Antenna devices and electronic equipment

Abstract

An antenna design scheme employs a single-feed design on a conductor of a specific shape (e.g., a strip conductor or a slotted conductor) to excite multiple antenna modes. For example, feeding a strip conductor can excite a CM line antenna mode and a DM line antenna mode. Similarly, feeding a slotted conductor can feed a CM slot antenna mode and a DM slot antenna mode. This antenna design scheme can achieve antenna miniaturization while covering multiple frequency bands.

Description

Technical Field

[0001] This invention relates to the field of antenna technology, and in particular to antenna devices used in electronic devices. Background Technology

[0002] Multiple-input multiple-output (MIMO) technology plays a crucial role in 5G wireless communication systems. However, achieving good MIMO performance in mobile terminals, such as smartphones, remains a significant challenge. One reason is that the extremely limited internal space of mobile terminals restricts the frequency bands that MIMO antennas can cover and the level of performance they can deliver. Summary of the Invention

[0003] This invention provides an antenna device that can achieve antenna miniaturization while covering more frequency bands.

[0004] In a first aspect, this application provides an electronic device including an antenna device. The antenna device may include: a strip conductor, on which a feed point and a ground point are disposed.

[0005] The feed point can be located in the middle of the strip conductor. The feed point can be connected to a feed source. The positive terminal of the feed source can be connected to the feed point, and the negative terminal of the feed source can be connected to ground (such as a floor).

[0006] On a strip conductor, the grounding point can be located near the feed point. The grounding point can be connected to a grounding branch. The grounding branch can be used to connect to ground (such as a floor). Here, "nearby" can mean that the length between the feed point and the grounding terminal A of the grounding branch is less than 1 / 4 of the operating wavelength 1. That is, the distance L between the feed point and the grounding point... BC Length L of the grounded branch CA The sum of these values ​​is less than 1 / 4 of the working wavelength.

[0007] Two currents with different frequencies flow along a strip conductor: a first current and a second current. The first current flows in opposite directions on either side of the feed point, while the second current flows in the same direction on either side of the feed point. The first current is the current in CM line antenna mode, and the second current is the current in DM line antenna mode. Because there are two currents with different frequencies on the strip conductor, two different resonant frequencies can be generated. In the first aspect, the first current can be referred to as the first current, and the second current as the second current.

[0008] The aforementioned operating wavelength 1 (i.e., the operating wavelength of the CM line antenna mode) can be calculated based on the frequency f1 of the first current. Specifically, the operating wavelength 1 of the radiated signal in air can be calculated as follows: Wavelength = Speed ​​of light / f1. The operating wavelength 1 of the radiated signal in a medium can be calculated as follows: Where ε is the relative permittivity of the medium. In the first aspect, the aforementioned operating wavelength 1 can be referred to as the first wavelength.

[0009] As can be seen, the antenna design provided in the first aspect can use a strip conductor to excite two line antenna modes: CM line antenna mode and DM line antenna mode, achieving coverage of multiple frequency bands while miniaturizing the antenna.

[0010] In conjunction with the first aspect, in some embodiments, the electronic device may include a floor, and a grounding branch may be specifically connected to the floor. A third current may be distributed on the floor, the frequency of which differs from, and may be lower than, the frequencies of the first and second currents.

[0011] In conjunction with the first aspect, in some embodiments, the electronic device may include a metal frame, with the strip conductor constituting a portion of the metal frame. This portion of the metal frame may be a metal frame located at the bottom of the electronic device or a metal frame located at the top of the electronic device.

[0012] In conjunction with the first aspect, in some embodiments, a grounding stub may connect the metal frame and the ground plane, and may be, for example, a metal spring attached to the ground plane connecting a strip conductor. The ground plane may include: a printed circuit board (PCB) ground plane of an electronic device, or a metal frame of an electronic device.

[0013] In conjunction with the first aspect, in some embodiments, the feed point can be offset from the center of the strip conductor to cover more frequency bands. In this case, grounding branches do not need to be set near the feed point, i.e., the grounding branches can be removed.

[0014] A strip conductor can carry more currents with different frequencies.

[0015] Secondly, this application provides an electronic device that may include an antenna device. The antenna device may include: a metal plate with slots, wherein...

[0016] An opening may be provided at the middle position of the first side of the slot. At the first position of the slot, the positive electrode of the feed is connected to the first side of the slot, and the negative electrode of the feed is connected to the second side of the slot. The first position may be set near the opening 33. Here, "near" can mean that the distance L3 between the feed position 35 and the opening 33 is less than 1 / 4 of the operating wavelength 2. In the second aspect, the operating wavelength 2 can be referred to as the first wavelength.

[0017] A first current and a second current exist around a slot on a metal plate. The first and second currents have different frequencies. The first current is distributed in the same direction around the slot; the second current is distributed in opposite directions on both sides of the slot opening. The first current is the current in CM slot antenna mode, and the second current is the current in DM slot antenna mode. The first wavelength is determined by the frequency of the first current.

[0018] As can be seen, the antenna design provided in the second aspect can use a slotted conductor to excite two slotted antenna modes: CM slotted antenna mode and DM slotted antenna mode, achieving coverage of multiple frequency bands while miniaturizing the antenna.

[0019] In conjunction with the second aspect, in some embodiments, the electronic device may include a floor, and the metal plate may be the floor. The floor may include: a printed circuit board (PCB) floor of the electronic device, or a metal frame of the electronic device.

[0020] Thirdly, this application provides an electronic device including an antenna device. The antenna device may include: at least one linear antenna and a slotted antenna, wherein the slotted antenna may include a metal plate with a slot, wherein...

[0021] A feed can be connected to the middle position of the slot antenna. The positive terminal of the feed is connected to one side of the slot, and the negative terminal is connected to the other side of the slot. The wire antenna can be parallel to the plane of the metal plate. The intersection of the projection of the wire antenna on the metal plate and the slot can be located at the middle position of the projection. The distance between the intersection and the middle position of the slot antenna can be less than 1 / 2 of the first wavelength. The first wavelength is the operating wavelength of the slot antenna.

[0022] A first current can be distributed around the slot on the slot antenna. The first current has opposite directions on both sides of the middle position of the slot antenna. A second current has the same direction distributed on the linear antenna.

[0023] As can be seen, the antenna design scheme provided in the third aspect allows the fed slot antenna to operate in DM slot antenna mode while simultaneously coupling one or more line antennas to operate in DM line antenna mode, thus covering multiple frequency bands. Furthermore, the line antenna can be designed as a floating antenna mounted on the back cover, without occupying internal design space in the electronic device and being minimally affected by internal components.

[0024] In conjunction with the third aspect, in some embodiments, the distance from the linear antenna to the plane where the metal plate is located can be less than the first distance, such as less than 1 mm. It should be understood that the smaller the coupling spacing, the stronger the coupling effect. This application does not limit the specific value of this coupling spacing, as long as it satisfies the requirement that the slotted antenna can couple the suspended linear antenna.

[0025] In conjunction with the third aspect, in some embodiments, at least one wire antenna can be two or more wire antennas of different lengths. The projections of these two or more wire antennas onto the metal plate can be parallel to each other. These two or more wire antennas can coexist in a first plane, which can be parallel to the plane in which the metal plate is located. Because of their different lengths, the frequencies of the second currents distributed on these two or more wire antennas are also different.

[0026] In conjunction with the third aspect, in some embodiments, the wire antenna can be a floating antenna, which can be disposed on the inner surface of the back cover, the outer surface of the back cover, or embedded in the back cover. For example, the wire antenna can be a metal strip pasted to the inner surface of the back cover, or it can be printed on the inner surface of the back cover using conductive silver paste.

[0027] In conjunction with the third aspect, in some embodiments, the electronic device may include a floor, and the metal plate may be the floor. The floor may include: a printed circuit board (PCB) floor of the electronic device, or a metal frame of the electronic device.

[0028] Fourthly, this application provides an electronic device including an antenna device, which may include: a wire antenna and a slot antenna, wherein...

[0029] A feed source can be connected to the middle position of a line antenna; that is, the feed position of the line antenna can be the middle position. Specifically, the positive terminal of the feed source can be connected to one side of this middle position, and the negative terminal of the feed source can be connected to the other side of this middle position. A slot antenna may include a metal plate and a slot. A slot antenna can be formed by cutting a slot in a metal plate (such as a PCB floor). The slot can be filled with materials such as polymers, glass, ceramics, or combinations of these materials.

[0030] The wire antenna can be parallel to the plane where the slot antenna is located and perpendicular to the slot of the slot antenna. This plane can be called the slotted surface, i.e., the plane where the aforementioned metal plate is located. The projection of the wire antenna onto the slotted surface and the slot of the slot antenna can intersect at the midpoint of this projection. The distance L6 from the intersection A of the projection of the wire antenna onto the slotted surface and the slot to the midpoint B of the slot antenna can be greater than 1 / 8 of the operating wavelength 4 and less than 1 / 2 of the operating wavelength 4. The operating wavelength 4 refers to the operating wavelength of the slot antenna. In the fourth aspect, the operating wavelength 4 can be referred to as the first wavelength.

[0031] The slot antenna has opposite currents distributed around the slot, on both sides of the middle position of the slot antenna; the wire antenna has currents distributed in the same direction on both sides of the middle position.

[0032] As can be seen, the antenna design scheme provided in the fourth aspect allows the fed line antenna to operate in DM line antenna mode while simultaneously coupling a slot antenna to operate in DM slot antenna mode, thus covering multiple frequency bands. The line antenna can be designed as a floating antenna mounted on the back cover, without occupying internal design space of the electronic device and being minimally affected by internal components. In this antenna structure, the fed line antenna can also couple more slot antennas of different sizes to cover even more frequency bands.

[0033] In conjunction with the fourth aspect, in some embodiments, the wire antenna can be a floating antenna, which can be disposed on the inner surface of the back cover, the outer surface of the back cover, or embedded in the back cover. For example, the wire antenna can be a metal strip pasted to the inner surface of the back cover, or it can be printed on the inner surface of the back cover using conductive silver paste.

[0034] In conjunction with the fourth aspect, in some embodiments, the electronic device may include a floor, and the metal plate may be the floor. The floor may include: a printed circuit board (PCB) floor of the electronic device, or a metal frame of the electronic device.

[0035] Fifthly, this application provides an electronic device including an antenna device, which may include: a wire antenna or a slot antenna.

[0036] A linear antenna has a feed point, which can be located at the center of the linear antenna. The feed point is connected to the positive terminal of the feed source, and the negative terminal of the feed source is connected to ground. A slot antenna may include a metal plate with a slot, and an opening may be formed at the center of the first side of the slot.

[0037] The wire antenna can be positioned perpendicular to the plane of the metal plate at its center. The positive terminal of the feed connected to the wire antenna is located on one side of the opening, and the negative terminal of the feed connected to the wire antenna is located on the other side of the opening.

[0038] A slot antenna can have a current in the same direction distributed around the slot. A wire antenna can have currents in opposite directions distributed on both sides of the middle position of the wire antenna.

[0039] As can be seen, the antenna design scheme provided in the fifth aspect allows the fed line antenna to operate in CM line antenna mode while simultaneously coupling a slot antenna to operate in CM slot antenna mode, thus covering multiple frequency bands. In this antenna structure, the fed line antenna can also couple more slot antennas of different sizes to cover even more frequency bands.

[0040] In conjunction with the fifth aspect, in some embodiments, the electronic device may include a floor, and the metal plate may be the floor. The floor may include: a printed circuit board (PCB) floor of the electronic device, or a metal frame of the electronic device.

[0041] Sixthly, this application provides an electronic device including an antenna device, which may include: a wire antenna and a slot antenna. The slot antenna includes a metal plate with a slot, wherein...

[0042] An opening can be made in the middle of the first side of the slot, and a feed source can be connected to the opening. The positive terminal of the feed source is connected to one side of the opening, and the negative terminal of the feed source is connected to the other side of the opening.

