WO2022089089A1 - Antenne et dispositif terminal - Google Patents

Antenne et dispositif terminal Download PDF

Info

Publication number
WO2022089089A1
WO2022089089A1 PCT/CN2021/119058 CN2021119058W WO2022089089A1 WO 2022089089 A1 WO2022089089 A1 WO 2022089089A1 CN 2021119058 W CN2021119058 W CN 2021119058W WO 2022089089 A1 WO2022089089 A1 WO 2022089089A1
Authority
WO
WIPO (PCT)
Prior art keywords
radiator
antenna
slot
parasitic
parasitic branch
Prior art date
Application number
PCT/CN2021/119058
Other languages
English (en)
Chinese (zh)
Inventor
秦江弘
张琛
李肖峰
聂成成
张晓璐
Original Assignee
华为技术有限公司
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
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2022089089A1 publication Critical patent/WO2022089089A1/fr

Links

Images

Classifications

    • 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
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/10—Resonant antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/378—Combination of fed elements with parasitic elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole

Definitions

  • the present application relates to the field of wireless communication technologies, and in particular, to an antenna and a terminal device.
  • Wi-Fi Wireless Fidelity
  • CPE customer premises equipment
  • WLAN wireless local area network
  • Wi-Fi performance is one of the main performances of terminal equipment. Design an antenna that can achieve quasi-isotropy to increase the radiation coverage, improve the throughput efficiency in the vicinity of the original radiation null point (including the jump layer), and make the radiation performance in all directions flat. Improve the competitiveness of terminal equipment.
  • the gradient slot antenna 01 (also called gradient slot antenna) shown in FIG. 1 is an antenna structure commonly used in terminal equipment at present.
  • the antenna structure includes a plurality of antenna units 02.
  • Line 03 radiates electromagnetic energy away.
  • These multiple antenna units 02 are arranged in the circumferential direction (S direction as shown in FIG. 1 ) to compensate for the out-of-roundness of the directional pattern of the horizontal plane formed by the xoy shown in FIG. 2 to achieve omnidirectional coverage of the horizontal plane.
  • the gradient slot antennas shown in Figure 1 are all single-frequency antennas, which can only cover 2.4G or 5G bandwidth, and have no dual-frequency resonance characteristics, so they cannot achieve 2.4G and 5G dual-frequency characteristics in the state of common radiators.
  • the present application provides an antenna and a terminal device, and the main purpose is to provide an antenna that realizes 2.4G and 5G dual-frequency in the state of a common radiator.
  • the present application provides an antenna, the antenna includes: a dielectric plate, a radiator, a feeding network, a gradient groove and a first parasitic branch, the radiator and the feeding network are both formed on the surface of the dielectric plate, and the feeding
  • the electrical network is used for coupling and feeding the radiator;
  • the gradient slot is provided on the radiator;
  • the first parasitic branch is located in the gradient groove, one end of the first parasitic branch is connected to the radiator, and the other end extends toward the opening of the gradient groove;
  • the radiator and the first parasitic branch are capable of transmitting signals of a first frequency band and signals of a second frequency band different from the first frequency band.
  • a dipole antenna with current not only in the horizontal direction but also in the vertical direction is formed by forming a gradient groove on the radiator, in addition, by arranging a first parasitic branch in the gradient groove, and One end of the first parasitic branch is connected to the radiator, and the other end faces the opening of the gradual groove.
  • the first parasitic branch (may be called a vertical branch) and the radiator part of the radiator located on one side of the gradual groove (can be called as The horizontal branch) constitutes a dipole antenna, and then the radiator and the first parasitic branch can generate two fundamental modes, one is the 2.4G fundamental mode, and the other is the 5G fundamental mode.
  • the radiator of the antenna And the first parasitic branch can transmit the signal of the first frequency band (2.4G) and the signal of the second frequency band (5G) different from the first frequency band, compared with the existing antenna that can only realize 2.4G or 5G, this application implements
  • the antenna provided in the example realizes the dual-band coverage of the common radiator.
  • the feeding position of the radiator is set close to the narrowest part of the gradual change groove, and the first parasitic branch is set at the narrowest part of the gradual change groove. Since the feeding position is set at the narrowest part of the gradient groove, the radiation efficiency is improved.
  • the first parasitic branch is also set at the narrowest part of the gradual groove, that is, close to the feeding position, in this case, the first parasitic branch is The received coupling energy is relatively large, and better impedance matching can be achieved to modulate the 5G resonance.
  • the first parasitic branch and the radiator have an integral structure.
  • a radiator When forming a radiator on a dielectric plate, generally one side of the dielectric plate is electroplated with a metal layer, and then the metal layer is etched to form a radiator.
  • the manufacturing can be simplified. craft.
  • the pattern formed by the antenna in the first frequency band or the second frequency band has a null region
  • the antenna further includes a parasitic radiation structure
  • the parasitic radiation structure is arranged on the surface of the dielectric plate
  • the parasitic radiation structure generates The radiation can compensate for the zero point region.
  • the generated radiation can be compensated for the zero point area, so that the pattern is more complete and the antenna covers a larger area.
  • the parasitic radiation structure includes: a second parasitic branch, which is disposed on the surface of the dielectric plate and beside the radiator, and the extension direction of the second parasitic branch is consistent with the extension direction of the gradient groove, wherein , the length of the second parasitic branch is equal to half of the wavelength corresponding to the first frequency band. Since the pattern formed by the radiator under the 2.4G resonance generally has a null region on both sides, the null region can be compensated by arranging a second parasitic branch on the side of the radiator.
