Electronic device

Abstract

The invention provides electronic equipment. The electronic equipment comprises a floor; at least one antenna unit; each antenna unit comprises an inverted-F antenna unit, a monopole antenna unit, a slot antenna unit, a feed line and a feed point; wherein the inverted-F antenna unit and the monopole antenna unit are arranged at the edge of the floor and are perpendicular to the floor; the feed line and the floor are arranged in parallel, the first end of the feed line is connected with the feed point, the second end of the feed line is electrically connected with the feed end of the inverted-F antenna unit and the feed end of the monopole antenna unit, and the grounding end of the inverted-F antenna is connected with the floor; and the slot antenna unit is arranged on the floor and is positioned beside the feeder line.

Description

Technical Field

[0001] The present application relates to the field of antenna technology, and more specifically, to an electronic device. Background Art

[0002] With the rapid development of 5G communication technology, multiple input multiple output (MIMO) antenna systems have attracted extensive research and attention in recent years. MIMO antenna systems can improve the channel capacity of the system, but due to the limited internal space of electronic devices such as mobile phones, it is inevitable that there will be serious coupling problems between antenna units when so many antennas are arranged in such a small space. Therefore, how to reduce the mutual coupling between antenna units in the MIMO antenna system and design an antenna system with wide bandwidth and good isolation performance on mobile devices with limited space is an urgent problem to be solved. Summary of the invention

[0003] The present application provides an electronic device. The following introduces various aspects involved in the embodiments of the present application.

[0004] In a first aspect, an electronic device is provided, comprising: a floor; at least one antenna unit; each of the antenna units comprises: an inverted-F antenna unit, a monopole antenna unit, a slot antenna unit, a feeder and a feed point; wherein the inverted-F antenna unit and the monopole antenna unit are arranged at the edge of the floor and are perpendicular to the floor; the feeder is arranged parallel to the floor, a first end of the feeder is connected to the feed point, a second end is electrically connected to the feeding end of the inverted-F antenna unit and the feeding end of the monopole antenna unit, and a ground end of the inverted-F antenna is connected to the floor; the slot antenna unit is arranged on the floor and is located next to the feeder.

[0005] As a possible implementation, the inverted-F antenna unit includes a ground branch, a feeding branch and a radiating branch; the first end of the ground branch is connected to the floor, the second end of the ground branch is connected to the first end of the feeding branch and the first end of the radiating branch, and the second end of the feeding branch forms the feeding end of the inverted-F antenna; the antenna unit also includes a connecting section, the first end of the connecting section is connected to the second end of the feeding branch, and the second end of the connecting section is connected to the second end of the feed line.

[0006] As a possible implementation method, the extension direction of the grounding branch is perpendicular to the floor, and the extension direction of the feeding branch is parallel to the floor; the radiating branch includes a first segment and a second segment, the extension direction of the first segment is perpendicular to the extension direction of the second segment, the first end of the first segment is connected to the second end of the grounding branch, and the second end of the first segment is connected to the first end of the second segment.

[0007] As a possible implementation method, the monopole antenna unit is arranged in a U shape, including a first radiating branch, a second radiating branch and a third radiating branch connected in sequence; wherein the extension direction of the first radiating branch is parallel to the extension direction of the second radiating branch, and is perpendicular to the extension direction of the third radiating branch; the end of the first radiating branch away from the third radiating branch is the feeding end of the monopole antenna unit.

[0008] As a possible implementation method, the slot antenna unit is arranged in a U shape, including a first slot, a second slot and a third slot connected in sequence, wherein the extension direction of the first slot is parallel to the extension direction of the second slot and perpendicular to the extension direction of the third slot, and the length of the first slot is greater than that of the second slot.

[0009] As a possible implementation manner, the slot antenna unit further includes an opening portion, which is disposed between the first slot and an edge of the floor, and the opening portion divides the first slot into a first sub-slot and a second sub-slot.

