WO2015000146A1 - Réflecteur de signaux - Google Patents

Réflecteur de signaux Download PDF

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Publication number
WO2015000146A1
WO2015000146A1 PCT/CN2013/078747 CN2013078747W WO2015000146A1 WO 2015000146 A1 WO2015000146 A1 WO 2015000146A1 CN 2013078747 W CN2013078747 W CN 2013078747W WO 2015000146 A1 WO2015000146 A1 WO 2015000146A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal reflector
signal
reflector
transmitting end
present
Prior art date
Application number
PCT/CN2013/078747
Other languages
English (en)
Chinese (zh)
Inventor
蔡云龙
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 PCT/CN2013/078747 priority Critical patent/WO2015000146A1/fr
Publication of WO2015000146A1 publication Critical patent/WO2015000146A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a signal reflector.
  • High-frequency electromagnetic waves such as those with frequencies between 100 GHz and 3000 GHz, can be called terahertz signals (Terahertz, THz). Due to the very high frequency, the THz signal can have a free space attenuation of up to 80dB/m. In this way, since the indoor signal attenuation is very large, the antenna needs to provide about 36dBi (required at the transceiver end) gain to offset the free space loss. This results in a very narrow beam of the antenna, and the half power beam width (HPBW) is generally around 2 to 10 degrees.
  • THz terahertz signals
  • HPBW half power beam width
  • the inventors of the present invention found that since the THz beam is very narrow, the scheme of placing a planar reflector indoors can only be "illuminated" (the portion where the wireless signal can reach) A small part of the area. That is, when there is no direct path condition, the use of a planar reflector does not effectively cover more areas.
  • Embodiments of the present invention provide a signal reflector that can increase a coverage area of a communication signal when a terahertz signal does not have a direct path, thereby ensuring efficient communication.
  • a first aspect of the present invention provides a signal reflector, including:
  • At least one convex reflecting surface At least one convex reflecting surface
  • the convex reflecting surface comprises at least one reflecting segment surface, the length of the reflecting segment surface being associated with a half power lobe width of the transmitting end antenna and a maximum wavelength of electromagnetic waves emitted by the transmitting end.
  • the convex reflective surface includes a plurality of reflective segment surfaces
  • the reflective segment surface is a plane.
  • the number of reflective segment faces is associated with the half power lobe width.
  • the number of the reflective segment faces is inversely proportional to the half power lobe width.
  • the diameter of the signal reflector is half of the antenna of the transmitting end
  • the power lobe width is associated with the distance of the transmitting end from the signal reflector.
  • the diameter of the signal reflector is greater than or equal to twice the inverse tangent of half the width of the half power lobe.
  • any one of the first to third possible implementation manners of the first aspect in a sixth possible implementation, is not less than two of the maximum wavelengths Times.
  • the length of the reflective segment surface is between twice the maximum wavelength and five times the maximum wavelength.
  • the embodiment of the invention adopts a signal reflector, comprising: at least one convex reflecting surface, wherein the convex reflecting surface comprises at least one reflecting segment surface, the length of the reflecting segment surface and the half power lobe width of the transmitting end antenna and the The maximum wavelength correlation of the electromagnetic waves emitted by the transmitting end.
  • the convex structure of the signal reflector provided by the embodiment of the invention can increase the coverage area of the communication signal when the terahertz signal does not have a direct path, thereby ensuring high efficiency. Communication.
  • FIG. 1 is a schematic structural view of a signal reflector in an embodiment of the present invention
  • FIG. 2 is another schematic structural view of a signal reflector in an embodiment of the present invention.
  • 3 is another schematic structural view of a signal reflector in an embodiment of the present invention
  • 4 is another schematic structural view of a signal reflector in an embodiment of the present invention
  • FIG. 5 is a schematic diagram showing the principle of calculating the diameter of the reflector in the embodiment of the present invention.
  • FIG. 6 is another schematic structural diagram of a signal reflector in an embodiment of the present invention.
  • Fig. 7 is a schematic view showing another structure of a signal reflector in an embodiment of the present invention.
  • Embodiments of the present invention provide a signal reflector that can increase a coverage area of a communication signal when a terahertz signal does not have a direct path, thereby ensuring efficient communication. The details are described below.
  • FIG. 1 is a schematic structural diagram of a signal reflector according to an embodiment of the present invention.
  • the signal reflector includes: a convex reflecting surface 10, and the convex reflecting surface in FIG. 1 is semicircular.
  • the shape of the reflective surface 10 is not limited. For one, it can be multiple.
  • the lobe width is a very important parameter commonly used in directional antennas. It refers to the width of the angle between the antenna and the radiation pattern below the peak of 3dB.
  • the radiation pattern of the antenna It is an indicator for measuring the ability of an antenna to transmit and receive signals in all directions. It is usually expressed graphically as the relationship between power intensity and angle.
  • the angle between the power points of the two main halves is defined as the lobe width of the antenna pattern. It is called the half power (angle) width.
  • the narrower the main lobe width the better the directivity and the stronger the anti-interference ability.
  • the number of reflective segment faces is associated with the half power lobe width, for example: the number of reflective segment faces is inversely proportional to the half power lobe width.
  • HPBW 6
  • the reflector can have 180/ ⁇ blocks, each with an angle of beam width. Due to the divergence of electromagnetic waves, the reflector can cover the entire beam.
  • the reflecting surface in each block is a reflecting segment surface 101, and the length of the reflecting segment surface can be calculated according to the maximum wavelength of the electromagnetic wave emitted by the transmitting end.
  • the convex structure of the signal reflector provided by the embodiment of the invention can increase the coverage area of the communication signal when the terahertz signal does not have a direct path, thereby ensuring high efficiency. Communication.
  • the signal reflector shown in FIG. 2 includes three convex reflecting surfaces 10.
  • the number of convex reflecting surfaces 10 in one reflector is not limited, and may be one. Can be multiple.
  • the signal reflector shown in FIG. 3 includes a convex reflecting surface 10, and the convex reflecting surface 10 includes six reflecting segment faces 101, each reflecting segment face 101 being a flat surface instead of a convex surface, so that Reduce the difficulty of processing.
  • the signal reflector shown in Fig. 3 includes three convex reflecting faces 10, each of which includes six planar reflecting segment faces.
  • the number of the convex reflecting surfaces 10 in one reflector is not limited, and may be one or plural.
  • the diameter of the signal reflector is associated with the half power lobe width of the transmitting end antenna and the distance of the transmitting end from the signal reflector.
  • the reflector provided by the embodiment of the present invention is applicable to an indoor communication scenario, and the size of the Acess Point (AP) projected onto the transmitter is determined by the half power lobe width. Assuming that the AP-to-reflector distance is 3 ⁇ 5m and the electromagnetic wave half-lobe width is 2 degrees to 10 degrees, the maximum size of the electromagnetic wave projection area emitted by the AP is limited to: 17.5cm ⁇ 87cm. Taking the minimum electromagnetic wave projection area of 17.5 cm as an example, in order for the AP to be more likely to cover the reflector, the emitter is smaller than the projected area, and the reflector size can limit about half of the projection surface, that is, the diameter of the reflector is Below 7.6cm.
  • the length of the reflective segment surface is not less than twice the maximum wavelength, preferably twice Between five times the maximum wavelength.
  • the reflector needs to be sized to ensure effective reflection. Ideally, an approximately infinite plane is used to approximate the ideal reflection surface. The wireless large plane cannot be realized in practice.
  • the reflective surface with sufficient reflection effect can be selected according to the wavelength of the center frequency of the working electromagnetic wave.
  • the maximum wavelength of the electromagnetic wave in the embodiment of the present invention is the wavelength of the center frequency of the working electromagnetic wave.
  • the size of each reflecting segment surface of the reflector can be determined according to the wavelength.
  • the minimum can be 2
  • the multiple wavelength, ie 2 ⁇ can usually take a wavelength of 2 ⁇ 5 ⁇ , which is of course the lower limit. This ensures that there is sufficient area for reflection in addition to the edge scattering diffraction.
  • the convex structure of the signal reflector provided by the embodiment of the invention can increase the coverage area of the communication signal when the terahertz signal does not have a direct path, thereby ensuring high efficiency. Communication.

