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WO2018016705A1 - Antenne quadrifilaire comprenant un réflecteur - Google Patents

Antenne quadrifilaire comprenant un réflecteur Download PDF

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Publication number
WO2018016705A1
WO2018016705A1 PCT/KR2017/001354 KR2017001354W WO2018016705A1 WO 2018016705 A1 WO2018016705 A1 WO 2018016705A1 KR 2017001354 W KR2017001354 W KR 2017001354W WO 2018016705 A1 WO2018016705 A1 WO 2018016705A1
Authority
WO
WIPO (PCT)
Prior art keywords
reflector
antenna
angle
refiller
radiating elements
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/KR2017/001354
Other languages
English (en)
Korean (ko)
Inventor
성원모
김의선
김기호
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kespion Co Ltd
Original Assignee
EMW Co Ltd
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 EMW Co Ltd filed Critical EMW Co Ltd
Publication of WO2018016705A1 publication Critical patent/WO2018016705A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
    • H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
    • H01Q11/08—Helical antennas
    • 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
    • H01Q19/06—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 refracting or diffracting devices, e.g. lens
    • 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 embodiments below relate to a quad refiller antenna comprising a reflector.
  • Quad refiller antenna is a type of antenna used for satellite communication in a device such as a mobile terminal or a GPS receiver.
  • Quad refiller antennas provide circularly polarized radiation and are designed to have a quarter-wave or half-wavelength structure with shorted ends.
  • the quad refiller antenna is an electrical microantenna for providing circular polarization in the angular region of the blog.
  • Quad refiller antennas generally consist of four helices, each helix formed identically on the circumferential surface of a dielectric cylinder or dielectric disk support, each powered by a signal of the same amplitude with four phases applied do.
  • the quad refiller antenna In order to improve the axis angle of the quad refiller antenna, the quad refiller antenna is changed into a conical cylinder shape and the pitch of the hellis is changed. However, there is a limit in increasing the height of the quad refiller antenna or manufacturing the antenna.
  • Embodiments provide a technique for improving the axial ratio angle of a quad refiller antenna by implementing a reflector for at least one of reflection and diffraction of signals emitted from the plurality of radiating elements at a bottom of a main body having a plurality of radiating elements formed thereon. can do.
  • a quad refiller antenna includes a main body having a plurality of radiating elements formed thereon, and a reflector for at least one of reflection and diffraction of signals radiated from the plurality of radiating elements located at a lower end of the main body. can do.
  • the reflector may include a first surface and a second surface that forms a first angle with the first surface.
  • the second surface may be in the form of a cone.
  • the first angle may be 90 degrees or less.
  • the reflector may further include a third surface that forms a second angle with the second surface.
  • the second face may have a cylindrical shape
  • the third face may have a conical shape
  • the first angle and the second angle may be 90 degrees or less, and the second angle may be smaller than the first angle.
  • the antenna may further include a feeding circuit for feeding the plurality of radiating elements, and the feeding circuit may be implemented inside the reflector.
  • FIG. 1 is a schematic structural diagram of a quad refiller antenna according to an exemplary embodiment.
  • FIG. 2 is a schematic structural diagram of an example of the reflector shown in FIG. 1.
  • FIG. 3 is a diagram for describing reflection and diffraction of a signal by the reflector illustrated in FIG. 2.
  • FIG. 4A is an example of a graph for describing an axial ratio characteristic of a quad refiller antenna improved through the reflector of FIG. 2.
  • FIG. 4B is another example of a graph for explaining the axial ratio characteristics of the quad refiller antenna improved through the reflector of FIG. 2.
  • FIG. 5 is a schematic structural diagram of another example of the reflector shown in FIG.
  • FIG. 6 is a graph illustrating an axial ratio characteristic of a quad refiller antenna improved through the reflector of FIG. 5.
  • first or second may be used to describe various components, but the components should not be limited by the terms. The terms are only for the purpose of distinguishing one component from another component, for example, without departing from the scope of the rights according to the inventive concept, the first component may be called a second component, Similarly, the second component may also be referred to as the first component.
  • FIG. 1 is a schematic structural diagram of a quad refiller antenna according to an exemplary embodiment.
  • a quadrifilar antenna 100 may include a plurality of radiating elements 110, a main body 130, and a reflector 150.
  • the quad refiller antenna 100 may further include a power supply circuit 170.
  • the quad refiller antenna 100 may be implemented in a radio frequency identification (RFID), a global positioning system (GPS), a satellite, or the like.
  • RFID radio frequency identification
  • GPS global positioning system
  • the quad refiller antenna 100 may be implemented in a personal computer (PC), a data server, or a portable electronic device.
  • Portable electronic devices include laptop computers, mobile phones, smart phones, tablet PCs, mobile internet devices (MIDs), personal digital assistants (PDAs), enterprise digital assistants (EDAs). ), Digital still cameras, digital video cameras, portable multimedia players (PMPs), personal navigation devices or portable navigation devices (PNDs), handheld consoles, e-books ( It may be implemented as an e-book or a smart device.
  • the smart device may be implemented as a smart watch or a smart band.