[0010] As a possible implementation manner, the antenna unit also includes a matching adjustment circuit, which is connected to the feed point and is used to adjust the radiation frequency of the antenna unit so that the antenna unit can radiate signals of multiple frequency bands; the signals of the multiple frequency bands include signals of B41 band, N78 band, N79 band and WiFi 5G band, wherein the signal of B41 band is radiated by the monopole antenna unit and the slot antenna unit, the signal of N78 band is radiated by the monopole antenna unit, the left-hand mode of the inverted-F antenna unit and the first sub-slot in the slot antenna unit, the signal of N79 band is radiated by the inverted-F antenna unit, and the signal of WiFi 5G band is radiated by the inverted-F antenna unit, the monopole antenna unit and the slot antenna unit.

[0011] As a possible implementation manner, the inverted-F antenna unit and the monopole antenna unit are in the same plane.

[0012] As a possible implementation manner, the floor is rectangular, the at least one antenna unit includes four antenna units, the four antenna units are symmetrically arranged on the floor, and the four units are arranged close to the corners of the floor.

[0013] The electronic device provided in the embodiment of the present application adopts a monopole antenna unit, a planar inverted F antenna unit and a floor slot structure under the existing framework to achieve coverage of multiple frequency bands under sub-6G. By reasonably setting the structure of each antenna unit and adopting folding technology, the space occupied by the antenna is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of an electronic device provided in an embodiment of the present application.

[0015] Figure 2 yes Figure 1 A partial enlarged view of the antenna unit in FIG.

[0016] Figure 3 It is a schematic diagram of the S-parameter simulation results of the antenna unit provided in the embodiment of the present application.

[0017] Figure 4 This is a schematic diagram of the current distribution of the antenna unit in the B41 frequency band.

[0018] Figure 5 This is a schematic diagram of the current distribution of the antenna unit in the N78 frequency band.

[0019] Figure 6 This is a schematic diagram of the current distribution of the antenna unit in the N79 frequency band.

[0020] Figure 7 This is a schematic diagram of the current distribution of the antenna unit under the WiFi 5G frequency band.

[0021] Figure 8 It is a schematic diagram of simulation results of isolation between antennas of an electronic device provided in an embodiment of the present application.

[0022] Fig. 9 It is a schematic diagram of simulation results of the antenna efficiency of the electronic device provided in the embodiment of the present application.

[0023] Fig.10 It is a schematic diagram of simulation results of the relevant envelope coefficients of the antenna of the electronic device provided in the embodiment of the present application. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0025] With the rapid development of wireless mobile communication technology, the 5G era has arrived, and people are more inclined to pursue higher transmission rates, larger channel capacity and more reliable transmission performance. However, the spectrum resources in wireless communication are limited, and the signal also faces problems such as multipath fading during transmission, which seriously hinder the development of mobile communication technology.

[0026] Multiple input multiple output (MIMO) technology can effectively solve these problems. MIMO technology refers to the use of multiple transmitting antennas and receiving antennas at the transmitting end and the receiving end respectively, so that the signal is transmitted and received through multiple antennas at the transmitting end and the receiving end, thereby improving the communication quality. It can make full use of spatial resources and achieve multiple transmission and multiple reception through multiple antennas. Without increasing spectrum resources and antenna transmission power, it can multiply the system channel capacity, showing obvious advantages and is regarded as the core technology of the next generation of mobile communications.

[0027] As mentioned above, in order to implement the above MIMO technology, multiple antennas need to be set in the communication device. The antennas in existing mobile phones and other communication devices either produce narrow impedance bandwidth or need to occupy a large space. However, the space that can be used in this type of communication device is very limited. Therefore, it is particularly important for the antenna system to achieve high isolation and low correlation in multiple working frequency bands in a limited space without affecting the normal operation of the antenna unit.