[0043] The wire antenna can be positioned perpendicular to the plane of the metal plate at its center. The positive terminal of the feed connected to the wire antenna can be located on one side of the opening, and the negative terminal of the feed connected to the wire antenna can be located on the other side of the opening.

[0044] A slotted antenna can have currents in the same direction distributed around the slot, while a linear antenna can have currents in opposite directions distributed on both sides of the middle position.

[0045] As can be seen, the antenna design scheme provided in the sixth aspect allows the fed slot antenna to operate in CM slot antenna mode while also allowing the coupled line antenna to operate in CM line antenna mode, thus covering multiple frequency bands.

[0046] In conjunction with the sixth aspect, in some embodiments, the electronic device may include a floor, and the metal plate may be the floor. The floor may include: a printed circuit board (PCB) floor of the electronic device, or a metal frame of the electronic device.

[0047] In a seventh aspect, this application provides an electronic device including an antenna device, which may include: a wire antenna and a slot antenna, wherein...

[0048] A linear antenna may have a feed point, which may be located at the center of the linear antenna. The feed point is connected to the positive terminal of the feed source, and the negative terminal of the feed source is connected to ground. A slotted antenna may include a metal plate with slots.

[0049] A line antenna can be parallel to a slot antenna, and the line connecting the middle position of the line antenna and the middle position of the slot antenna can be perpendicular to both the line antenna and the slot antenna.

[0050] A linear antenna can have currents flowing in opposite directions on either side of its central position. A slot antenna can have currents flowing in opposite directions around its slot, on either side of its central position.

[0051] As can be seen, the antenna design provided in aspect seven allows the fed line antenna to operate in CM line antenna mode while simultaneously coupling a slot antenna to operate in DM slot antenna mode, thus covering multiple frequency bands. In this antenna structure, the fed line antenna can also couple more slot antennas of different sizes to cover even more frequency bands.

[0052] In conjunction with the seventh aspect, in some embodiments, the electronic device may include a floor, and the metal plate may be the floor. The floor may include: a printed circuit board (PCB) floor of the electronic device, or a metal frame of the electronic device.

[0053] Eighthly, this application provides an electronic device including an antenna device, which may include: a wire antenna and a slot antenna, wherein...

[0054] A slot antenna may include a metal plate with slots. A feed source may be connected to the middle of the slot antenna, with the positive terminal of the feed source connected to one side of the slot antenna and the negative terminal of the feed source connected to the other side of the slot antenna.

[0055] A line antenna can be parallel to a slot antenna, and the line connecting the middle position of the line antenna and the middle position of the slot antenna can be perpendicular to both the line antenna and the slot antenna.

[0056] A linear antenna can have currents in opposite directions on both sides of the middle position, while a slot antenna can have currents in opposite directions around the slot on both sides of the middle position.

[0057] As can be seen, the antenna design scheme provided in aspect eight allows the fed slot antenna to operate in DM slot antenna mode while simultaneously coupling a line antenna to operate in CM line antenna mode, thus covering multiple frequency bands. In this antenna structure, the fed slot antenna can also couple more line antennas of different sizes to cover even more frequency bands.

[0058] In conjunction with the eighth aspect, in some embodiments, the electronic device may include a floor, and the metal plate may be the floor. The floor may include: a printed circuit board (PCB) floor of the electronic device, or a metal frame of the electronic device.

[0059] Ninthly, this application provides an electronic device including an antenna device, which may include: a wire antenna and a slot antenna, wherein...

[0060] A feed can be connected to the middle position of a linear antenna, with the positive terminal of the feed connected to one side of the middle position and the negative terminal of the feed connected to the other side of the middle position. A slot antenna may include a metal plate with a slot, and an opening may be formed in the middle position of the first side of the slot.

[0061] A line antenna can be parallel to a slot antenna, and the line connecting the middle position of the line antenna and the middle position of the slot antenna can be perpendicular to both the line antenna and the slot antenna.

[0062] A linear antenna can have currents in the same direction distributed on both sides of the middle position of the linear antenna, while a slot antenna can have currents in the same direction distributed around the slot.

[0063] As can be seen, the antenna design provided in aspect nine allows the fed line antenna to operate in DM line antenna mode while simultaneously coupling a slot antenna to operate in CM slot antenna mode, thus covering multiple frequency bands. The line antenna can be designed as a floating antenna mounted on the back cover, without occupying internal design space of the electronic device and being minimally affected by internal components. In this antenna structure, the fed line antenna can also couple more slot antennas of different sizes to cover even more frequency bands.

[0064] In conjunction with the ninth aspect, in some embodiments, the electronic device may include a floor, and the metal plate may be the floor. The floor may include: a printed circuit board (PCB) floor of the electronic device, or a metal frame of the electronic device.

[0065] In a tenth aspect, this application provides an electronic device including an antenna device, which may include: a wire antenna and a slot antenna, wherein...

[0066] The slot antenna includes a metal plate with slots, and an opening can be formed in the middle of the first side of the slot. A feed can be connected to the opening, with the positive terminal of the feed connected to one side of the opening and the negative terminal of the feed connected to the other side of the opening.

[0067] A line antenna can be parallel to a slot antenna, and the line connecting the middle position of the line antenna and the middle position of the slot antenna can be perpendicular to both the line antenna and the slot antenna.

[0068] A linear antenna can have currents in the same direction distributed on both sides of the middle position of the linear antenna, while a slot antenna can have currents in the same direction distributed around the slot.

[0069] As can be seen, the antenna design scheme provided in aspect ten allows the fed slot antenna to operate in CM slot antenna mode while simultaneously coupling a line antenna to operate in DM line antenna mode, thus covering multiple frequency bands. The line antenna can be designed as a floating antenna mounted on the back cover, without occupying internal design space of the electronic device and being minimally affected by internal components. In this antenna structure, the fed line antenna can also couple more slot antennas of different sizes to cover even more frequency bands.

[0070] In conjunction with the tenth aspect, in some embodiments, the electronic device may include a floor, and the metal plate may be the floor. The floor may include: a printed circuit board (PCB) floor of the electronic device, or a metal frame of the electronic device.

[0071] In one aspect, this application provides an electronic device including an antenna device, which may include: a strip stub, a slot, etc.

[0072] The strip-shaped branch and the groove can be parallel to each other. The groove can be formed by cutting a groove in the floor. The first side of the groove is close to the strip-shaped branch, and the first side can have an opening. The opening can be located in the middle of the first side or off-center.

[0073] The strip branch may have a connection point B, at which a grounding branch can be connected. The grounding branch can be used to connect the first side of the slot and the strip branch at one end of the opening (end C). A feed point A can be provided on the strip branch, which can be used to connect a feed source. Specifically, the positive terminal of the feed source is connected to feed point A, and the negative terminal of the feed source is connected to the first side of the slot at the other end of the opening (end D).

[0074] The distance L8 between the feed point A and the connection point B on the strip stub can be less than 1 / 4 of the operating wavelength 5. The operating wavelength 5 refers to the operating wavelength of the strip stub, that is, the operating wavelength of the CM line antenna mode. In the eleventh aspect, the operating wavelength 5 can be referred to as the first wavelength.

[0075] The currents distributed on the strip-shaped branches are in the same direction; the currents distributed around the grooves on the metal plate are in the same direction.

[0076] As can be seen, the antenna design scheme provided in the eleventh aspect combines the CM line antenna and the CM slot antenna to obtain an antenna structure that combines the stub characteristics of both CM line antennas and CM slot antennas. Through a single-feed design, both CM line antenna modes and CM slot antenna modes can be excited, covering multiple frequency bands.

[0077] In a twelfth aspect, this application provides an electronic device including an antenna device, which may include: a strip conductor and a slot, wherein...

[0078] The slot can be formed on the strip conductor, and the direction of the slot can be perpendicular to the extension direction of the strip conductor; the slot at the middle position of the strip conductor can be perpendicular to the strip conductor. A feed can be connected at the middle position of the slot, with the positive terminal of the feed connected to one side of the slot and the negative terminal of the feed connected to the other side of the slot.

[0079] A strip conductor can have currents in the same direction distributed on both sides of the middle position of the slot. A strip conductor can also have currents in opposite directions distributed around the slot on both sides of the middle position of the slot.

[0080] As can be seen, the antenna design provided in the twelfth aspect can combine the stub features of DM line antenna and DM slot antenna by slotting on the strip conductor, and can excite two slot antenna modes through the feeding design: DM line antenna mode and DM slot antenna mode, so as to achieve coverage of multiple frequency bands while miniaturizing the antenna.

[0081] In a thirteenth aspect, this application provides an electronic device including an antenna assembly, which may include: a strip-shaped stub and a slot, wherein...

[0082] The strip-shaped spurs and the slots are parallel to each other; the slots are formed on the metal plate; a first spur is connected to the middle position of the strip-shaped spur, and the first spur is used to connect to the first side of the slot; a feed source is connected to the middle position of the slot, the positive terminal of the feed source is connected to the first side of the slot, and the negative terminal of the feed source is connected to the second side of the slot.

[0083] The strip-shaped branch has currents in opposite directions on both sides of the middle position of the branch; the metal plate has currents in opposite directions on both sides of the middle position of the groove surrounding the groove.

[0084] As can be seen, the antenna design scheme provided in Example 13, through an antenna structure that combines the stub features of both CM line antennas and DM slot antennas, combined with a single-feed power supply design, can excite CM line antenna mode and DM slot antenna mode, and can cover multiple frequency bands.

[0085] In a fourteenth aspect, this application provides an electronic device including an antenna assembly, which may include: a strip-shaped stub and a slot, wherein...

[0086] The strip-shaped branch and the groove can be parallel to each other. The groove can be formed by cutting a groove in the floor. The first side of the groove is close to the strip-shaped branch, and the first side can have an opening. The opening can be located in the middle of the first side or off-center.

[0087] The strip branch may have a first connection point and a second connection point. A first branch may be connected at the first connection point, and a second branch may be connected at the second connection point. The first branch may be used to connect the first side of the groove and the strip branch at one end of the opening (end C). The second branch may be used to connect the first side of the groove and the strip branch at the other end of the opening (end D).

[0088] A feed can be connected at the opening. At the opening, the positive terminal of the feed is connected to the first stub at one end of the opening (end C), and the negative terminal of the feed is connected to the second stub at the other end of the opening (end D).

[0089] Currents in the same direction are distributed on the strip-shaped branches; currents in the same direction are distributed around the groove on the metal plate.

[0090] As can be seen, the antenna design scheme provided in aspect fourteen combines a DM line antenna and a CM slot antenna to obtain an antenna structure that combines the stub characteristics of both DM line antennas and CM slot antennas. Through a single-feed design, both DM line antenna modes and CM slot antenna modes can be excited, covering multiple frequency bands. Attached Figure Description

[0091] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments of this application will be described below.

[0092] Figure 1 This is a schematic diagram of the electronic device on which the antenna design scheme provided in this application is based;

[0093] Figure 2A The CM line antenna provided in this application is shown;

[0094] Figure 2B A schematic diagram of the current and electric field distribution in the CM line antenna mode provided in this application is shown;

[0095] Figure 3A The DM line antenna provided in this application is shown;

[0096] Figure 3B The current and electric field distributions of the DM line antenna mode provided in this application are shown.

