WO2021088736A1 - Élément rayonnant d'antenne et dispositif électronique - Google Patents

Élément rayonnant d'antenne et dispositif électronique Download PDF

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Publication number
WO2021088736A1
WO2021088736A1 PCT/CN2020/125428 CN2020125428W WO2021088736A1 WO 2021088736 A1 WO2021088736 A1 WO 2021088736A1 CN 2020125428 W CN2020125428 W CN 2020125428W WO 2021088736 A1 WO2021088736 A1 WO 2021088736A1
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WIPO (PCT)
Prior art keywords
frequency band
antenna radiator
radiating portion
point
radiating
Prior art date
Application number
PCT/CN2020/125428
Other languages
English (en)
Chinese (zh)
Inventor
彭致勇
向元彬
Original Assignee
RealMe重庆移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201911072552.2A external-priority patent/CN112787077B/zh
Priority claimed from CN201921896214.6U external-priority patent/CN210805993U/zh
Application filed by RealMe重庆移动通信有限公司 filed Critical RealMe重庆移动通信有限公司
Publication of WO2021088736A1 publication Critical patent/WO2021088736A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/48—Earthing means; Earth screens; Counterpoises
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors

Definitions

  • This application relates to the field of antenna technology, in particular to an antenna radiator and electronic equipment.
  • the 5G communication frequency band is considered to be regulated and divided, including the N41 (2515-2675MHz) frequency band, the N78 (3400-3600MHZ) frequency band, and the N79 (4800-4900MHz) frequency band.
  • the embodiments of the present application provide an antenna radiator and electronic equipment, which can simultaneously realize the transmission of radio frequency signals in three frequency bands.
  • the antenna radiator provided by the embodiments of the present application includes a first ground point, a feed point, and a second ground point.
  • the antenna radiator is fed through the feed point, and the antenna radiator passes through The first ground point and the second ground point are grounded, and the antenna radiator further includes:
  • a second radiating part includes a first end and a second end that are oppositely disposed, the first end is connected to the first radiating part;
  • the third radiating portion includes a third end and a fourth end that are opposed to each other, the third end is connected to the second end, and the fourth end extends toward the first end to Forming the third radiating portion and the second radiating portion into a ring structure, and forming a gap between the third radiating portion and the second radiating portion;
  • the first radiating part is used to radiate radio frequency signals in the first frequency band
  • the second radiating part and the third radiating part are electromagnetically coupled through the gap and used to radiate radio frequency signals in the second frequency band.
  • the ring structure formed by the second radiating portion and the third radiating portion is used to radiate radio frequency signals in the third frequency band.
  • the electronic device provided by the embodiment of the present application includes an antenna radiator, the antenna radiator includes a first ground point, a feed point, and a second ground point, and the antenna radiator is implemented by the feed point Feeding, the antenna radiator is grounded through the first ground point and the second ground point, and the antenna radiator further includes:
  • a second radiating part includes a first end and a second end that are oppositely disposed, the first end is connected to the first radiating part;
  • the third radiating portion includes a third end and a fourth end that are opposed to each other, the third end is connected to the second end, and the fourth end extends toward the first end to Forming the third radiating portion and the second radiating portion into a ring structure, and forming a gap between the third radiating portion and the second radiating portion;
  • the first radiating part is used to radiate radio frequency signals in the first frequency band
  • the second radiating part and the third radiating part are electromagnetically coupled through the gap and used to radiate radio frequency signals in the second frequency band.
  • the ring structure formed by the second radiating portion and the third radiating portion is used to radiate radio frequency signals in the third frequency band;
  • the electronic device also includes:
  • a circuit board the circuit board is provided with a first ground terminal, a feeding terminal and a second ground terminal, the first ground terminal is connected to the first ground point, and the feeding terminal is connected to the feeding point Connected, the second ground terminal is connected to the second ground point.
  • FIG. 1 is a schematic diagram of the first structure of an electronic device provided by an embodiment of this application.
  • FIG. 2 is a schematic diagram of the first structure of an antenna radiator provided by an embodiment of the application.
  • FIG. 3 is a schematic diagram of a second structure of an antenna radiator provided by an embodiment of the application.
  • FIG. 4 is a schematic diagram of a third structure of an antenna radiator provided by an embodiment of the application.
  • FIG. 5 is a schematic diagram of a fourth structure of an antenna radiator provided by an embodiment of the application.
  • FIG. 6 is a schematic diagram of a second structure of an electronic device provided by an embodiment of this application.
  • FIG. 7 is a S11 parameter diagram of the antenna radiator provided by an embodiment of the application.
  • FIG. 8 is a current distribution diagram of the antenna radiator provided by an embodiment of the application at 3500 MHz.
  • FIG. 9 is a current distribution diagram of the antenna radiator provided by an embodiment of the application at 2620 MHz.
  • FIG. 10 is a current distribution diagram of the antenna radiator provided by an embodiment of the application at 4940 MHz.
  • FIG. 11 is a schematic diagram of a fifth structure of an antenna radiator provided by an embodiment of the application.
  • FIG. 12 is a schematic diagram of a sixth structure of an antenna radiator provided by an embodiment of the application.
  • FIG. 13 is a partial equivalent circuit diagram of the antenna radiator provided by an embodiment of the application when working.
  • FIG. 14 is a schematic diagram of a third structure of an electronic device provided by an embodiment of the application.
