WO2019128839A1 - Carte de circuit imprimé et dispositif de communication - Google Patents

Carte de circuit imprimé et dispositif de communication Download PDF

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Publication number
WO2019128839A1
WO2019128839A1 PCT/CN2018/122327 CN2018122327W WO2019128839A1 WO 2019128839 A1 WO2019128839 A1 WO 2019128839A1 CN 2018122327 W CN2018122327 W CN 2018122327W WO 2019128839 A1 WO2019128839 A1 WO 2019128839A1
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WO
WIPO (PCT)
Prior art keywords
antenna
trap
pcb board
present application
ifa
Prior art date
Application number
PCT/CN2018/122327
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English (en)
Chinese (zh)
Inventor
马良
秦卫星
刘杰
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 WO2019128839A1 publication Critical patent/WO2019128839A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • 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
    • H01Q1/48—Earthing means; Earth screens; Counterpoises
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10098—Components for radio transmission, e.g. radio frequency identification [RFID] tag, printed or non-printed antennas

Definitions

  • the present application relates to the field of electronic devices and, more particularly, to a PCB board and communication device.
  • Wi-Fi Wireless Fidelity
  • terminal devices such as personal computers and handheld devices (such as tablets and mobile phones).
  • Wi-Fi devices have become indispensable in our lives. The device, how to make the Wi-Fi device have a better performance experience, puts forward new requirements for the design of the antenna in the Wi-Fi device.
  • the vertical gateway can be placed with a conventional dipole antenna to achieve omnidirectional coverage because the height of both sides is not limited.
  • a wireless access point (AP) or terminal device with a flat attitude is highly limited, and a conventional dipole antenna cannot be placed.
  • IFA Inverted-F Antennas
  • PCB printed circuit board
  • the present application provides a PCB board and communication device that helps eliminate the zero point of the horizontal plane by introducing a wavetrap near the feed point, thereby improving the user experience.
  • a PCB board in a first aspect, includes a first planar inverted-F antenna and a first trap, wherein a first end of the first trap and a feed of the first planar inverted-F antenna The electrical pins are electrically connected.
  • the second end of the first trap is suspended.
  • the PCB board of the embodiment of the present application helps the PCB ground current to be released by connecting the feeding pin of the IFA antenna to the trap, thereby helping to eliminate the zero point of the water level and improving the user experience.
  • the first end of the first trap is connected to the first end of the switch, and the second end of the switch and the first planar inverted F antenna The feed pins are connected.
  • the PCB board of the embodiment of the present application can close the switch when the omnidirectional characteristic of the IFA antenna needs to be reached by the switch at the beginning of the trap, so that the PCB ground current is released along the low impedance region; or when the maximum gain of the antenna is required, Turn the switch on to implement switch switching control.
  • the feed pin of the first IFA antenna is connected to the first end of the switch, the second end of the switch is connected to the first end of the inductor, and the second end of the inductor is connected to the first notch. The first end of the device.
  • the first end of the first trap is connected to the first end of the inductor, and the second end of the inductor and the first plane inverted F antenna The feed pins are connected.
  • the PCB board of the embodiment of the present application contributes to miniaturization of the trap by connecting an inductor at the beginning of the trap.
  • the second end of the first trap is coupled to the first end of the capacitor, and the second end of the capacitor is coupled to ground.
  • the PCB board of the embodiment of the present application contributes to miniaturization of the trap by connecting a capacitor at the end of the trap.
  • the PCB further includes a second planar inverted-F antenna and a second notch, the first end of the second trap and the second The feed pins of the planar inverted F antenna are connected.
  • the PCB board of the embodiment of the present application is suitable for a 2*2 multiple input multiple output MIMO device by respectively connecting a notch filter on the feeding pins of the two IFA antennas.
  • a distance between a feeding pin of the first planar inverted-F antenna and a feeding pin of the second planar inverted-F antenna is greater than or equal to the first Distance threshold.
  • the horizontal arm direction of the first planar inverted-F antenna is at a predefined angle to the first notch length direction.
  • the length of the first trap is determined according to an operating frequency band of the first planar inverted-F antenna.
  • the first trap is a branched structure or a three-dimensional structure.
  • a communication device comprising the first aspect and the PCB board in any of the possible implementations of the first aspect.
  • the communication device is a terminal device. In some possible implementations, the communication device is a home gateway device.
  • FIG. 1 is a physical diagram of a PCB board of an embodiment of the present application.
  • FIG. 2 is a schematic view of a PCB board of an embodiment of the present application.
  • Figure 3 is an S11 curve of an IFA antenna.
  • Figure 4 shows the current distribution of the PCB at 2.45 GHz.
  • FIG. 5 is a horizontal plane diagram of an IFA antenna according to an embodiment of the present application.
  • Figure 6 is a plan view showing the distance of the trap from the ground.
  • FIG. 7 is another horizontal plane diagram of the IFA antenna of the embodiment of the present application.
  • Figure 8 is a horizontal plan view of different PCB board sizes in accordance with an embodiment of the present application.
  • FIG. 9 is a schematic plan view of a PCB board according to an embodiment of the present application.
  • FIG. 10 is another schematic plan view of a PCB board according to an embodiment of the present application.
  • FIG. 11 is still another schematic plan view of a PCB board according to an embodiment of the present application.
  • FIG. 12 is another physical diagram of a PCB board of an embodiment of the present application.