[0097] Figure 4A The CM slot antenna provided in this application is shown;

[0098] Figure 4B The distribution of current, electric field, and magnetic current in the CM slot antenna mode provided in this application is shown;

[0099] Figure 5A The DM slot antenna provided in this application is shown;

[0100] Figure 5B The distribution of current, electric field, and magnetic current in the DM slot antenna mode provided in this application is shown;

[0101] Figures 6A-6B The characteristic modes of a strip conductor are shown;

[0102] Figure 7A The antenna design provided in Implementation 1 is shown;

[0103] Figures 7B-7C The current distribution of the antenna structure provided in Implementation 1 is shown;

[0104] Figure 7D The implementation of the antenna design scheme provided in Example 1 in an actual complete device is shown;

[0105] Figure 7E It shows Figure 7D S11 simulation of the antenna shown;

[0106] Figure 8A An extended scheme for implementation 1 is shown;

[0107] Figures 8B-8E It shows Figure 8AThe current distribution of the antenna structure shown;

[0108] Figures 9A-9B The two feature patterns of the slotted metal plate are shown;

[0109] Figure 10A The antenna design provided in Implementation 2 is shown;

[0110] Figures 10B-10C The current distribution of the antenna structure provided in embodiment 2 is shown;

[0111] Figure 11A An extended scheme for implementation 1 is shown;

[0112] Figures 11B-11E It shows Figure 11A The current distribution of the antenna structure shown;

[0113] Figures 12A-12B The antenna design scheme provided by Implementation 3 is shown;

[0114] Figure 12C It shows Figures 12A-12B The antenna structure shown generates the resonant modes;

[0115] Figures 12D-12F It shows Figure 12C The current distribution of each resonance in the system;

[0116] Figures 13A-13B The antenna design provided by Implementation 4 is shown;

[0117] Figure 13C It shows Figures 13A-13B The resonant modes generated by the antenna structure shown;

[0118] Figures 13D-13E It shows Figure 13C The current distribution of each resonance in the system;

[0119] Figures 14A-14B The antenna design provided in Implementation 5 is shown;

[0120] Figure 14C It shows Figures 14A-14B The antenna structure shown generates the resonant modes;

[0121] Figures 14D-14E It shows Figure 14C The current distribution of each resonance in the system;

[0122] Figures 15A-15B The antenna design provided by Implementation 7 is shown.

[0123] Figure 15C It shows Figures 15A-15B The resonant modes generated by the antenna structure shown;

[0124] Figures 15D-15E It shows Figure 15C The current distribution of each resonance in the system;

[0125] Figure 16 The antenna design provided by Implementation 8 is shown;

[0126] Figure 17A The antenna design provided by Implementation Nine is shown;

[0127] Figures 17B-17C It shows Figure 17A The antenna structure shown has mode current and mode electric field;

[0128] Figure 18 The antenna design provided by Implementation 10 is shown;

[0129] Figure 19A The antenna design provided by Implementation 11 is shown;

[0130] Figure 19B It shows Figure 19A The resonant modes generated by the antenna structure shown;

[0131] Figures 19C-19D It shows Figure 19B The current distribution of some resonant elements;

[0132] Figure 19E It shows Figure 19B The electric field distribution of some resonances in the system;

[0133] Figure 20A The antenna design scheme provided by Implementation Twelve is shown;

[0134] Figures 20B-20C It shows Figure 20A The antenna structure shown has mode current and mode electric field;

[0135] Figure 20D An extended scheme for implementing twelve is shown;

[0136] Figure 20E It shows Figure 20D The resonant modes generated by the antenna structure shown;

[0137] Figures 20F-20H It shows Figure 20E The current distribution of each resonance in the system;

[0138] Figure 21A The antenna design scheme provided by Implementation Thirteen is shown;

[0139] Figure 21B It shows Figure 21AThe resonant modes generated by the antenna structure shown;

[0140] Figures 21C-21E It shows Figure 21B The current distribution of each resonance in the system;

[0141] Figure 22A The antenna design provided in Implementation Fourteen is shown;

[0142] Figure 22B It shows Figure 22A The resonant modes generated by the antenna structure shown;

[0143] Figures 22C-22E It shows Figure 22B The current distribution of each resonance in the system. Detailed Implementation

[0144] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0145] The technical solutions provided in this application are applicable to electronic devices employing one or more of the following communication technologies: Bluetooth (BT) communication technology, Global Positioning System (GPS) communication technology, Wireless Fidelity (Wi-Fi) communication technology, Global System for Mobile Communications (GSM) communication technology, Wideband Code Division Multiple Access (WCDMA) communication technology, Long Term Evolution (LTE) communication technology, 5G communication technology, Sub-6G communication technology, and other future communication technologies. In this application, the electronic device can be a mobile phone, tablet computer, personal digital assistant (PDA), etc.

[0146] Figure 1 An illustrative diagram shows the internal environment of the electronic device on which the antenna design provided in this application is based. For example... Figure 1 As shown, the electronic device 10 may include: a glass cover 13, a display screen 15, a printed circuit board 17, a housing 19, and a back cover 21.

[0147] The glass cover 13 can be set close to the display screen 15, and can be mainly used to protect the display screen 15 from dust.

[0148] The printed circuit board PCB 17 can be made of FR-4 dielectric material, Rogers dielectric material, or a hybrid dielectric material of Rogers and FR-4, etc. Here, FR-4 is a designation for a flame-retardant material grade, and Rogers dielectric material is a high-frequency board. A metal layer can be provided on the side of the printed circuit board PCB 17 near the housing 19. This metal layer can be formed by etching metal onto the surface of the PCB 17. This metal layer can be used to ground the electronic components carried on the printed circuit board PCB 17 to prevent electric shock to the user or damage to the equipment. This metal layer can be called a PCB ground plane. Besides the PCB ground plane, the electronic device 10 can also have other grounding surfaces, such as a metal frame.

[0149] The housing 19 primarily serves to support the entire device. The housing 19 may include an external conductive structure 11, which may be formed of a conductive material such as metal. The structure 11 may extend around the periphery of the electronic device 10 and the display screen 15, specifically surrounding the four sides of the display screen 15 to help secure it. In one implementation, the structure 11, made of metal, can be directly used as the metal frame of the electronic device 10, forming a metal frame appearance suitable for a metal ID. In another implementation, the outer surface of the structure 11 may also be provided with a non-metallic frame, such as a plastic frame, forming a non-metallic frame appearance suitable for a non-metallic ID.

[0150] The back cover 21 can be made of metal or non-conductive material, such as glass or plastic.

[0151] Figure 1 The electronic device 10 is shown only schematically, and the actual shape, size, and construction of these components are not subject to change. Figure 1 limited.

[0152] To provide users with a more comfortable visual experience, electronic device 10 can adopt a full-screen industrial design (ID). A full-screen design means a very high screen-to-body ratio (typically above 90%). The significantly reduced bezel width of a full-screen design necessitates a redesign of the internal components of electronic device 10, such as the front-facing camera, receiver, fingerprint reader, and antenna. Especially for antenna design, the reduced clearance area further compresses the antenna space. Since antenna size, bandwidth, and efficiency are interrelated and mutually influential, reducing antenna size (space) inevitably reduces the antenna's efficiency-bandwidth product.

[0153] The antenna design provided in this application enables miniaturized multimode antennas that can cover more frequency bands.

[0154] First, this application will cover four antenna modes.

[0155] 1. Common mode (CM) line antenna mode

[0156] like Figure 2A As shown, the line antenna 101 is connected to a feed at the middle position 103. The positive terminal of the feed is connected to the middle position 103 of the line antenna 101, and the negative terminal of the feed is connected to ground (e.g., the floor).

[0157] Figure 2B The current and electric field distribution of the wire antenna 101 are shown. Figure 2B As shown, the currents at the middle position 103 are opposite in direction and symmetrically distributed on both sides; the electric fields at the middle position 103 are distributed in the same direction. Figure 2B As shown, the current at feeder 102 exhibits a unidirectional distribution. Based on the unidirectional current distribution at feeder 102, Figure 2A The type of feed shown can be called a CM feed for a wire antenna. Figure 2B The line antenna mode shown can be called the CM line antenna mode. Figure 2B The current and electric field shown can be referred to as the current and electric field of the CM line antenna mode, respectively.

[0158] In the CM line antenna mode, the current and electric field are generated by the two horizontal stubs on either side of the middle position 103 of the line antenna 101, acting as a quarter-wavelength antenna. The current is strong at the middle position 103 of the line antenna 101 and weak at both ends. The electric field is weak at the middle position 103 of the line antenna 101 and strong at both ends.

[0159] 2. Differential mode (DM) line antenna mode

[0160] like Figure 3A As shown, the wire antenna 104 is connected to a feed at the middle position 106. The positive terminal of the feed is connected to one side of the middle position 106, and the negative terminal of the feed is connected to the other side of the middle position 106.

[0161] Figure 3B The current and electric field distribution of the wire antenna 104 are shown. Figure 3B As shown, the current in the same direction on both sides of the middle position 106 exhibits an anti-symmetrical distribution; the electric field in opposite directions on both sides of the middle position 106. Figure 3B As shown, the current at feeder 105 exhibits a reverse distribution. Based on the reverse current distribution at feeder 105, Figure 3A The type of feed shown can be called a line antenna DM feed. Figure 3B The line antenna mode shown can be called the DM line antenna mode. Figure 3B The current and electric field shown can be referred to as the current and electric field of the DM line antenna mode, respectively.

[0162] In DM line antenna mode, the current and electric field are generated by the entire line antenna 104 acting as a half-wavelength antenna. The current is strong at the middle position 106 of the line antenna 104 and weak at both ends. The electric field is weak at the middle position 106 of the line antenna 104 and strong at both ends.

[0163] 3. Common mode (CM) slot antenna mode

[0164] like Figure 4A As shown, the slot antenna 108 can be formed by slotting it in the floor. An opening 107 is provided on one side of the slot 109, specifically in the middle of that side. A feed can be connected to the opening 107. The positive terminal of the feed can be connected to one side of the opening 107, and the negative terminal of the feed can be connected to the other side of the opening 107.

[0165] Figure 4B The current, electric field, and magnetic current distribution of the slot antenna 108 are shown. Figure 4B As shown, the current is distributed in the same direction around the slot 109 on the conductor (such as a floor) surrounding the slot 109, the electric field is distributed in opposite directions on both sides of the middle position of the slot 109, and the magnetic current is distributed in opposite directions on both sides of the middle position of the slot 109. Figure 4B As shown, the electric field at opening 107 (i.e., the feed point) is in the same direction, and the magnetic current at opening 107 (i.e., the feed point) is also in the same direction. Based on the fact that the magnetic current at opening 107 (the feed point) is in the same direction... Figure 4A The type of feed shown can be called slot antenna CM feed. Figure 4B The slot antenna pattern shown can be called the CM slot antenna pattern. Figure 4B The electric field, current, and magnetic current shown can be distributed as the electric field, current, and magnetic current of the CM slot antenna mode.

[0166] In the CM slot antenna mode, the current and electric field are generated by the slot antenna elements on both sides of the middle position of the slot antenna 108, which act as a quarter-wavelength antenna. The current is weak at the middle position of the slot antenna 108 and strong at both ends. The electric field is strong at the middle position of the slot antenna 108 and weak at both ends.

[0167] 4. Differential mode (DM) slot antenna mode

[0168] like Figure 5A As shown, the slot antenna 110 can be formed by slotting it in the floor. A feed is connected at the middle position 112 of the slot antenna 110. The middle position of one side of the slot 114 is connected to the positive terminal of the feed, and the middle position of the other side of the slot 114 is connected to the negative terminal of the feed.

[0169] Figure 5B The current, electric field, and magnetic current distributions of the slot antenna 110 are shown. Figure 5B As shown, on the conductor (such as a ground plane) surrounding slot 114, the current is distributed around slot 114, and the current is distributed in opposite directions on both sides of the middle position 112 of slot 114. The electric field is distributed in opposite directions on both sides of the middle position 112, and the magnetic current is distributed in the same direction on both sides of the middle position 112. The magnetic current at the feed is distributed in opposite directions (not shown). Based on the opposite magnetic current distribution at the feed, Figure 5A The type of feed shown can be called slot antenna DM feed. Figure 5B The slot antenna pattern shown can be called the DM slot antenna pattern. Figure 5B The electric field, current, and magnetic current shown can be distributed as the electric field, current, and magnetic current of the DM slot antenna mode.

[0170] The current and electric field in the DM slot antenna mode are generated by the entire slot antenna 110 acting as a half-wavelength antenna. The current is weak at the middle of the slot antenna 110 and strong at both ends. The electric field is strong at the middle of the slot antenna 110 and weak at both ends.

