Nothing Special   »   [go: up one dir, main page]

WO2016206181A1 - 天线及用户设备 - Google Patents

天线及用户设备 Download PDF

Info

Publication number
WO2016206181A1
WO2016206181A1 PCT/CN2015/087832 CN2015087832W WO2016206181A1 WO 2016206181 A1 WO2016206181 A1 WO 2016206181A1 CN 2015087832 W CN2015087832 W CN 2015087832W WO 2016206181 A1 WO2016206181 A1 WO 2016206181A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
matching circuit
unit
branch unit
metal frame
Prior art date
Application number
PCT/CN2015/087832
Other languages
English (en)
French (fr)
Inventor
程孝奇
Original Assignee
中兴通讯股份有限公司
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 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to US15/738,130 priority Critical patent/US20180183138A1/en
Priority to EP15896076.5A priority patent/EP3300170B1/en
Publication of WO2016206181A1 publication Critical patent/WO2016206181A1/zh

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • 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
    • 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
    • H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
    • 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
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H04M1/0277—Details of the structure or mounting of specific components for a printed circuit board assembly
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/0279—Improving the user comfort or ergonomics
    • H04M1/0283—Improving the user comfort or ergonomics for providing a decorative aspect, e.g. customization of casings, exchangeable faceplate
    • 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
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
    • H01Q5/335—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors at the feed, e.g. for impedance matching
    • 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
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364—Creating multiple current paths
    • H01Q5/371—Branching current paths

