be appreciated that in some embodiments, the electronic device includes a middle frame disposed between the front cover 13 and the rear cover 21, and the metal bezel 1 may be a part of the middle frame, and the middle frame may support the electronic devices in the complete machine.

The front cover 13 and the rear cover 21 are respectively covered along the upper and lower edges of the metal frame 1, thereby forming a housing or casing of the electronic device.

The metal frame 1 may have various shapes, for example, a circular ring shape, a square frame shape, or an irregular polygon shape. The shape of the metal frame can be selected, and the application is not limited. In one implementation, the metal bezel 1 made of a metal material is suitable for use in metal industry design (industrial design, ID).

As shown in fig. 2a, the metal frame 1 may further comprise inwardly extending protruding elements 103, the protruding elements 103 comprising an electrically conductive material, which may be used to receive a feed signal or to connect to a floor so that the corresponding frame part receives/transmits a frequency signal.

And, after the metal bezel 1, the display screen 15, the front cover plate 13 and the rear cover plate 21 are assembled, the inside of the electronic device is formed with a housing chamber 101, and the circuit board 2 is disposed in the housing chamber 101. The circuit board 2 may integrate electronic devices such as a main controller, a memory unit, and a power management module of the electronic device.

The battery 40 may also be disposed in the accommodation chamber 101; as shown in fig. 2b, in one embodiment, the circuit board 2 includes a U-shaped slot on the edge that is sized to accommodate the battery 40, with the battery 40 being embedded in the U-shaped slot. The battery 40 may power the electronics of the display 15, receiver, speaker, camera, etc. of the electronic device.

Referring again to fig. 2b, a gap 3 is provided between the metal bezel 1 and the circuit board 2. In one embodiment, the metal frame 1 can be at least partially used as an antenna radiator to receive/transmit a frequency signal, and a gap 3 is formed between the part of the frame used as the radiator and the circuit board 2, so that the antenna radiator has a good radiation environment; in some embodiments, the gap 3 is filled with a dielectric, such as polyurethane hot melt adhesive (polyurethane reactive, PUR).

In some embodiments, the metal bezel 1 may include a boss 102 extending into the gap 3. The boss 102 is used for being connected with the circuit board 2, specifically, a through hole opposite to the boss 102 is arranged on the circuit board 2, and a screw penetrates through the through hole and is screwed into the boss 102 to realize the fixed connection of the metal frame 1 and the circuit board 2; vice versa, the edge of the circuit board 2 is provided with an ear plate extending into the gap 3, the metal frame 1 is provided with through holes corresponding to the ear plate, and screws are threaded through the through holes in the metal frame 1 and into the ear plate of the circuit board 2.

In some embodiments, the edge of the circuit board 2 may also be provided with a notch corresponding to the shape and size of the boss 102, so that when the circuit board 2 is assembled, the notch corresponds to the boss 102 of the metal frame 1, thereby making the structure compact and further saving the internal space of the electronic device.

The application also comprises an antenna which can be applied to the electronic equipment. An antenna provided in an electronic device is described below with reference to the drawings.

The embodiment of the application provides a first antenna applied to the electronic equipment. Fig. 3a shows a simplified schematic structure of a first antenna according to an embodiment of the present application.

As shown in fig. 3a, in some embodiments, the first antenna 4 comprises: a first antenna feed point 41, a first electrical conductor 42, a first device 51 and a second device 52. The first electrical conductor 42 includes a first end 421 and a second end 422. The first antenna feed point 41 is disposed on the first electrical conductor 42 and is located between the first end 421 and the second end 422.

In one implementation, the first antenna feed point 41 may be a pad or dome location where a signal feed source of the first antenna is electrically connected to the first electrical conductor 42.

And, the first device 51 is located at the first end 421, one end of the first device 51 is electrically connected to the first conductor 42, and the other end is grounded, so that the first end 421 is grounded through the first device 51. The second device 52 is located at the second end 422, one end of the second device 52 is electrically connected to the first electrical conductor 42, and the other end is grounded, and the second end 422 is grounded through the second device 52.

Wherein the first device 51 may comprise at least one capacitance or inductance and the second device 52 may comprise at least one capacitance or inductance.

Compared with the existing mode of adopting short circuit ground return, the first antenna 4 adopts the first device 51 and the second device 52 to return to the ground, namely adopts the mode of adopting the device ground return to the ground, so that the condition that the electric field voltage value is zero can be avoided, and the first antenna is ensured to have better far field electric field phase flatness during working.