[0171] This application provides the following antenna design scheme, which integrates multiple antenna modes from the above four antenna modes to cover more frequency bands and achieve antenna miniaturization.

[0172] Option 1

[0173] In Option 1, a specific-shaped conductor is fed to generate two of the four antenna modes. This allows for the generation of two antenna modes from a single conductor of a specific shape, achieving multi-band coverage while miniaturizing the antenna.

[0174] Scheme 1 is based on the principle that, without considering the power supply, a conductor of arbitrary shape can have multiple characteristic modes. By designing the power supply, one or more characteristic modes can be enhanced, thereby selecting the desired characteristic mode.

[0175] Several embodiments of Scheme 1 will be described in detail below with reference to the accompanying drawings.

[0176] Example 1

[0177] In Example 1, for a strip conductor, two desired characteristic modes can be excited through the power supply design. These two desired characteristic modes are: Figures 2A-2B The CM line antenna mode shown Figures 3A-3BThe DM line antenna mode is shown. That is to say, by designing the feed of the strip conductor, the CM line antenna mode and the DM line antenna mode can be selected from the various characteristic modes of the strip conductor.

[0178] Figure 6A and Figure 6B Two characteristic modes of the strip conductor 111 are shown (without considering the feed). Among them, Figure 6A The characteristic mode shown is the CM line antenna mode. The current on the strip conductor 111 is the CM line antenna mode current, that is, the current on the strip conductor 111 exhibits an inverse distribution. Figure 6B The characteristic mode shown is the DM line antenna mode. The current on the strip conductor 111 is the DM line antenna mode current, that is, the current on the strip conductor 111 is distributed in the same direction.

[0179] Figure 7A The antenna design provided in Implementation 1 is shown. For example... Figure 7A As shown, the wire antenna provided in Embodiment 1 may include: a strip conductor 111, a feed point 113, and a ground point 115. Wherein:

[0180] Feed point 113 can be located at the middle position of strip conductor 111. Feed point 113 can be connected to a feed source. The positive terminal of the feed source can be connected to feed point 113, and the negative terminal of the feed source can be connected to ground (such as a floor).

[0181] On the strip conductor 111, a grounding point 115 can be located near the feed point 113. Grounding point 115 can be connected to a grounding branch 117. Grounding branch 117 can be used to connect to ground (such as a floor). Here, "nearby" can mean that the length between the feed point 113 and the grounding terminal A of the grounding branch 117 is less than 1 / 4 of the operating wavelength 1. That is, the distance L between the feed point 113 and the grounding point 115... BC The length L of the grounding branch 117 CA The sum is less than 1 / 4 of the operating wavelength 1. Operating wavelength 1 refers to... Figure 7A The operating wavelength of the CM line antenna mode shown is described below. The calculation method for operating wavelength 1 will be introduced later, but will not be elaborated here.

[0182] The feed point 113 is positioned at the middle of the strip conductor 111, ensuring a strong current at the middle and a weak current at both ends. This achieves a current distribution consistent with both the CM and DM line antenna modes, effectively coupling the two characteristic modes of the strip conductor 111: the CM and DM line antenna modes. In other words, the design of the feed point 113 can excite... Figure 7A The line antenna shown generates CM line antenna mode and DM line antenna mode.

[0183] Figure 7B and Figure 7C Two currents with different frequencies distributed on the strip conductor 111 are shown: current 116 and current 118. Current 116 has opposite directions on both sides of the feed point 113, while current 118 has the same direction on both sides of the feed point 113. Current 116 is the current in CM line antenna mode, and current 118 is the current in DM line antenna mode. Current 116 is the 1 / 4 wavelength mode current generated by the horizontal stubs 111-A and 111-B on both sides of the feed point 113 of the strip conductor 111, and current 118 is the 1 / 2 wavelength mode current generated by the entire strip conductor 111. Because there are two currents with different frequencies on the strip conductor 111: current 116 and current 118, two different resonant frequencies can be generated on the strip conductor 111. Figure 7A The wire antenna shown may have at least two different operating frequency bands. In Embodiment 1, current 116 can be referred to as the first current, and current 118 can be referred to as the second current.

[0184] The aforementioned operating wavelength 1 (i.e. Figure 7A The operating wavelength of the CM line antenna mode shown can be calculated based on the frequency f1 of the current 116, since the current 116 is the current in the CM line antenna mode. Specifically, the operating wavelength 1 of the radiated signal in air can be calculated as follows: wavelength = speed of light / f1. The operating wavelength 1 of the radiated signal in the medium can be calculated as follows: Wherein, ε is the relative permittivity of the medium. In Example 1, the aforementioned operating wavelength 1 can be referred to as the first wavelength.

[0185] Figure 7D The implementation of the antenna design scheme provided in Embodiment 1 in an actual complete device is shown. For example... Figure 7D As shown, the strip conductor 111 can be a portion of the metal frame of an electronic device, such as a metal frame located at the top or bottom of the electronic device. The strip conductor 111 can be fed at its midpoint. A grounding stub 117 can connect the metal frame to the ground plane, and can be, for example, a metal spring attached to the ground plane connecting the strip conductor 111. The grounding stub 117 can be located near the feed point 113. Figure 7E It shows Figure 7D The S11 simulation of the antenna shown is as follows. Figure 7EAs shown, the antenna can actually generate three resonances: resonance "1" (LB1), resonance "2" (LB2), and resonance "3" (LB2). Resonance "1" is around 0.7 GHz, resonance "2" is around 0.85 GHz, and resonance "3" is around 1.05 GHz. Resonance "2" can be generated by the half-wavelength mode of the strip conductor 111, which is the resonance of the DM line antenna mode. Resonance "3" can be generated by the quarter-wavelength mode of the strip conductor 111, which is the resonance of the CM line antenna mode. Resonance "1" can be generated by exciting the ground plane with the quarter-wavelength mode of the strip conductor 111, and a current 120 is distributed on the ground plane. The frequency of current 120 can be different from the frequencies of currents 116 and 118, specifically lower than the frequencies of currents 116 and 118. In Embodiment 1, current 120 can be referred to as the third current.

[0186] As can be seen, the antenna design provided in Example 1 can use a strip conductor to excite two line antenna modes: CM line antenna mode and DM line antenna mode, achieving coverage of multiple frequency bands while miniaturizing the antenna.

[0187] Extended scheme of Example 1

[0188] like Figure 8A As shown, the feed point 113 can be offset from the center of the strip conductor 111 to cover more frequency bands. That is to say, in Figure 8A In the antenna structure shown, the distance L1 from the feed point 113 to one end of the strip conductor 111 is not equal to the distance L2 from the feed point 113 to the other end of the strip conductor 111. Using the feed point 113 as the dividing line, the strip conductor 111 can be divided into: long stubs and short stubs. The long stub is... Figure 8A A horizontal branch of length L2, and a short branch. Figure 8A A horizontal branch of length L1. Figure 8A In the antenna structure shown, it is not necessary to set a grounding stub 117 near the feed point 113, that is, the grounding stub 117 can be removed.

[0189] and Figure 7A The difference in the embodiments is that, Figure 8A In the antenna structure shown, multiple currents with different frequencies can exist on the strip conductor 111: current 20, current 21, current 22, and current 23, which can be respectively as follows: Figures 8B-8EAs shown. On the strip conductor 111, currents 20, 22, and 23 have opposite directions on both sides of the feed point 113. Current 21 has the same direction throughout the strip conductor 111. Current 20 is a 1 / 4 wavelength mode current generated by the long stub. Current 21 is a 1 / 2 wavelength mode current generated throughout the strip conductor 111. Current 22 is a 1 / 4 wavelength mode current generated by the short stub. Current 23 is a 3 / 4 wavelength mode current generated by the long stub. Because more currents with different frequencies can exist on the strip conductor 111, therefore, Figure 8A The antenna structure shown achieves antenna miniaturization while covering more operating frequency bands.

[0190] Example 2

[0191] In Example 2, for a specific slotted conductor, two desired characteristic modes can be excited through the power supply design. These two desired characteristic modes are: Figures 4A-4B The CM slot antenna pattern shown Figures 5A-5B The DM slot antenna mode is shown. That is to say, by designing the feed for a specific slotted conductor, the CM slot antenna mode and the DM slot antenna mode can be selected from the various characteristic modes of the specific slotted conductor.

[0192] Figure 9A and Figure 9B Two characteristic modes of a slotted metal plate are shown (excluding power supply). This slotted metal plate is the specific slotted conductor selected in Embodiment 2, and can be, for example, a floor. The slotted metal plate has a slot 31, which can be achieved by slotting in the floor. An opening 33 is provided on one side of the slot 31, specifically located in the middle of that side. The opening 33 connects the slot 31 to the free space outside the slot 31. Figure 9A The characteristic mode shown is the CM slot antenna mode. Figure 9A The current and electric field shown are those of the CM slot antenna mode. Figure 9B The characteristic mode shown is the DM slot antenna mode. Figure 9B The current and electric field shown are those for the DM slot antenna mode. Besides the CM slot antenna mode and the DM slot antenna mode, Figures 9A-9B The slotted conductor shown may also have other characteristic modes, which will not be elaborated here.

[0193] Figure 10A The antenna design provided in Implementation 2 is shown. For example... Figure 10A As shown, the slot antenna provided in Embodiment 2 may include: a metal plate and a slot 31. Wherein:

[0194] The metal plate can be a floor. The groove 31 can be achieved by slotting in the metal plate (e.g., a floor). An opening 33 can be provided on one side of the groove 31, specifically located in the middle of that side. The groove 31 can be filled with materials such as polymers, glass, ceramics, or combinations thereof. The opening 33 can also be filled with materials such as polymers, glass, ceramics, or combinations thereof.

[0195] A feed source can be connected at position 35 of slot 31. At position 35, the positive terminal of the feed source is connected to one side of slot 31, and the negative terminal of the feed source is connected to the other side of slot 31. In embodiment 2, the side connected to the positive terminal of the feed source can be referred to as the first side of slot 31, and the side connected to the negative terminal of the feed source can be referred to as the second side of slot 31. Position 35 can be located near opening 33. Here, "nearby" can mean that the distance L3 between the feed position 35 and opening 33 is less than 1 / 4 of the operating wavelength 2. The operating wavelength 2 is... Figure 10A The operating wavelength of the CM slot antenna mode shown is described later; the calculation method for operating wavelength 2 will be explained later and will not be elaborated here. Optionally, the distance L3 can be greater than 1 / 8 of the operating wavelength 2 to facilitate implementation in the actual device. Feeding near the opening 33 results in a weak current near the middle of slot 31 and a strong current at both ends of slot 31. This achieves a current distribution consistent with both the 1 / 4 wavelength mode of the CM slot antenna and the 1 / 2 wavelength mode of the DM slot antenna, thus ensuring good coupling. Figure 10A The slotted metal plate shown has the following characteristic modes: CM slot antenna mode and DM slot antenna mode.

[0196] The design of the feed position 35 can excite Figure 10A The slot antenna shown generates CM slot antenna mode and DM slot antenna mode. For example... Figure 10B and Figure 10C As shown, Figure 10A The slot antenna shown can have two currents with different frequencies surrounding slot 31: current 36 and current 38. In embodiment 2, current 36 and current 38 can be referred to as the first current and the second current, respectively. Current 36 is distributed in the same direction around slot 31. Current 38 is distributed around slot 31, but in opposite directions on both sides of opening 33. Figure 10A The slot antenna shown can have electric fields of different frequencies: electric field 32 and electric field 34. On slot 31, electric field 32 is distributed in opposite directions on both sides of opening 33, and has the same frequency as current 36; this is the electric field of the CM slot antenna mode. Electric field 34 is distributed in the same direction on slot 31, and has the same frequency as current 38; this is the electric field of the DM slot antenna mode. The frequency f3 of electric field 34 is higher than the frequency f4 of electric field 32. Because... Figure 10A The slot antenna shown has two electric fields with different frequencies: electric field 32 and electric field 34. Therefore, the slot antenna can have at least two different operating frequency bands.