  • FIG. 13 is still another physical diagram of the PCB board of the embodiment of the present application.
  • Figure 14 is an S11/S21 curve of two antennas.
  • Figure 15 is a horizontal view of two antennas.
  • Figure 16 is another horizontal pattern of the two antennas
  • 17 is another schematic diagram of a PCB board of an embodiment of the present application.
  • FIG. 18 is still another schematic diagram of a PCB board according to an embodiment of the present application.
  • the technical solution of the embodiment of the present application can be applied to a Wi-Fi device in a flat posture, and can also be applied to other small terminal products, such as a home gateway and a customer premise equipment (CPE).
  • CPE customer premise equipment
  • the terminal device in the embodiment of the present application may refer to a user equipment, an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or User device.
  • the terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), with wireless communication.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • the PCB board includes a first planar inverted-F antenna and a first trap, wherein the first trap is One end is electrically connected to a feed pin of the first planar inverted-F antenna.
  • first end of the first trap can be soldered to the feed pins of the first planar inverted-F antenna or otherwise electrically connected.
  • the second end of the first trap may be suspended or may be connected to the first end of the capacitor, the second end of the capacitor being grounded.
  • the trap of the embodiment of the present application may also be referred to as an "associated structure", which functions to bind the ground current of the PCB board.
  • PCB board of the embodiment of the present application helps to tie the ground current of the PCB board through the associated structure by connecting the feed pin and the associated structure.
  • the PCB board consists of a common steel plate insert IFA antenna (one plug is a ground pin (PIN) and the other is a signal feed PIN) and a trap, which is simple and easy to implement.
  • first IFA antenna and the first trap can be printed on the PCB or soldered on the PCB, which is not limited in this application.
  • the length of the notch is determined according to a frequency band of the first planar inverted-F antenna.
  • the trap is one quarter wavelength in length.
  • the length of the trap is a quarter wavelength, wherein the wavelength is calculated as shown in the following formula (1):
  • ⁇ represents the wavelength
  • ⁇ represents the speed of light
  • f represents the operating frequency of the IFA antenna
  • FIG. 2 shows a schematic diagram of a PCB board according to an embodiment of the present application.
  • the current distribution helps to improve the omnidirectional characteristics of the IFA antenna.
  • the blank portion shown in FIG. 2 is a non-conductive region, the shaded portion is a conductive region (except for the trap), and the "off-ground distance" refers to the length of the non-conductive region between the trap and the conductive region.
  • Figure 3 shows the S11 curve of the IFA antenna (the abscissa represents the frequency). As can be seen from Figure 3, the IFA antenna can operate at 2.4-2.5 GHz and the bandwidth of the antenna is wide.
  • the operating frequency of the IFA is determined to be 2.5 GHz, and the speed of light is determined to be 3 ⁇ 10 8 m/s, and the wavelength of 120 mm can be obtained, and the quarter air wavelength is 30 mm.
  • the medium wavelength is the air wavelength divided by the root dielectric constant
  • the common PCB medium is FR4
  • the dielectric constant is 4.4
  • Figure 4 shows the current distribution of the PCB at 2.45GHz. It can be seen from the current distribution that the quarter-wavelength trap conforms to the resonant structure principle and is in a low-impedance state, which causes the PCB current to be released nearby, weakening the original length.
  • the current distribution of the side, and the quarter-wavelength trap and the IFA horizontal arm current are in the same direction, which can produce a horizontal polarization pattern of the lateral dipole, and the longitudinal branch of the remaining IFA antenna can generate a vertical dipole Vertical polarization pattern.
  • a trap is introduced near the IFA antenna feed pin (where the near-end current is strongest), and the trap forms a low-impedance region, so that the current of the PCB board is released near the low-impedance region, weakening
  • the current distribution of the original PCB board edge Moreover, the quarter branch and the IFA antenna horizontal arm current are in the same direction, producing a horizontal polarization pattern of the lateral dipole, and the remaining IFA longitudinal branch produces a vertical polarization pattern of the vertical dipole, thereby improving the full IFA antenna.
  • FIG. 5 shows an IFA antenna horizontal plane pattern according to an embodiment of the present application.
  • the minimum gain can reach -1.5 dBi compared to no trap (the PCB only includes the IFA antenna). Increased by 1.5dB and the average level gain increased by 2.2dB.
  • the dipole antenna principle can be used to explain that the unequal-length dipole pattern is controlled by the long arm traction (the edge of the PCB board is more Multi-current), the maximum gain is in the long arm direction, the maximum gain of the antenna is 5.6dBi, the minimum gain of the horizontal plane is -3dBi, there are three zero points, and the overall omnidirectionality is poor.
  • the performance of the IFA antenna is tested when the trap is 4 mm from the ground.
  • the performance of the IFA antenna is tested.
  • Fig. 6 is a plan view showing the distance of the trap from the ground. As shown in Fig. 6, the ground distance D of the trap is increased from 4 mm to 8 mm in Fig. 2.
  • FIG. 7 illustrates another horizontal plane pattern of an IFA antenna according to an embodiment of the present application. As shown in FIG. 7, the omnidirectional performance of the IFA antenna is better after the ground distance is increased from 4 mm to 8 mm.
  • the trap of the embodiment of the present application can increase the overall omnidirectional performance of the IFA antenna within a certain range, but the overall omnidirectional performance of the IFA antenna changes after exceeding a certain distance threshold. It tends to be flat.
  • ground clearance of the notch of the embodiment of the present application is related to the size (L1 and L2) of the IFA antenna, and that there are different optimal ground clearances for different sizes of IFA antennas.