  • the embodiments of the present application provide an antenna radiator and electronic equipment.
  • the antenna radiator may be provided in an electronic device.
  • Electronic equipment can be smart phones, tablet computers, etc., but also game equipment, AR (Augmented Reality) equipment, automotive equipment, data storage devices, audio playback devices, video playback devices, notebook computers, desktop computing devices, etc. .
  • FIG. 1 is a schematic diagram of the first structure of an electronic device provided by an embodiment of this application.
  • the electronic device 100 includes a cover plate 10, a display screen 20, a middle frame 30, a circuit board 40, a battery 50, a back cover 60 and an antenna radiator 70.
  • the display screen 20 can be used to display information such as images and text.
  • the display screen 20 may be a liquid crystal display (Liquid Crystal Display, LCD) or an organic light-emitting diode display (Organic Light-Emitting Diode, OLED).
  • LCD Liquid Crystal Display
  • OLED Organic Light-Emitting Diode
  • the cover plate 10 can be installed on the middle frame 30, and the cover plate 10 covers the display screen 20 to protect the display screen 20 from being scratched or damaged by water.
  • the cover plate 10 may be a transparent glass cover plate, so that the user can observe the content displayed on the display screen 20 through the cover plate 10.
  • the cover plate 10 may be a glass cover plate made of sapphire.
  • the display screen 20 may be installed on the middle frame 30 and connected to the back cover 60 through the middle frame 30 to form the display surface of the electronic device 100.
  • the display screen 20 serves as the front shell of the electronic device 100, and forms the housing of the electronic device 100 together with the back cover 60 for accommodating other electronic devices of the electronic device 100.
  • the housing may be used to accommodate electronic devices such as a processor, a memory, one or more sensors, and lighting elements of the electronic device 100.
  • the display screen 20 may include a display area and a non-display area. Among them, the display area performs the display function of the display screen 20 and is used to display information such as images and text. No information is displayed in the non-display area.
  • the non-display area can be used to set up electronic devices such as cameras and touch electrodes on the display screen.
  • the display screen 20 may be a full screen. At this time, the display screen 20 can display information in a full screen, so that the electronic device 100 has a larger screen-to-body ratio.
  • the display screen 20 only includes a display area and does not include a non-display area, or the area of the non-display area is relatively small for the user.
  • electronic devices such as cameras and proximity sensors in the electronic device 100 can be hidden under the display screen 20, and the fingerprint recognition module of the electronic device 100 can be arranged on the back cover 60 of the electronic device 100.
  • the structure of the display screen 20 is not limited to this.
  • the display screen 20 may also be a special-shaped screen.
  • the middle frame 30 may have a thin plate or sheet-like structure, or a hollow frame structure.
  • the middle frame 30 is used to provide support for the electronic devices in the electronic device 100 to install the electronic devices in the electronic device 100 together.
  • electronic devices such as a camera, a receiver, a circuit board 40, and a battery 50 in the electronic device 100 can all be mounted on the middle frame 30 for fixing.
  • the circuit board 40 may be installed on the middle frame 30.
  • the circuit board 40 may be the main board of the electronic device 100.
  • the circuit board 40 can be integrated with one of a microphone, a speaker, a receiver, a headphone interface, a universal serial bus interface (USB interface), a camera assembly, a distance sensor, an ambient light sensor, a gyroscope, and a processor, etc. Two or more.
  • the circuit board 40 may be provided with a radio frequency circuit, a first ground terminal 41, a feed terminal 42 and a second ground terminal 43.
  • the feeding terminal 42 may be electrically connected to the feeding point of the antenna radiator 70 to feed the radio frequency signal transmitted by the radio frequency circuit to the antenna radiator 70.
  • the first ground terminal 41 and the second ground terminal 43 can realize the grounding of the antenna radiator 70.
  • the battery 50 may be installed on the middle frame 30. At the same time, the battery 50 is electrically connected to the circuit board 40 so that the battery 50 can supply power to the electronic device 100.
  • the circuit board 40 may be provided with a power management circuit. The power management circuit is used to distribute the voltage provided by the battery 50 to various electronic devices in the electronic device 100.
  • the battery 50 may be a rechargeable battery.
  • the battery 50 may be a lithium ion battery.
  • the back cover 60 is located on the side of the circuit board 40 away from the display screen 20, that is, the back cover 60 is located at the outermost part of the electronic device 100 and is used to form the outer contour of the electronic device 100.
  • the back cover 60 may be integrally formed. During the molding process of the rear cover 60, a rear camera hole, a fingerprint recognition module mounting hole and other structures may be formed on the rear cover 60.
  • the back cover 60 may be made of metal, such as magnesium alloy, stainless steel and other metals.
  • the area corresponding to the antenna radiator 70 on the metal back cover can be provided with holes, holes, etc. to form a clear area of the antenna radiator 70 on the metal back cover.
  • the material of the back cover 60 of the embodiment of the present application is not limited to this, and other methods may also be used.
  • the back cover 60 may be made of plastic material.
  • the back cover 60 may be made of ceramic material or glass material.
  • the back cover 60 may include a plastic part and a metal part, wherein the back cover area corresponding to the antenna radiator 70 may be a plastic part, and other back cover areas may be metal parts.
  • the electronic device 100 has more and more functions, more and more devices are installed inside the electronic device 100.