  • the radiator is located on the first surface of the dielectric plate
  • the second parasitic branch is located on the second surface of the dielectric plate
  • the first surface is opposite to the second surface
  • the second parasitic branch is located on the second surface of the dielectric plate.
  • a vertical projection on a surface is close to the side of the radiator.
  • the parasitic radiation structure includes a third parasitic branch, a third parasitic branch, which is disposed on the second surface of the dielectric plate, the radiator is located on the first surface of the dielectric plate, the first surface and the second surface Opposite; the radiator has a first slot at a position close to the gradient slot, and at least part of the vertical projection of the third parasitic stub on the first surface covers the first slot, wherein the length of the third parasitic stub is equal to the second One-half of the wavelength corresponding to the frequency band.
  • a third parasitic branch can be set to compensate for the upper Half of the zero point area.
  • the parasitic radiation structure includes a second slot, the second slot is opened on a side of the radiator away from the gradient slot, and the radiation generated by the second slot can compensate for the second frequency band The zero point region of the resulting pattern. Since the pattern formed by the radiator under 5G resonance generally has a zero point area in the lower half, and the feeding position is generally set close to the narrowest part of the gradient groove, in this case, a second slot can be set to compensate for the lower half part of the zero point area.
  • the opening of the second slot penetrates to the edge of the radiator, and the length of the second slot is equal to a quarter of the wavelength corresponding to the second slot in the second frequency band.
  • the opening of the second slot does not penetrate to the edge of the radiator, and the length of the second slot is equal to half of the wavelength corresponding to the second frequency band.
  • the radiator is located on the first surface of the dielectric board
  • the feeding network is located on the second surface of the dielectric board, and the first surface is opposite to the second surface;
  • the dielectric board has perforations, and the feed lines pass through The radiator and the feed network are electrically connected through the via holes.
  • a side surface of the radiator close to the gradual change groove has a first slot, and the extension direction of the first slot is perpendicular to the extension direction of the gradual change groove.
  • the present application further provides a terminal device, including the antenna in any implementation manner of the foregoing first aspect.
  • the terminal device provided by the embodiment of the present application includes the antenna of the embodiment of the first aspect, so the terminal device provided by the embodiment of the present application and the antenna of the above technical solution can solve the same technical problem and achieve the same expected effect.
  • the terminal device includes an antenna. In this way, multiple antennas are prevented from occupying a large space, especially for terminal equipment with miniaturized design.
  • FIG. 1 is a schematic structural diagram of an antenna in the prior art
  • Fig. 2 is the simulation schematic diagram of the orientation diagram of the structure shown in Fig. 1;
  • FIG. 3 is a schematic structural diagram of an antenna according to an embodiment of the present application.
  • Fig. 4 is the side view of Fig. 3;
  • Fig. 5a is a current distribution diagram of the antenna structure shown in Fig. 3;
  • Fig. 5b is a simulation schematic diagram of the pattern of the antenna structure shown in Fig. 3;
  • FIG. 6 is a schematic structural diagram of an antenna according to an embodiment of the present application.
  • Fig. 7a is a current distribution diagram of the antenna structure shown in Fig. 6;
  • Fig. 7b is a simulation schematic diagram of the pattern of the antenna structure shown in Fig. 6;
  • FIG. 8 is a schematic structural diagram of an antenna according to an embodiment of the present application.
  • Fig. 9a is a current distribution diagram of the antenna structure shown in Fig. 8.
  • Fig. 9b is a simulation schematic diagram of the pattern of the antenna structure shown in Fig. 8.
  • FIG. 10 is a schematic structural diagram of an antenna according to an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of an antenna according to an embodiment of the present application.
  • Fig. 12a is a current distribution diagram of the antenna structure shown in Fig. 11;
  • Fig. 12b is a simulation schematic diagram of the pattern of the antenna structure shown in Fig. 11;
  • FIG. 13 is a schematic structural diagram of an antenna according to an embodiment of the present application.
  • Fig. 14 is the rear view of Fig. 13;
  • Fig. 15 is a simulation schematic diagram of the pattern of the antenna structure shown in Fig. 13;
  • FIG. 16 is an S-parameter curve diagram of the antenna structure shown in FIG. 13;
  • FIG. 17 is a schematic structural diagram of an antenna according to an embodiment of the present application.
  • Fig. 18 is a simulation schematic diagram of the pattern of the antenna structure shown in Fig. 17;
  • FIG. 19 is an S-parameter curve diagram of the antenna structure shown in FIG. 17;
  • FIG. 20 is a schematic structural diagram of an antenna according to an embodiment of the present application.
  • Fig. 21a is a current distribution diagram of the antenna structure shown in Fig. 20 under 2.4G bandwidth;
  • Fig. 21b is a schematic simulation diagram of the pattern of the antenna structure shown in Fig. 20 under 2.4G bandwidth;
  • Fig. 22a is a current distribution diagram of the antenna structure shown in Fig. 20 under 5G bandwidth;
  • FIG. 22b is a schematic diagram of a simulation of the pattern of the antenna structure shown in FIG. 20 under 5G bandwidth;
  • FIG. 23 is an S-parameter curve diagram of the antenna structure shown in FIG. 20;
  • FIG. 24 is a directivity coefficient graph of the antenna structure shown in FIG. 20;