  • the first end of the first trap is connected to the first end of the switch, and the second end of the switch is connected to the feed pin of the first planar inverted-F antenna.
  • first end and the second end of the first trap are the same, and the feed pin of the first IFA antenna is connected to the first end of the switch, and the second end of the switch is connected to the first notch.
  • the first end of the first trap is suspended; or the first end of the first trap is connected to the first end of the capacitor, and the second end of the capacitor is grounded.
  • FIG. 9 shows a schematic plan view of a PCB board (an IFA antenna is not shown in FIG. 9) according to an embodiment of the present application.
  • the start end of the switch can be connected to the beginning of the switch, and the end of the switch is connected to the feed of the IFA antenna. Electrical pin for switching control.
  • the switch is terminated at the beginning of the trap, and the switch can be closed when the omnidirectional characteristic of the IFA antenna needs to be achieved, so that the PCB ground current is released along the low impedance region; or when the maximum gain of the antenna is required,
  • the switch is turned on to implement switching control.
  • the first end of the first trap is connected to the first end of the inductor, and the second end of the inductor is connected to the feed pin of the first planar inverted-F antenna.
  • FIG. 10 shows another schematic diagram of a PCB board (the IFA antenna is not shown in FIG. 10) according to an embodiment of the present application.
  • the beginning of the inductor can be connected at the beginning of the trap, and the end of the inductor is connected to the IFA antenna. Feed pin.
  • the size of the trap can be reduced.
  • the optimal length of the trap is 20 mm, and after the inductor is added, the length can be reduced to 15 mm. Omnidirectional performance of IFA antennas.
  • the PCB board of the embodiment of the present application is connected to the inductor at the beginning of the trap, which contributes to miniaturization of the trap.
  • the second end of the first trap is connected to the first end of the capacitor, and the second end of the capacitor is grounded.
  • FIG. 11 shows a further schematic plan view of the PCB board (the IFA antenna is not shown in FIG. 11) according to an embodiment of the present application.
  • the end of the capacitor may be connected to the end of the trap, and the end of the capacitor is grounded.
  • the start of the trap can be connected to the switch and the inductor at the same time, or at the same time, the capacitor can be connected at the end of the trap.
  • the trap is a three-dimensional structure.
  • FIG. 12 shows another physical diagram of a PCB board in accordance with an embodiment of the present application. As shown in FIG. 12, the trap is a three-dimensional structure.
  • FIG. 13 illustrates still another physical diagram of a PCB board according to an embodiment of the present application.
  • the PCB board further includes a second planar inverted-F antenna and a second notch, wherein the second notch The first end of the device is electrically connected to the feed pin of the second planar inverted-F antenna, and the second end of the second notch is grounded.
  • the PCB board is converted from a single antenna to a dual antenna based on FIG. 1, and is suitable for a 2*2 Multiple Input Multiple Output (MIMO) device.
  • MIMO Multiple Input Multiple Output
  • IFA antennas of the PCB is not limited to one or two, and there may be more IFA antennas and traps, which are not enumerated here.
  • a distance between a feeding pin of the first planar inverted-F antenna and a feeding pin of the second planar inverted-F antenna is greater than or equal to a first distance threshold.
  • a certain distance should be maintained between any two IFA antennas to ensure isolation between the two IFA antennas.
  • Figure 14 shows the S11/S21 curve of the two antennas (S parameter represents the S parameter).
  • S parameter represents the S parameter.
  • the two antennas can cover 2.4 GHz and the isolation is greater than 14 dBi, which is satisfactory.
  • Fig. 15 shows a horizontal pattern of the two antennas. As can be seen from Fig. 15, both the first IFA antenna and the second IFA antenna have better omnidirectional characteristics.
  • Table 1 shows the performance test results of two antennas.
  • One AP product is selected, the PCB size is 180*125*1mm, and the Wi-Fi antenna unit is in the form of a steel insert IFA.
  • the antenna length is 25mm and the height is 15mm.
  • 16 illustrates another horizontal pattern of two antennas in accordance with an embodiment of the present application.
  • the Wi-Fi antenna selects a single frequency mode operating at 2.4 GHz.
  • the measured gain is 3dBi
  • the minimum gain of the horizontal plane is -2.86dBi
  • the omnidirectionality is better.
  • the efficiency in Table 1 is the ratio of the IFA antenna input energy to the output energy, and the gain is a 3D gain.
  • a trap is introduced near the feeding pin of the IFA antenna, and the low impedance state is presented nearby, so that the current of the PCB ground is released, and the current distribution of the long side is weakened.
  • the trap and the IFA horizontal arm current are in the same direction, producing a horizontal polarization pattern of the lateral dipole.
  • the vertical branch of the remaining IFA is generated, and the vertical polarization pattern of the vertical dipole is used; the omnidirectional effect is achieved; the entire scheme is simple, and no additional cost is introduced.
  • the introduced trap is a branch or a groove, and its orientation can be the same as the IFA horizontal arm according to design requirements.
  • the dipole-like omnidirectional characteristic it can also control its angle or length so that it exhibits multi-polarization characteristics.
  • FIG. 18 shows still another schematic diagram of a PCB board according to an embodiment of the present application, which can realize miniaturization of the trap by means of bending, loading, three-dimensional and structural conformal.
  • the embodiment of the present application further provides a communication device, which includes any one of the above PCB boards.
  • the communication device is a terminal device.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present application which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. .