[0028] In addition, most existing antenna solutions are single-band or dual-band antennas, which cannot cover multiple frequency bands of Sub-6Ghz. This requires additional space to build antennas for other frequency bands, resulting in low space utilization.

[0029] In view of the above problems, an embodiment of the present application provides an electronic device.

[0030] In order to facilitate the understanding of the present application, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application, and the preferred implementation methods of the present application are provided in the accompanying drawings. However, the present application can be implemented in many different ways and is not limited to the implementation methods described herein. On the contrary, the purpose of providing these implementation methods is to make the disclosure of the present application more thoroughly understood. The present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0031] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0032] In the description of the embodiments of the present application, the term "including" and similar terms should be understood as open inclusion, that is, "including but not limited to". The term "based on" should be understood as "based at least in part on". The term "one embodiment" or "the embodiment" should be understood as "at least one embodiment". The terms "first", "second", etc. may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0033] It should be understood that in the present application, "connection" and "connected" may refer to a mechanical connection relationship or a physical connection relationship, that is, A and B are connected or A and B are connected may mean that there are fastening components (such as screws, bolts, rivets, etc.) between A and B, or A and B are in contact with each other and A and B are difficult to separate.

[0034] It should be understood that in the present application, "coupling" can be understood as direct coupling and / or indirect coupling. Direct coupling can also be referred to as "electrical connection", which is understood as the physical contact and electrical conduction between components; it can also be understood as the connection between different components in the circuit structure through physical lines such as printed circuit board (PCB) copper foil or wires that can transmit electrical signals; "indirect coupling" can be understood as two conductors being electrically conductive in an air-spaced / non-contact manner. In one embodiment, indirect coupling can also be referred to as capacitive coupling, for example, signal transmission is achieved by coupling between the gaps between two conductive parts to form an equivalent capacitor.

[0035] Connection: The above-mentioned "electrical connection" or "indirect coupling" method is used to make two or more components conductive or connected to each other for signal / energy transmission, which can be called connection.

[0036] Radiator: It is a device in the antenna used to receive / send electromagnetic wave radiation. In some cases, the "antenna" in a narrow sense is understood as a radiator, which converts the waveguide energy from the transmitter into radio waves, or converts radio waves into waveguide energy, which is used to radiate and receive radio waves. The modulated high-frequency current energy (or waveguide energy) generated by the transmitter is transmitted to the transmitting radiator via the feeder line, and is converted into a certain polarized electromagnetic wave energy by the radiator and radiated in the desired direction. The receiving radiator converts a certain polarized electromagnetic wave energy from a specific direction in space into modulated high-frequency current energy, which is transmitted to the receiver input via the feeder line.

[0037] The radiator can be a conductor with a specific shape and size, such as a wire antenna. A wire antenna is an antenna composed of one or more metal wires whose wire diameter is much smaller than the wavelength and whose length is comparable to the wavelength. It is mainly used in long, medium, short wave and ultra-short wave bands as a transmitting or receiving antenna. The main forms of wire antennas include dipole antennas, half-wave oscillator antennas, cage antennas, monopole antennas, whip antennas, tower antennas, spherical antennas, magnetic antennas, V-shaped antennas, diamond antennas, fishbone antennas, Yagi antennas, log-periodic antennas, antenna arrays, etc. For dipole antennas, each dipole antenna usually includes two radiating branches, and each branch is fed by a feeding unit from the feeding end of the radiating branch.

[0038] The radiator can also be a slot or slit formed on the conductor. For example, an antenna formed by a slit on the conductor surface is called a slot antenna or a slot antenna. The typical slot shape is a long strip with a length of about half a wavelength. The slot can be fed by a transmission line connected across its narrow side, or by a waveguide or a resonant cavity. In this case, a radio frequency electromagnetic field is excited on the slot, and electromagnetic waves are radiated into space.