  • FIG. 25 is a gain curve diagram of the antenna structure shown in FIG. 20 .
  • WIFI Wireless fidelity
  • the working frequency band of the wifi antenna includes 2.4G (2.4GHz ⁇ 2.5GHz).
  • the antenna working in this frequency band can be called wifi 2.4G or 2.4G wifi.
  • the working frequency band also includes 5G (5.15GHz ⁇ 5.85GHz).
  • Antennas working in this frequency band can be called wifi 5G or 5G wifi.
  • Scattering (scatter) parameter also known as S-parameter, is an important parameter in microwave transmission.
  • Sij represents the energy injected from the j port and the energy measured at the i port.
  • S11 is the reflection coefficient of port 2 matching port 1.
  • S22 represents the reflection coefficient of port 2 when port 1 is matched.
  • S is generally expressed in decibels, between 0dB and negative infinity, the larger the absolute value, the better the match.
  • Directivity coefficient (Directionality) D reflects the characteristics of the concentrated radiated energy of the antenna. Since the antenna is directional, the radiated power density in the largest direction is several times that of the uniform radiation; in other words, compared with a non-directional antenna, using a directional antenna is equivalent to increasing the radiated power of the antenna by D times. Generally, the smaller the directivity coefficient, the better the antenna performance.
  • Omnidirectional out-of-roundness refers to the deviation of the maximum value from the minimum value in the pattern. Generally speaking, the smaller the omnidirectional out-of-roundness, the closer the pattern is to a circle, and the larger the antenna coverage.
  • the gain of the antenna describe the degree to which the antenna concentrates the input power and radiates, that is, the radiation effect in the maximum radiation direction.
  • the input power of the non-directional antenna should be G times the input power of the directional antenna. Therefore, using a high-gain antenna can increase the effective radiated power while maintaining the same input power.
  • the resonance of the antenna it is determined by the structure of the antenna and is an inherent characteristic. Near the resonance frequency of the antenna, the frequency band range that can make the electrical performance (such as return loss) meet the requirements of use can be called the bandwidth of the antenna.
  • the radiation efficiency of the antenna is used to measure the effectiveness of the antenna to convert high-frequency current or guided wave energy into radio wave energy. It is the ratio of the total power radiated by the antenna to the net power obtained by the antenna from the feeder. The radiation efficiency of the antenna is generally not Consider return loss.
  • the working frequency range (or frequency bandwidth) of the antenna it means that whether it is a transmitting antenna or a receiving antenna, it always works within a certain frequency range (frequency bandwidth).
  • the null area of the pattern In the pattern of the antenna, the area that is not radiated and the area with weak radiation intensity can be called the zero area.
  • An embodiment of the present application provides a terminal device.
  • the terminal device can send and receive signals through an antenna.
  • Terminal equipment may also be called terminal, also may be called user equipment (user equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, Mobile equipment, user terminal, wireless network equipment, user agent or user equipment.
  • user equipment user equipment
  • the terminal device can also be a cellular phone (cellular phone), a cordless phone, a session initiation protocol (SIP) phone, a smart phone (smart phone), a wireless local loop (WLL) station, a personal digital processor ( personal digital assistant, PDA), handheld devices with wireless communication capabilities, computing devices or other devices connected to wireless modems, in-vehicle devices, wearable devices, drone devices or the Internet of Things, terminals in the Internet of Vehicles, and future networks Any form of terminal, relay user equipment, or a terminal in a future evolved public land mobile network (PLMN), etc.
  • PLMN public land mobile network
  • the antenna provided in the above-mentioned terminal equipment will be described in detail below.
  • FIG. 3 shows a schematic structural diagram of an antenna
  • FIG. 4 is a side view of FIG. 3.
  • the antenna includes a dielectric plate 1, a radiator 2 and a feeding network 5. Both the radiator 2 and the feeding network 5 are formed in the dielectric On the surface of the panel 1 , wherein the feed network 5 is used to couple the feed to the radiator 2 .
  • a metal layer is generally first formed on the surface of the dielectric plate 1 (for example, a metal layer is formed by electroplating), and then the metal layer is etched to form the radiator 2 and the feeding network.
  • Electric Network 5 a metal layer is generally first formed on the surface of the dielectric plate 1 (for example, a metal layer is formed by electroplating), and then the metal layer is etched to form the radiator 2 and the feeding network. Electric Network 5.
  • the radiator 2 and the feed network 5 may be located on the same surface of the dielectric plate 1 .
  • the radiator 2 and the feeding network 5 may also be located on two opposite surfaces of the dielectric plate 1 , for example, as shown in FIG. 4 , the dielectric plate 1 has opposite first surfaces A1 and the second surface A2, the radiator 2 is located on the first surface A1, and the feeding network 5 is located on the second surface A2.
  • the second surface A2 can be fully used to set the feeding network 5, so as to avoid increasing the size of the dielectric plate 1 when the feeding network 5 and the radiator 2 are arranged on the same surface .
  • radiator 2 and the feeding network 5 are arranged in the manner shown in FIG. 4 , with reference to FIG. 4 , a hole is opened on the radiator 2 , and the hole passes through the dielectric plate 1 to the feeding network 5 , and the feeder 11 passes through the hole
  • the radiator 2 and the feeding network 5 are electrically connected.
  • the radiator 2 is provided with a gradient groove 3 .
  • the radiator 2 has a first end portion B1 and a second end portion B2 opposite to the first end portion B1.
  • a slot is formed from the first end portion B1 to the second end portion B2, and the slot does not pass through.