[0197] The aforementioned operating wavelength 2 (i.e., the operating wavelength of the CM slot antenna mode) can be calculated based on the frequency f4 of the current 36 and the electric field 32, since the electric field 32 is the electric field of the CM slot antenna mode. Specifically, the operating wavelength 2 of the radiated signal in air can be calculated as follows: Wavelength = Speed ​​of light / f4. The operating wavelength 2 of the radiated signal in the medium can be calculated as follows: Wherein, ε is the relative permittivity of the medium. In Example 2, the aforementioned operating wavelength 2 can be referred to as the first wavelength.

[0198] As can be seen, the antenna design provided in Example 2 can use a slotted conductor to excite two slotted antenna modes: CM slotted antenna mode and DM slotted antenna mode, achieving coverage of multiple frequency bands while miniaturizing the antenna.

[0199] Extended scheme of Example 2

[0200] like Figure 11A As shown, the position of the opening 33 of slot 31 can be offset from the center of the opening side of slot 31 to cover more frequency bands. That is to say, in Figure 11A In the slot antenna structure shown, the distance L4 from opening 33 to one end of slot 31 is not equal to the distance L5 from opening 33 to the other end of slot 31. The position of opening 33 is used as the dividing line. Figure 11A The slot antenna shown can be divided into: long slot and short slot. The long slot is... Figure 11A A section of the tank with a length of L4, and a short section of the tank. Figure 11A A section of the trough with a length of L5.

[0201] exist Figure 11A In the slot antenna structure shown, the feed position 35 can be designed near the opening 33. The meaning of "nearby" has been explained in the aforementioned Embodiment 2 and will not be repeated here. Figure 10A The difference in the embodiments is that, Figure 11A The trough shown can contain more electric fields of different frequencies: electric field 50, electric field 51, electric field 52, and electric field 53, which can be respectively as follows: Figures 11B-11E As shown. Electric fields 50, 51, 52, and 53 are distributed in opposite directions on slot 31. Electric field 51 is distributed in the same direction on the horizontal stub 13. Electric field 50 is the 1 / 4 wavelength mode electric field generated by the long slot. Electric field 51 is the 1 / 2 wavelength mode electric field generated by the entire slot antenna. Electric field 52 is the 1 / 4 wavelength mode electric field generated by the short slot. Electric field 53 is the 1 / 4 wavelength mode electric field generated by the long slot. Due to... Figure 11A The slot antenna shown can have electric fields of more different frequencies, therefore, Figure 11A The antenna structure shown achieves antenna miniaturization while covering more operating frequency bands.

[0202] Option 2

[0203] In Scheme 2, a coupled antenna structure is formed by coupling a slot antenna with a fed slot antenna, or vice versa, to combine the wire antenna mode and slot antenna mode from the four antenna modes mentioned above. This allows two antenna modes to be excited by feeding a single antenna, achieving multi-band coverage while miniaturizing the antenna.

[0204] Several embodiments of Scheme 2 will be described in detail below with reference to the accompanying drawings.

[0205] Example 3

[0206] In Example 3, the feed antenna can be Figure 5A The DM slot antenna shown can be a coupled antenna. Figure 3A The DM line antenna shown can be excited into DM slot antenna mode and DM line antenna mode.

[0207] Figures 12A-12B The antenna design scheme provided in Implementation 3 is shown. Among them, Figure 12A A three-dimensional schematic diagram of the antenna design is shown. Figure 12B A top-view schematic diagram of the antenna design is shown. Figures 12A-12B As shown, the antenna structure provided in Embodiment 3 may include: at least one wire antenna 61 and a slot antenna 63. Wherein:

[0208] The wire antenna 61 can be Figure 3A The DM line antenna shown is an example. The line antenna 61 can be a floating antenna, which can be disposed on the inner surface of the back cover 21, the outer surface of the back cover 21, or embedded in the back cover 21. For example, the line antenna 61 can be a metal strip pasted to the inner surface of the back cover 21, or it can be printed on the inner surface of the back cover 21 using conductive silver paste.

[0209] Slot antenna 63 can be Figure 5A The DM slot antenna shown is described. The slot antenna 63 may include a metal plate and a slot 60. The slot antenna 63 can be formed by slotting a metal plate (such as PCB 17). A feed source can be connected at the middle position 65 of the slot antenna 63; that is, the feed position 65 of the slot antenna 63 can be located in its middle position. Specifically, the positive terminal of the feed source can be connected to the middle position of one side of the slot 60, and the negative terminal of the feed source can be connected to the middle position of the other side of the slot 60. The slot 60 can be filled with materials such as polymers, glass, ceramics, or combinations thereof.

[0210] The linear antenna 61 can be parallel to the plane where the slot antenna 63 is located and perpendicular to the slot 60 of the slot antenna 63. This plane can be called the slotted surface, i.e., the plane where the aforementioned metal plate is located. The projection of the linear antenna 61 onto the slotted surface and the slot 60 of the slot antenna 63 can intersect at the midpoint of this projection. The distance 67 between the intersection of the projection of the linear antenna 61 onto the slotted surface and the slot 60 and the feed position 65 of the slot antenna 63 can be less than 1 / 2 of the operating wavelength 3. The operating wavelength 3 refers to the operating wavelength of the slot antenna 63. In embodiment 3, the operating wavelength 3 can be referred to as the first wavelength.

[0211] The coupling distance between the line antenna 61 and the fed slot antenna 63 can be the distance between the planes where the line antenna 61 and the slot antenna 63 are located. This distance is less than a first distance, such as less than 1 mm. It should be understood that the smaller the coupling distance, the stronger the coupling effect. This application does not limit the specific value of this coupling distance, as long as it satisfies the requirement that the slot antenna 63 can couple the suspended line antenna 61.

[0212] It should be understood that the planes in which the line antenna 61 and the fed slot antenna 63 lie may not be parallel. When they are not parallel, the fed slot antenna 63 can still couple to the suspended line antenna 61, but the coupling effect may be weaker than when they are parallel.

[0213] The following explanation Figures 12A-12B The antenna structure shown in the example can produce resonant modes.

[0214] Please see Figure 12C , Figure 12C The "1", "2", and "3" represent different resonances. This coupled antenna structure can generate resonance "1" near 1.6 GHz, resonance "2" near 2.5 GHz, and resonance "3" near 3.9 GHz. Specifically: resonance "1" can be generated by the half-wavelength mode of the slot antenna 63; resonance "2" can be generated by the half-wavelength mode of the longer wire antenna 61; and resonance "3" can be generated by the half-wavelength mode of the shorter wire antenna 61.

[0215] Figures 12D-12F The current distribution of resonant "1", "2", and "3" is illustrated exemplarily. Figure 12D As shown, the resonant current 71 of the "1" is distributed in opposite directions around the slot 60 on the slot antenna 63, specifically symmetrically opposite on both sides of the feed point 65. The current is weak near the middle of the slot 60 and strong near the ends of the slot 60. In embodiment 3, the current 71 around the slot 63 can be referred to as the first current. Figure 12E As shown, the current 72 of the resonant "2" is distributed in the same direction on the longer linear antenna 61, being strong in the middle of the antenna 61 and weak at both ends. Figure 12FAs indicated, the current 73 of the resonance "3" is distributed in the same direction on the shorter linear antenna 61, being strong in the middle of the linear antenna 61 and weak at both ends of the linear antenna 61. In Embodiment 3, the current on the linear antenna 61 can be referred to as the second current.

[0216] The wavelength mode of resonance "1" generated by the slot antenna 63 is not limited; resonance "1" can also be generated by the slot antenna 63 in a one-wavelength mode, a three-half-wavelength mode, etc. The wavelength mode of resonance "2" generated by the longer wire antenna 61 is not limited; resonance "2" can also be generated by the longer wire antenna 61 in a three-half-wavelength mode, a five-half-wavelength mode, etc. The wavelength mode of resonance "3" generated by the shorter wire antenna 61 is not limited; resonance "3" can also be generated by the shorter wire antenna 61 in a three-half-wavelength mode, a five-half-wavelength mode, etc.

[0217] Figures 12A-12B The exemplary antenna structure shown includes two wire antennas 61 of different lengths. However, this structure can be more than one wire antenna 61. That is, the fed slot antenna 63 can simultaneously couple two or more wire antennas 61 to cover more frequency bands. Alternatively, the antenna structure can have only one wire antenna 61. The projections of the two or more wire antennas 61 of different lengths onto the slotted surface can be parallel to each other. Optionally, the two or more wire antennas 61 can lie in the same plane, which can be parallel to the slotted surface. This plane can be referred to as the first plane. Because of their different lengths, the frequencies of the second currents distributed on the two or more wire antennas 61 are also different.

[0218] Apart from Figure 12C The 1.6GHz band, 2.5GHz band, and 3.9GHz band shown are... Figures 12A-12B The exemplary antenna structure can also generate resonance in other frequency bands, which can be achieved by adjusting the size of each antenna radiator (such as slot antenna 63 and line antenna 61) in the antenna structure.

[0219] In this application, a frequency band refers to a frequency range. For example, a 2.5GHz band can refer to the frequency range of 2.4835GHz to 2.5835GHz, that is, the frequency range around 2.5GHz.

[0220] As can be seen, the antenna design provided in Embodiment 3 allows the fed slot antenna 63 to operate in DM slot antenna mode while simultaneously coupling one or more line antennas 61 to operate in DM line antenna mode, thus covering multiple frequency bands. Furthermore, the line antenna 61 can be designed as a floating antenna mounted on the rear cover, without occupying internal design space in the electronic device and being minimally affected by internal components.

[0221] Example 4

[0222] Similar to Embodiment 3, the antenna structure provided in Embodiment 4 can also excite DM line antenna mode and DM slot antenna mode. Unlike Embodiment 3, the feed antenna in Embodiment 4 can be... Figure 3A The DM line antenna shown can be a coupled antenna. Figure 5A The DM slot antenna shown.

[0223] Figures 13A-13B The antenna design scheme provided in Implementation 4 is shown. Among them, Figure 13A A three-dimensional schematic diagram of the antenna design is shown. Figure 13B A top-view schematic diagram of the antenna design is shown. Figures 12A-12B As shown, the antenna structure provided in Embodiment 4 may include: a line antenna 81 and a slot antenna 83. Wherein:

[0224] The wire antenna 81 can be Figure 3A The DM line antenna shown is an example. A feed source can be connected to the middle position of the line antenna 81; that is, the feed position 85 of the line antenna 81 can be the middle position of the line antenna 81. Specifically, the positive terminal of the feed source can be connected to one side of this middle position, and the negative terminal of the feed source can be connected to the other side of this middle position. The line antenna 81 can be a floating antenna, and can be disposed on the inner surface of the rear cover 21, the outer surface of the rear cover 21, or embedded in the rear cover 21.

[0225] Slot antenna 83 can be Figure 5A The DM slot antenna shown is described. The slot antenna 83 may include a metal plate and a slot 80. The slot antenna 83 can be formed by slotting a groove in the metal plate (such as a PCB floor). The slot 80 can be filled with materials such as polymers, glass, ceramics, or combinations thereof.

[0226] The linear antenna 81 can be parallel to the plane where the slot antenna 83 is located and perpendicular to the slot 80 of the slot antenna 83. This plane can be called the slotted surface, i.e., the plane where the aforementioned metal plate is located. The projection of the linear antenna 81 onto the slotted surface and the slot 80 of the slot antenna 83 can intersect at the middle position of this projection. The distance L6 from the intersection A of the projection of the linear antenna 81 onto the slotted surface and the slot 80 to the middle position B of the slot antenna 83 can be greater than 1 / 8 of the operating wavelength 4 and less than 1 / 2 of the operating wavelength 4. The operating wavelength 4 refers to the operating wavelength of the slot antenna 83. In embodiment 4, the aforementioned operating wavelength 4 can be called the first wavelength.