In some embodiments, as shown in FIG. 3a, the distance between the first antenna feed point 41 and the first end 421 along the direction in which the first electrical conductor 42 extends is a first distance L ₁ The method comprises the steps of carrying out a first treatment on the surface of the The distance between the first antenna feed point 41 and the second end 422 is a second distance L ₂ The method comprises the steps of carrying out a first treatment on the surface of the Wherein the first distance L ₁ Greater than the second distance L ₂ . Thus, the two ground return devices (i.e., the first device 51 and the second device 52) are at different distances from the first antenna feed point 41,i.e. the first antenna 4 is fed in a bias manner, the first antenna 4 may generate two different modes of operation, one of which may be used for the higher frequency band, and thus the feeding manner is suitable for higher frequency bands, e.g. 6.25-6.75GHz, and/or 7.75-8.25.

The following describes device structures that may be selected for the first device and the second device.

For example, the first device 51 may be a capacitor. In some embodiments, the capacitance value is greater than 0.3pF and less than 1pF, e.g., the capacitance value is 0.5pF. In this way, a capacitor having a small capacitance value is used as the first device 51, and the capacitor ground corresponds to a short circuit for the first antenna 4, and is suitable for a frequency band having a high frequency.

As another example, the first device 51 includes a capacitor and an inductor in series.

The same device structure as the first device 51 described above may be selected for the second device 52, i.e. it may be a capacitor, or it may comprise a capacitor and an inductor in series. Of course, a device structure different from the first device 51 may also be selected.

Fig. 3b shows a schematic structural diagram of a ground return device in a first antenna according to an embodiment of the present application. It should be understood that, for clarity, in the drawings of the embodiments of the present application, devices such as a feed source and a matching circuit are drawn outside a frame of an electronic device, and in an actual product, the devices should be disposed inside an electronic device, for example, on a circuit board and/or between the circuit board and the frame. As shown in fig. 3b, in one implementation, the first device 51 may be a first capacitor 501; the second device 52 may be a first capacitor 501 and a first inductor 502 in series. The capacitance value of the first capacitor 501 is greater than 0.3pF and less than 1pF, for example, may be 0.5pF.

In one implementation, the first device 51 includes a first capacitance 501 when the first antenna is used to cover the UWB band. The capacitance value of the first capacitor 501 ranges from 0.1 pF to 1pF, such as 0.5pF.

In one implementation, the second device 52 includes a first capacitance 501 when the first antenna is used to cover the UWB band. The capacitance value of the first capacitor 501 ranges from 0.1 pF to 1pF, such as 0.5pF. In one implementation, the first capacitance 501 of the first device 51 and the first capacitance 501 of the second device 52 may have the same or different capacitance values.

Wherein the distance between the first antenna feeding point 41 and the first device 51, the distance between the first antenna feeding point 41 and the second device 52 may be determined according to the UWB resonance frequency supported by the first antenna and the wavelength of the corresponding mode. For example, the wavelength of the first antenna 4 may be one half wavelength, and the supported UWB resonance frequencies may include 6.5GHz and 8GHz, and the distance between the first antenna feeding point 41 and the first device 51 may be in the range of 13-15mm, and the distance between the first antenna feeding point 41 and the second device 52 may be in the range of 5.5-7.5mm.

The first antenna provided in the embodiment of the present application is provided with two ground return devices, that is, a first device 51 and a second device 52, where the two ground return devices respectively correspond to two ground return points. The two return points and any two points of the first antenna feed point can form a resonant path, so that the first antenna has at least three resonant paths, which can be respectively called a first resonant path, a second resonant path and a third resonant path. Wherein the first resonant path is that current flows between a return point corresponding to the first device 51 and a return point corresponding to the second device 52; the second resonant path is such that current flows between the first antenna feed point 41 and the corresponding return point of the second device 52; the third resonant path is for current to flow between the first antenna feed point 41 and the corresponding return point of the first device 51.

When the electronic equipment comprising the first antenna is used, the first antenna can cover different frequency bands through different resonant paths. The electronic device may further include a matching circuit electrically connected to the first antenna signal feed source of the first antenna.

Fig. 4 shows a schematic structural diagram of a matching circuit in an electronic device according to an embodiment of the present application. As shown in fig. 4, in some alternative embodiments, the matching circuit 9 includes a second inductance 901, a second capacitance 902, a third capacitance 903, and a third inductance 904; the second inductor 901 is connected in series with the second capacitor 902 to form a series branch 91; one end of the series branch 91 is electrically connected to the first feed 43, and the other end is electrically connected to the first conductor 42; one end of the third capacitor 903 is electrically connected to the second inductor 901, and the other end of the third capacitor 903 is grounded; one end of the third inductor 904 is electrically connected to the second capacitor 902, and the other end of the third inductor 904 is grounded. Wherein the first feed 43 is used to feed the first antenna 4. The first feed 43 and the matching circuit 9 are both disposed on the circuit board 2.

