WO2017107057A1 - Terminal mobile - Google Patents

Terminal mobile Download PDF

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Publication number
WO2017107057A1
WO2017107057A1 PCT/CN2015/098284 CN2015098284W WO2017107057A1 WO 2017107057 A1 WO2017107057 A1 WO 2017107057A1 CN 2015098284 W CN2015098284 W CN 2015098284W WO 2017107057 A1 WO2017107057 A1 WO 2017107057A1
Authority
WO
WIPO (PCT)
Prior art keywords
radiating
unit
printed circuit
circuit board
mobile terminal
Prior art date
Application number
PCT/CN2015/098284
Other languages
English (en)
Chinese (zh)
Inventor
高建明
张琛
刘兵
孙树辉
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
Priority to CN201580070394.0A priority Critical patent/CN107112633B/zh
Priority to PCT/CN2015/098284 priority patent/WO2017107057A1/fr
Publication of WO2017107057A1 publication Critical patent/WO2017107057A1/fr

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Classifications

    • 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
    • H01Q5/30—Arrangements for providing operation on different wavebands

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a mobile terminal.
  • Mobile Wireless Fidelity Mobile Wi-Fi
  • the conventional wireless router accesses the Internet through the network cable interface, and generally does not need to move, and Mobile Wi-Fi mainly uses 3G wireless technology to access the Internet, and is convenient for mobile use.
  • the basic principle is shown in Figure 1, and Wifi is more and more.
  • the use of the terminal products brings convenience to mobile communications.
  • 3G 4G mobile technology the performance requirements of WIFI are getting higher and higher, consumers are paying more and more attention to the size of terminal products, and the design of high-performance miniaturized WIFI antennas on terminal products is particularly necessary.
  • the conventional antenna traces are basically used, and the size is large. Although the efficiency is good, the WIFI footprint ratio cannot be effectively reduced, and the size disadvantage of the multi-WIFI antenna terminal is more obvious. At the same time, in terms of cost reduction, the increase in the area occupied by WIFI also has an adverse effect on the reduction of cost.
  • the present invention provides a mobile terminal for reducing the size of an antenna and facilitating miniaturization of the mobile terminal.
  • a mobile terminal comprising a printed circuit board and a device
  • An antenna unit disposed on the printed circuit board the antenna unit includes two radiating units that are perpendicular to each other and connected, and a feeding unit that respectively feeds the two radiating units, and the two radiating units Coupling with the ground on the printed circuit board, respectively; when the feed unit feeds any of the radiating elements, coupling the radiating element to the ground on the printed circuit substrate increases the electrical length of the radiating element.
  • the two radiating units are respectively a first radiating unit and a second radiating unit, and the first radiating unit is a Z-shaped structure, and the second The radiating element is an L-shaped structure, wherein a horizontal portion of the first radiating element at the bottom and a horizontal portion of the second radiating unit are of a unitary structure.
  • a horizontal portion of the first radiating unit is coupled to a ground of the printed circuit board, and a second radiating unit A vertical portion is coupled to the ground of the printed circuit board.
  • the horizontal portion of the top portion of the first radiating unit and the bending direction of the vertical portion of the second radiating unit relatively.
  • the feeding unit is located in a vertical portion of the first radiating unit and the first radiating unit
  • the second radiating element is formed in a region surrounded by a horizontal portion of the unitary structure.
  • the feeding unit is an L-shaped structure, and the feeding unit laterally excites the first radiating unit and the second radiating unit by a coupling feeding A 2.4G resonance is generated, the feed unit longitudinally exciting the first radiating element by a coupling feed to generate a 5G resonance.
  • the end of the horizontal portion of the second radiating element is inductively coupled to the ground of the printed circuit board.
  • the two radiating elements are divided into The first radiating element and the second radiating element are connected, and the end of each radiating element is connected to one plate of the capacitive element, and the ground of the printed circuit board is connected to the other plate of the capacitive element.
  • an end of the first radiating element is coupled to the second radiating element to form an inverted T-shaped structure.
  • an end of the second radiating element that is away from the capacitive element connected to the second radiating element and the printed circuit The ground inductance of the substrate is connected.
  • the antenna unit in the mobile terminal uses two relatively vertical radiating units, and the two radiating units are separately fed by the feeding unit to excite the signal, and the two radiating units are Capacitively coupled to the ground of the printed circuit board, respectively, thereby increasing the resonant electrical length of the radiating element such that the radiating element can take a smaller length. Furthermore, the size of the antenna is reduced without changing the radiation effect of the antenna.
  • FIG. 1 is a schematic structural diagram of a mobile terminal according to an embodiment of the present disclosure