Definitions

  • the present invention relates to the field of communications, and in particular to an antenna and user equipment.
  • LTE Long Term Evolution
  • the present invention provides an antenna and a user equipment.
  • an antenna comprising: a motherboard printed circuit board (PCB) 1, a metal frame 2, an antenna radiating unit 3, a first feeding branch unit 31, and a second feeding branch unit 32. , the grounding element 4, the feeding point 7 and the clearance area 8, wherein
  • the main board PCB1 is connected to the metal frame 2 through the grounding element 4;
  • the antenna radiating unit 3 is disposed in the clearance area 8 on the upper side of the main board PCB1;
  • the metal frame 2 and the antenna radiating unit 3 are disposed on the periphery of the user equipment to form a frame of the user equipment, and the first gap 21 and the second gap are disposed between the metal frame 2 and the antenna radiating unit 3 Slot 22;
  • the feed point 7 is connected to the antenna radiating element 3 via a first feed branch unit 31 and a second feed branch unit 32, respectively.
  • the antenna further includes: a first matching circuit 5 and a second matching circuit 6, wherein the first matching circuit 5 and the second matching circuit 6 are disposed on the main board PCB1; One end of the matching circuit 5 passes through the first feed
  • the branch unit 31 is connected to the antenna radiating unit 3, and the other end of the first matching circuit 5 is respectively connected to the second matching circuit 6 and the feeding point 7; one end of the second matching circuit 6
  • the second feeding circuit unit 32 is connected to the antenna radiating unit 3, and the other end of the second matching circuit 6 is connected to the first matching circuit 5 and the feeding point 7, respectively.
  • the main board PCB1 includes: a dielectric substrate 11 and a metal ground 12 formed by a metal-clad area on the back surface of the dielectric substrate 11, wherein
  • the metal ground 12 is connected to the metal frame 2 through the grounding element 4;
  • the first matching circuit 5 and the second matching circuit 6 are disposed on the dielectric substrate 11.
  • the metal frame 2 and the antenna radiating unit 31 are both symmetrical U-shaped structures; the gaps of the first slot 21 and the second slot 22 are the same size, and the first slot 21 and the The second slot 22 is symmetrically disposed on both sides of the frame of the user equipment.
  • the first feed branch unit 31 is connected to the antenna radiating unit 3 at a central position inside the U-shaped structure of the antenna radiating unit 3; the second feeding branch unit 32 is at the antenna radiating unit 3 One side of the center position inside the U-shaped structure is connected to the antenna radiating unit 3, wherein
  • the first feeding branch unit 31 is in the form of a microstrip straight line and is arranged to control the low frequency portion;
  • the second feed branch unit 32 is in the form of a microstrip gradient line and is arranged to control the high frequency portion.
  • the low frequency portion includes: 698 MHz to 960 MHz
  • the high frequency portion includes: 1710 MHz to 2690 MHz.
  • the second feed branch unit 32 is in the form of a trapezoidal microstrip line.
  • the first matching circuit 5 is set to low pass filtering; the second matching circuit 6 is set to high pass filtering.
  • the first matching circuit 5 and the second matching circuit 6 are composed of a lumped element capacitance and an inductance.
  • a user equipment comprising: the antenna described above.
  • the antenna adopted by the present invention includes a main board PCB1, a metal frame 2, an antenna radiating unit 3, a first feeding branch unit 31, a second feeding branch unit 32, a grounding element 4, a feeding point 7, and a clearance area.
  • the main board PCB1 is connected to the metal frame 2 through the grounding member 4; the antenna radiating unit 3 is disposed in the clearance area 8 on the upper side of the main board PCB1; the metal frame 2 and the antenna radiating unit 3 are disposed around the user equipment to form a user equipment.
  • a first frame 21 and a second slot 22 are disposed between the metal frame 2 and the antenna radiating unit 3; the feeding point 7 passes through the first feeding branch unit 31 and the second feeding branch unit 32, respectively.
  • the manner in which the antenna radiating unit 3 is connected solves the problem that the antenna occupies a large space and reduces the volume occupied by the antenna.
  • FIG. 1 is a schematic structural diagram of an antenna according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a preferred structure of an antenna according to an embodiment of the present invention.
  • FIG. 3 is a simulation curve of return loss according to the antenna shown in FIG. 1;
  • FIG. 4 is a schematic structural diagram of a first matching circuit of the antenna shown in FIG. 2;
  • FIG. 5 is a schematic structural diagram of a second matching circuit according to the antenna shown in FIG. 2;
  • FIG. 5 is a schematic structural diagram of a second matching circuit according to the antenna shown in FIG. 2;
  • Fig. 6 is a graph showing a return loss simulation of the antenna shown in Fig. 2.
  • FIG. 1 is a schematic structural diagram of an antenna according to an embodiment of the present invention.
  • the antenna includes: a printed circuit board (PCB), and a metal.
  • a frame 2 an antenna radiating unit 3, a first feeding branch unit 31, a second feeding branch unit 32, a grounding element 4, a feeding point 7, and a clearance area 8, wherein
  • the main board PCB1 is connected to the metal frame 2 through the grounding member 4;
  • the antenna radiating unit 3 is disposed in the clearance area 8 on the upper side of the main board PCB1;
  • the metal frame 2 and the antenna radiating unit 3 are disposed on the periphery of the user equipment, forming a frame of the user equipment, and a first slot 21 and a second slot 22 are disposed between the metal frame 2 and the antenna radiating unit 3;
  • the feed point 7 is connected to the antenna radiating element 3 via a first feed branch unit 31 and a second feed branch unit 32, respectively.