Referring to fig. 3b and fig. 4, in the embodiment of the present application, the working frequency band of the antenna 4 may cover 8GHz, for example, may cover a frequency range of 7.75-8.25GHz, through the second inductor 901 and the second capacitor 902 in the matching circuit; the operating frequency band of the antenna 4 may cover a frequency of 6.5GHz, e.g. may cover a frequency range of 6.25-6.75GHz, by the first inductance 502 of the second device 52.

Fig. 5a shows a schematic diagram of a current distribution of a first antenna according to an embodiment of the present application. As shown in fig. 5a, the current of the first antenna 4 corresponding to the first resonant path flows in opposite directions on the first conductor 42, and the opposite currents pass through the first device 51 and the second device 52, respectively. The first resonant path may correspond to a first resonance generated by the first antenna 4.

In one implementation, the first antenna 4 may achieve coverage at a frequency of 6.5GHz in the mode of the first resonance.

Fig. 5b shows a second current distribution diagram of the first antenna in the electronic device according to the embodiment of the present application. As shown in fig. 5b, the current of the first antenna 4 corresponding to the second resonant path flows in opposite directions on the first conductor 42, and the opposite currents pass through the first feed 43 and the first device 51, respectively. The second resonant path may correspond to a second resonance generated by the first antenna 4.

In one implementation, the first antenna 4 may achieve coverage at 8GHz frequencies in the second resonant mode.

The matching circuit not only can realize the coverage of the first antenna at the frequency of 6.5GHz and the frequency of 8GHz, but also can realize the co-feeding of the first antenna at two frequencies with larger frequency difference, for example: a feed-back at 7GHz and 1.18 GHz.

For example, when the matching circuit is used to achieve co-feeding of the UWB band (e.g., including 7GHz frequency) and the GPS L5 band (e.g., including 1.18GHz frequency), the second inductor 901 is used for inductive loading of the first antenna 4. The inductive loading refers to that the frequency covered by the first antenna 4 is made different by designing the inductance value of the second inductor 901 (for example, the frequency is offset due to the difference of the inductance values in the design stage, specifically, when the inductance value becomes large, the frequency covered by the first antenna 4 is offset toward low frequency, and when the inductance value becomes small, the frequency covered by the first antenna 4 is offset toward high frequency), so that the first antenna 4 can cover the target frequency band. .

In one implementation, the second inductance 901 has an inductance value in the range of 4-6nH.

The third capacitor 903 is used for capacitive tuning of the first antenna 4. Capacitive tuning refers to improving the frequency matching of the first antenna 4 by designing the capacitance value of the third capacitor 903. Specifically, the circuit impedance of the matching circuit is inductive, and the third capacitor 903 is added to weaken the inductance of the circuit impedance, so that the total impedance of the circuit is close to neutral, that is, the imaginary part of the total impedance is close to 0, and the frequency matching of the first antenna 4 is realized. Wherein the larger the capacitance value, the larger the inductance of the cancelled circuit impedance.

In one implementation, the third capacitor 903 has a capacitance value in the range of 0.1-0.3pF.

The third inductor 904 is used to implement an antenna coverage GPS L5 band mode of operation. Specifically, the impedance of the third inductor 904 is low, so the feed current flows away from the third inductor 904, which may cover the frequency band of the GPS L5.

In one implementation, the third inductance 904 has an inductance value in the range of 11-15nH.

The second capacitor 902 is used for capacitive feed of the GPS L5 antenna; the capacitive feeding means that the second capacitor 902 is added at the feeding point to realize that the total impedance of the circuit is capacitive, and the capacitance value of the second capacitor 902 is designed to realize the position of the impedance point, so as to realize frequency matching.

In one implementation, the second capacitor 902 has a capacitance value in the range of 0.4-1pF.

The embodiment of the application also provides two other feasible implementation modes of the matching circuit.

Fig. 6a shows a second schematic structural diagram of a matching circuit according to an embodiment of the present application. As shown in fig. 6a, the matching circuit 9 includes a fourth inductor 905 and a fifth inductor 907 connected in series, and a fourth capacitor 906 connected between the fourth inductor 905 and the fifth inductor 907; wherein the fourth capacitance 906 is grounded; the fourth inductor 905 is electrically connected to the metal bezel of the electronic device and the fifth inductor 907 is electrically connected to the feed of the antenna.