  • FIG. 2 is a schematic structural diagram of an antenna unit of a mobile terminal according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a standing wave of a simulated antenna according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of radiation efficiency of a simulated antenna according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of current distribution of a 2.4G antenna according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of current distribution of a 5G antenna according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a standing wave detection of a physical antenna according to an embodiment of the present invention.
  • Figure 8 is a schematic diagram of the measured antenna efficiency
  • FIG. 9 is a schematic structural diagram of another antenna unit according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic diagram of simulation of adding lumped element antenna return loss simulation.
  • ground on the printed circuit board refers to other copper structures on the printed circuit board that remove the antenna unit structure, such as other circuit traces.
  • a mobile terminal comprising a printed circuit substrate and an antenna unit disposed on the printed circuit substrate, the antenna unit comprising two mutually perpendicular and connected a radiating unit, and a feeding unit respectively feeding the two radiating units, and the two radiating units are respectively coupled to a ground on the printed circuit board; and feeding the radiating unit to the feeding unit
  • the coupling of the radiating element to the ground on the printed circuit substrate increases the electrical length of the radiating element.
  • the miniaturized antenna in the mobile terminal uses two relatively vertical radiating units, and the two radiating units are respectively fed by the feeding unit to excite the signal, and the signal is passed.
  • the two radiating elements are respectively capacitively coupled to the ground of the printed circuit board, thereby increasing the resonant electrical length of the radiating element such that the radiating element can take a smaller length.
  • the size of the antenna is reduced without changing the radiation effect of the antenna.
  • the two radiating elements are respectively a first radiating unit and a second radiating unit.
  • the 2.4G resonance generation principle the feed unit and the first radiation unit and the second radiation unit respectively perform coupling feeding, and the lateral coupling excitation activates the first radiation unit and the second radiation unit to perform radiation.
  • the two radiating elements jointly generate resonance at 2.4G, which is conducive to widening the antenna bandwidth.
  • 5G resonance generation principle the feed is coupled by the feed unit, and the second radiation unit is longitudinally excited to generate resonance.
  • the ground coupling of the second radiating element with the printed circuit board is equivalent to increasing the electrical length of the second radiating element, and the coupling size is advantageous for adjusting the 5G resonant position.
  • the mechanism for miniaturizing the antenna is that the coupling of the second radiating element and the printed circuit board ground provides an equivalent capacitance function, which is to increase the resonant electrical length of the second radiating element, the first radiating element and the printed circuit.
  • the coupling between the substrate grounds provides an equivalent capacitance that increases the resonant electrical length of the second radiating element.
  • the capacitors are loaded such that the equivalent electrical length of the first radiating element and the second radiating element is increased, and the occupied area of the antenna trace is reduced, thereby miniaturizing the antenna.
  • the number of the antenna units 20 on the mobile terminal provided in this embodiment may be one or more.
  • the number of the antenna units 20 is two, and two.
  • the antenna elements 20 are symmetrically disposed on both sides of the printed circuit board 10.
  • FIG. 2 shows the structure of the antenna unit 20.
  • the antenna unit 20 is composed of a radiating unit and a feeding unit 23.
  • the number of the radiating elements is two, and the feeding unit 23 is used to excite the two radiating elements by the coupling feeding.
  • the structure of the radiating element can be based on different structures, and the structure of the radiating element will be described in detail below with reference to specific drawings.
  • FIG. 2 is a schematic diagram of an antenna structure provided by an embodiment of the present invention.
  • the two radiating elements are the first radiating unit 21 and the second radiating unit 22, respectively, and the first radiating unit 21 is a Z-shaped structure, and two horizontal portions of the first radiating unit 21 (top The horizontal portion 211 and the horizontal portion of the bottom are both perpendicular to the vertical portion 212, and the second radiating element 22 is an L-shaped structure, wherein the horizontal portion of the first radiating unit 21 at the bottom and the horizontal portion 222 of the second radiating unit 22 As a unitary structure.
  • the first radiating element 21 is an inverted L-shaped structure, and the top horizontal portion 211 of the first radiating element 21 is coupled to the ground 11 of the printed circuit board, and the second radiating unit 22 It is a horizontal L-shaped structure, and the vertical portion 221 of the second radiating element 22 is coupled to the ground 11 of the printed circuit board. That is, as shown in FIG. 2, the first radiating element 21 is efi, wherein the horizontal portion 211 is ef, the vertical portion 212 is fi, and the horizontal portion id at the bottom is at the first radiating element 21 and the printed circuit board.
  • the ef of the first radiating element 21 is coupled to the ground 11 of the printed circuit board equivalent to a capacitance.
  • the second radiating element 22 is gcd, wherein the horizontal portion 221 is cid and the vertical portion 222 is gc.