  • the groove is a gradual groove, that is, along the direction of the first end B1 towards the second end B2, the size of the notch d gradually decreases.
  • the radiator 2 forms a first dipole arm located on the left side of the gradient slot 3, a second dipole arm located on the right side of the gradient slot 3, and the first dipole arm and the first dipole arm are formed.
  • Both dipole arms extend in the x and y directions. Furthermore, the current intensity in the x-direction and the y-direction can be balanced, so that the antenna can be radiated in both the x-direction and the y-direction, thereby reducing the directivity coefficient of the antenna.
  • the gradient slot 3 involved in this application can be a linear gradient slot, and the antenna formed in this way can be called a linear gradient slot antenna (Lineraly Tapered Slot Antenna, LTSA), and the gradient slot 3 can also be an exponential gradient slot,
  • the antenna thus formed may be referred to as an exponentially graded planar slot antenna (Vivaldi antenna).
  • the present application does not specifically limit the gradient form of the gradient groove.
  • the diameter of the gradient groove 3 may be increased, that is, the dimension d in FIG. 3 may be increased.
  • the antenna including the radiator 2 can transmit signals in the first frequency band, for example, can generate 2.4G resonance for transmitting signals in the 2.4G frequency band.
  • FIG. 5a is a current distribution diagram on the radiator 2 when the antenna structure shown in FIG. 3 is fed. It can be seen from Fig. 5a that the formed dipole antenna has current not only in the x-direction but also in the y-direction (the thicker black line with arrows in the figure represents the flow of the current).
  • Fig. 5b is a schematic diagram of the simulation of the directional diagram of the structure shown in Fig. 5a. It can be seen from Fig. 5b that the omnidirectional out-of-roundness of the directional diagram is relatively large, and there are null regions on both sides of the antenna.
  • the present application provides an antenna with another structure.
  • the side of the radiator 2 close to the gradient groove 3 Has a first slot 8 .
  • the plurality of first grooves 8 can also be provided in the opening manner shown in FIG. 6 , that is, the extending direction of the first grooves 8 is perpendicular to the extending direction of the gradient groove 3 (the P direction shown in FIG. 6 ).
  • the included angle between the extending direction of the plurality of first slots 8 and the extending direction of the gradient groove 3 may also be in other ranges.
  • the shape of the first slot 8 is not limited in the present application, and an example may be a nearly rectangular structure as shown in FIG. 6 .
  • Fig. 7a is a current distribution diagram on the radiator when the antenna is fed with the radiator 2 and the first slot 8 shown in Fig. 6 . It can be seen from Fig. 7a that the formed dipole antenna not only has current in the x direction, but also has current in the y direction. And, compared with Fig. 5a, the current along the y-direction is bound on the vertical branch 12 of the radiator 2 close to the first slot 8, that is, the vertical branch 12 has a larger current intensity.
  • Fig. 7b is a schematic diagram of the simulation of the pattern of the structure shown in Fig. 7a. Compared with Fig. 5b, the null area on both sides of the antenna is reduced, and the omnidirectional out-of-roundness of the pattern is reduced.
  • the function of the first slot 8 can change the current distribution, reduce the horizontal current intensity, increase the current in the vertical direction, balance the current distribution, reduce the directivity coefficient, and further improve the omnidirectional out-of-roundness.
  • both sides of the antenna have null regions, so as shown in FIG. 6 , first slots are provided on both sides of the radiator 2 close to the gradient slot 3 . If in FIG. 5b , there is only a null region on one side of the antenna, then the first slot is only provided on the corresponding side of the radiator 2 that is close to the gradient groove 3 .
  • the present application provides an antenna with another structure, as shown in FIG. 8, in addition to the radiator 2 and the first slot 8, it also includes a second parasitic branch 6, and the length L1 of the second parasitic branch 6 is equal to half of the wavelength corresponding to the first frequency band (2.4G), and the extending direction of the second parasitic branch 6 is consistent with the extending direction of the gradient groove. It can be seen from FIG. 7b that there are null regions on both sides of the antenna, so, as shown in FIG. 8 , second parasitic branches 6 are respectively provided on both sides of the radiator 2 .
  • the above-mentioned length L1 of the second parasitic branch 6 is equal to one-half of the wavelength corresponding to 2.4G means that the length L1 of the second parasitic branch 6 is completely equal to one-half of the wavelength corresponding to 2.4G, or , the length L1 of the second parasitic branch 6 is approximately equal to half of the wavelength corresponding to 2.4G.
  • the second parasitic branch 6 is provided on the first surface of the dielectric plate 1 . In some other alternative embodiments, the second parasitic branch 6 is arranged on the second surface of the dielectric plate 1 , and the vertical projection on the first surface is located beside the radiator 2 .
  • Fig. 9a shows the current on the radiator and the second parasitic branch 6 when the antenna of the structure is fed, including the radiator 2, the first slot 8, and the second parasitic branch 6 shown in Fig. 8 Distribution. It can be seen from Fig. 9a that the formed dipole antenna has current not only in the x-direction but also in the y-direction. Also, there is a larger current intensity on the second parasitic branch 6 compared to Fig. 7a.
  • Fig. 9b is a schematic diagram of the simulation of the pattern of the structure shown in Fig. 9a. Compared with Fig. 7b, the null area on both sides of the antenna is further reduced, and the omnidirectional out-of-roundness of the pattern is further reduced, and basically no There is a zero point area.