Fig. 6b shows a third schematic structural diagram of a matching circuit according to an embodiment of the present application. As shown in fig. 6b, the matching circuit 9 includes a fifth capacitor 908 and a sixth capacitor 910 connected in series, and a sixth inductor 909 connected between the fifth capacitor 908 and the sixth capacitor 910; wherein the sixth inductor 909 is grounded; the fifth capacitor 908 is electrically connected to the metal bezel of the electronic device, and the sixth capacitor 910 is electrically connected to the feed of the antenna.

The first antenna shown in fig. 3 a-6 b described above may be applied in the electronic device shown in fig. 2a and 2 b.

Fig. 7a is a schematic diagram illustrating a metal frame in the electronic device shown in fig. 2a according to an embodiment of the present application. As shown in fig. 7a, along the circumferential direction of the metal bezel 1, the metal bezel 1 includes a continuous first portion 11, and the first portion 11 may serve as a radiator of the antenna. Where "continuous" means that the first portion 11 has no breaks along the circumferential direction of the first portion 11.

Fig. 7b is a schematic structural diagram of the electronic device provided in the embodiment of the present application, where the first antenna shown in fig. 3a is disposed. As shown in fig. 7b, specifically, the first portion 11 may serve as the first conductor 42 of the first antenna 4, and the first device 51 and the second device 52 may be electrically connected to the first portion 11 at one side and grounded at the other side. In this way, the first antenna 4 is fed into the metal frame 1 through the first feed source 43, and the device grounding is realized through the first device 51 and the second device 52, so that the slot antenna is formed by using the gap 3 between the metal frame 1 and the circuit board 2.

When the frequency band covered by the first antenna 4 comprises a frequency range of 6.25-6.75GHz, the current of the first antenna 4 corresponding to the first resonant path flows in opposite directions on the first portion 11, the opposite currents passing through the first device 51 and the second device 52, respectively. The first resonant path may correspond to a first resonance generated by the first antenna 4.

In one implementation, the first antenna 4 may achieve coverage at a frequency of 6.5GHz in the mode of the first resonance. .

Thus, with the first portion 11 of the metal bezel acting as an electrical conductor for the first antenna 4, the current of the first antenna 4 is returned to ground through the first device 51 and the second device 52, thereby achieving device return to ground for the first antenna 4.

In one implementation, when the capacitance value of the first capacitor 501 is 0.5pF, the current of the first antenna 4 may be caused to flow between the return points corresponding to the first device 51 and the second device 52 of the first antenna 4. In this way, the first antenna 4 does not affect the operation of other antennas provided on the electronic device when supporting the application functions of the electronic device at the frequency of 6.5 GHz.

In one implementation, the resonant frequency of the first resonance of the first antenna 4 may be one half wavelength.

When the frequency band covered by the first antenna 4 includes a frequency range of 7.75-8.25GHz, the current of the first antenna 4 in the second resonant path flows reversely on the first portion 11, and the reverse current passes through the first feed 43 and the first device 51, respectively, and the second resonant path may correspond to the second resonance generated by the first antenna 4.

In one implementation, the resonant frequency of the second resonance of the first antenna 4 may be one half wavelength.

The electronic equipment provided by the application utilizes the metal frame as the first conductor of the first antenna, and simultaneously utilizes the gap between the metal frame and the circuit board, and the first device and the second device arranged on the metal frame and the circuit board to form the slotted antenna, so that the existing components of the electronic equipment are effectively utilized to complete the arrangement of the first antenna; the first antenna feed point of the first antenna is arranged on the first conductor and is positioned between the first end and the second end, and the two ends of the first conductor are grounded through the first device and the second device respectively, so that two opposite sides of the first antenna are provided with two device return points; compared with the existing short circuit grounding return mode, the device grounding return mode has the advantages that the situation that the voltage value of the far field electric field is zero can be avoided, and therefore the high-efficiency grounding return device guarantees good phase flatness of the far field electric field when the first antenna works.

In addition, the first antenna provided by the application is provided with at least two resonant paths, wherein the first resonant path is that current flows between the first device return point and the second device return point, and the second resonant path is that current flows between the first antenna feed-in point and the first device return point, and the two resonant paths can correspond to two different frequency bands, so that multiplexing of the first conductor can be realized, and the space utilization rate of the electronic equipment is better.

In one implementation, as shown in fig. 7a and 7b, the metal rim 1 is circular with a circumference ranging from 131-144mm.