  • the gc portion of the second radiating element 22 and the printed circuit The ground 11 of the substrate is coupled to be equivalent to a capacitor.
  • the id portion of the first radiating unit 21 and the id portion of the cid portion in the second radiating unit 22 are of a unitary structure.
  • the horizontal portion 211 of the top portion of the first radiating element 21 and the second radiating unit 22 The bending directions of the vertical portions 221 are opposite. That is, as shown in FIG. 2, the bending direction of the top horizontal portion 221 of the first radiation unit 21 is opposite to the bending direction of the vertical portion 221 in the second radiation unit 22. Thereby, the first radiating unit 21 and the second radiating unit 22 are disposed to minimize the occupied area.
  • the feeding unit 23 has an L-shaped structure, and the feeding unit 23 laterally excites the first radiating unit 21 and the second radiating unit 22 to generate 2.4G resonance by the coupling feeding.
  • the feed unit 23 generates the 5G resonance by longitudinally exciting the first radiating element 21 by the coupling feed.
  • the feeding unit 23 is disposed in the area enclosed by the fid, thereby reducing the space occupied by the antenna unit.
  • the principle of 2.4G resonance generation through the coupling feeding, the lateral coupling excitation radiates the efd and gcd double branches, and the two branches jointly generate resonance at 2.4G, which is conducive to widening the antenna bandwidth.
  • the antenna miniaturization implementation mechanism: ef is coupled with the ground 11 of the printed circuit board 10 to provide an equivalent capacitance function, which is to increase the resonant length of the efd branch, and the coupling between gc and the ground 11 of the printed circuit board 10 provides an equivalent capacitance. The effect is to increase the resonant electrical length of the gcd branch.
  • the end of the horizontal portion 221 of the second radiating element 22 is inductively coupled to the ground 11 of the printed circuit board. That is, the inductance applied between dh (h is a point on the ground 11 of the printed circuit board) is advantageous for increasing the electrical length of efd and gcd.
  • the equivalent electrical length of the efd and gcd double branches is increased.
  • These capacitors are loaded in an inductor, which increases the equivalent electrical length of the efd and gcd double branches, and reduces the antenna footprint, thereby miniaturizing the antenna.
  • 5G resonance generation principle through the coupling feed, the longitudinal excitation acts as the efi branch to generate resonance.
  • the coupling of ef and ground 11 of the printed circuit board is equivalent to the increase of the efi section
  • the electrical length and coupling size facilitate adjustment of the 5G resonant position.
  • the overall size of the printed circuit board is 65 mm * 50 mm, and the reference is a commonly developed size of a general small size E5 product.
  • the antenna unit of the present invention is placed centrally on the side of the board.
  • the occupied area is 4*8mm.
  • the standing wave S11 obtained by the simulation is shown in Fig. 3.
  • the signal covers 2.4G to 2.5 GHz and 5.15G to 5.85 GHz (the terminal product 5G is usually 36CH to 165CH, that is, 5180 MHz to 5825 MHz).
  • the radiation efficiency of the antenna unit is shown in Fig. 4; and the current distribution of the antenna at 2.4G and 5G is simulated as shown in Figs. 5 and 6.
  • 5 is the 2.4G antenna current distribution
  • FIG. 6 is the 5G antenna current distribution. From the simulation current distribution, the 2.4G resonant path and the 5G resonant path are consistent with the theoretical analysis.
  • the product of the fixture is actually debugged.
  • the standing wave and efficiency are tested as shown in Fig. 7 and Fig. 8. From the measured efficiency, the 2.4G efficiency is 42-62%, and the 5G efficiency is 40%-60%. Due to the high frequency loss of the FR4 dielectric board, the 5G measured efficiency is lower than the simulation. But it is also about 1dB more efficient than the traditional antenna scheme, meeting the design specifications of the terminal product wifi antenna.
  • the two radiating elements provided in this embodiment are the first radiating unit 21 and the second radiating unit 22, respectively, and the end of each radiating unit is connected to one plate of the capacitive element, and the printed circuit board 10 is The ground 11 is connected to the other plate of the capacitive element.
  • the working principle of the antenna unit 20 provided in this embodiment is the same as that in the first embodiment, and details are not described herein again.
  • the end of the first radiating element 21 is connected to the second radiating element 22 to form an inverted T-shaped structure.
  • the end of the capacitive element connected to the second radiating element 22 on the second radiating element 22 is inductively connected to the ground 11 of the printed circuit board 10.
  • the electrical length of the first radiating element 21 and the second radiating element 22 is effectively increased by the applied inductance.
  • C1 denotes a capacitance which replaces the coupling between the second radiating element 22 and the ground 11 of the printed circuit board
  • C2 denotes a capacitance which replaces the coupling between the first radiating element 21 and the ground 11 of the printed circuit board
  • C3 represents the applied inductance.
  • the antenna unit 20 provided in the second embodiment is a modified structure in the first embodiment, that is, the coupling between the radiating unit and the ground 11 of the printed circuit board 10 is replaced by a capacitive element, thereby facilitating the setting of the antenna and further reducing The space occupied by the antenna unit 20.