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  • Aerials With Secondary Devices (AREA)

Abstract

L'invention concerne un réflecteur de signaux, qui comprend au moins une surface réfléchissante convexe ; la surface réfléchissante convexe comprend au moins une partie réfléchissante, la longueur de la partie réfléchissante étant associée à la largeur de faisceau à mi-puissance (HPBW) de l'extrémité d'émission d'une antenne et à la longueur d'onde maximum d'une onde électromagnétique transmise par l'extrémité d'émission. La structure convexe du réflecteur de signaux, dans une forme de réalisation de la présente invention, permet d'accroître la zone de couverture de signaux de télécommunication quand les signaux térahertz (Thz) n'ont pas de visibilité directe (LOS), ce qui permet d'assurer une transmission efficace.
PCT/CN2013/078747 2013-07-03 2013-07-03 Réflecteur de signaux WO2015000146A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2013/078747 WO2015000146A1 (fr) 2013-07-03 2013-07-03 Réflecteur de signaux

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2013/078747 WO2015000146A1 (fr) 2013-07-03 2013-07-03 Réflecteur de signaux

Publications (1)

Publication Number Publication Date
WO2015000146A1 true WO2015000146A1 (fr) 2015-01-08

Family

ID=52143017

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2013/078747 WO2015000146A1 (fr) 2013-07-03 2013-07-03 Réflecteur de signaux

Country Status (1)

Country Link
WO (1) WO2015000146A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201174425Y (zh) * 2007-12-05 2008-12-31 中国人民解放军空军工程大学导弹学院 大功率超宽波束赋形天线
CN101853986A (zh) * 2010-05-24 2010-10-06 哈尔滨工业大学 一种基于形状记忆聚合物的可充气展开天线反射面及其反射表面片、蒙皮的制作方法
CN202092339U (zh) * 2011-05-31 2011-12-28 中海阳新能源电力股份有限公司 碟式二次反射环形聚光光热发电装置
CN102427167A (zh) * 2011-07-29 2012-04-25 中国兵器工业第二○六研究所 一种基于圆波导te01模的宽带e面全向天线

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201174425Y (zh) * 2007-12-05 2008-12-31 中国人民解放军空军工程大学导弹学院 大功率超宽波束赋形天线
CN101853986A (zh) * 2010-05-24 2010-10-06 哈尔滨工业大学 一种基于形状记忆聚合物的可充气展开天线反射面及其反射表面片、蒙皮的制作方法
CN202092339U (zh) * 2011-05-31 2011-12-28 中海阳新能源电力股份有限公司 碟式二次反射环形聚光光热发电装置
CN102427167A (zh) * 2011-07-29 2012-04-25 中国兵器工业第二○六研究所 一种基于圆波导te01模的宽带e面全向天线

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