[0039] Feeder, also called transmission line, refers to the connection line between the antenna transceiver and the radiator. The system that connects the antenna radiator and the transceiver is called the feed system. Feeder is divided into wire transmission line, coaxial transmission line, waveguide or microstrip line according to the frequency. Feed point refers to the connection point on the radiator that is connected to the feeder.

[0040] Ground / floor: can refer to at least a part of any grounding layer, grounding plate, or grounding metal layer, etc. in an electronic device, or at least a part of any combination of any of the above grounding layers, grounding plates, or grounding components, etc., and "ground / floor" can be used for grounding components in electronic devices. In one embodiment, the "ground / floor" can be the grounding layer of the circuit board of the electronic device, or it can be the grounding plate formed by the frame of the electronic device or the grounding 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 to 14-layer board with 8, 10, 12, 13 or 14 layers of conductive materials, or an element separated and electrically insulated by a dielectric layer or insulating layer such as glass fiber, polymer, etc. In one embodiment, the circuit board includes a dielectric substrate, a grounding layer and a routing layer, and the routing layer and the grounding layer are electrically connected through vias. In one embodiment, components such as a display, a touch screen, input buttons, a transmitter, a processor, a memory, a battery, a charging circuit, a system on chip (SoC) structure, etc. can be mounted on or connected to a circuit board; or electrically connected to a wiring layer and / or a ground layer in the circuit board. For example, a radio frequency source is disposed on the wiring layer.

[0041] Any of the above-mentioned grounding layers, grounding plates, or grounding metal layers are made of conductive materials. In one embodiment, the conductive material can be any of the following materials: copper, aluminum, stainless steel, brass and their alloys, copper foil on an insulating substrate, aluminum foil on an insulating substrate, gold foil on an insulating substrate, silver-plated copper, silver-plated copper foil on an insulating substrate, silver foil and tin-plated copper on an insulating substrate, cloth impregnated with graphite powder, graphite-coated substrates, copper-plated substrates, brass-plated substrates, and aluminum-plated substrates. It will be appreciated by those skilled in the art that the grounding layer / grounding plate / grounding metal layer can also be made of other conductive materials.

[0042] Resonant frequency: The resonant frequency is also called the resonance frequency. The resonant frequency can refer to the frequency at which the imaginary part of the antenna input impedance is zero. 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 frequency. The return loss characteristic of the center frequency can be less than -20dB.

[0043] Working frequency band: Regardless of the type of antenna, it always works within a certain frequency range (band width). For example, an antenna that supports the B40 frequency band has a working frequency band that includes frequencies in the range of 2300MHz to 2400MHz, or in other words, the working frequency band of the antenna includes the B40 frequency band. The frequency range that meets the index requirements can be regarded as the working frequency band of the antenna. The width of the working frequency band is called the working bandwidth. The working bandwidth of an omnidirectional antenna may reach 3-5% of the center frequency. The working bandwidth of a directional antenna may reach 5-10% of the center frequency. The bandwidth can be considered as a frequency range on both sides of the center frequency (for example, the resonant frequency of a dipole), where the antenna characteristics are within the acceptable value range of the center frequency.

[0044] The present application provides an electronic device, which is an electronic device with wireless communication function. The electronic device can be, for example, a handheld device, a vehicle-mounted device, a wearable device, a computing device or other processing device that can be connected to a wireless communication network, as well as various forms of user devices, etc.

[0045] like Figure 1 The electronic device 100 provided in the embodiment of the present application is shown as a schematic structural diagram. The electronic device includes a base 110 and at least one antenna unit 120.

[0046] The embodiment of the present application does not specifically limit the number of antenna units 120 in the electronic device 100. Different numbers of antenna units correspond to different MIMO configurations, so the number of antenna units can be set according to the MIMO configuration parameters. For example, when the electronic device 100 includes two antenna units 120, the electronic device supports 2*2MIMO, that is, using the two electronic devices to achieve one-transmit-two-receive (1T2R) or two-transmit-two-receive (2T2R); for another example, when the number of antenna units 120 is 4, the electronic device supports 4*4MIMO, thereby achieving 1T4R or 2T4T or 4T4R.