[0227] For a description of the coupling spacing between the fed linear antenna 81 and the slot antenna 83, please refer to Embodiment 3, which will not be repeated here.

[0228] The following explanation Figures 13A-13B The antenna structure shown in the example can produce resonant modes.

[0229] Please see Figure 13C , Figure 13C The "1" and "2" represent different resonances. This coupled antenna structure can generate resonance "1" near 1.5 GHz and resonance "2" near 2.1 GHz. Specifically, resonance "1" can be generated by the half-wavelength mode of the wire antenna 81. Resonance "2" can be generated by the half-wavelength mode of the slot antenna 83.

[0230] Figures 13D-13E The current distribution of resonant "1" and "2" is illustrated exemplarily. Figure 13D As shown, the resonant current 91 of the "1" is distributed in the same direction on the line antenna 81, specifically stronger in the middle of the line antenna 81 and weaker at both ends. Figure 13E As shown, the current 93 of the resonance "2" is distributed in opposite directions around the slot 80 on the slot antenna 83. Specifically, it is distributed in opposite directions on both sides of position B. The current is weak near position B and strong near both ends of the slot 80.

[0231] Apart from Figure 13C The 1.5GHz and 2.1GHz frequency bands shown are... Figures 13A-13B The exemplary antenna structure can also generate resonance in other frequency bands, which can be achieved by adjusting the size of each antenna radiator (such as slot antenna 83 and wire antenna 81) in the antenna structure.

[0232] As can be seen, the antenna design provided in Embodiment 4 allows the fed line antenna 81 to operate in DM line antenna mode while simultaneously coupling the slot antenna 83 to operate in DM slot antenna mode, thus covering multiple frequency bands. The line antenna 81 can be designed as a floating antenna mounted on the rear cover, without occupying internal design space of the electronic device and being minimally affected by internal components. In this antenna structure, the fed line antenna 81 can also couple more slot antennas 83 of different sizes to cover more frequency bands.

[0233] Example 5

[0234] In Example 5, the feed antenna can be Figure 2A The CM line antenna shown can be a coupled antenna. Figure 4A The CM slot antenna shown can be excited to produce CM line antenna mode and CM slot antenna mode.

[0235] Figure 14A The antenna design provided in Implementation 5 is shown. For example... Figure 14A As shown, the antenna structure provided in Embodiment 5 may include: a line antenna 121 and a slot antenna 123. Wherein:

[0236] Antenna 121 can be Figure 2AThe CM line antenna is shown. The feed position 122 of the line antenna 121 can be set at the middle position of the line antenna 121. The feed position 122 can be connected to the feed source 125. The positive terminal of the feed source 125 can be connected to the feed position 122, and the negative terminal of the feed source 125 can be connected to ground (such as a floor).

[0237] Slot antenna 123 can be Figure 4A The CM slot antenna 123 is shown. The slot antenna 123 can be formed by slotting a metal plate. The slot antenna 123 may include a slot 127. An opening 129 may be formed on one side 126 of the slot 127 near the line antenna 121, specifically in the middle of that side. The slot 127 can be filled with materials such as polymers, glass, ceramics, or combinations thereof. The opening 129 can also be filled with materials such as polymers, glass, ceramics, or combinations thereof.

[0238] The fed wire antenna 121 and slot antenna 123 can be positioned close to and perpendicular to each other at their midpoint. Specifically, the wire antenna 121 can be positioned perpendicular to the plane on one side 126 of the slot antenna 123. This plane can be called the slotted surface, i.e., the plane where the aforementioned metal plate is located. The plane on which the slot antenna 123 is located can be perpendicular to the wire antenna 121 at its midpoint. The positive terminal of the feed connected to the wire antenna 121 can be located on one side of the opening 129 of the slot antenna 123, and the negative terminal of the feed connected to the wire antenna 121 can be located on the other side of the opening 129 of the slot antenna 123.

[0239] The coupling spacing between the line antenna 121 and the slot antenna 123 can be the distance between the plane where the slot antenna 123 is located and the line antenna 121. This distance can be less than a specific value, such as 1 mm. It should be understood that the smaller the coupling spacing, the stronger the coupling effect. This application does not limit the specific value of the coupling spacing, as long as the fed line antenna 121 can couple with the slot antenna 123.

[0240] The following explanation Figure 14A The antenna structure shown in the example can produce resonant modes.

[0241] Please see Figure 14C , Figure 14C The "1" and "2" represent different resonances. This coupled antenna structure can generate resonance "1" near 1.3 GHz and resonance "2" near 2.0 GHz. Specifically, resonance "1" can be generated by the quarter-wavelength mode of slot antenna 123. Resonance "2" can be generated by the quarter-wavelength mode of wire antenna 121.

[0242] Figures 14D-14E The current distribution of resonant "1" and "2" is illustrated exemplarily. Figure 14DAs shown, the resonant current 121 of the "1" is distributed in the same direction around the slot 127 on the slot antenna 123. Specifically, the current is weak near the middle of the slot 127 and strong near the two ends of the slot 127. Figure 14E As shown, the current 123 of the resonant "2" is distributed in opposite directions on the line antenna 121, specifically symmetrically distributed in opposite directions on both sides of the feed point 125, strong in the middle of the line antenna 121, and weak at both ends of the line antenna 121.

[0243] The wavelength mode of the resonant "1" generated by the slot antenna 123 is not limited; the resonant "1" can also be generated by the three-quarter wavelength mode of the slot antenna 123, etc. The wavelength mode of the resonant "2" generated by the wire antenna 121 is not limited; the resonant "2" can also be generated by the three-quarter wavelength mode of the wire antenna 121, etc.

[0244] Apart from Figure 14C The 1.3GHz and 2.0GHz frequency bands shown are... Figure 14A The exemplary antenna structure can also generate resonance in other frequency bands, which can be achieved by adjusting the size of each antenna radiator (such as slot antenna 123 and wire antenna 121) in the antenna structure.

[0245] As can be seen, the antenna design provided in Embodiment 5 allows the fed line antenna 121 to operate in CM line antenna mode while simultaneously coupling the slot antenna 123 to operate in CM slot antenna mode, thus covering multiple frequency bands. In this antenna structure, the fed line antenna 121 can also couple more slot antennas 123 of different sizes to cover even more frequency bands.

[0246] Example 6

[0247] Similar to Embodiment 5, the antenna structure provided in Embodiment 6 can also excite CM line antenna mode and CM slot antenna mode. Unlike Embodiment 5, the feed antenna in Embodiment 6 can be... Figure 4A The CM slot antenna shown can be a coupled antenna. Figure 2A The CM line antenna shown.

[0248] In the antenna structure provided in Embodiment 6, the positional relationship between the CM line antenna and the CM slot antenna can be referenced to the positional relationship between the line antenna 121 and the slot antenna 123 in Embodiment 5, and will not be repeated here. A feed can be connected to the opening 129 of the CM slot antenna. The positive terminal of the feed can be connected to one side of the opening 129, and the negative terminal of the feed can be connected to the other side of the opening 129.

[0249] Example 7

[0250] In Example 7, the feed antenna can be Figure 2A The CM line antenna shown can be a coupled antenna. Figure 5AThe DM slot antenna shown can be excited to produce CM line antenna mode and DM slot antenna mode.

[0251] Figures 15A-15B The antenna design provided in Implementation 7 is shown. For example... Figure 15A As shown, the antenna structure provided in Embodiment 7 may include: a line antenna 141 and a slot antenna 143. Figure 15A The centerline antenna 141 and the slot antenna 143 can be coplanar. Figure 15B The plane of the centerline antenna 141 and the plane of the slot antenna 143 can be perpendicular to each other. Wherein:

[0252] The wire antenna 141 can be Figure 2A The CM line antenna is shown. The feed position 142 of the line antenna 141 can be set at the middle position of the line antenna 141. The feed position 142 can be connected to a feed source. The positive terminal of the feed source can be connected to the feed position 142, and the negative terminal of the feed source can be connected to ground (such as a floor).

[0253] Slot antenna 143 can be Figure 5A The DM slot antenna shown is an example. The slot antenna 143 can be formed by slotting a metal plate. The slot antenna 143 may include a slot 147. The slot 147 can be filled with materials such as polymers, glass, ceramics, or combinations thereof.

[0254] The fed wire antenna 141 and slot antenna 143 can be close to each other and parallel to each other. Specifically, the wire antenna 141 can be parallel to the slot antenna 143. The line connecting the middle position of the wire antenna 141 and the middle position of the slot antenna 143 can be perpendicular to both the wire antenna 141 and the slot antenna 143. Alternatively, the wire antenna 141 and the slot 143 can be said to share a common perpendicular plane.

[0255] The coupling spacing between the line antenna 141 and the slot antenna 143 can be the distance between the line antenna 141 and the slot antenna 143. This distance can be less than a specific value, such as 5 mm. It should be understood that the smaller the coupling spacing, the stronger the coupling effect. This application does not limit the specific value of the coupling spacing, as long as the fed line antenna 141 can couple with the slot antenna 143.

[0256] The following explanation Figures 15A-15B The antenna structure shown in the example can produce resonant modes.

[0257] Please see Figure 15C , Figure 15C The "1" and "2" represent different resonances. This coupled antenna structure can generate resonance "1" near 1.51 GHz and resonance "2" near 1.95 GHz. Specifically, resonance "1" can be generated by the quarter-wavelength mode of the wire antenna 141. Resonance "2" can be generated by the half-wavelength mode of the slot antenna 143.

[0258] Figures 15D-15E The current distribution of resonant "1" and "2" is illustrated exemplarily. Figure 15D As shown, the resonant current 151 is distributed between the wire antenna 141 and the ground plane, meaning the wire antenna 141 also excites the ground plane to radiate. The current 151 is distributed in an anti-symmetrical manner on the wire antenna 141, with a stronger current in the middle and a weaker current at both ends. Figure 15E As shown, the current 153 of the resonance "2" is distributed in opposite directions around the slot 147 on the slot antenna 143. Specifically, it is distributed symmetrically in opposite directions on both sides of the middle position of the slot 147. The current is weak near the middle of the slot 147 and strong near the two ends of the slot 147.

[0259] The wavelength mode of the resonant "1" generated by the linear antenna 141 is not limited; the resonant "1" can also be generated by the three-quarter wavelength mode of the linear antenna 141, etc. The wavelength mode of the resonant "2" generated by the slot antenna 143 is not limited; the resonant "2" can also be generated by the one-wavelength mode, three-half wavelength mode, etc. of the slot antenna 143.

[0260] Apart from Figure 15C The 1.51GHz and 1.95GHz frequency bands shown are... Figures 15A-15B The exemplary antenna structure can also generate resonance in other frequency bands, which can be achieved by adjusting the size of each antenna radiator (such as the wire antenna 141 and the slot antenna 143) in the antenna structure.

[0261] As can be seen, the antenna design provided in Embodiment 7 allows the fed line antenna 141 to operate in CM line antenna mode while simultaneously coupling the slot antenna 143 to operate in DM slot antenna mode, thus covering multiple frequency bands. In this antenna structure, the fed line antenna 121 can also couple more slot antennas 123 of different sizes to cover even more frequency bands.

[0262] Example 8

[0263] Similar to Embodiment 7, the antenna structure provided in Embodiment 8 can also excite CM line antenna mode and DM slot antenna mode. Unlike Embodiment 7, the feed antenna in Embodiment 8 can be... Figure 5A The DM slot antenna shown can be a coupled antenna. Figure 2A The CM line antenna shown.

[0264] like Figure 16As shown, in the antenna structure provided in Embodiment 8, the positional relationship between the CM line antenna and the DM slot antenna can be referenced to the positional relationship between the line antenna 121 and the slot antenna 123 in Embodiment 7, and will not be repeated here. The feed position of the DM slot antenna can be set at the middle position of the DM slot antenna. At this feed position, the positive terminal of the feed source is connected to one side of the DM slot antenna, and the negative terminal of the feed source is connected to the other side of the DM slot antenna.