  • Table 1 is a comparison of the performance parameters of the antennas with three different structures in Fig. 3, Fig. 6 and Fig. 8. It is known from the data in Table 1: when the antenna includes a radiator and a first slot, and only includes radiation Compared with the body, the resonant frequency can be modulated to 2.4G, the directivity coefficient is also reduced, the omnidirectional out-of-roundness is also reduced, and the coverage area is expanded.
  • the directivity coefficient is further reduced compared with the radiator and the first slot, and the coupling current of the increased second parasitic branch can compensate the antenna
  • the omnidirectional out-of-roundness is further reduced, that is, the coverage area is further expanded, and the antenna performance is further optimized. In this way, the quasi-isotropic radiation characteristics of the antenna at 2.4G can be achieved.
  • the above-mentioned antennas shown in FIG. 3 , FIG. 6 and FIG. 8 can cover the 2.4G bandwidth and transmit 2.4G signals.
  • the embodiments of the present application also provide antennas with several structures, as described below.
  • Figure 10 shows an antenna that can realize dual-frequency co-radiators.
  • the antenna includes a dielectric plate 1, a radiator 2 located on the surface of the dielectric plate 1, and a feeding network 5, as well as a first parasitic branch 4.
  • the first parasitic branch 4 is located in the gradient groove 3 , one end of the first parasitic branch 4 is connected to the radiator 2 , and the other end extends toward the opening of the gradient groove 3 .
  • the first parasitic branch 4 in the figure can form a vertical branch
  • the part marked with the serial number 13 of the radiator 3 forms a horizontal branch
  • the vertical branch and the horizontal branch 13 constitute a dipole antenna, forming a 5G resonant base. mold.
  • one end of the first parasitic branch 4 is extended toward the opening direction of the gradient groove 3, so that the radiation direction of the antenna in the 2.4G bandwidth can be substantially consistent with the radiation direction in the 5G bandwidth.
  • the radiator 2 is obtained by first electroplating the metal layer and then etching the metal layer, the first parasitic branch 4 and the radiator 2 can be integrally formed, thus simplifying the entire antenna manufacturing process.
  • the feeding position of the radiator 2 is set close to the narrowest part of the gradual change groove 3.
  • the connection between the first parasitic branch 4 and the radiator 2 can be set close to the feeding position Setting, in this case, the current of the first parasitic branch 4 is stronger, and the received coupling energy is also larger, and the best impedance matching can be achieved to modulate the 5G resonance.
  • FIG. 11 shows another antenna that realizes dual frequencies of a common radiator. Compared with FIG. 10 , the first slot 8 is also included.
  • Fig. 12a is a diagram of the current distribution on the radiator when the antenna of this structure is fed, including the radiator 2, the first slot 8, and the first parasitic branch 4 shown in Fig. 11 . It can be seen from Fig. 12a that the formed dipole antenna has current not only in the x-direction but also in the y-direction.
  • Fig. 12b is a schematic diagram of the simulation of the directional diagram of the structure shown in Fig. 12a. It can be seen from Fig. 12b that there are four corners of the directional diagram (Q1, Q2, Q3 and Q4 in the figure). Zero area.
  • the present application also provides an antenna, as shown in FIG. 13 and FIG. 14 , the antenna includes a dielectric plate 1 and is located on the dielectric plate 1.
  • the antenna includes a dielectric plate 1 and is located on the dielectric plate 1.
  • it also includes a third feeding branch 7.
  • the length L2 of the third parasitic branch 7 is equal to two times the wavelength corresponding to the second frequency band (5G). one part.
  • the third feeding branch 7 is located on the second surface A2 of the dielectric plate 1 , and at least part of the vertical projection of the third parasitic branch 7 on the first surface A1 of the dielectric plate 1 covers the first slot 8 .
  • the above-mentioned length L2 of the third parasitic branch 7 is equal to one-half of the wavelength corresponding to the second frequency band (5G), which means that the length L2 of the third parasitic branch 7 is completely equal to half of the wavelength corresponding to 5G. 1/2, or the length L2 of the third parasitic branch 7 is approximately equal to 1/2 of the wavelength corresponding to 5G.
  • the third parasitic stub 7 can be provided with clearance so that the electromagnetic waves of the third parasitic stub 7 can be radiated.
  • a new radiation mode and a new resonance can be generated in the range of 5.1G to 5.3G to utilize the radiation of the third parasitic branch 7 to compensate the null region of the upper half of the pattern.
  • the position and rotation direction of the third parasitic branch 7 shown in FIG. 13 and FIG. 14 are only an example. During specific implementation, the position of the third parasitic branch 7 can be adjusted according to the position of the zero point area of the directional diagram. and rotation direction.
  • the third parasitic branch 7 has two, one is arranged on the left side of the gradient groove 3, and the other is arranged on the right side of the gradient groove 3. side.
  • Fig. 15 is a schematic diagram of the simulation of the pattern of the structure shown in Fig. 13. It can be seen from Fig. 15 that the zero point areas at Q1 and Q2 are both compensated, and the omnidirectional out-of-roundness is further reduced. Compared with Fig. 12b, the coverage of the antenna The scope is further expanded.
  • Figure 16 is a comparison diagram of the S-parameter curve of the antenna when the third parasitic branch 7 is included and the S-parameter curve of the antenna when the third parasitic branch 7 is not included.
  • the absolute value of the S parameter increases significantly, thereby optimizing the antenna performance.
  • the present application also provides an antenna, as shown in FIG.
  • a second slot 10 is further included, and the second slot 10 is opened on the side of the radiator 2 away from the gradual change slot 3,
  • the two slots 10 penetrate to the edge of the radiator 2, and the length L3 of the second slot 10 is equal to a quarter of the wavelength corresponding to the second frequency band (5G).
  • the second slot 10 does not penetrate to the edge of the radiator 2, and the length of the second slot 10 is equal to half of the wavelength corresponding to the second frequency band (5G).