[0047] It should also be noted that in the embodiment of the present application, when the electronic device 100 includes multiple antenna units 120, the structures of the multiple antenna units 120 are set to be the same. The antenna units 120 in the embodiment of the present application are configured to support the transmission and reception of radio frequency signals of multiple frequency bands, so the electronic device supports multi-band MIMO.

[0048] The technical solution of the present application is further described below by taking one of the antenna units as an example, where the antenna unit is any one of the above-mentioned multiple antenna units.

[0049] See also Figure 2 , Figure 2 for Figure 1 A partial enlarged view of the antenna unit 120 in FIG. Figure 2 The antenna unit 120 includes an inverted-F antenna unit 121, a monopole antenna unit 122, a slot antenna unit 123, a feed line 124 and a feed point 125.

[0050] The inverted-F antenna unit 121 and the monopole antenna unit 122 are disposed at the edge of the floor 110 and are perpendicular to the floor 110 .

[0051] The inverted-F antenna unit 121 has a ground terminal 121A and a feeding terminal 121B, wherein the ground terminal 121A is connected to the floor 110 to achieve grounding through the floor 110 ; and the feeding terminal 121B is connected to a feeding point 125 through a feeding line 124 .

[0052] The feed line 124 is disposed parallel to the floor 110 , a first end 124A of the feed line 124 is electrically connected to the feed point 125 , and a second end 124B of the feed line 124 is electrically connected to the feed end 121B of the inverted-F antenna unit 121 .

[0053] The electrical connection mentioned in the embodiment of the present application is also called electrical connection. The electrical connection between the feed line 124 and the inverted-F antenna unit 121 can be a direct connection between the feed line 124 and the feeding end 121B of the inverted-F antenna unit 121, or it can be an indirect connection through an intermediate conductive member, which can be, for example, a connecting wire or a thin sheet of metal, such as a magnesium alloy sheet or an aluminum alloy sheet.

[0054] The slot antenna unit 123 is disposed on the floor and is located beside the feeder line 124 . The slot antenna unit 123 may be an L-shaped slot antenna or a U-shaped slot antenna.

[0055] The slot antenna unit 123 is formed by cutting a groove on the floor 110 , which reduces the complexity of the antenna structure and solves the problem of low overall radiation efficiency of the antenna unit due to coupling between multiple antenna branches.

[0056] It should also be noted that the floor 110 in the embodiment of the present application can be regarded as a reference ground, and the grounding end of the inverted-F antenna unit 121 can be fixedly connected to the floor 110 by welding, or can be connected to the floor 110 by screw connection and locking. In other embodiments, the grounding end can also be connected to the floor 110 by a connecting wire, and the embodiment of the present application does not make further limitations on this.

[0057] The electronic device provided in the embodiment of the present application adopts a monopole antenna unit, a planar inverted F antenna unit and a floor slot structure within the framework of the existing electronic device, thereby achieving coverage of multiple frequency bands under sub-6G. By reasonably setting the structure of each antenna unit and adopting folding technology, the space occupied by the antenna is greatly reduced.

[0058] The structure of the electronic device is further described below in conjunction with the accompanying drawings. In some embodiments, the inverted-F antenna unit 121 includes a grounding branch 1211 , a feeding branch 1212 , and a radiation branch 1213 .

[0059] Among them, the grounding branch 1211 has a first end 1211A and a second end 1211B, the first end 1211A is connected to the floor 110, the second end 1211B is connected to the first end 1212A of the feeding branch 1212 and the first end 1213A of the radiation branch 1213, the second end 1212B of the feeding branch 1212 forms the feeding end 121B of the inverted-F antenna unit 121, and the first end 1211A of the grounding branch 1211 forms the grounding end 121A of the inverted-F antenna unit 121.