  • the manner in which the two feed branch units are respectively connected to the antenna radiating unit 3 is adopted, so that a sufficient wide frequency can be obtained without using an additional tuning switch.
  • the problem that the antenna occupies a large space is solved, and the volume occupied by the antenna is reduced.
  • the user equipment includes: a device integrated with an antenna, such as a mobile phone or a tablet computer.
  • the antenna further includes a first matching circuit 5 and a second matching circuit 6, wherein the first matching circuit 5 and the second The matching circuit 6 is disposed on the main board PCB1; one end of the first matching circuit 5 is connected to the antenna radiating unit 3 through the first feeding branch unit 31, and the other end of the first matching circuit 5 and the second matching circuit 6 and the feeding respectively Point 7 is connected; one end of the second matching circuit 6 is connected to the antenna radiating unit 3 through the second feeding branch unit 32, and the other end of the second matching circuit 6 is connected to the first matching circuit 5 and the feeding point 7, respectively.
  • the main board PCB1 includes: a dielectric substrate 11 and a metal ground 12 composed of a metal-clad region on the back surface of the dielectric substrate 11, wherein the metal ground 12 is connected to the metal frame 2 through the grounding member 4; the first matching circuit 5 and the second matching The circuit 6 is disposed on the dielectric substrate 11.
  • the metal frame 2 and the antenna radiating unit 31 are both symmetrical U-shaped structures; the gaps of the first slot 21 and the second slot 22 are the same in size, and the first slot 21 and the second slot 22 are on both sides of the frame of the user equipment. Symmetrical settings.
  • the first feed branch unit 31 is connected to the antenna radiating unit 3 at a center position inside the U-shaped structure of the antenna radiating unit 3; the second feeding branch unit 32 is inside the U-shaped structure of the antenna radiating unit 3 One side of the center position is connected to the antenna radiating unit 3, wherein the first feeding branch unit 31 is in the form of a microstrip straight line and is arranged to control the low frequency portion; the second feeding branch unit 32 is in the form of a microstrip gradient line. To control the high frequency part.
  • the low frequency portion includes: 698 MHz to 960 MHz
  • the high frequency portion includes: 1710 MHz to 2690 MHz.
  • the second feed branch unit 32 takes the form of a trapezoidal microstrip line.
  • the first matching circuit 5 is set to low pass filtering; the second matching circuit 6 is set to high pass filtering.
  • the first matching circuit 5 and the second matching circuit 6 are composed of a lumped element capacitance and an inductance.
  • the embodiment of the invention further provides a user equipment, which uses the antenna described above.
  • the user equipment is a handheld device, such as a smart phone, a tablet computer or the like.
  • the preferred embodiment of the present invention provides a metal frame mobile phone antenna to realize a 4G broadband technology in a simple and effective manner on the basis of a metal frame.
  • the mobile phone antenna provided by the preferred embodiment of the present invention includes:
  • Main board PCB1 metal frame 2, antenna radiating unit 3, two feeding branch units 31, 32, grounding element 4 and two matching circuits 5, 6, feed point 7 and clearance area 8.
  • the PCB board 1 includes a dielectric substrate 11 and a back copper-plated metal ground 12.
  • the metal frame 2 and the antenna radiating unit 3 constitute a mobile phone frame; the antenna radiating unit 3 is located in a clearance area above the PCB board 1, and the metal frame 2 and the antenna radiating unit 3 are closely attached to the periphery of the mobile phone PCB board, the metal frame 2 and the antenna Radiation A pair of slits symmetrically distributed with the same size are disposed between the units 3; the grounding member 4 connects the metal frame 2 and the PCB metal ground 12.
  • the antenna radiating element 3 is connected to the two feed branch units 31, 32 as part of the metal frame of the handset.
  • the feeding branch unit 31 adopts a microstrip linear form, is located at the center of the antenna main body 3, is connected to the matching circuit network 5, and controls the low frequency portion of LTE (698-960 MHz); the feeding branch unit 32 uses the microstrip
  • the gradient line form located on one side of the antenna body 3, is connected to the matching circuit network 6 to control the high frequency portion of the LTE (1710-2690 MHz).
  • the two matching circuits 5 and 6 are respectively located on the dielectric substrate 11 and are respectively composed of a lumped element capacitor and an inductor, wherein the matching circuit 5 functions as a low-pass filter, and the matching circuit 6 functions as a high-pass filter.
  • the matching circuit network is led out by the same feed point 7 on the PCB 1.
  • 1 is a mobile phone motherboard PCB, and the mobile phone frame comprises a metal frame 2 and an antenna radiating unit 3, wherein the mobile phone frame is provided with a pair of symmetric slits 21 and 22 (between the metal frame 2 and the antenna radiating unit 3). ), its width can be 0.2mm.
  • 4 is a grounding element, 5, 6 are two matching circuits, 31, 32 are two feeding branch units of the antenna, 7 is a coaxial feeding point, and 8 is an antenna clearance area.
  • the size of the PCB board 1 may be 72mm*61mm, including the dielectric substrate 11 and the back copper-plated metal ground 12, wherein the material of the dielectric substrate 11 may be Rogers RO4003, the dielectric constant is 3.55; the antenna radiating unit 3 is made of a mobile phone.
  • the metal frame is formed in a clearing area above the PCB board 1 and connected to the two feeding branch units 31, 32; the grounding element 4 connects the metal frame 2 and the copper-plated metal ground 12, and by appropriately adjusting the grounding position thereof, Adjusting the high and low frequency bandwidth of the antenna, the grounding element can be replaced by a metal dome.