  • the length of the second slot 10 is equal to a quarter of the wavelength corresponding to the second frequency band (5G) means: the second slot The length of 10 is exactly equal to a quarter of the wavelength corresponding to 5G, or the length of the second slot 10 is nearly equal to a quarter of the wavelength corresponding to 5G.
  • the length of the second slot 10 is equal to half of the wavelength corresponding to the second frequency band (5G) means: the length of the second slot 10 is completely It is equal to one-half of the wavelength corresponding to 5G, or the length of the second slot 10 is approximately equal to one-half of the wavelength corresponding to 5G.
  • a new radiation mode and a new resonance can be generated in the range of 5.1G to 5.3G to utilize the radiation of the second slot 10 to compensate the zero point region of the lower half of the pattern.
  • the position and opening direction of the second slot 10 shown in FIG. 17 is only an example. During implementation, the position and opening direction of the second slot 10 can be adjusted according to the zero point area of the directional diagram.
  • Q3 and Q4 are both zero-point regions. Therefore, with reference to FIG. 17 , there are two second slots 10 , one is arranged on the left side of the radiator 2 and the other is arranged on the right side of the radiator 2 side. If there is a zero point region only at Q3 or Q4, then the second slot 10 is opened only on one side of the radiator.
  • Fig. 18 is a schematic diagram of the simulation of the pattern of the structure shown in Fig. 17. It can be seen from Fig. 18 that the zero point areas at Q3 and Q4 are both compensated, and the omnidirectional out-of-roundness is further reduced. Compared with Fig. 12b, the coverage of the antenna The scope is further expanded.
  • FIG. 19 is a comparison diagram of the S-parameter curve of the antenna including the second slot and the S-parameter curve of the antenna without the second slot. It can be seen from the figure that within the 5G bandwidth range, the second slot has When , the absolute value of the S-parameter increases significantly, so that the antenna performance can be optimized.
  • the antenna includes a dielectric plate 1, a radiator 2 disposed on the surface of the dielectric plate 1, and a feeding network 5.
  • the radiator 2 is provided with a gradient groove 3 , also includes a first slot 8 formed on the radiator 2 and close to the gradual change groove 3, a first parasitic branch 4 located in the gradual change groove 3 and connected to the radiator 2, and a second parasitic branch located beside the radiator 2
  • the branch 6 , and the second slot 10 formed on the radiator 2 , and the third parasitic branch 7 are examples of another antenna provided by an embodiment of the present application.
  • the antenna includes a dielectric plate 1, a radiator 2 disposed on the surface of the dielectric plate 1, and a feeding network 5.
  • the radiator 2 is provided with a gradient groove 3 , also includes a first slot 8 formed on the radiator 2 and close to the gradual change groove 3, a first parasitic branch 4 located in the gradual change groove 3 and connected to the radiator 2, and a second parasitic branch located beside the radiator 2
  • the radiator 2 is also provided with a slot 9 , and the slot 9 communicates with the gradient slot 3 .
  • Fig. 21a is a current distribution diagram of the antenna shown in Fig. 20 under 2.4G bandwidth.
  • Fig. 21b is a schematic diagram of the simulation of the pattern of the antenna shown in Fig. 20 under the 2.4G bandwidth. It can be seen from Fig. 21b that under the 2.4G bandwidth, the quasi-isotropic radiation effect can be achieved.
  • the radiation pattern including the first slot 8 and the radiation pattern including the second parasitic branch 6 can be superimposed, so that the compensation of the antenna radiation performance can be realized, and further, under the 2.4G bandwidth, the radiation pattern of the antenna can be compensated.
  • Quasi-isotropic radiation that is, to achieve isotropic radiation under the 2.4G bandwidth.
  • Fig. 22a is a current distribution diagram of the antenna shown in Fig. 20 under 5G bandwidth.
  • Figure 22b is a schematic diagram of the simulation of the pattern of the antenna shown in Figure 20 under the 5G bandwidth. It can be seen from Figure 22b that the quasi-isotropic radiation effect can also be basically achieved under the 5G bandwidth. Under the bandwidth, the radiation is isotropic.
  • the radiation pattern including the third parasitic branch 7 and the radiation pattern including the second slot 10 can be superimposed, so as to realize the compensation of the antenna radiation performance, and then realize the quasi-isotropic under the 5G bandwidth. Same-sex radiation.
  • FIG. 23 is the S-parameter curve of the antenna structure shown in FIG. 20
  • FIG. 24 is the directivity coefficient curve of the antenna structure shown in FIG. 20
  • FIG. 25 is the gain curve of the antenna structure shown in FIG. 20 .
  • the antenna of this structure can achieve dual-frequency (2.4G and 5G) omnidirectional radiation characteristics, and also meet the quasi-isotropic radiation characteristics, There is no obvious radiation zero point area, and the omnidirectional out-of-roundness is less than 6dB in the vast frequency range. In addition, the directivity coefficient is also small, achieving high radiation efficiency and low gain radiation.
  • the second parasitic branch 6, the third parasitic branch 7 and the second slot 10 described above all belong to the parasitic radiation structure, in order to compensate the zero point region of the pattern.
  • parasitic branches or parasitic gaps may also be set at corresponding positions of the radiator to compensate for the null regions.
  • This application does not specifically limit the structure of the feeding network 5, and an inverted L-shaped structure can be used, and the structure shown in FIG. 20 is not limited. If a feed network with an inverted L-shaped structure is used, the length and width of the inverted L-shaped structure can be changed to adjust the impedance matching and optimize the antenna performance.
  • the directivity coefficient of the dual-band Wi-Fi antenna can be reduced, and the radiation characteristics of high efficiency and low gain can be realized. In this way, the size occupied by the antenna can be reduced.