  • the size of the electronic device 100 remains the same, the installation of additional devices inside the electronic device 100 will cause additional The space of the electronic device 100 is occupied, and the installation space left for the antenna radiator 70 is also getting smaller and smaller.
  • multiple antenna radiators 70 are often required to realize the transmission of multi-band radio frequency signals, which undoubtedly makes the installation space of the multiple antenna radiators 70 narrower and affects the radio frequency performance of the antenna radiators 70.
  • the antenna radiator 70 occupies a small space, and the radio frequency performance of the antenna radiator 70 is also high. better.
  • FIG. 2 is a schematic diagram of the first structure of the antenna radiator provided by an embodiment of the application.
  • the antenna radiator 70 can be installed in the electronic device 100, and the electronic device 100 can refer to the above-mentioned electronic device 100, which will not be repeated here.
  • the antenna radiator 70 may include a first radiating part 71, a second radiating part 72, and a third radiating part 73 that are sequentially connected.
  • the first radiating part 71 may include two oppositely disposed ends
  • the second radiating part 72 may include a first end 721 and a second end 722 disposed oppositely
  • the third radiating part 73 may also include a third oppositely disposed end. End 731 and the fourth end 732.
  • the first end 721 of the second radiator 72 is connected to one end of the first radiator 71
  • the other end of the first radiator 71 is a free end 711
  • the second end 722 of the second radiator 72 is connected to the third radiator 71.
  • the third end 731 of the portion 73 is connected, and further, through the second radiating portion 72, the first radiating portion 71, the second radiating portion 72, and the third radiating portion 73 are connected as a whole.
  • the fourth end 732 of the third radiating portion 73 may extend toward the first end 721 of the second radiating portion 72, so that the third radiating portion 73 and the second radiating portion 72 form an annular structure with openings, and the third radiating portion A gap 77 is formed between the portion 73 and the second radiating portion 72.
  • the antenna radiator 70 of the present application can transmit radio frequency signals in three frequency bands, and the specific transmission conditions are as follows:
  • the first radiating part 71 may be used to radiate radio frequency signals in the first frequency band.
  • a feeding point for example, the feeding point 75 in FIG. 3
  • a ground point for example, the first ground point 74 in FIG. 3
  • the ground point is used to connect the first radiating part 71 It is electrically connected to the ground terminal of the circuit board, and the feeding point is used to provide electric power to the first radiating part 71.
  • the feeding point and the grounding point are electrically connected to the first radiating part 71, the feeding point, the grounding point and the The first radiator 71 forms the first radiation path 101 and forms an inverted-F antenna structure (Inverted-F antenna structure for short), which can radiate radio frequency signals in the first frequency band outward.
  • inverted-F antenna structure Inverted-F antenna structure for short
  • the effective length of the first radiating portion 71 at this time is the entire length of the first radiating portion 71.
  • FIG. 4 is a schematic diagram of a third structure of the antenna radiator provided by an embodiment of the application.
  • the second radiating portion 72 and the third radiating portion 73 can be electromagnetically coupled through the gap 77 to form a whole and be used to radiate the radio frequency signal of the second frequency band.
  • the second radiating portion 72 and the third radiating portion 73 are formed by electromagnetic coupling through the gap 77.
  • a feeding point for example, the feeding point 75 in FIG. 4
  • a grounding point for example, the second in FIG. 4
  • the grounding point 76 the grounding point is used to electrically connect the whole formed by electromagnetic coupling of the second radiating portion 72 and the third radiating portion 73 through the gap 77 to the grounding end, and the feeding point is used for the second radiating portion 72 and the second radiating portion 72 and the first radiating portion.
  • the three radiating parts 73 realize electromagnetic coupling through the gap 77 to provide electric power as a whole.
  • the feeding point may be arranged on the second radiating part 72, and the grounding point may be arranged on the third radiating part 73; or, the feeding point may be arranged on the third radiating part 73, and the grounding point may be arranged on On the second radiating portion 72; or, the feeding point and the grounding point are both set on the second radiating portion 72 or the third radiating portion 73.
  • the feeding point and the grounding point are respectively electrically connected to the second radiating portion 72 and the third radiating portion 73 through the gap 77 to form an integral electrical connection, the feeding point, the grounding point, and the second radiating portion 72 and the third radiating portion 73.
  • the whole formed by electromagnetic coupling through the gap 77 can also form the second radiation path 102 and form an inverted F antenna structure, which can radiate the radio frequency signal of the second frequency band outward.
  • the effective length is the longer of the second radiating part 72 and the third radiating part 73.
  • the length of the elder For example, when the length of the second radiating portion 72 is greater than the length of the third radiating portion 73, the effective length of the overall radiating portion is the length of the second radiating portion 72. When the length of the second radiating portion 72 is less than the length of the third radiating portion 73, the effective length of the overall radiating portion is the length of the third radiating portion 73.
  • FIG. 5 is a schematic diagram of a fourth structure of the antenna radiator provided by an embodiment of the application.
  • the ring structure formed by the second radiating portion 72 and the third radiating portion 73 is used to radiate radio frequency signals in the third frequency band.
  • the second radiating part 72 may be provided with a feeding point (for example, the feeding point 75 in FIG. 5), and the third radiating part 73 may be provided with a grounding point (for example, the second grounding point 76 in FIG. 5). It is used to electrically connect the ring structure formed by the second radiating portion 72 and the third radiating portion 73 to the ground terminal, and the feeding point is used to provide electric power to the ring structure formed by the second radiating portion 72 and the third radiating portion 73.