  • the two feed branch unit is located in the antenna clearance area above the PCB board 1, wherein the feed branch unit 31 is in the form of a microstrip straight line, is located at the center of the antenna main body 3, and is connected to the matching circuit network 5 to adjust the low frequency part of the LTE (698). - 960MHz); the feed branch unit 32 is in the form of a microstrip gradient line, located on one side of the antenna body 3, connected to the matching circuit network 6, adjusting the high frequency portion of the LTE (1710-2690MHz), wherein the microstrip gradient line is adopted.
  • the shape of the trapezoid is mainly to better achieve high-frequency 2.5-2.7GHz in-band impedance matching to further improve in-band performance.
  • the two matching circuits 5 and 6 are respectively located on the dielectric substrate 11, and are respectively composed of a lumped element capacitor and an inductor, wherein the matching circuit 5 functions as a low-pass filter, and the matching circuit 6 functions as a high-pass filter. It is taken out by the same feed point 7 on the PCB board 1.
  • FIG. 3 is a simulation diagram of the return loss of the antenna shown in FIG. 1, that is, the antenna without the matching circuit network, wherein the coaxial feed point 7 is directly connected to the two feed branch units 31, 32. From the simulation curve, it can be seen that only relying on the metal frame
  • the antenna radiating unit 3 can excite two resonant modes, and the resonant mode that the antenna radiating unit 3 can excite is related to the position of the two feeding branch units.
  • the two microstrip lines are respectively connected to the center and one side of the antenna radiating element 3 for feeding, and the return loss of less than -6 dB can cover the working frequency band of 1.6-2.4 GHz.
  • the antenna radiating unit 3 can generate two resonances, and generate a working frequency band of 1.6-2.4 GHz, which can be seen in the form of double feed.
  • the antenna can achieve a wider bandwidth.
  • FIG. 4 and 5 are circuit diagrams of matching networks of the antenna shown in Fig. 2, respectively.
  • the matching circuit 5 is located on the dielectric substrate 11, fed by the RF coaxial feed point 7, and connected to the feed branch unit 31, which is composed of a parallel capacitor, a series and a parallel inductor, and the matching circuit network mainly Adjusting the LTE low frequency (698-960MHz) part of the antenna, by optimizing the value of each component, the low frequency bandwidth and the in-band return loss can be changed.
  • the parallel inductance Ll1 can increase the low frequency bandwidth and reduce the parallel capacitance Cl3.
  • the return loss in the low frequency band is improved, and the high frequency is substantially unchanged; it can be seen from the characteristics of the matching circuit 5 that it approximates low pass filtering.
  • the matching circuit 6 is also on the dielectric substrate 11, and is fed by the RF coaxial feed point 7, and is connected to the feed branch unit 32, which is composed of a parallel inductor and a series capacitor.
  • the matching circuit network is mainly By adjusting the LTE high-frequency (1710-2690MHz) part of the antenna, the high-frequency bandwidth and performance can be improved by optimizing the values of the components.
  • the parallel inductance Lh2 is appropriately increased, the resonance is deepened at a high frequency of 1.71 GHz, and the resonance is changed at 2.69 GHz. Shallow, has little effect on the low frequency; it can be seen from the characteristics of the matching circuit 6 that it approximates high-pass filtering.
  • the two matching circuits 5 and 6 respectively approximate low-pass and high-pass filtering, and have good band-stop characteristics in their respective high-frequency and low-frequency bands, so the corresponding two feeding paths of the antenna are also better. Isolation.
  • the position of the ground element 4 can be appropriately adjusted for the needs of more frequency bands.
  • Figure 6 shows a simulation of the return loss based on the antenna of Figure 2. It can be seen from Figure 6 that after adding the matching network, the antenna has two resonant frequency bands, which can cover the entire LTE working frequency band (698-960MHz, 1710-2690MHz) well, and the return loss of the two-pass band is less than -6dB. At the same time, the isolation of the two-way belt is relatively high, which satisfies the technical requirements of the broadband 4G mobile phone antenna in mobile communication.
  • the above solution provided by the preferred embodiment of the present invention can be applied to the design of the metal frame mobile phone antenna.
  • the tuning switch module can be added, or the antenna branch unit can be introduced and slotted, thereby achieving better effects.
  • the shape of the antenna radiating element 3 described in the above-described embodiments and preferred embodiments of the present invention may be other shapes in addition to the U-shape.
  • the foregoing embodiments and preferred embodiments of the present invention provide a combination of a metal frame-based antenna radiating element 3 and a new matching circuit network 5, 6 to introduce a double-branch unit through a feed point 7. 31, 32 feed, realizes the low frequency bandwidth of 698-960MHz, the high frequency bandwidth is 1710-2690MHz working frequency band, broadens the frequency bandwidth, and
  • the use of double-branch feed and new matching improves the bandwidth of the antenna and the isolation of high and low frequencies, meeting the requirements of 4G multi-band use of wireless terminals.
  • the above embodiment of the present invention can not adjust the switch module or introduce additional
  • the antenna branch can also realize 4G wide frequency band, save cost, simple design and can be widely adapted to 4G mobile phones with ultra-thin metal frame.
  • the present invention employs a manner in which two feed branch units are respectively coupled to the antenna radiating unit 3, so that a sufficient wide frequency can be obtained without using an additional tuning switch.
  • the problem that the antenna occupies a large space is solved, and the volume occupied by the antenna is reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Support Of Aerials (AREA)
  • Telephone Set Structure (AREA)