In one implementation, the material grade of the circuit board 2 is FR-4, and the material of the circuit board 2 may be a double-sided copper-clad board formed by laminating epoxy resin glass cloth, and the dielectric constant is 4.4. Among them, FR-4 is a code of a flame-retardant material grade, which means that the resin material must be able to self-extinguish after passing through a burning state.

In one implementation, the thickness of the circuit board 2 ranges from 0.8 to 1mm.

In one implementation, the width of the gap 3 ranges from 1-1.5mm.

The first antenna arranged in the electronic equipment can be used for covering UWB frequency bands. Fig. 7c is a schematic structural diagram illustrating a first antenna disposed in an electronic device according to an embodiment of the present application.

In one implementation, as shown in fig. 7c, the first device 51 comprises a first capacitance 501 when a first antenna provided in the electronic device is used to cover the UWB band. The capacitance value of the first capacitor 501 ranges from 0.1 pF to 1pF, such as 0.5pF.

In one implementation, the second device 52 may also include a first capacitance 501. The capacitance value of the first capacitor 501 ranges from 0.1 pF to 1pF, such as 0.5pF.

In one implementation, the first capacitance 501 of the first device 51 and the first capacitance 501 of the second device 52 may have the same or different capacitance values.

As shown in fig. 7c, upon completion of the electrical connection of the second device 52 to the first part 11, this may be achieved by means of screws 521 in the electronic device which fix the first part 11 and the circuit board 2. In particular, screw 521 may be disposed proximate to second device 52 and in electrical communication with second device 52; the screw 521 may be screwed onto the boss 102 of the metal bezel 1 through the circuit board 2 so that the current of the first antenna 4 passes through the screw 521 and the second device 52 back to ground.

In addition to the first antenna, the embodiment of the application also provides a second antenna applied to the electronic equipment. The second antenna is described below with reference to the accompanying drawings.

Fig. 8 shows a schematic structural diagram including a first antenna and a second antenna according to an embodiment of the present application. As shown in fig. 8, in some embodiments, the second antenna 6 includes: a second conductor 611 and a second antenna feed point 612, the second conductor 611 comprising a third terminal 613 and a fourth terminal 614, the third terminal 613 being connected to the first terminal 421, the fourth terminal 614 being grounded; the second antenna feed point 612 is disposed on the first end 421.

The second antenna 6 in the above embodiment, by connecting the third terminal 613 with the first terminal 421 and simultaneously grounding the fourth terminal 614, makes the resonant path of the second antenna between the third terminal and the fourth terminal, so that the second antenna does not affect the performance of the first antenna.

And when the second antenna feed point is disposed on the first end, the second antenna and the first antenna may share the first device 51, saving a disposition space of the second antenna, and reducing a potential node.

The first antenna and the second antenna can cover different frequency bands, and a more flexible frequency band coverage mode is provided.

The second antenna as described in fig. 8, like the first antenna, can also be applied to the electronic device shown in fig. 2a and 2 b.

Fig. 9a shows a schematic diagram of a metal frame in the electronic device shown in fig. 2a according to an embodiment of the present application. In one implementation, as shown in fig. 9a, the metal bezel 1 further comprises a continuous second portion 12 along the circumference of the metal bezel 1. The second part 12 may also act as a radiator of the antenna; wherein the second part 12 is fixedly connected with the first part 11.

It should be noted that: the "connection" in the fixed connection between the second portion 12 and the first portion 11 may be the same end, or may be formed by a structural member or other electrical conductor, so that the second portion 12 is continuous with the first portion 11. In a possible process configuration, the second portion 12 and the first portion 11 may be an integrally formed structure.

Fig. 9b is a schematic structural diagram of the electronic device provided with the second antenna shown in fig. 8 according to the embodiment of the present application. As shown in fig. 9b, the second portion 12 serves as a second conductor 611 of the second antenna 6, and the first end 421 and the third end 613 are connected such that the first conductor 42 and the second conductor 611 form a continuous one; the second antenna feed point 612 is disposed on the third terminal 613, and the fourth terminal 614 is grounded; the fourth terminal 614 may be grounded by way of a metal layer of the connection circuit board 2. It should be noted that, in fig. 9b, the first end 421 and the third end 613 are not connected, but the connection relationship between the two is shown by a dashed box for clearly showing the second antenna provided on the electronic device.