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
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Abstract

La présente invention concerne une carte de circuit imprimé et un dispositif de communication. La carte de circuit imprimé comprend une première antenne plane en F inversé et un premier piège à ondes, une première borne du premier piège à ondes étant électriquement connectée à une broche d'alimentation de la première antenne plane en F inversé. La carte de circuit imprimé selon les modes de réalisation de la présente invention, en connectant le piège à ondes à la broche d'alimentation de l'antenne en F inversé, permet à un courant de mise à la masse de la carte de circuit imprimé d'être libéré à proximité, ce qui facilite l'élimination d'un point zéro d'un plan horizontal, et améliore l'expérience de l'utilisateur.
PCT/CN2018/122327 2017-12-29 2018-12-20 Carte de circuit imprimé et dispositif de communication WO2019128839A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201711475940.6A CN109996388A (zh) 2017-12-29 2017-12-29 一种pcb板和通信装置
CN201711475940.6 2017-12-29

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WO2019128839A1 true WO2019128839A1 (fr) 2019-07-04

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101283478A (zh) * 2005-10-10 2008-10-08 莱尔德技术股份有限公司 设置有陷波器的天线结构
CN102656744A (zh) * 2009-12-17 2012-09-05 莱尔德技术股份有限公司 天线构造及其便携式无线电通信设备
CN103891043A (zh) * 2011-10-31 2014-06-25 索尼爱立信移动通讯有限公司 采用多频带陷波器的多输入多输出（mimo）天线
CN107210517A (zh) * 2015-01-13 2017-09-26 索尼公司 用于无线电子装置的具有多个陷波器的双频带倒f型天线

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101283478A (zh) * 2005-10-10 2008-10-08 莱尔德技术股份有限公司 设置有陷波器的天线结构
CN102656744A (zh) * 2009-12-17 2012-09-05 莱尔德技术股份有限公司 天线构造及其便携式无线电通信设备
CN103891043A (zh) * 2011-10-31 2014-06-25 索尼爱立信移动通讯有限公司 采用多频带陷波器的多输入多输出（mimo）天线
CN107210517A (zh) * 2015-01-13 2017-09-26 索尼公司 用于无线电子装置的具有多个陷波器的双频带倒f型天线

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