Abstract

本发明提供了一种天线及用户设备。其中，该天线包括主板印刷线路板(Printed Circuit Board，简称为PCB)1、金属边框2、天线辐射单元3、第一馈电支节单元31、第二馈电支节单元32、接地元件4、馈电点7以及净空区8，其中，主板PCB1通过接地元件4与金属边框2连接；天线辐射单元3设置在位于主板PCB1上侧的净空区8中；金属边框2与天线辐射单元3设置于用户设备周边，构成用户设备的边框，且金属边框2与天线辐射单元3之间设置有第一缝隙21和第二缝隙22；馈电点7分别通过第一馈电支节单元31和第二馈电支节单元32与天线辐射单元3连接。通过本发明，解决了天线占用空间大的问题，减少了天线占用的体积。

Description

天线及用户设备 技术领域
本发明涉及通信领域，具体而言，涉及一种天线及用户设备。
背景技术
人们在关注手机的性能及质量的同时，对外观与质感的要求越来越苛刻，其中超薄、金属边框手机在目前市场越来越受到消费者喜爱，特别是目前的第四代移动通信(4G)手机，但在有金属边框的情况下，电磁波难以有效地辐射和被接收，手机天线的效率会下降，同时留给手机天线设计的空间也进一步被压缩。
近来不少手机厂商推出的金属边框手机都是将金属边框作为手机天线的一部分来设计，特别是目前一些备受青睐的4G手机，但这些基于金属边框的手机天线很难覆盖长期演进(Long Term Evolution，简称为LTE)系统的所有频段，同时，往往还需要在金属边框的基础上引入额外的可调谐开关模块、天线支节单元、以及电气连接件。
这样导致的问题就是，占用了较多的空间，同时，引入额外的调谐开关、天线支节单元、电气连接件，这些势必增加了设计成本及复杂度。
针对相关技术中的天线占用空间大的问题，目前没有提出有效的解决方案。
发明内容
为了解决上述技术问题，本发明提供了一种天线及用户设备。
根据本发明的一个方面，提供了一种天线，包括：主板印刷线路板(PCB)1、金属边框2、天线辐射单元3、第一馈电支节单元31、第二馈电支节单元32、接地元件4、馈电点7以及净空区8，其中，
所述主板PCB1通过所述接地元件4与所述金属边框2连接；
所述天线辐射单元3设置在位于所述主板PCB1上侧的净空区8中；
所述金属边框2与所述天线辐射单元3设置于用户设备周边，构成所述用户设备的边框，且所述金属边框2与所述天线辐射单元3之间设置有第一缝隙21和第二缝隙22；
所述馈电点7分别通过第一馈电支节单元31和第二馈电支节单元32与天线辐射单元3连接。
优选地，所述天线还包括：第一匹配电路5、第二匹配电路6，其中，所述第一匹配电路5和所述第二匹配电路6设置于所述主板PCB1上；所述第一匹配电路5的一端通过第一馈电 支节单元31与所述天线辐射单元3连接，所述第一匹配电路5的另一端分别与所述第二匹配电路6和所述馈电点7连接；所述第二匹配电路6的一端通过第二馈电支节单元32与所述天线辐射单元3连接，所述第二匹配电路6的另一端分别与所述第一匹配电路5和所述馈电点7连接。
优选地，所述主板PCB1包括：介质基板11和由所述介质基板11背面的覆金属区构成的金属地12，其中，
所述金属地12通过所述接地元件4与所述金属边框2连接；
所述第一匹配电路5和所述第二匹配电路6设置于所述介质基板11上。
优选地，所述金属边框2和所述天线辐射单元31均为对称U型结构；所述第一缝隙21和所述第二缝隙22的缝隙间隔尺寸相同，且所述第一缝隙21和所述第二缝隙22在所述用户设备的边框两侧对称设置。
优选地，所述第一馈电支节单元31在天线辐射单元3的U型结构内侧的中心位置与所述天线辐射单元3连接；所述第二馈电支节单元32在天线辐射单元3的U型结构内侧的中心位置的一侧与所述天线辐射单元3连接，其中，
所述第一馈电支节单元31采用微带直线形式，设置为控制低频部分；
所述第二馈电支节单元32采用微带渐变线形式，设置为控制高频部分。
优选地，所述低频部分包括：698MHz～960MHz，所述高频部分包括：1710MHz～2690MHz。
优选地，所述第二馈电支节单元32采用的是梯形的微带渐变线形式。
优选地，所述第一匹配电路5，设置为低通滤波；所述第二匹配电路6，设置为高通滤波。
优选地，所述第一匹配电路5和所述第二匹配电路6由集总元件电容和电感组成。
根据本发明的另一个方面，还提供了一种用户设备，包括：上述的天线。
通过本发明，采用的天线，包括主板PCB1、金属边框2、天线辐射单元3、第一馈电支节单元31、第二馈电支节单元32、接地元件4、馈电点7以及净空区8，其中，主板PCB1通过接地元件4与金属边框2连接；天线辐射单元3设置在位于主板PCB1上侧的净空区8中；金属边框2与天线辐射单元3设置于用户设备周边，构成用户设备的边框，且金属边框2与天线辐射单元3之间设置有第一缝隙21和第二缝隙22；馈电点7分别通过第一馈电支节单元31和第二馈电支节单元32与天线辐射单元3连接的方式，解决了天线占用空间大的问题，减少了天线占用的体积。
附图说明
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示 意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1是根据本发明实施例的天线的结构示意图；
图2是根据本发明实施例的天线的优选结构示意图；
图3是根据图1所示的天线的回波损耗仿真曲线图；
图4是根据图2所示的天线的第一匹配电路的结构示意图；
图5是根据图2所示的天线的第二匹配电路的结构示意图；
图6是根据图2所示的天线的回波损耗仿真曲线图。
具体实施方式
下文中将参考附图并结合实施例来详细说明本发明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
本发明的其它特征和优点将在随后的说明书中阐述，并且，部分地从说明书中变得显而易见，或者通过实施本发明而了解。本发明的目的和其他优点可通过在所写的说明书、权利要求书、以及附图中所特别指出的结构来实现和获得。
为了使本技术领域的人员更好地理解本发明方案，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分的实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都应当属于本发明保护的范围。
本发明实施例提供了一种天线，图1是根据本发明实施例的天线的结构示意图，如图1所示，该天线包括：主板印刷线路板(Printed Circuit Board，简称为PCB)1、金属边框2、天线辐射单元3、第一馈电支节单元31、第二馈电支节单元32、接地元件4、馈电点7以及净空区8，其中，
主板PCB1通过接地元件4与金属边框2连接；