  • the feeding point and the grounding point are electrically connected to the ring structure formed by the second radiating portion 72 and the third radiating portion 73, respectively, the feeding point, the grounding point, and the second radiating portion 72 and the third radiating portion 73 may form a second radiating portion.
  • the three radiation paths 103 form a loop antenna structure (loop antenna for short), which can radiate radio frequency signals in the third frequency band outward.
  • the effective length thereof is the sum of the lengths of the second radiating portion 72 and the third radiating portion 73.
  • the antenna radiator 70 of the embodiment of the present application has a second radiation path 102 that radiates radio frequency signals in the second frequency band and a third radiation path 103 that radiates radio frequency signals in the third frequency band, although the second radiation part is shared 72 and the third radiating portion 73, but since the second radiating portion 72 and the third radiating portion 73 are coupled through a gap in the second radiation path 102, the effective length of the radiation is only the length of the second radiating portion 72 or the third radiation The length of the portion 73; and in the third radiation path 103, the second radiation portion 72 and the third radiation portion 73 form a ring structure, the effective length of its radiation is the length of the second radiation portion 72 and the third radiation portion 73 And, it can be seen that the effective radiation length of the second radiation path 102 is different from the effective radiation path of the third radiation path 103, and the antenna radiator 70 can radiate radio frequencies of two different frequency bands through the second radiation part 72 and the third radiation part 73 signal.
  • the first radiating part 71 is used to radiate radio frequency signals in the first frequency band
  • the second radiating part 72 and the third radiating part 73 are electromagnetically coupled through the gap 77 and used to radiate radio frequency in the second frequency band.
  • the ring structure formed by the second radiating portion 72 and the third radiating portion 73 is used to radiate the radio frequency signal of the third frequency band.
  • a small area of the antenna radiator 70 can be fed to simultaneously realize the transmission of radio frequency signals in three frequency bands.
  • the overall size of the antenna radiator 70 is small, and it occupies There is less space inside the electronic device 100, which can reduce the installation difficulty of the antenna radiator 70.
  • the antenna radiator 70 of the embodiment of the present application can radiate radio frequency signals of one frequency band alone, or can radiate the above three radio frequency signals at the same time.
  • the radio frequency circuit feeds the radio frequency signal of a single frequency band to the antenna radiator 70, for example, when the radio frequency signal of the N78 (3400MHZ to 3600MHZ) frequency band is fed, the feeding point, the grounding point and the first radiator 71 form The first radiation path 101 can radiate radio frequency signals in this frequency band to the outside of the electronic device 100.
  • the feeding point, the grounding point, and the second radiating part 72 and the third radiating part 73 are electromagnetically coupled through the gap 77 to form a second radiation path.
  • 102 can radiate radio frequency signals in this frequency band to the outside of the electronic device 100.
  • the feeding point, the grounding point, and the third radiation path 103 formed by the second radiating part 72 and the third radiating part 73 can radiate the radio frequency signal of this frequency band.
  • the outside of the electronic device 100 To the outside of the electronic device 100.
  • the first radiation path 101 can radiate radio frequency signals of the first frequency band, such as the N78 frequency band, and at the same time, the second radiation path 102 can radiate the first frequency band.
  • the third radiation path 103 can radiate the radio frequency signal in the third frequency band, such as the N79 frequency band.
  • the second radiating part 72 and the third radiating part 73 are multiplexed, and the current on the second radiating part 72 and the third radiating part 73 is in the second frequency band The superposition of the radio frequency signal current and the third frequency band radio frequency signal current.
  • first radiation path 101, the second radiation path 102, and the third radiation path 103 may each have its own feeding point and grounding point.
  • the above-mentioned first radiation path 101, second radiation path 102, and third radiation path 103 may also partially share a feeding point and a ground point.
  • FIG. 6 is a schematic diagram of a second structure of an electronic device provided by an embodiment of this application.
  • the antenna radiator 70 may further include a first ground point 74, a feed point 75 and a second ground point 76.
  • the first ground point 74 may be located on the first radiating portion 71
  • the second ground point 76 may be located on the third radiating portion 73
  • the feeding point 75 may be located on the first radiating portion 71 or the second radiating portion 72.
  • the first radiation path 101 may include a first ground point 74, a feeding point 75 and a first radiation part 71.
  • the second radiation path 102 may include a feeding point 75, a second ground point 76, and an overall structure formed by electromagnetic coupling between the second radiating portion 72 and the third radiating portion 73 through a gap 77.
  • the third radiation path 103 may include a feeding point 75, a second ground point 76, and a ring-shaped third radiation path formed by the second radiation portion 72 and the third radiation portion 73. That is, the first radiation path 101, the second radiation path 102, and the third radiation path 103 can share a feeding point 75, which can simplify the routing of the RF circuit on the circuit board 40 for feeding signals to the antenna radiator 70.
  • the second radiating portion 72 and the third radiating portion 73 can share the second ground point 76, and the wiring between the antenna radiator 70 and the circuit board 40 can also be simplified.
  • the first ground terminal 41 of the circuit board 40 can be electrically connected to the first ground point 74 through a ground wire, a ground spring, etc.