In this way, the embodiment of the application utilizes the conductivity of the metal frame in the electronic equipment to enable the metal frame which is originally only used as a structural member to be used as the conductors of the first antenna and the second antenna, thereby realizing multiplexing of the metal frame; one part of the metal frame is used as a first conductor of the first antenna, the other part of the metal frame is used as a second conductor of the second antenna, a first device is arranged between the first conductor and the second conductor, and the first device is a device return ground, so that the first antenna and the second antenna are not mutually affected, and have good communication performance; by arranging the first antenna and the second antenna, when the first antenna and the second antenna cover different frequency bands, different services can be provided for the electronic equipment, so that the electronic equipment can support more application functions.

In other embodiments, the second antenna 6 comprises: a second conductor 611 and a second antenna feed point 612, the second conductor 611 comprising a third terminal 613 and a fourth terminal 614, the third terminal 613 being connected to the first terminal 421, the fourth terminal 614 being grounded; the second antenna feed point 612 is disposed on the second electrical conductor 611 and between the third terminal 613 and the fourth terminal 614. When the second antenna feeding point 612 is disposed on the second conductor 611, the second antenna feeding point 612 may be close to the third terminal 613, for example, the second antenna feeding point 612 is spaced from the third terminal 613 by 3-5mm, so as to make the antenna arrangement compact.

The application also provides a connection mode of the second conductor and the first conductor. Fig. 9c is a schematic structural diagram of a second antenna disposed on an electronic device according to an embodiment of the present application.

As shown in conjunction with fig. 9b and 9c, in one implementation, the electronic device further includes: a connecting rib 7, wherein the connecting rib 7 is positioned at the connection part of the third end 613 of the second electric conductor 611 and the first end 421 of the first electric conductor 42, and the connection is formed through the connecting rib 7, so that the first electric conductor 42 and the second electric conductor 611 form a continuous structure; the first device 51 is electrically connected to the connection bars 7 by wire bonding.

It should be noted that, because the metal frame is not a flat ring as shown in the figure, but there is concave-convex structural component in the metal frame, the connecting rib can be connected with the metal frame through the concave-convex structural component, and can also be integrally formed with the metal frame.

In one implementation, the connecting ribs 7 may be replaced by metal spring plates.

Fig. 10 shows a schematic structural diagram of an electronic device according to an embodiment of the present application. As shown in fig. 10, in one embodiment, when the first antenna (fed by the first feed 43) covers the UWB band (hereinafter referred to as UWB antenna), the second antenna (fed by the second feed 63) may cover the BT band (hereinafter referred to as BT antenna), where the feeding point of the BT antenna is electrically connected to both the metal bezel and the first device 51, so that the current passing through the UWB antenna passes back to the ground through the first device 51.

The current of the BT antenna flows from the feed point to a position far away from the UWB antenna, so that the BT antenna does not influence the operation of the UWB antenna, and the UWB antenna and the BT antenna can radiate simultaneously.

In one implementation, the matching circuit 71 of the BT antenna includes a capacitor 711 and an inductor 712 in series, and an inductor 713 connected between the capacitor 711 and the inductor 712, the inductor 713 being grounded.

In some alternative embodiments, as shown in fig. 10, a first capacitor for grounding in the first device 51 may be used as a part of the BT antenna matching circuit 71 to implement multiplexing of the capacitors. For BT antennas, the first capacitance corresponds to a half-open state; for UWB antennas, the first capacitance corresponds to a short circuit condition.

In addition to the first antenna and the second antenna provided in the foregoing embodiments, the electronic device may further include a third antenna disposed at another location, and the third antenna is described below with reference to the accompanying drawings.

Fig. 11 shows a schematic structural diagram including a first antenna, a second antenna, and a third antenna according to an embodiment of the present application. As shown in fig. 11, the third antenna (fed by the third feed 83) includes: a third conductor 81 and a third antenna feed point 82, the third conductor 81 comprising a fifth end 811 and a sixth end 812, the third antenna feed point 82 being arranged on the third conductor 81 between the fifth end 811 and the sixth end 812.

In one implementation, the fifth end 811 is connected to the fourth end 614 and the sixth end 812 is connected to the second end 422; thus, the first conductor, the second conductor and the third conductor are connected end to form a closed loop structure. For clarity of illustration of the third antenna, the fifth end 811 and the fourth end 614 are not connected together, and the sixth end 812 and the second end 422 are not connected together in fig. 11, but only the elements thereof are shown by the dashed boxes to have a connection relationship, and in fact, the fifth end 811 and the fourth end 614 are in a fixed connection relationship, and the sixth end 812 and the second end 422 are also in a fixed connection relationship.