天线辐射单元3设置在位于主板PCB1上侧的净空区8中；
金属边框2与天线辐射单元3设置于用户设备周边，构成用户设备的边框，且金属边框2与天线辐射单元3之间设置有第一缝隙21和第二缝隙22；
所述馈电点7分别通过第一馈电支节单元31和第二馈电支节单元32与天线辐射单元3连接。
通过上述的天线，采用两个馈电支节单元分别与天线辐射单元3连接的方式，从而可以不需要采用额外的调谐开关也能够获得足够的宽频。这样，相对于现有技术中的天线而言，解决了天线占用空间大的问题，减少了天线占用的体积。
优选地，上述的用户设备包括：手机、平板电脑等集成了天线的设备。
图2是根据本发明实施例的天线的优选结构示意图，如图2所示，优选地，上述天线还包括第一匹配电路5和第二匹配电路6，其中，第一匹配电路5和第二匹配电路6设置于主板PCB1上；第一匹配电路5的一端通过第一馈电支节单元31与天线辐射单元3连接，第一匹配电路5的另一端分别与第二匹配电路6和馈电点7连接；第二匹配电路6的一端通过第二馈电支节单元32与天线辐射单元3连接，第二匹配电路6的另一端分别与第一匹配电路5和馈电点7连接。
优选地，主板PCB1包括：介质基板11和由介质基板11背面的覆金属区构成的金属地12，其中，金属地12通过接地元件4与金属边框2连接；第一匹配电路5和第二匹配电路6设置于介质基板11上。
优选地，金属边框2和天线辐射单元31均为对称U型结构；第一缝隙21和第二缝隙22的缝隙间隔尺寸相同，且第一缝隙21和第二缝隙22在用户设备的边框两侧对称设置。
优选地，第一馈电支节单元31在天线辐射单元3的U型结构内侧的中心位置与天线辐射单元3连接；第二馈电支节单元32在天线辐射单元3的U型结构内侧的中心位置的一侧与天线辐射单元3连接，其中，第一馈电支节单元31采用微带直线形式，设置为控制低频部分；第二馈电支节单元32采用微带渐变线形式，设置为控制高频部分。
优选地，低频部分包括：698MHz～960MHz，高频部分包括：1710MHz～2690MHz。
优选地，第二馈电支节单元32采用的是梯形的微带渐变线形式。
优选地，第一匹配电路5，设置为低通滤波；第二匹配电路6，设置为高通滤波。
优选地，第一匹配电路5和第二匹配电路6由集总元件电容和电感组成。
本发明实施例还提供了一种用户设备，该用户设备采用了上述的天线。
优选地，上述用户设备为手持设备，例如，智能手机，平板电脑等。
为了使本发明实施例的描述更加清楚，下面结合优选实施例进行描述和说明。
本发明优选实施例提供了一种金属边框手机天线，以实现在金属边框的基础上采用简易有效的方式实现4G宽频技术。
为解决上述技术问题，本发明优选实施例提供的手机天线，包括：
主板PCB1，金属边框2，天线辐射单元3，两馈电支节单元31、32，接地元件4和两个匹配电路5、6，馈电点7以及净空区8。
可选地，PCB板1包括介质基板11及背面铺铜区金属地12。
可选地，金属边框2和天线辐射单元3构成手机边框；天线辐射单元3位于PCB板1上方的净空区，金属边框2和天线辐射单元3紧贴手机PCB板的周围，金属边框2与天线辐射 单元3之间设有一对对称分布相同尺寸的缝隙；接地元件4连接金属边框2与PCB板金属地12。
可选地，天线辐射单元3作为手机的金属边框的一部分，与两馈电支节单元31、32相连。
可选地，馈电支节单元31采用微带直线形式，位于天线主体3的中心，与匹配电路网络5相连，控制LTE的低频部分(698-960MHz)；馈电支节单元32采用微带渐变线形式，位于天线主体3的一侧，与匹配电路网络6相连，控制LTE的高频部分(1710-2690MHz)。
可选地，两匹配电路5、6均位于介质基板11上，分别由集总元件电容和电感组成，其中匹配电路5起到低通滤波的作用，匹配电路6起到高通滤波的作用，两匹配电路网络均由PCB板1上的同一馈电点7引出。
下面以图2为例，对本发明优选实施例的方案进行详细说明。
在图2中，1为手机主板PCB，手机边框包括金属边框2和天线辐射单元3两部分，其中手机边框上设有一对对称的缝隙21、22(位于金属边框2和天线辐射单元3之间)，其宽度均可以为0.2mm。4为接地元件，5、6为两个匹配电路，31、32即天线的两馈电支节单元，7为同轴馈电点，8为天线净空区。
上述PCB板1的大小可以为72mm*61mm，包括介质基板11及背部铺铜区金属地12，其中，介质基板11的材料可以采用Rogers RO4003，介电常数为3.55；天线辐射单元3由手机的金属框构成，位于PCB板1上方的净空区，与两馈电支节单元31、32相连；的接地元件4连接金属边框2与铺铜区金属地12，通过适当的调节其接地位置，可以调节天线高低频带宽，该接地元件可以由金属弹片代替。
两馈电支节单元位于PCB板1上方的天线净空区，其中馈电支节单元31采用微带直线形式，位于天线主体3的中心，与匹配电路网络5相连，调节LTE的低频部分(698-960MHz)；馈电支节单元32采用微带渐变线形式，位于天线主体3的一侧，与匹配电路网络6相连，调节LTE的高频部分(1710-2690MHz)，其中微带渐变线采用梯形的形状，主要是为了更好地实现高频2.5-2.7GHz带内阻抗匹配，进一步提升带内性能。
两匹配电路5、6均位于介质基板11上，分别由集总元件电容和电感组成，其中匹配电路5起到低通滤波的作用，匹配电路6起到高通滤波的作用，两匹配电路网络均由PCB板1上的同一馈电点7引出。
在上述优选实施例中，仅利用双支节馈电的金属边框辐射单元和匹配网络，占用空间较小，没有引入调谐开关模块及辅助天线支节，节省了成本，简化了设计，同时，可以实现LTE宽频带，该方案也可以用于全金属手机天线设计中。
下面对本发明优选实施例采用的双支节馈电的工作效果进行说明。
图3为图1所示的天线，即天线没有加匹配电路网络的回波损耗仿真曲线图，其中，同轴馈电点7直接与两馈电支节单元31、32相连。从仿真曲线中，可以看出仅依靠金属边框的 天线辐射单元3，可以激励两种谐振模式，而天线辐射单元3所能激起的谐振模式与两馈电支节单元接入的位置有关，本优选实施例中为了获得所需要的带宽，采用两微带线分别接入天线辐射单元3的中心与一侧进行馈电，其回波损耗均小于-6dB的带宽可以覆盖1.6-2.4GHz的工作频段。
由仿真结果可知，不加天线匹配电路网络，通过优化两馈电支节单元接入的位置，天线辐射单元3可以产生两个谐振，产生1.6-2.4GHz的工作频段，可见采用双馈形式，天线可以获得较宽的带宽。
下面对本发明优选实施例采用匹配电路网络的天线的工作效果进行说明。
图4、5分别为图2所示天线的匹配网络电路图。