  • the feed end 42 of the circuit board 40 can be connected to the feed point 75 through a feed line, a feed point spring, etc.
  • the second grounding terminal 43 of the circuit board 40 may also be electrically connected to the second grounding point 76 through a grounding wire, a grounding elastic piece, or the like.
  • the electronic device 100 may further include a first elastic piece 81, a second elastic piece 82, and a third elastic piece 83.
  • One end of the first elastic piece 81 is electrically connected to the first ground terminal 41, and the other end of the first elastic piece 81 is electrically connected to the first ground point 74.
  • One end of the second elastic piece 82 is electrically connected to the feeding terminal 42, and the other end of the second elastic piece 82 is electrically connected to the feeding point 75.
  • One end of the third elastic piece 83 is electrically connected to the second ground terminal 43, and the other end of the third elastic piece 83 is electrically connected to the second ground point 76.
  • Three elastic pieces are used to realize the electrical connection between the circuit board 40 and the antenna radiator 70.
  • the elastic deformation performance of the elastic pieces can make the antenna radiator 70 and the circuit board 40 difficult to separate, and ensure that the antenna radiator 70 and the circuit board 40 are not easily separated.
  • the radio frequency signal transmitted by the radio frequency circuit on the circuit board 40 can be fed to the antenna radiator 70 through the feed terminal 42 and the feed point 75, and then pass through the antenna radiator. 70 radiates into free space.
  • the radio frequency signal transmitted by the radio frequency circuit on the circuit board 40 can be fed to the antenna radiator 70 through the feed terminal 42 and the feed point 75, and then pass through the antenna radiator. 70 radiates into free space.
  • three resonant frequencies can be generated for transmission of radio frequency signals in three frequency bands, respectively.
  • FIG. 7 is a S11 parameter diagram of the antenna radiator provided by an embodiment of the application. It can be seen from FIG. 7 that the antenna radiator 70 can cover three frequency bands of 2515MHZ to 2675MHZ, 3400MHZ to 3600MHZ, and 4800MHZ to 4900MHZ under the -4db impedance bandwidth. That is, the antenna radiator 70 of the embodiment of the present application can realize the transmission of radio frequency signals in three different frequency bands.
  • the feed point 75, the first ground point 74, and the first radiation portion 71 may form the aforementioned first radiation path 101 to radiate radio frequency signals in the first frequency band.
  • the feeding point 75, the first ground point 74, and the first radiating portion 71 form an inverted IFA antenna radiator, the mode of which is a quarter wavelength.
  • FIG. 8 is a current distribution diagram of the antenna radiator provided by an embodiment of the application at 3500 MHz.
  • the free end 711 of the first radiating part 71 is a strong electric field, where the voltage is the largest and the current is the smallest;
  • the first grounding point 74 is a strong current (magnetic field), and the current of the first grounding point 74 is the largest and the voltage The smallest.
  • the feed point 75, the second ground point 76, the second radiating portion 72 and the third radiating portion 73 are electromagnetically coupled through the gap 77 to form the overall structure formed by the above-mentioned second radiation path 102 to radiate radio frequency signals in the second frequency band.
  • the feed point 75, the second ground point 76, the second radiating portion 72 and the third radiating portion 73 are electromagnetically coupled through the gap 77 to form an IFA antenna radiator formed by an integrated structure, and its mode can also be quadrant.
  • FIG. 9 is a current distribution diagram of the antenna radiator provided in an embodiment of the application at 2620 MHz.
  • the place where the second radiating portion 72 and the third radiating portion 73 are connected is a strong electric field, where The voltage is the largest and the current is the smallest; the second grounding point 76 is a strong current point (a strong magnetic field), and the second grounding point 76 has the largest current and the smallest voltage.
  • the loop structure formed by the feeding point 75, the second ground point 76, and the second radiating portion 72 and the third radiating portion 73 together form the aforementioned third radiation path 103 to radiate radio frequency signals in the third frequency band.
  • the loop antenna radiator formed by the loop structure formed by the feeding point 75, the second radiating portion 72 and the third radiating portion 73, and the second ground point 76 has a mode of one wavelength.
  • FIG. 10 is a current distribution diagram of the antenna radiator provided by an embodiment of the application at 4940 MHz.
  • the place where the second grounding point 76, the second radiating part 72 and the third radiating part 73 are connected is the place where the second end 722 of the second radiating part 72 and the third end 731 of the third radiating part 73 are connected) is the point of maximum current .
  • the current is mainly concentrated at the second ground point 76 and the junction of the second radiating portion 72 and the third radiating portion 73.
  • the distance between the feeding point 75 and the grounding point (for example, the first grounding point 74 and the second grounding point 76), and the distance between the feeding point 75 and the radiator
  • the distance between the ends (for example, the free end 711 of the first radiating portion 71, the second end 722 of the second radiating portion 72, or the third end 731 of the third radiating portion 73) can affect the effectiveness of the IFA antenna radiator Electric length.
  • the effective electrical length of the antenna radiator 70 increases. It can be seen from the wavelength equal to the wave velocity divided by the frequency that the higher the frequency , The smaller the wavelength, that is, when the effective electrical length of the antenna radiator 70 increases, the resonant frequency of the antenna radiator 70 decreases. On the contrary, when the feed point 75 and the ground point, the distance between the feed point 75 and the end of the radiator When decreasing, the effective electrical length of the antenna radiator 70 decreases, and the resonance frequency of the antenna radiator 70 increases.