[0265] Example 9

[0266] In Example 9, the feed antenna can be Figure 3A The DM line antenna shown can be a coupled antenna. Figure 4A The CM slot antenna shown can be excited to produce DM line antenna mode and CM slot antenna mode.

[0267] Figure 17A The antenna design scheme provided in Embodiment 9 is shown. Figure 17A As shown, the antenna structure provided in Embodiment 9 may include: a line antenna 161 and a slot antenna 163. Wherein:

[0268] The wire antenna 161 can be Figure 3A The DM line antenna shown is an example. A feed source can be connected to the middle position of the line antenna 161; that is, the feed position 165 of the line antenna 161 can be the middle position of the line antenna 161. Specifically, the positive terminal of the feed source can be connected to one side of this middle position, and the negative terminal of the feed source can be connected to the other side of this middle position. The line antenna 161 can be a floating antenna, and can be disposed on the inner surface of the rear cover 21, the outer surface of the rear cover 21, or embedded in the rear cover 21.

[0269] Slot antenna 163 can be Figure 4A The CM slot antenna shown is an example. The slot antenna 163 can be formed by slotting a metal plate. The slot antenna 163 may include a slot 167. An opening 169 may be formed on the side of the slot 167 near the line antenna 161, specifically at the middle of that side. The slot 167 can be filled with materials such as polymers, glass, ceramics, or combinations thereof. The opening 169 can also be filled with materials such as polymers, glass, ceramics, or combinations thereof.

[0270] The fed wire antenna 161 and slot antenna 163 can be close to each other and parallel to each other. Specifically, the wire antenna 161 can be parallel to the slot antenna 163. The line connecting the midpoint of the wire antenna 161 and the midpoint of the slot antenna 163 can be perpendicular to both the wire antenna 161 and the slot antenna 163. That is to say, the radiating stub 141-A and the slot 147 share a common perpendicular plane.

[0271] The coupling spacing between the line antenna 161 and the slot antenna 163 can be the distance between the line antenna 161 and the slot antenna 163. This distance can be less than a specific value, such as 5 mm. It should be understood that the smaller the coupling spacing, the stronger the coupling effect. This application does not limit the specific value of the coupling spacing, as long as the fed line antenna 161 can couple with the slot antenna 163.

[0272] Figures 17B-17C Examples of current distribution in DM line antenna mode and CM slot antenna mode are shown. Figure 17B As shown, in the DM line antenna mode, the current 171 is distributed in the same direction as the line antenna 161. The current 171 is stronger in the middle of the line antenna 161 and weaker at both ends. Figure 17C As shown, the current 173 in the CM slot antenna mode is distributed in the same direction around slot 167 on slot antenna 163. Specifically, the current 173 is weak near the middle of slot 167 and strong near both ends of slot 167.

[0273] The antenna design provided in Example 9 allows the fed wire antenna 161 to operate in DM wire antenna mode while simultaneously coupling the slot antenna 163 to operate in CM slot antenna mode, thus covering multiple frequency bands. The wire antenna 161 can be designed as a floating antenna mounted on the rear cover, not occupying internal design space of the electronic device and being minimally affected by internal components. In this antenna structure, the fed wire antenna 161 can also couple more slot antennas 163 of different sizes to cover even more frequency bands.

[0274] Example 10

[0275] Similar to Embodiment 9, the antenna structure provided in Embodiment 10 can also excite DM line antenna mode and CM slot antenna mode. Unlike Embodiment 9, the feed antenna in Embodiment 10 can be... Figure 4A The CM slot antenna shown can be a coupled antenna. Figure 3A The DM line antenna shown.

[0276] like Figure 18 As shown, in the antenna structure provided in Embodiment 10, the positional relationship between the DM line antenna and the CM slot antenna can be referenced to the positional relationship between the line antenna 161 and the slot antenna 163 in Embodiment 9, and will not be repeated here. A feed can be connected to the opening 169 of the CM slot antenna. The positive terminal of the feed can be connected to one side of the opening 169, and the negative terminal of the feed can be connected to the other side of the opening 169.

[0277] Option 3

[0278] In Scheme 3, the slot antenna and the line antenna are combined to obtain an antenna that combines the characteristics of both, thus possessing both line antenna mode and slot antenna mode. These two antenna modes are then excited through a single-feed design, achieving multi-band coverage while miniaturizing the antenna.

[0279] The following describes several embodiments of Scheme 3 in detail with reference to the accompanying drawings.

[0280] Example 11

[0281] In Example 11, the CM line antenna and the CM slot antenna are combined to obtain an antenna structure that combines both CM line antenna mode and CM slot antenna mode. Through feed design, both CM line antenna mode and CM slot antenna mode can be excited.

[0282] Figure 19A The antenna design provided in Implementation 11 is shown. For example... Figure 19A As shown, the antenna structure provided in Embodiment 11 may include: a strip stub 181 and a slot 183. Wherein:

[0283] The strip-shaped branch 181 and the groove 183 can be parallel to each other. The groove 183 can be formed by slotting in the floor. The side 183-A of the groove 183 is close to the strip-shaped branch 181, and the side 183-A may have an opening 185. The opening 185 can be located at the middle position of the side 183-A, or it can be located off-center. In this embodiment, the side 183-A can be referred to as the first side.

[0284] The strip branch 181 may have a connection point B, at which a grounding branch 187 can be connected. The grounding branch 187 can be used to connect the side 183-A of the slot 183 and the strip branch 181 at one end (end C) of the opening 185. A feed point A can be provided on the strip branch 181, which can be used to connect a feed source. Specifically, the positive terminal of the feed source is connected to the feed point A, and the negative terminal of the feed source is connected to the side 183-A of the slot 183 at the other end (end D) of the opening 185.

[0285] The distance L8 between the feed point A and the connection point B on the strip stub 181 can be less than 1 / 4 of the operating wavelength 5. The operating wavelength 5 refers to the operating wavelength of the strip stub 181, that is, the operating wavelength of the CM line antenna mode. In Embodiment 11, the operating wavelength 5 can be referred to as the first wavelength.

[0286] The following explanation Figure 19A The antenna structure shown in the example can produce resonant modes.

[0287] Please see Figure 19B , Figure 19BThe numbers "1", "2", "3", "4", and "5" represent different resonances. This antenna structure can generate resonance "1" near 1.2 GHz, resonance "2" near 1.8 GHz, resonance "3" near 2.3 GHz, resonance "4" near 3.0 GHz, and resonance "5" near 5.3 GHz. Specifically: Resonance "1" can be generated by the quarter-wavelength mode of strip stub 181, which is a resonance of the CM line antenna mode. Resonance "2" can be generated by the half-wavelength mode of strip stub 181, which is a resonance of the DM line antenna mode. Resonance "3" can be generated by a harmonic (double harmonic) of the quarter-wavelength mode of strip stub 181. Resonance "4" can be generated by the quarter-wavelength mode of slot 183, which is a resonance of the CM slot antenna mode. Resonance "5" can be generated by a harmonic of the quarter-wavelength mode of slot 183.

[0288] Figures 19C-19D The current distribution of resonant "1" and "2" is illustrated exemplarily. Figure 19C As shown, the current of resonant "1" is distributed in opposite directions on strip stub 181, with a strong current in the middle and a weak current at the ends. The current of resonant "1" is generated by the quarter-wavelength mode of strip stub 181, which is the current of the CM line antenna mode. The CM line antenna mode also excites the ground plane to resonate. Figure 19D As shown, the current of resonance "2" is distributed in the same direction on strip stub 181, with a strong current in the middle of strip stub 181 and a weak current at both ends of strip stub 181. The current of resonance "4" (not shown) is distributed in the same direction around slot 183, and is the current generated by the half-wavelength mode of slot 183, which is the current of DM line antenna mode.

[0289] Figure 19E An example is shown showing the electric field distribution of the resonant "4". For example... Figure 19E As shown, the electric field of the resonant "4" is distributed in opposite directions on slot 183, with a strong electric field in the middle of slot 183 and a weak electric field at both ends of slot 183. The electric field of the resonant "4" is the electric field generated by the quarter-wavelength mode of slot 183, which is the electric field of the CM slot antenna mode.

[0290] The wavelength mode of resonance "1" generated by the strip stub 181 is not limited; resonance "1" can also be generated by the three-quarter wavelength mode of the strip stub 181, etc. The wavelength mode of resonance "2" generated by the strip stub 181 is not limited; resonance "2" can also be generated by the three-half wavelength mode, five-half wavelength mode, etc. of the strip stub 181. The wavelength mode of resonance "4" generated by the slot 183 is not limited; resonance "4" can also be generated by the three-half wavelength mode, five-half wavelength mode, etc. of the slot 183.

[0291] Apart from Figure 19B The frequency bands shown are 1.2GHz, 1.8GHz, 2.3GHz, 3.0GHz, and 5.3GHz. Figure 19A The exemplary antenna structure can also generate resonance in other frequency bands, which can be achieved by adjusting the size of each branch (such as strip branch 181 and slot 183) in the antenna structure.

[0292] As can be seen, the antenna design scheme provided in Example 11 combines a CM line antenna and a CM slot antenna to obtain an antenna structure that combines the stub characteristics of both CM line antennas and CM slot antennas. Through a single-feed design, both CM line antenna modes and CM slot antenna modes can be excited, covering multiple frequency bands.

[0293] Example 12

[0294] In Example 12, the DM line antenna and the DM slot antenna are combined to obtain an antenna structure that combines the stub characteristics of both DM line antennas and DM slot antennas. Through feed design, both DM line antenna modes and DM slot antenna modes can be excited.

[0295] Figure 20A The antenna design provided in implementation 12 is shown. For example... Figure 20A As shown, the antenna structure provided in Embodiment 12 may include: a strip conductor 191 and a slot 193. Wherein:

[0296] The slot 193 can be formed by slotting the strip conductor 191. The slotting direction of the slot 193 can be perpendicular to the extension direction of the strip conductor 193. The slot 193 can be perpendicular to the strip conductor 193 at the middle position. A feed source can be connected at the middle position of the slot 193, with the positive terminal of the feed source connected to one side of the slot 193 and the negative terminal of the feed source connected to the other side of the slot 193.

[0297] Figures 20B-20C An example is shown Figure 20A The antenna structure has mode current and mode electric field. Figure 20B The current shown is distributed in the same direction on the conductors on both sides of the slot 193, and its direction is consistent with the extension direction of the strip conductor 191. This current is the current of the CM line antenna mode of this antenna structure. Figure 20C The current shown is distributed in opposite directions around slot 193, which is the current in the CM slot antenna mode of this antenna structure. Figure 20C The electric field shown is unidirectionally distributed on slot 193, which is the electric field of the CM slot antenna mode of this antenna structure.

[0298] As can be seen, the antenna design provided in Example 12 can combine the stub features of DM line antenna and DM slot antenna by slotting on the strip conductor, and can excite two slot antenna modes: DM line antenna mode and DM slot antenna mode through the feeding design, so as to achieve coverage of multiple frequency bands while miniaturizing the antenna.

[0299] In embodiment 12, the power supply point A can also be set off from the center of slot 193, as shown below. Figure 20D As shown, the biased feed point A divides slot 193 into a short slot 193-A and a long slot 193-B. This feed point bias allows the antenna structure to cover more frequency bands. The resonant modes that the antenna structure shown in the 20D example can produce are described below.

[0300] Please see Figure 20E , Figure 20E The "1", "2", and "3" represent different resonances. This antenna structure can generate resonance "1" near 1.5 GHz, resonance "2" near 2.4 GHz, and resonance "3" near 4.6 GHz. Specifically: resonance "1" can be generated by the half-wavelength mode of slot 193. Resonance "2" can be generated by the half-wavelength mode of strip conductor 191. Resonance "3" can be generated by a harmonic (third harmonic) of the half-wavelength mode of slot 193.