如图4所示，匹配电路5位于介质基板11上，由射频同轴馈电点7进行馈电，连接馈电支节单元31，由并联电容、串联和并联电感组成，该匹配电路网络主要调节天线的LTE低频(698-960MHz)部分，通过优化各元件的值，可以改变低频带宽及带内回波损耗，例如，适当增大并联电感Ll1，可以提高低频带宽，减小并联电容Cl3，改善低频带内回损，高频基本不变；单从匹配电路5的特性可以看出，其近似低通滤波。
如图5所示，匹配电路6位也于介质基板11上，由射频同轴馈电点7进行馈电，连接馈电支节单元32，由并联电感、串联电容组成，该匹配电路网络主要调节天线的LTE高频(1710-2690MHz)部分，通过优化各元件的值，可以提高高频带宽及性能，例如，适当增大并联电感Lh2，高频1.71GHz处谐振加深，2.69GHz处谐振变浅，对低频影响不大；单从匹配电路6的特性可以看出，其近似高通滤波。
由上述仿真结果可知：两匹配电路5、6分别近似低通、高通滤波，在其各自对应的高频、低频频段具有较好带阻特性，所以对应的天线两条馈电通路也具有较好隔离度。
可选地，为了更多频段的需求，还可以适当调整接地元件4的位置。
图6给出了基于图2的天线的回波损耗仿真曲线图。从图6中可以看到加入匹配网络后，天线具有两个谐振频段，可以很好地覆盖整个LTE工作频段(698-960MHz、1710-2690MHz)，且两通带内回波损耗均小于-6dB，同时两通带的隔离度较高，满足了移动通信中宽频4G手机天线的技术要求。
为了兼顾外观和性能，本发明优选实施例提供的上述方案可以用于很好地应用到金属边框手机天线的设计当中。并且，本发明优选实施例所提供的方案，也可以加入调谐开关模块、或引入天线支节单元、开槽，从而取得更好的效果。并且，在本发明上述实施例和优选实施例中描述的天线辐射单元3的形状除了可以是U型外，还可以为其他的形状。
综上所述，本发明上述实施例和优选实施例提供的方案，将基于金属框的天线辐射单元3和一种新型匹配电路网络5、6结合，通过一个馈电点7引入双支节单元31、32馈电，实现了低频带宽为698-960MHz，高频带宽为1710-2690MHz的工作频段，拓宽了频带宽度，并且 采用双支节馈电及新型匹配提高了天线的带宽及高低频隔离度，满足了无线终端的4G多频段使用要求。并且，上述技术方案，仅使用金属手机边框的天线辐射单元和匹配网络，占用空间较小，可以用于全金属手机天线设计中，同时，本发明上述实施例可以不加调谐开关模块或引入额外的天线支节也能实现4G宽频带，节省了成本，设计简单易行，可以广泛适应于超薄金属边框的4G手机中。
工业实用性：通过上述描述可知，本发明采用两个馈电支节单元分别与天线辐射单元3连接的方式，从而可以不需要采用额外的调谐开关也能够获得足够的宽频。这样，相对于现有技术中的天线而言，解决了天线占用空间大的问题，减少了天线占用的体积。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种天线，包括：主板PCB(1)、金属边框(2)、天线辐射单元(3)、第一馈电支节单元(31)、第二馈电支节单元(32)、接地元件(4)、馈电点(7)以及净空区(8)，其中，
    所述主板印刷线路板PCB(1)通过所述接地元件(4)与所述金属边框(2)连接；
    所述天线辐射单元(3)设置在位于所述主板PCB(1)上侧的所述净空区(8)中；
    所述金属边框(2)与所述天线辐射单元(3)设置于用户设备周边，构成所述用户设备的边框，且所述金属边框(2)与所述天线辐射单元(3)之间设置有第一缝隙(21)和第二缝隙(22)；
    所述馈电点(7)分别通过第一馈电支节单元(31)和第二馈电支节单元(32)与天线辐射单元(3)连接。
  2. 根据权利要求1所述的天线，其中，所述天线还包括：第一匹配电路(5)、第二匹配电路(6)，其中，
    所述第一匹配电路(5)和所述第二匹配电路(6)设置于所述主板PCB(1)上；所述第一匹配电路(5)的一端通过第一馈电支节单元(31)与所述天线辐射单元(3)连接，所述第一匹配电路(5)的另一端分别与所述第二匹配电路(6)和所述馈电点(7)连接；所述第二匹配电路(6)的一端通过第二馈电支节单元(32)与所述天线辐射单元(3)连接，所述第二匹配电路(6)的另一端分别与所述第一匹配电路(5)和所述馈电点(7)连接。
  3. 根据权利要求2所述的天线，其中，所述主板PCB(1)包括：介质基板(11)和由所述介质基板(11)背面的覆金属区构成的金属地(12)，其中，
    所述金属地(12)通过所述接地元件(4)与所述金属边框(2)连接；
    所述第一匹配电路(5)和所述第二匹配电路(6)设置于所述介质基板(11)上。
  4. 根据权利要求2所述的天线，其中，
    所述金属边框(2)和所述天线辐射单元(31)均为对称U型结构；所述第一缝隙(21)和所述第二缝隙(22)的缝隙间隔尺寸相同，且所述第一缝隙(21)和所述第二缝隙(22)在所述用户设备的边框两侧对称设置。
  5. 根据权利要求4所述的天线，其中，所述第一馈电支节单元(31)在天线辐射单元(3)的U型结构内侧的中心位置与所述天线辐射单元(3)连接；所述第二馈电支节单元(32)在天线辐射单元(3)的U型结构内侧的中心位置的一侧与所述天线辐射单元(3)连接，其中，
    所述第一馈电支节单元(31)采用微带直线形式，设置为控制低频部分；
    所述第二馈电支节单元(32)采用微带渐变线形式，设置为控制高频部分。
  6. 根据权利要求5所述的天线，其中，
    所述低频部分包括：698MHz～960MHz，所述高频部分包括：1710MHz～2690MHz。
  7. 根据权利要求5所述的天线，其中，
    所述第二馈电支节单元(32)采用的是梯形的微带渐变线形式。
  8. 根据权利要求5所述的天线，其中，
    所述第一匹配电路(5)，设置为低通滤波；
    所述第二匹配电路(6)，设置为高通滤波。
  9. 根据权利要求1至8中任一项所述的天线，其中，
    所述第一匹配电路(5)和所述第二匹配电路(6)由集总元件电容和电感组成。
  10. 一种用户设备，包括：如权利要求1至9中任一项所述的天线。
PCT/CN2015/087832 2015-06-24 2015-08-21 天线及用户设备 WO2016206181A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US15/738,130 US20180183138A1 (en) 2015-06-24 2015-08-21 Antenna and User Equipment
EP15896076.5A EP3300170B1 (en) 2015-06-24 2015-08-21 Antenna and user equipment