  • the feeding point 75 in FIG. 2 may be located between the first ground point 74 and the second radiating portion 72.
  • the feeding point 75, the first grounding point 74, and the first radiating portion 71 form a first IFA antenna radiator
  • the feeding point 75, the second grounding point 76, and the second radiating portion 72 and the third radiating portion 73 In the second IFA antenna radiator formed by electromagnetic coupling through the gap 77, the first distance between the feeding point 75 and the free end 711 of the first radiating portion 71 and the second distance between the feeding point 75 and the second radiating portion 72
  • the adjustable range of the second distance between the ends 722 is relatively moderate, which is convenient for adjusting the effective electrical length of the first IFA antenna radiator and the second IFA antenna radiator.
  • FIG. 11 is a schematic diagram of a fifth structure of an antenna radiator provided by an embodiment of the application.
  • the projection of the second ground point 76 on the radiator branch formed by the first radiating part 71 and the second radiating part 72 may be located on the second radiating part 72, and located at the first ground point 74 and the feeder. Below electric point 75. At this time, the feeding point 75 may be located between the first ground point 74 and the second ground point 76.
  • the adjustable range of the first distance between the feeding point 75 and the first grounding point 74 and the second distance between the feeding point 75 and the second grounding point 76 are relatively moderate, which is convenient for adjusting the first IFA antenna
  • the projection of the second ground point 76 on the radiator branch formed by the first radiating portion 71 and the second radiating portion 72 may be located between the first ground point 74 and the feeding point 75.
  • the feed point 75, the second radiating portion 72, and the second ground point 76 form a longer path for the loop antenna radiator, and the second ground point 76 can select a wider range of positions, which is convenient for adjusting the range of the third frequency band.
  • the feeding point 75 and the first grounding point 74 may be located on the first radiating part 71, and further, the feeding point 75, the first grounding point 74 and the first radiating part 71 may form a first IFA antenna radiator .
  • the length and width of the first radiating portion 71 and the distance between the first ground point 74 and the feeding point 75 the range of the radio frequency signal in the first frequency band radiated by the first IFA antenna radiator can be adjusted.
  • the second grounding point 76 can be located on the third radiating part 73, and the whole of the feeding point 75, the second grounding point 76, the second radiating part 72 and the third radiating part 73 through the gap 77 to achieve electromagnetic coupling can also form a second IFA antenna radiator.
  • the second frequency band radiated by the second IFA antenna radiator can be adjusted. The range of the radio frequency signal.
  • a loop antenna radiator can be formed between the feeding point 75, the second radiating portion 72, the third radiating portion 73, and the second grounding point 76.
  • FIG. 12 is a schematic diagram of a sixth structure of an antenna radiator provided by an embodiment of the application.
  • the first radiating portion 71 may include a first side surface 711 and a second side surface 712 that are opposed to each other
  • the second radiating portion 72 includes a third side surface 721 and a fourth side surface 722 that are opposed to each other
  • the third radiating portion 73 includes an opposed side surface.
  • the fifth side 731 and the sixth side 732 may include a first side surface 711 and a second side surface 712 that are opposed to each other
  • the second radiating portion 72 includes a third side surface 721 and a fourth side surface 722 that are opposed to each other
  • the third radiating portion 73 includes an opposed side surface.
  • the fifth side 731 and the sixth side 732 may include a first side surface 711 and a second side surface 712 that are opposed to each other
  • the second radiating portion 72 includes a third side surface 721 and a fourth side surface 722 that are opposed to each other
  • the fourth side surface 722 and the fifth side surface 731 may be disposed oppositely, and there may be a gap 77 between them.
  • the first side surface 711 and the sixth side surface 732 may be on the same plane, and the second side surface 712 may be on the same plane as the third side surface 721.
  • the width B1 of the first radiating portion 71 of the antenna radiator 70 may be equal to the width B2 of the second radiating portion 72, the width B3 of the third radiating portion 73, and the distance between the second radiating portion 72 and the third radiating portion 73 The sum of the width B4 of the gap 77.
  • the length of the first radiating portion 71 is relatively short, and the area occupied by the first radiating portion 71, the second radiating portion 72, and the third radiating portion 73 is also relatively small.
  • the antenna radiator 70 and the electronic device 100 of the embodiments of the present application can be adjusted by adjusting the shape and size of the antenna radiator 70, and the positions of the feeding point 75, the first grounding point 74, and the second grounding point 76. Adjust the range of the first frequency band, the second frequency band, and the third frequency band.
  • the first frequency band, the second frequency band, and the third frequency band may be three different frequency bands to realize the transmission of multi-band radio frequency signals. At least two frequency bands of the first frequency band, the second frequency band, and the third frequency band may also be the same, so as to broaden the bandwidth of the antenna radiator 70.
  • the first frequency band, the second frequency band, or the third frequency band may be any one of radio frequency signals in the middle, high, and low frequency bands of the cellular frequency band, radio frequency signals in the wifi frequency band, and radio frequency signals in the GPS frequency band.
  • the first frequency band may be the N78 (3400MHZ to 3600MHZ) frequency band
  • the second frequency band may be the N41 (2515MHZ to 2675MHz) frequency band
  • the third frequency band may be N79 (4800MHZ to 4900MHz).