The third antenna, the first antenna and the second antenna provided by the embodiment can cover different frequency bands, so that different services can be provided for the electronic equipment, and the electronic equipment can support more application functions; meanwhile, the first antenna, the second antenna and the third antenna provided by the application are compact in structure, good in performance and wide in adaptation range.

The third antenna as described in fig. 11 may be applied to a metal bezel as shown in fig. 2a and 2 b. Fig. 12a shows a schematic diagram of a metal frame in the electronic device shown in fig. 2a according to an embodiment of the present application.

As shown in fig. 12a, in some embodiments, the metal bezel 1 further includes a third portion 13, the third portion 13 is a portion structure of the metal bezel 1 except for the first portion 11 and the second portion 12, and the third portion 13 may be used as a radiator of the third antenna, and in particular, the third portion 13 may be used as a third conductor of the third antenna.

In this way, the embodiment of the application utilizes the conductivity of the metal frame in the electronic equipment to enable the metal frame which is originally only used as a structural member to be used as conductors of the first antenna, the second antenna and the third antenna, thereby realizing multiplexing of the metal frame; the first part of the metal frame is used as a first conductor of the first antenna, the second part of the metal frame is used as a second conductor of the second antenna, the third part of the metal frame is used as a third conductor of the third antenna, and the first conductor, the second conductor and the third conductor are connected end to form a closed loop structure; a first device is arranged between the first conductor and the second conductor, and the current of the antenna returns to the ground through the first device, so that the first antenna and the second antenna are not affected by each other, and the antenna has good communication performance; a second device is arranged between the first conductor and the third conductor, and the current of the antenna returns to the ground through the second device, so that the first antenna and the third antenna are not affected by each other, and the antenna has good communication performance; and the current of the antenna between the second conductor and the third conductor is returned to the ground through short circuit, so that the second antenna and the third antenna are not mutually affected, and the communication performance is good. Therefore, the electronic equipment with the first antenna, the second antenna and the third antenna provided by the application has good communication performance and can support various application functions.

And by arranging the first antenna, the second antenna and the third antenna, when the first antenna, the second antenna and the third antenna cover different frequency bands, different services can be provided for the electronic equipment, so that the electronic equipment can support more application functions.

Fig. 12b is a schematic diagram illustrating the arrangement of the electronic device according to the embodiment of the present application and the structure shown in fig. 11. As shown in fig. 12b, in some alternative embodiments, the third antenna 8 may cover a cellular (cellular) band (hereinafter referred to as a cellular antenna), and the cellular antenna is disposed on a side of the second device 52 away from the UWB antenna along the circumference of the first portion 11 and is electrically connected to the metal bezel 1. The current of the cellular antenna flows in the portion of the second device 52 remote from the UWB antenna. In some alternative embodiments, the GPS L1 may be co-fed at the cellular antenna.

In some alternative embodiments, the first antenna is a UWB antenna, the second antenna covers the BT frequency band and the GPS L5 frequency band, as shown in fig. 12 b.

When the antenna structure including the first antenna, the second antenna, and the third antenna is applied to the wearable device provided in the above embodiment, for example, a smart watch, the setting positions are as follows. Fig. 13 shows a schematic structural diagram of a wearable device according to an embodiment of the present application.

As shown in fig. 13, in some alternative embodiments, the wearable device further includes a dial, the first antenna feed point 41 is disposed at an eight-point time position near the dial, and the first end 421 is disposed between a nine-point time position to a ten-point time position of the dial; the second end 422 is arranged between the seven-point time position and the eight-point time position of the dial; the second antenna feed point 612 is disposed at a position between nine points in time and ten points in time near the dial; the third antenna feed point 82 is disposed at a position near the five-point time of the dial. The time instants on the dial shown in fig. 13 are marked with roman numerals, but the marking of the actual time instants is not limited to roman numerals, but may be arabic numerals or other symbols.

In the embodiment of the electronic device, the metal frame is a continuous structure, for example, no slit or break is provided on the metal frame, or no slit or break is provided on the appearance surface of the metal frame.

Fig. 14 shows an S-parameter curve of a UWB antenna provided by an embodiment of the present application. As shown in fig. 14, the abscissa indicates the antenna coverage frequency, and the ordinate indicates the reflection coefficient of the antenna; when the UWB antenna is not provided with a matching circuit, namely in a direct feed state, the application frequency band is mainly located at 7-7.5GHz; when the UWB antenna is provided with a matching circuit, namely a double-working mode, the frequency bands Ch5 (6.25-6.75 GHz) and Ch9 (7.75-8.25 GHz) are respectively covered. The first antenna in the electronic equipment provided by the application can cover three higher frequency bands of 7-7.5GHz, 6.25-6.75 GHz and 7.75-8.25 GHz, so that the accurate positioning of the UWB antenna is realized.