[0060] Continue reading Figure 2 , Figure 2 The antenna unit 120 also includes a connecting section 126, a first end 126A of the connecting section 126 is connected to the second end 1212B of the feeding branch 1212 (ie, the feeding end 121B of the inverted-F antenna unit 121), and a second end 126B is connected to the second end 124B of the feed line 124.

[0061] In some embodiments, Figure 2 As shown, the extending direction of the ground branch 1211 is perpendicular to the floor 110 , and the extending direction of the feeding branch 1212 is parallel to the floor 110 .

[0062] Figure 2 The radiation branch 1213 in the embodiment includes a first section 12131 and a second section 12132. The first end 12131A of the first section 12131 is connected to the second end 1211B of the ground branch 1211, and the second end 12131B of the first section 12131 is connected to the first end 12132A of the second section 12132. The radiation branch 1213 is also called a radiation arm of the inverted-F antenna unit 121.

[0063] In some embodiments, the monopole antenna unit 122 is arranged in a U shape, including a first radiation branch 1221, a second radiation branch 1222 and a third radiation branch 1223 connected in sequence.

[0064] The extension direction of the first radiation branch 1221 is parallel to the extension direction of the second radiation branch 1222, and is perpendicular to the extension direction of the third radiation branch; that is, the first radiation branch 1221 and the second radiation branch 1222 are the two long sides of the U-shape of the monopole antenna unit 122, and the third radiation branch 1223 is the short side. The feeding end 122A of the monopole antenna unit 122 is the end of the first radiation branch 1221 away from the third radiation branch.

[0065] In some embodiments, the feeding end 122A of the monopole antenna 122 is connected to the feed line 124 through the connecting section 126; and more specifically, as Figure 2 As shown, the feeding end 122A is connected in the middle of the connecting section 126 , that is, between the first end 126A and the second end 126B of the connecting section 126 .

[0066] In some embodiments, the inverted-F antenna unit 121 and the monopole antenna 122 are arranged on the same plane, and the plane is preferably perpendicular to the floor 110, so as to ensure that both antenna units have a larger clearance area.

[0067] It should also be noted that each branch in the inverted-F antenna unit 121 and the monopole antenna 122 can be made of metal sheets, for example, magnesium alloy sheets or aluminum alloy sheets, which are commonly used materials in the art.

[0068] Continue reading Figure 2 The slot antenna unit 123 is arranged in a U shape, including a first slot 1231, a second slot 1232 and a third slot 1232 connected in sequence; wherein the extension direction of the first slot 1231 is parallel to the extension direction of the second slot 1232, and is perpendicular to the extension direction of the third slot 1232, that is, the first slot 1231 and the second slot 1232 constitute the two long sides of the U-shaped slot antenna. In the slot antenna unit 123, the length of the first slot 1231 is greater than the length of the second slot 1232.

[0069] In some embodiments, Figure 2 The slot antenna in the embodiment further includes an opening portion 1234, which is disposed between the first slot 1232 and an edge of the floor 110, and the opening portion divides the first slot 1231 into a first sub-slot 1231A and a second sub-slot 1231B.

[0070] In some embodiments, the antenna unit 120 further includes a matching adjustment circuit, which is connected to the feeder and is used to adjust the radiation frequency of the antenna unit 120 so that the antenna unit can radiate signals in multiple frequency bands.

[0071] Specifically, the signals of the multiple frequency bands include signals of the B41 frequency band, the N78 frequency band, the N79 frequency band and the WiFi 5G frequency band.

[0072] Among them, the signal of the B41 frequency band is radiated by the monopole antenna unit 122 and the slot antenna unit 123, the signal of the N78 frequency band is radiated by the monopole antenna unit 122, the left-hand mode of the inverted-F antenna unit 121 and the second sub-slot 1231B of the slot antenna unit 123, the signal of the N79 frequency band is radiated by the inverted-F antenna unit 121, and the signal of the WiFi 5G frequency band is radiated by the inverted-F antenna unit 121, the monopole antenna unit 122 and the slot antenna unit 123.