[0301] Figures 20F-20H The current distribution of resonant "1", "2", and "3" is illustrated exemplarily. Figure 20F As shown, the current of the resonant "1" is distributed in opposite directions around slot 193, with a stronger current around the short slot 193-A and a weaker current around the long slot 193-B. Figure 20G As shown, the current of the resonant "2" is distributed in the same direction on the strip conductor 191, with a stronger current in the middle and a weaker current at both ends. Figure 20H As shown, the current of the resonant "3" is distributed in opposite directions around slot 193, with a stronger current around the long slot 193-B and a weaker current around the short slot 193-A.

[0302] The wavelength mode of resonance "1" generated by slot 193 is not limited; resonance "1" can also be generated by the three-half wavelength mode of slot 193, etc. The wavelength mode of resonance "2" generated by strip stub 181 is not limited; resonance "2" can also be generated by the three-half wavelength mode, five-half wavelength mode, etc. of strip conductor 191.

[0303] Apart from Figure 20E The 1.5GHz band, 2.4GHz band, and 4.6GHz band shown are... Figure 20DThe exemplary antenna structure can also generate resonance in other frequency bands, which can be achieved by adjusting the dimensions of each branch (such as strip conductor 191 and slot 193) in the antenna structure.

[0304] Example 13

[0305] In Example 13, the CM line antenna and the DM slot antenna are combined to obtain an antenna structure that combines the stub characteristics of both CM line antennas and DM slot antennas. Through feed design, both CM line antenna modes and DM slot antenna modes can be excited.

[0306] Figure 21A The antenna design provided in implementation 13 is shown. For example... Figure 21A As shown, the antenna structure provided in Embodiment 13 may include: a strip stub 201 and a slot 203. Wherein:

[0307] The strip branch 201 and the groove 203 can be parallel to each other. The groove 203 can be formed by slotting in the floor. The strip branch 201 may have a connection point B, at which a branch 205 can be connected. The branch 205 can be used to connect one side of the groove 203. Specifically, the connection point B can be set at the middle position of the strip branch 201.

[0308] A feed can be connected to the middle position of slot 203. At this middle position, the positive terminal of the feed is connected to one side of slot 203, and the negative terminal of the feed is connected to the other side of slot 203.

[0309] The following explanation Figure 21A The antenna structure shown in the example can produce resonant modes.

[0310] Please see Figure 21B , Figure 21B The "1", "2", and "3" represent different resonances. This antenna structure can generate resonance "1" near 1.45 GHz, resonance "2" near 2.0 GHz, and resonance "3" near 3.6 GHz. Specifically: Resonance "1" can be generated by the half-wavelength mode of slot 203, which is the resonance of the DM slot antenna mode. Resonance "2" can be generated by the quarter-wavelength mode of strip stub 201, which is the resonance of the CM line antenna mode. Resonance "3" can be generated by a harmonic (3rd harmonic) of the half-wavelength mode of slot 203.

[0311] Figures 21C-21E The current distribution of resonant "1", "2", and "3" is illustrated exemplarily. Figure 21C As shown, the current of resonant "1" is distributed in opposite directions around slot 203, with the current being stronger at both ends of slot 203 and weaker in the middle. The current of resonant "1" is the current generated by the half-wavelength mode of slot 203, which is the current of the DM slot antenna mode. Figure 21DAs shown, the current of resonant "2" is distributed in opposite directions on strip stub 201, with a stronger current in the middle and a weaker current at both ends. The current of resonant "2" is the current generated by the quarter-wavelength mode of strip stub 201, which is the current of the CM line antenna mode. Figure 21E As shown, the current of the resonant "3" is distributed in opposite directions around slot 203, with the current being stronger at both ends of slot 203 and weaker in the middle. The current of the resonant "3" is the current generated by the harmonic (3rd harmonic) of the half-wavelength mode of slot 203, which is the current of the DM slot antenna mode.

[0312] The wavelength mode of resonance "1" generated by slot 203 is not limited; resonance "1" can also be generated by the three-half wavelength mode of slot 203, etc. The wavelength mode of resonance "2" generated by strip stub 201 is not limited; resonance "2" can also be generated by the three-quarter wavelength mode of strip stub 201, etc.

[0313] Apart from Figure 21B The 1.45GHz band, 2.0GHz band, and 3.6GHz band shown are... Figure 21A The exemplary antenna structure can also generate resonance in other frequency bands, which can be achieved by adjusting the size of each branch (such as strip branch 201 and slot 203) in the antenna structure.

[0314] As can be seen, the antenna design scheme provided in Example 13 combines the CM line antenna and the DM slot antenna to obtain an antenna structure that combines the stub characteristics of both CM line antennas and DM slot antennas. Through a single-feed design, both CM line antenna modes and DM slot antenna modes can be excited, covering multiple frequency bands.

[0315] Example 14

[0316] In Example 14, the DM line antenna and the CM slot antenna are combined to obtain an antenna structure that combines the stub characteristics of both DM line antennas and CM slot antennas. Through feed design, both DM line antenna modes and CM slot antenna modes can be excited.

[0317] Figure 22A The antenna design provided in implementation 14 is shown. For example... Figure 22A As shown, the antenna structure provided in Embodiment 14 may include: a strip stub 211 and a slot 213. Wherein:

[0318] The strip-shaped branch 211 and the groove 213 can be parallel to each other. The groove 213 can be formed by slotting in the floor. The side 213-A of the groove 213 is close to the strip-shaped branch 211, and the side 213-A may have an opening 215. The opening 215 may be located at the middle position of the side 213-A, or it may be located off-center. In this embodiment, the side 213-A may be referred to as the first side.

[0319] The strip branch 211 may have connection point A and connection point B. The strip branch 211 may connect to branch 217 at connection point A, and to branch 219 at connection point B. Branch 217 can be used to connect the side 213-A of the groove 213 and the strip branch 211 at one end (end C) of the opening 215. Branch 219 can be used to connect the side 213-A of the groove 213 and the strip branch 211 at the other end (end D) of the opening 215. In this embodiment, connection point A and connection point B are respectively referred to as the first connection point and the second connection point. In this embodiment, branch 217 and branch 219 can be respectively referred to as the first branch and the second branch.

[0320] A feed can be connected at the opening 215. At the opening 215, the positive terminal of the feed is connected to a stub 217 at one end (C end) of the opening 215, and the negative terminal of the feed is connected to a stub 219 at the other end (D end) of the opening 215.

[0321] The following explanation Figure 22A The antenna structure shown in the example can produce resonant modes.

[0322] Please see Figure 22B , Figure 22B The "1", "2", and "3" represent different resonances. This antenna structure can generate resonance "1" near 2.28 GHz, resonance "2" near 3.5 GHz, and resonance "3" near 5.7 GHz. Specifically: Resonance "1" can be generated by the half-wavelength mode of the strip stub 211, which is the resonance of the DM line antenna mode. Resonance "2" can be generated by the quarter-wavelength mode of the slot 213, which is the resonance of the CM slot antenna mode. Resonance "3" can be generated by a harmonic (3rd harmonic) of the half-wavelength mode of the strip stub 211.

[0323] Figures 22C-22E The current distribution of resonant "1", "2", and "3" is illustrated exemplarily. Figure 22C As shown, the current of resonant "1" is distributed in the same direction on strip stub 211, with a stronger current in the middle and a weaker current at both ends. The current of resonant "1" is the current generated by the half-wavelength mode of strip stub 211, which is the current of the DM line antenna mode. Figure 22DAs shown, the current of resonant "2" is distributed in opposite directions around slot 213, with the current being stronger at both ends of slot 213 and weaker in the middle. The current of resonant "2" is the current generated by the quarter-wavelength mode of slot 213, which is the current of the CM slot antenna mode. Figure 22E As shown, the current of the resonant "3" is distributed in the same direction on the strip stub 211, with a stronger current in the middle of the strip stub 211 and a weaker current at both ends of the strip stub 211. The current of the resonant "3" is the current generated by the harmonic (third harmonic) of the half-wavelength mode of the strip stub 211, which is the current of the DM line antenna mode.

[0324] The wavelength mode of the resonant "1" generated by the strip stub 211 is not limited; the resonant "1" can also be generated by the three-half wavelength mode of the strip stub 211, etc. The wavelength mode of the resonant "2" generated by the slot 213 is not limited; the resonant "2" can also be generated by the three-quarter wavelength mode of the slot 213, etc.

[0325] Apart from Figure 22B The 2.28GHz band, 3.5GHz band, and 5.7GHz band shown are... Figure 22A The exemplary antenna structure can also generate resonance in other frequency bands, which can be achieved by adjusting the size of each branch (such as strip branch 211 and slot 213) in the antenna structure.

[0326] When the opening 215 of the groove 213 is offset from the middle position of the side 213-A, Figure 22A The antenna structure shown in the example can also cover more frequency bands.

[0327] As can be seen, the antenna design scheme provided in Example 14 combines the DM line antenna and the CM slot antenna to obtain an antenna structure that combines the stub features of both DM line antennas and CM slot antennas. Through a single-feed design, both DM line antenna modes and CM slot antenna modes can be excited, covering multiple frequency bands.

[0328] The various grooves mentioned in the above embodiments can also be formed on the floor (metal plate) other than PCB 17.

[0329] In this application, the wavelength in a certain wavelength mode of the antenna (such as half-wavelength mode, quarter-wavelength mode, etc.) can refer to the wavelength of the signal radiated by the antenna. For example, the half-wavelength mode of the antenna can generate resonance in the 2.4 GHz frequency band, where the wavelength in the half-wavelength mode refers to the wavelength of the signal radiated by the antenna in the 2.4 GHz frequency band. It should be understood that the wavelength of the radiated signal in air can be calculated as follows: Wavelength = Speed ​​of light / Frequency, where the frequency is the frequency of the radiated signal. The wavelength of the radiated signal in a medium can be calculated as follows: Where ε is the relative permittivity of the medium, and the frequency is the frequency of the radiated signal.

[0330] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An antenna device, characterized in that, The antenna device includes a strip radiator with a feed point and a ground point. The ground point is connected to a grounding branch, which is used to ground the strip radiator. The sum of the distance between the feed point and the ground point and the length of the grounding branch is less than 1 / 4 of a first wavelength. The strip radiator contains a first current and a second current. The first frequency of the first current is different from the second frequency of the second current. The first current is in opposite directions on both sides of the feed point, while the second current is in the same direction on both sides of the feed point. The first wavelength corresponds to the first frequency of the first current.

2. The antenna device as claimed in claim 1, characterized in that, The strip radiator has a first end and a second end, and the length of the strip radiator from the feed point to the first end is not equal to the length of the strip radiator from the feed point to the second end.

3. The antenna device as described in claim 2, characterized in that, The antenna device includes a metal plate, which is grounded, and a grounding branch is connected to the metal plate. A third current is distributed on the metal plate, and the third frequency of the third current is different from the first frequency of the first current or the second frequency of the second current.

4. The antenna device as described in claim 3, characterized in that, The third frequency of the third current is lower than the first frequency of the first current and / or the second frequency of the second current.

5. The antenna device as described in any one of claims 1-4, characterized in that, The antenna device includes a metal plate, and the grounding branch is a metal spring attached to the metal plate, the metal spring being connected to the strip radiator.

6. An electronic device, characterized in that, The electronic device includes an antenna device as described in any one of claims 1-5.

7. The electronic device as claimed in claim 6, characterized in that, The electronic device includes a metal frame, and the strip radiator is part of the metal frame of the electronic device.

8. The electronic device as claimed in claim 7, characterized in that, The metal frame is either located at the bottom of the electronic device or at the top of the electronic device.

9. The electronic device as claimed in any one of claims 6-8, characterized in that, The antenna device includes a metal plate, and the electronic device includes a floor, wherein the metal plate is the floor, and the floor includes a printed circuit board (PCB) floor of the electronic device or a metal frame of the electronic device.

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