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Abstract

La présente invention se rapporte au domaine technique des communications. L'invention concerne un terminal mobile. Le terminal mobile comprend une carte de circuit imprimé et un élément d'antenne disposé sur la carte de circuit imprimé. L'élément d'antenne comprend deux éléments rayonnants perpendiculaires et connectés l'un à l'autre, et un élément d'alimentation conçu pour alimenter les deux éléments rayonnants respectivement, et les deux éléments rayonnants sont couplés séparément à une masse sur la carte de circuit imprimé. Lorsque l'élément d'alimentation alimente chaque élément rayonnant, l'élément rayonnant est couplé à la masse sur la carte de circuit imprimé pour augmenter une longueur électrique de l'élément rayonnant. L'élément d'antenne dans le terminal mobile adopte deux éléments rayonnants perpendiculaires l'un à l'autre, l'élément d'alimentation est utilisé pour alimenter séparément les deux éléments rayonnants pour exciter des signaux, et les deux éléments rayonnants sont couplés séparément à un condensateur de masse de la carte de circuit imprimé pour augmenter la longueur électrique résonante des éléments rayonnants, de sorte que les éléments rayonnants puissent adopter une petite longueur, ce qui permet de réduire la dimension d'une antenne sans modifier l'effet de rayonnement de l'antenne.
PCT/CN2015/098284 2015-12-22 2015-12-22 Terminal mobile WO2017107057A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201580070394.0A CN107112633B (zh) 2015-12-22 2015-12-22 一种移动终端
PCT/CN2015/098284 WO2017107057A1 (fr) 2015-12-22 2015-12-22 Terminal mobile

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Application Number Priority Date Filing Date Title
PCT/CN2015/098284 WO2017107057A1 (fr) 2015-12-22 2015-12-22 Terminal mobile

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WO2017107057A1 true WO2017107057A1 (fr) 2017-06-29

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CN107968256A (zh) * 2017-11-20 2018-04-27 哈尔滨工程大学 一种小型多功能天线
CN108321518A (zh) * 2018-01-22 2018-07-24 哈尔滨工程大学 一种基于耦合加载的多频带天线
CN114976598A (zh) * 2022-06-01 2022-08-30 西安电子科技大学 应用于零净空移动终端的高隔离度倒l型天线对

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CN108565544B (zh) * 2018-04-20 2023-10-17 深圳市信维通信股份有限公司 一种超宽带5g mimo天线结构

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CN107968256A (zh) * 2017-11-20 2018-04-27 哈尔滨工程大学 一种小型多功能天线
CN108321518A (zh) * 2018-01-22 2018-07-24 哈尔滨工程大学 一种基于耦合加载的多频带天线
CN114976598A (zh) * 2022-06-01 2022-08-30 西安电子科技大学 应用于零净空移动终端的高隔离度倒l型天线对
CN114976598B (zh) * 2022-06-01 2023-10-31 西安电子科技大学 应用于零净空移动终端的高隔离度倒l型天线对

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