  • Frequency band the antenna radiator 70 of the embodiment of the present application can be fed with a small area of the antenna radiator 70 to realize the transmission of radio frequency signals of three different frequency bands for 5G communication, which is more than that provided on the electronic device 100.
  • the antenna radiator 70 in the embodiment of the present application has a smaller area.
  • the first frequency band may also be a wireless fidelity (Wireless Fidelity, referred to as wifi) 2400MHZ frequency band; the second frequency band may also be a satellite in the LI (1575.42MHZ) frequency band transmitted by a Global Positioning System (Global Positioning System, referred to as GPS) satellite Signal; the third frequency band may also be the wifi-5000MHZ frequency band.
  • the antenna radiator 70 of the embodiment of the present application the transmission of radio frequency signals of three different frequency bands of GPS/wifi2.4g/wifi5g can be realized by feeding power to a small-area antenna radiator 70.
  • the antenna radiator 70 in the embodiment of the present application has a smaller area.
  • the working process of the antenna radiator 70 according to the embodiment of the present application will be described in detail again with reference to FIGS. 8 to 10:
  • the radio frequency circuit on the control circuit board 40 of the electronic device 100 radiates the first radio frequency signal in the N78 frequency band
  • the current of the radio frequency circuit flows from the feeding terminal 42 into the feeding point 75.
  • the electrical point 75, the first ground point 74 and the first radiation portion 71 form a first radiation path 101, which can radiate the first radio frequency signal in the N78 frequency band to the outside.
  • the radio frequency circuit on the control circuit board 40 of the electronic device 100 radiates the second radio frequency signal in the N41 frequency band
  • the current of the radio frequency circuit flows from the feeding terminal 42 into the feeding point 75.
  • the electrical point 75, the second ground point 76, the second radiating portion 72 and the third radiating portion 73 are electromagnetically coupled through the gap 77 to form a second radiation path 102, which can radiate the second radio frequency signal in the N41 frequency band.
  • the radio frequency circuit on the control circuit board 40 of the electronic device 100 radiates the third radio frequency signal in the N79 frequency band
  • the current of the radio frequency circuit flows from the feeding terminal 42 into the feeding point 75.
  • the loop structure formed by the electrical point 75, the second ground point 76, and the second radiating portion 72 and the third radiating portion 73 together form the third radiation path 103, which can radiate the third radio frequency signal of the N79 frequency band to the outside.
  • the radio frequency circuit on the circuit board 40 can directly radiate radio frequency signals of different frequency bands through the antenna radiator 70, compared with three antenna radiators 70 provided in the electronic device 100
  • the antenna radiator 70 of the embodiment of the present application has a small area, and the installation difficulty of the antenna radiator 70 is relatively low.
  • the antenna radiator of the embodiment of the present application 70 does not need to set a switch to switch between the three antenna radiators, and the structure of the entire antenna radiator 70 is simpler.
  • changing the inductance of the first radiation path 101 can make the first radiation path 101 radiate other radio frequency signals different from the first radio frequency signal; changing the inductance of the second radiation path 102 It is also possible to make the second radiation path 102 radiate other radio frequency signals different from the second radio frequency signal.
  • FIG. 13 is a partial equivalent circuit diagram of the antenna radiator provided by an embodiment of the application during operation.
  • the electronic device 100 may further include an inductance element 84 and a switch 85.
  • the inductance element 84 can be connected in series with the third elastic piece 83, and the switch 85 can be connected in parallel with the inductance element 84.
  • the switch 85 When the switch 85 is closed, the inductance element 84 is short-circuited by the switch 85, and the second ground terminal 43 is connected to the second ground point 76 through the third elastic piece 83. At this time, the second ground point 76, the second ground terminal 43, and the feeder The second radiation path 102 formed by the end 42, the feeding point 75, and the second radiation portion 72 and the third radiation portion 73 through the gap 77 to achieve electromagnetic coupling can radiate the radio frequency signal of the second frequency band.
  • the inductance element 84 When the switch 85 is turned off, the inductance element 84 is connected in series with the third elastic piece 83, and the second ground terminal 43 and the second ground point 76 are conducted through the inductance element 84 and the third elastic piece 83. At this time, the second ground point 76 and the The total inductance of the second radiation path 102 formed by the second grounding terminal 43, the feeding terminal 42, the feeding point 75, the second radiating portion 72 and the third radiating portion 73 through the gap 77 realizes electromagnetic coupling, and the second radiation path 102 It can radiate radio frequency signals in the fourth frequency band.
  • the fourth frequency band may be different from the second frequency band.
  • the fourth frequency band may be the Band40 (2300MHZ to 2400MHZ) frequency band of Long Term Evolution (LTE for short).
  • LTE Long Term Evolution
  • the first radiation path 101 can also be connected in series with an inductance element and a switch in parallel with the inductance element to achieve radiation of radio frequency signals different from the first frequency band.
  • the specific implementation manner refer to the manner of the aforementioned second radiation path, which will not be repeated here.
  • the antenna radiator 70 of the embodiment of the present application can be formed by using a 3D-MID process technology using a three-dimensional laser.
  • the antenna radiator 70 can adopt laser direct molding technology. First, the laser induces the modified material, and then the selective metal plating is directly formed on the substrate medium. The antenna radiator 70 does not need to occupy the internal space of the electronic device 100. Increasing the thickness of the electronic device 100 can realize a thinner and lighter design of the electronic device 100.