Landscapes

  • Waveguide Aerials (AREA)
  • Details Of Aerials (AREA)

Abstract

La présente invention se rapporte au domaine technique des communications sans fil, et concerne une antenne et un dispositif terminal. L'antenne comprend une plaque diélectrique, un radiateur, un réseau d'alimentation, une fente effilée et un premier noeud de ramification parasite. Le radiateur et le réseau d'alimentation sont formés sur la surface de la plaque diélectrique, et le réseau d'alimentation est utilisé pour l'alimentation couplée du radiateur. La fente conique est formée sur le radiateur. Le premier noeud de ramification parasite est situé dans la fente effilée, une extrémité du premier noeud de branche parasite est reliée au radiateur, et l'autre extrémité de celui-ci s'étend jusqu'à la direction d'ouverture de la fente effilée. Le radiateur et le premier noeud de branche parasite peuvent transmettre un signal d'une première bande de fréquence et un signal d'une seconde bande de fréquence qui est différent de la première bande de fréquence.
PCT/CN2021/119058 2020-10-27 2021-09-17 Antenne et dispositif terminal WO2022089089A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202011166804.0 2020-10-27
CN202011166804.0A CN114498006B (zh) 2020-10-27 2020-10-27 一种天线及终端设备

Publications (1)

Publication Number Publication Date
WO2022089089A1 true WO2022089089A1 (fr) 2022-05-05

Family

ID=81381872

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/119058 WO2022089089A1 (fr) 2020-10-27 2021-09-17 Antenne et dispositif terminal

Country Status (2)