Fig. 15 shows a simulated S-parameter curve of a UWB antenna provided by an embodiment of the present application. As shown in fig. 15, the abscissa is the antenna coverage frequency, and the ordinate is the reflection coefficient of the antenna; the application of UWB on the wearing device covers Ch5 (6.25-6.75 GHz) and Ch9 (7.75-8.25 GHz).

Fig. 16 shows a simulated system efficiency curve for a UWB antenna provided by an embodiment of the present application. As shown in fig. 16, the abscissa indicates the antenna coverage frequency, and the ordinate indicates the antenna system efficiency; ch5 (6.25-6.75 GHz) system efficiency averages about-6.5 dB, and Ch9 (7.75-8.25 GHz) system efficiency averages about-7.2 dB. According to the UWB antenna structure provided by the application, the system efficiency is more stable in performance on different frequency bands.

Fig. 17 shows an electric field distribution diagram in a slot of a wearable device according to an embodiment of the present application. As shown in fig. 17, the electric field distribution of 6.5GHz and 8GHz is concentrated between the two-circuit capacitors, and the energy distribution corresponding to the feed point of other antennas is smaller, i.e. the mutual influence degree of the UWB antenna and the other antennas is smaller, and the independence is high.

Claims

1. An electronic device, the electronic device comprising a first antenna, the first antenna comprising:

a first electrical conductor including a first end and a second end;

A first antenna feed point disposed on the first electrical conductor and located between the first end and the second end;

the first device and the second device, the first end is grounded through the first device, the second end is grounded through the second device, the first device comprises at least one capacitor or inductor, and the second device comprises at least one capacitor or inductor.

2. The electronic device of claim 1, further comprising a second antenna, the second antenna comprising:

the second conductor comprises a third end and a fourth end, the third end is connected with the first end, and the fourth end is grounded;

and a second antenna feed point disposed at the third end of the second conductor.

3. The electronic device of claim 2, wherein the electronic device further comprises:

and the connecting rib is fixedly connected with the third end of the second conductor and the first end of the first conductor.

4. The electronic device of claim 2 or 3, further comprising a third antenna, the third antenna comprising:

A third electrical conductor comprising a fifth end connected to the fourth end of the second electrical conductor and a sixth end connected to the second end of the first electrical conductor;

and a third antenna feed point disposed on the third electrical conductor and between the fifth end and the sixth end.

5. The electronic device of any of claims 2-4, wherein the operating frequency band of the first antenna comprises a first frequency band and the operating frequency band of the second antenna comprises a second frequency band, the first frequency band being higher than the second frequency band.

6. The electronic device of claim 5, wherein the first frequency band differs from the second frequency band by greater than 4GHz.

7. The electronic device of claim 5 or 6, wherein the first frequency band is a UWB frequency band.

8. The electronic device of any of claims 5-7, wherein the second frequency band is a bluetooth frequency band.

9. The electronic device of any one of claims 2-8, wherein the electronic device further comprises:

a metal bezel comprising a continuous first portion that acts as the first electrical conductor of the first antenna;

The circuit board is arranged on the inner side of the metal frame, and a gap is reserved between the first part and the circuit board;

the first device and the second device are arranged on the circuit board and are grounded through the circuit board.

10. The electronic device of claim 9, wherein the metal bezel further comprises a continuous second portion; the second portion acts as the second electrical conductor of the second antenna;

wherein the second portion is continuous integral with the first portion on the metal bezel.

11. The electronic device of claim 9 or 10, wherein the metal bezel is a continuous structure.

12. The electronic device of any of claims 1-11, wherein a distance between the first antenna feed point and the first end along a direction in which the first electrical conductor extends is a first distance; the distance between the first antenna feed point and the second end is a second distance;

wherein the first distance is greater than the second distance.

13. The electronic device of any of claims 1-12, wherein at least one of the first and second devices comprises a first capacitance having a capacitance value of less than 1pF.

14. The electronic device of any of claims 1-13, wherein the electronic device is a wearable device.

15. The electronic device of claim 14, wherein the wearable device comprises a dial, and the first antenna feed point is disposed at an eight-point time position proximate to the dial.

16. The electronic device of claim 15, wherein the first end is disposed between a nine-point time position to a ten-point time position of the dial; the second end is arranged between seven-point time positions and eight-point time positions of the dial.

17. The electronic device of claim 15 or 16, wherein the perimeter of the metal bezel is in the range of 131-144 mm.