  • the antenna radiator 70 can also be formed on the substrate medium by other processes.
  • the antenna radiator 70 can be formed by laser activation technology, laser induced common materials, and then metal plating is selected to form the antenna radiator.
  • the antenna radiator 70 may adopt a patch antenna technology to paste and fix the antenna radiator 71 inside the electronic device 100.
  • the antenna radiator 70 can be fixed on the plastic bracket of the electronic device 100.
  • the plastic bracket refers to a bracket arranged between the battery 50, the circuit board 40 and the back cover 60 for fixing and carrying the battery 50 and the circuit board 40.
  • the antenna radiator 70 can be arranged on the outer surface of the side of the plastic bracket.
  • the distance between the antenna radiator 70 and the circuit board 40 is relatively moderate.
  • the feeding point 75, the first grounding point 74, and the second grounding point 76 are connected to the feeding terminal 42, the first grounding point, respectively.
  • the terminal 41 and the second ground terminal 43 are electrically connected, the wiring between the antenna radiator 70 and the circuit board 40 can be reduced, and the installation difficulty of the antenna radiator 70 can be reduced.
  • the antenna radiator 70 can also be fixed on other components of the electronic device 100, such as the inner surface of the plastic back cover 60 and the non-metallic part of the middle frame 30.
  • the embodiment of the present application does not limit the specific position of the antenna radiator 71.
  • the antenna radiator 70 may be provided with a clear area around the antenna radiator 70, that is, no metal components are provided in certain areas on the upper, lower, left, and right of the antenna radiator 70 to avoid metal The influence of components on the radio frequency performance of the antenna radiator 70.
  • the edge of the middle frame 30 of the electronic device 100 may be provided with a clearance area of 2 mm from the outer edge of the antenna radiator 70, and a clearance area of 4 mm may be provided between the circuit board 40 and the antenna radiator 70.
  • the electronic device 100 of the embodiment of the present application may also include multiple antenna radiators 70, and the multiple antenna radiators 70 may be located at different positions of the electronic device 100.
  • the circuit board 40 may be provided with multiple antenna radiators. Groups of radio frequency circuits, feed terminals and ground terminals, and further, when each group of antenna radiator 70 is electrically connected to the feed terminals, ground terminals and radio frequency circuits on the circuit board 40, it can radiate radio frequency signals of three frequency bands.
  • the antenna radiator 70 of the present application can form a multiple-input multiple-output (Multiple- Input Multiple-Output (MIMO for short) antenna combination, MIMO antenna combination of high and low frequency combination in cellular frequency band, and MIMO antenna combination of wifi frequency band.
  • MIMO Multiple- Input Multiple-Output
  • FIG. 14 is a schematic diagram of a third structure of an electronic device provided by an embodiment of this application.
  • the electronic device 100 of the embodiment of the present application may include four antenna radiators 70, and the four antenna radiators 70 may be arranged at four corners of the electronic device 100.
  • Each antenna radiator 70 can radiate radio frequency signals in the N41, N78, and N79 frequency bands.
  • the four antenna radiators 70 can form a 4 ⁇ 4 MIMO 5G antenna system covering the N41, N78, and N79 frequency bands.
  • the electronic device 100 of the embodiment of the present application may include four antenna radiators 70, and each antenna radiator 70 can radiate radio frequency signals in the GPS frequency band, the wifi 2.4 g frequency band, and the wifi 5 g frequency band, and further, the four antenna radiators 70 A 4 ⁇ 4 MIMO 5G antenna system covering GPS frequency band, wifi2.4g frequency band and wifi5g frequency band can be formed.
  • multiple antenna radiators 70 can also radiate radio frequency signals of different frequency bands.
  • one antenna radiator 70 can radiate radio frequency signals of N41, N78, and N79 bands, and another antenna radiator 70 can radiate GPS.
  • the radio frequency signal of the frequency band, the wifi2.4g frequency band, and the wifi5g frequency band, and further, the radio frequency signals of more frequency bands can be covered by multiple antenna radiators 70.

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Waveguide Aerials (AREA)
  • Support Of Aerials (AREA)

Abstract

L'invention concerne un élément rayonnant d'antenne et un dispositif électronique. L'élément rayonnant d'antenne comprend une première partie de rayonnement, une deuxième partie de rayonnement et une troisième partie de rayonnement qui sont reliées de manière séquentielle. La première partie de rayonnement est utilisée pour émettre un signal de radiofréquence d'une première bande de fréquence, la deuxième partie de rayonnement et la troisième partie de rayonnement réalisent un couplage électromagnétique au moyen d'un espace et sont utilisées pour émettre un signal de radiofréquence d'une deuxième bande de fréquence, et une structure annulaire formée par la deuxième partie de rayonnement et la troisième partie de rayonnement est utilisée pour émettre un signal de radiofréquence d'une troisième bande de fréquence.
PCT/CN2020/125428 2019-11-05 2020-10-30 Élément rayonnant d'antenne et dispositif électronique WO2021088736A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201911072552.2 2019-11-05
CN201921896214.6 2019-11-05
CN201911072552.2A CN112787077B (zh) 2019-11-05 2019-11-05 天线辐射体及电子设备
CN201921896214.6U CN210805993U (zh) 2019-11-05 2019-11-05 天线辐射体及电子设备

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