[0073] In order to further illustrate the radiation characteristics of the antenna unit, Figure 3 As shown, the S parameter simulation results of the antenna unit are given. Figure 3 The antenna return loss of the antenna unit 120 is shown in FIG. 1 , which can be understood as the ratio of the signal power reflected back to the antenna port through the antenna circuit to the transmit power of the antenna port. The smaller the reflected signal is, the larger the signal radiated into space through the antenna is, and the greater the radiation efficiency of the antenna is. The larger the reflected signal is, the smaller the signal radiated into space through the antenna is, and the lower the radiation efficiency of the antenna is.

[0074] As can be seen from the figure, the antenna unit has four relatively obvious resonant frequency points within the band, namely points 1-4 shown in the figure, and their resonant frequencies are 2.48GHz, 3.5GHz, 4.62GHz and 5.9GHz respectively. The four frequency points correspond to the B41 band, N78 band, N79 band and WiFi 5G band mentioned above respectively.

[0075] Figure 4-Figure 7 The current distribution of the antenna unit 120 in the above-mentioned multiple different frequency bands is respectively given. Figure 4-Figure 7 It can be seen that in the B41 frequency band, the current is concentrated in the monopole antenna unit 122 and the slot antenna unit 123; in the N78 frequency band, the current on the surface of the antenna unit is concentrated in the feeding branch 1212 of the inverted-F antenna unit 121, the second sub-slot 1231B, the second slot 1232 and the third slot 1233 of the slot antenna unit 123, and the inverted-F antenna works in the left-hand mode; in the N79 frequency band, the current is concentrated in the inverted-F antenna unit; in the WiFi 5G frequency band, the current is concentrated in the feeding branch 1212 of the inverted-F antenna unit 121, the monopole antenna unit 122 and the first sub-slot 1231A of the analysis antenna unit 123.

[0076] Re-read Figure 1 In some embodiments, the floor 110 in the electronic device 100 is rectangular, and the electronic device 100 includes four antenna units 120, which are symmetrically arranged on the floor 110, and the four antenna units are arranged near the corners of the floor 110.

[0077] exist Figure 1 In the technical solution shown, by setting four antenna units, a 4*4 antenna array is obtained, and the antenna array can have good diversity characteristics.

[0078] Figure 8 and Fig. 9 They are Figure 1 The simulation results of the isolation between antennas and antenna efficiency in the electronic device in . Among them, the isolation of the antenna refers to the ratio of the signal received by another antenna to the signal of the transmitting antenna when one antenna transmits a signal. Isolation is a physical quantity used to measure the degree of mutual coupling between antennas. Assuming that the two antennas form a two-port network, the isolation between the two antennas is S21 and S12 between the antennas. Antenna isolation can be represented by S21 and S12 parameters. S21 and S12 parameters are usually negative numbers. The smaller the S21 and S12 parameters are, the greater the isolation between the antennas and the smaller the mutual coupling between the antennas; the larger the S21 and S12 parameters are, the smaller the isolation between the antennas and the greater the mutual coupling between the antennas.

[0079] from Figure 8 It can be seen that the separation of the four antenna units within the frequency band is less than -10dB, and, except for the B41 band, the other three bands are all -20dB. Fig. 9 From the antenna efficiency diagram, we can see that the antenna component can maintain high efficiency throughout the entire radiation frequency band.

[0080] Fig.10 yes Figure 1 The simulation results of the envelope correlation coefficient (ECC) of multiple antenna units in the electronic device in FIG. The coefficient is used to characterize the correlation between the amplitudes of received signals between different antenna units and is an important parameter indicator for measuring the diversity performance and coupling performance of MIMO antennas. Fig.10 It can be seen that in multiple operating frequency bands of the antenna, the ECC value is less than 0.2, which indicates that Figure 1 The multiple antenna units in the electronic device have good diversity characteristics.