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201510354981.4 2015-06-24
CN201510354981.4A CN106299637B (zh) 2015-06-24 2015-06-24 天线及用户设备

Publications (1)

Publication Number Publication Date
WO2016206181A1 true WO2016206181A1 (zh) 2016-12-29

Family

ID=57584692

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2015/087832 WO2016206181A1 (zh) 2015-06-24 2015-08-21 天线及用户设备

Country Status (4)

Country Link
US (1) US20180183138A1 (zh)
EP (1) EP3300170B1 (zh)
CN (1) CN106299637B (zh)
WO (1) WO2016206181A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109831551A (zh) * 2018-12-27 2019-05-31 华为终端有限公司 一种移动电话

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206976578U (zh) * 2017-06-23 2018-02-06 深圳市大疆创新科技有限公司 云台
CN107732434B (zh) * 2017-11-14 2023-09-12 深圳市信维通信股份有限公司 一种全金属四合一天线
US11688930B2 (en) * 2018-05-08 2023-06-27 Huawei Technologies Co., Ltd. Antenna apparatus and mobile terminal
CN109546308A (zh) * 2018-11-22 2019-03-29 维沃移动通信有限公司 一种天线结构及终端设备
CN110011025B (zh) * 2018-12-29 2021-03-26 瑞声科技(新加坡)有限公司 一种天线系统及移动终端
CN113690582B (zh) * 2020-05-19 2023-02-03 华为技术有限公司 一种可穿戴设备
CN114122710A (zh) * 2020-08-28 2022-03-01 深圳富泰宏精密工业有限公司 天线结构及具有该天线结构的电子设备
CN113241517A (zh) * 2021-05-10 2021-08-10 南昌黑鲨科技有限公司 一种分馈电式手机天线

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103682620A (zh) * 2012-09-25 2014-03-26 宏达国际电子股份有限公司 移动装置
CN104143681A (zh) * 2013-05-10 2014-11-12 宏碁股份有限公司 移动装置
CN104485512A (zh) * 2014-11-28 2015-04-01 深圳市信维通信股份有限公司 用于具有金属框架便携式设备的lte载波聚合天线
CN104505589A (zh) * 2014-12-10 2015-04-08 深圳市信维通信股份有限公司 具有全金属外壳便携式设备的lte载波聚合天线
CN104701619A (zh) * 2014-12-31 2015-06-10 东莞劲胜精密组件股份有限公司 一种环形回路闭合金属环天线及移动设备

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8947303B2 (en) * 2010-12-20 2015-02-03 Apple Inc. Peripheral electronic device housing members with gaps and dielectric coatings

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103682620A (zh) * 2012-09-25 2014-03-26 宏达国际电子股份有限公司 移动装置
CN104143681A (zh) * 2013-05-10 2014-11-12 宏碁股份有限公司 移动装置
CN104485512A (zh) * 2014-11-28 2015-04-01 深圳市信维通信股份有限公司 用于具有金属框架便携式设备的lte载波聚合天线
CN104505589A (zh) * 2014-12-10 2015-04-08 深圳市信维通信股份有限公司 具有全金属外壳便携式设备的lte载波聚合天线
CN104701619A (zh) * 2014-12-31 2015-06-10 东莞劲胜精密组件股份有限公司 一种环形回路闭合金属环天线及移动设备

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109831551A (zh) * 2018-12-27 2019-05-31 华为终端有限公司 一种移动电话

Also Published As

Publication number Publication date
EP3300170A1 (en) 2018-03-28
EP3300170A4 (en) 2018-06-20
CN106299637A (zh) 2017-01-04
EP3300170B1 (en) 2019-10-30
CN106299637B (zh) 2020-05-15
US20180183138A1 (en) 2018-06-28

Similar Documents

Publication Publication Date Title
WO2016206181A1 (zh) 天线及用户设备
CN111628298B (zh) 共体天线及电子设备
US10601117B2 (en) Antenna and mobile terminal
US11735809B2 (en) Antenna system and terminal device
US20230344152A1 (en) Antenna assembly and electronic device
CN109216885B (zh) 移动装置
JP6122503B2 (ja) 無線端末
EP3767742B1 (en) Antenna device and mobile terminal
US20230216196A1 (en) Multi-band antenna and mobile terminal
TWI539676B (zh) 通訊裝置
WO2022247652A1 (zh) 一种终端天线及终端电子设备
CN113437480A (zh) 一种多频天线装置及移动终端
WO2023273607A1 (zh) 天线模组及电子设备
WO2023273604A1 (zh) 天线模组及电子设备
CN108432048B (zh) 一种缝隙天线和终端
EP3159966B1 (en) Antenna device and terminal
CN115133269A (zh) 天线组件及电子设备
JP7243966B2 (ja) アンテナシステム及び端末デバイス
CN116073134A (zh) 一种宽度不对称的单槽缝隙天线及电子设备
CN115882201A (zh) 天线组件及电子设备

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: 15896076

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2015896076

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 15738130

Country of ref document: US

NENP Non-entry into the national phase

Ref country code: DE