Country Link
CN (1) CN114498006B (fr)
WO (1) WO2022089089A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115621717A (zh) * 2022-11-28 2023-01-17 小米汽车科技有限公司 辐射体、天线单元、天线组件、车辆和布置方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115513645B (zh) * 2022-10-10 2024-10-11 Oppo广东移动通信有限公司 一种电子设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105024172A (zh) * 2015-08-11 2015-11-04 中国电子科技集团公司第五十四研究所 加载脊喇叭相控阵天线单元
CN109149098A (zh) * 2018-10-10 2019-01-04 江苏中科智睿物联网科技有限公司 一种极宽带印刷单极天线
US20190260131A1 (en) * 2018-02-17 2019-08-22 Fractal Antenna Systems, Inc. Vivaldi horn antennas incorporating fps
CN111555025A (zh) * 2020-06-04 2020-08-18 西安光启尖端技术研究院 缝隙天线

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140043195A1 (en) * 2010-08-26 2014-02-13 Jaybeam Uk Device and method for controlling azimuth beamwidth across a wide frequency range
CN103107419A (zh) * 2013-01-30 2013-05-15 南京邮电大学 锯齿状馈电结构的组合双频宽带天线
CN105552553A (zh) * 2015-12-07 2016-05-04 华南理工大学 一种小型三频四单元mimo天线
CN205811043U (zh) * 2016-07-06 2016-12-14 吉林医药学院 一种m形三频带平面印刷单极天线
TWI697152B (zh) * 2019-02-26 2020-06-21 啓碁科技股份有限公司 行動裝置和天線結構
CN211578966U (zh) * 2020-03-02 2020-09-25 普联技术有限公司 渐变缝隙天线及通讯装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105024172A (zh) * 2015-08-11 2015-11-04 中国电子科技集团公司第五十四研究所 加载脊喇叭相控阵天线单元
US20190260131A1 (en) * 2018-02-17 2019-08-22 Fractal Antenna Systems, Inc. Vivaldi horn antennas incorporating fps
CN109149098A (zh) * 2018-10-10 2019-01-04 江苏中科智睿物联网科技有限公司 一种极宽带印刷单极天线
CN111555025A (zh) * 2020-06-04 2020-08-18 西安光启尖端技术研究院 缝隙天线

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DING XIAOXIANG; ZHAO ZHIQIN; YANG YAOHUI; NIE ZAIPING; LIU QING HUO: "A Compact Unidirectional Ultra-Wideband Circularly Polarized Antenna Based on Crossed Tapered Slot Radiation Elements", IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, IEEE, USA, vol. 66, no. 12, 1 December 2018 (2018-12-01), USA, pages 7353 - 7358, XP011702319, ISSN: 0018-926X, DOI: 10.1109/TAP.2018.2867059 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115621717A (zh) * 2022-11-28 2023-01-17 小米汽车科技有限公司 辐射体、天线单元、天线组件、车辆和布置方法

Also Published As

Publication number Publication date
CN114498006B (zh) 2023-06-27
CN114498006A (zh) 2022-05-13

Similar Documents

Publication Publication Date Title
CN205811043U (zh) 一种m形三频带平面印刷单极天线
US20220255240A1 (en) Antenna module and electronic device
US7782257B2 (en) Multi-band internal antenna of symmetry structure having stub
Ding et al. Design of a multiband quasi-Yagi-type antenna with CPW-to-CPS transition
US7589686B2 (en) Small ultra wideband antenna having unidirectional radiation pattern
WO2021238347A1 (fr) Antenne et dispositif électronique
Parchin et al. Small-size tapered slot antenna (TSA) design for use in 5G phased array applications
JP5143911B2 (ja) セルラー基地局アンテナ用二偏波放射エレメント
WO2021022941A1 (fr) Réseau d'antenne et terminal
WO2022089089A1 (fr) Antenne et dispositif terminal
CN105305055A (zh) 一种超宽带双圆环形平面单极天线
WO2019223318A1 (fr) Station de base intérieure et antenne pifa associée
US20150061953A1 (en) Antenna and Electronic Device
Wong et al. Broadband dual-polarization and stable-beamwidth slot antenna fed by U-shape microstrip line
CN205248439U (zh) 一种超宽带双圆环形平面单极天线
Rezaeieh et al. Miniaturized planar Yagi antenna utilizing capacitively coupled folded reflector
Ren et al. Large frequency ratio vivaldi antenna system with low-frequency gain enhancement utilizing dual-function taper slot
US20230216194A1 (en) Miniaturized multifunctional ultrawideband antenna system
CN105552536B (zh) 一种单极子双频带WLAN/WiMAX天线
Elabd et al. Low mutual coupling miniaturized dual-band quad-port MIMO antenna array using decoupling structure for 5G smartphones
WO2019227651A1 (fr) Terminal de communication portable et antenne pifa associée
Kundu et al. Planar inverted F antenna, PIFA array in 5G applications
WO2022134785A1 (fr) Antenne et dispositif de communication
CN107994332A (zh) 一种三频微带缝隙天线
Su Printed loop antenna integrated into a compact, outdoor WLAN access point with dual-polarized radiation

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21884819

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21884819

Country of ref document: EP

Kind code of ref document: A1