[0081] In this embodiment, the electronic device may be a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), a mobile internet device (MID) or a wearable device, etc.

[0082] It should be understood that the units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0083] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An electronic device, characterized in that: include: a floor and at least one antenna unit; Each of the antenna units includes: an inverted F antenna unit, a monopole antenna unit, a slot antenna unit, a feed line and a feed point; Among them, the inverted-F antenna unit and the monopole antenna unit are arranged at the edge of the floor and perpendicular to the floor; the feed line is arranged parallel to the floor, the first end of the feed line is connected to the feeding point, the second end is electrically connected to the feeding end of the inverted-F antenna unit and the feeding end of the monopole antenna unit, and the ground end of the inverted-F antenna is connected to the floor; the slot antenna unit is arranged on the floor and is located next to the feed line.

2. The electronic device according to claim 1, characterized in that: The inverted-F antenna unit includes a ground branch, a feeding branch and a radiation branch; The first end of the grounding branch is connected to the floor, the second end of the grounding branch is connected to the first end of the feeding branch and the first end of the radiation branch, and the second end of the feeding branch forms the feeding end of the inverted-F antenna; The antenna unit further comprises a connecting section, a first end of which is connected to the second end of the feeding branch, and a second end of which is connected to the second end of the feed line.

3. The electronic device according to claim 2, characterized in that: The extending direction of the grounding branch is perpendicular to the floor, and the extending direction of the feeding branch is parallel to the floor; The radiation branch includes a first segment and a second segment, the extension direction of the first segment is perpendicular to the extension direction of the second segment, the first end of the first segment is connected to the second end of the grounding branch, and the second end of the first segment is connected to the first end of the second segment.

4. The electronic device according to claim 2, characterized in that: The monopole antenna unit is arranged in a U shape, including a first radiation branch, a second radiation branch and a third radiation branch connected in sequence; Wherein, the extension direction of the first radiation branch node is parallel to the extension direction of the second radiation branch node, and is perpendicular to the extension direction of the third radiation branch node; One end of the first radiation branch away from the third radiation branch is the feeding end of the monopole antenna unit.

5. The electronic device according to claim 4, characterized in that: The slot antenna unit is arranged in a U shape, including a first slot, a second slot and a third slot connected in sequence, wherein the extension direction of the first slot is parallel to the extension direction of the second slot and perpendicular to the extension direction of the third slot, and the length of the first slot is greater than that of the second slot.

6. The electronic device according to claim 5, characterized in that: The slot antenna unit further includes an opening portion, which is disposed between the first slot and an edge of the floor, and the opening portion divides the first slot into a first sub-slot and a second sub-slot.

7. The electronic device according to claim 6, characterized in that: The antenna unit further includes a matching adjustment circuit connected to the feed point and configured to adjust the radiation frequency of the antenna unit so that the antenna unit can radiate signals of multiple frequency bands; The signals of the multiple frequency bands include signals of the B41 frequency band, the N78 frequency band, the N79 frequency band and the WiFi 5G frequency band, wherein the signal of the B41 frequency band is radiated by the monopole antenna unit and the slot antenna unit, the signal of the N78 frequency band is radiated by the monopole antenna unit, the left-hand mode of the inverted-F antenna unit and the first sub-slot in the slot antenna unit, the signal of the N79 frequency band is radiated by the inverted-F antenna unit, and the signal of the WiFi 5G frequency band is radiated by the inverted-F antenna unit, the monopole antenna unit and the slot antenna unit.

8. The electronic device according to claim 4, characterized in that: The inverted-F antenna unit and the monopole antenna unit are in the same plane.

9. The electronic device according to any one of claims 1 to 8, characterized in that: The floor is rectangular, the at least one antenna unit includes four antenna units, the four antenna units are symmetrically arranged on the floor, and the four units are arranged close to the corners of the floor.

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