  • the plurality of radiation elements 110 may emit radiation signals in response to the feed signals transmitted from the power supply circuit 170.
  • the plurality of radiating elements 110 may be electrically connected to the power supply circuit 170.
  • the plurality of radiating elements 110 may be formed in the main body 130.
  • the plurality of radiating elements 110 may be formed in a helix structure.
  • the plurality of radiating elements 110 may be formed in various shapes such as a straight line and an oblique line.
  • the plurality of radiating elements 110 may be electrically connected, and a distance between the plurality of radiating elements may be constant.
  • the plurality of radiating elements 110 may be formed by plating or printing a radiation pattern on the main body 130, or may be formed by plating, printing, or injection after forming a negative position of the radiation pattern.
  • the main body 130 may be implemented in various forms such as cylindrical, square, polygonal, and the like.
  • the main body 130 may be implemented through various media such as dielectric, PCB, air, ceramic, and the like.
  • the reflector 150 may be positioned at the bottom of the main body 130 and may reflect or diffract radiation signals emitted from the plurality of radiating elements 110. That is, the reflector 150 may be for at least one of half-time and diffraction of the radiation signals emitted from the plurality of radiating elements 110.
  • the quad refiller antenna 100 may extend an axial ratio characteristic, for example, an axial ratio through the reflector 150. By improving the axial ratio characteristics of the quadrefill antenna 100, the radiation pattern and / or the gain of the quadrefill antenna 100 can be improved.
  • the quadrefill antenna 100 may be miniaturized. As a result, the manufacturing cost of the quad refiller antenna 100 may also be reduced.
  • the feed circuit 170 may transmit feed signals to the plurality of radiating elements 110. That is, the power supply circuit 170 may power the plurality of radiating elements 110 through the power supply signals.
  • the feed signals may be signals having a phase difference.
  • the feed signals may be generated from the feed circuit 170, but are not necessarily limited thereto.
  • the feed signals may be power (or current or voltage) supplied from the outside. That is, the power supply circuit 170 may power the radiating elements 110 by receiving power, for example, feed signals from the outside.
  • the power supply circuit 170 may be implemented inside the reflector 150. Accordingly, the quad refiller antenna 100 may be miniaturized.
  • FIG. 2 is a schematic structural diagram of an example of the reflector shown in FIG. 1
  • FIG. 3 is a view for explaining reflection and diffraction of a signal by the reflector shown in FIG. 2
  • FIG. 4A is improved through the reflector of FIG. 2.
  • FIG. 4B is another example of a graph for describing the axial ratio characteristic of the quadrifilter antenna improved through the reflector of FIG. 2.
  • the reflector 150 may include a first plane 151 and a second plane 153.
  • the first surface 151 may mean an upper surface of the reflector 150
  • the second surface 153 may mean a side surface of the reflector 150.
  • the first surface 151 may have a first angle ⁇ w with the second surface 153. That is, the reflector 150 may be implemented such that the first surface 151 forms the first angle ⁇ w with the second surface 153.
  • the second surface 153 may be implemented in the form of a cone, and the first angle ⁇ w may be 90 degrees or less.
  • the reflector 150 may be implemented in a cylindrical shape or a cone shape. That is, although the reflector 150 is illustrated in the form of a cone in FIG. 2, the present disclosure is not limited thereto, and the reflector 150 may be implemented in a cylindrical form.
  • the back radiation of the quad refiller antenna 100 is simplified and described for convenience of description of the radiation and diffraction of the source (eg, a signal) by the reflector 150.
  • the source of the half period 150 is at the height of the quad refiller antenna 100, for example, the height H_A of the main body 130 in which the plurality of radiating elements 110 are formed. It may be incident on the first surface 151.
  • the source may mean a radiation signal radiated from the plurality of radiating elements 110.
  • the reflection shadow area, the incident shadow area, and the observation point of the reflected field in the quad refiller antenna 100 may be determined according to the incident angle ⁇ i of the source and the size of the radius R_U of the reflector 150.
  • the radius R_U of the reflector 150 refers to the radius of the first surface 151.
  • the magnitude and direction of the diffraction wave may be determined according to the incident angle ⁇ i of the source and the first angle ⁇ w, which is a wedge angle.
  • the first angle ⁇ w which is a wedge angle, may be expressed by Equation 1.
  • the incident angle ⁇ i at which the rear field is incident on the reflector 150 may be expressed by Equation 2 below.
  • the first angle ⁇ w is 90 degrees.
  • the reflector 150 may be a cylindrical reflector.
  • the angle of incidence ⁇ i of the rear radiation incident from the quad refiller antenna 100 decreases as the radius R_U of the first surface 151 increases, thereby increasing the reflection area. It can be seen that the axial ratio angle of the quad refiller antenna 100 increases. As another example, when the radius R_L of the second surface 153 decreases, the first angle ⁇ 1 may decrease to 90 degrees or less. Can be. In this case, the reflector 150 may be a conical reflector.
  • the axial ratio due to the diffraction wave may be improved as the first angle ⁇ 1 of the reflector 150 decreases.
  • the axial ratio due to the diffraction wave is greatly improved at the first angle ⁇ w at 80 degrees.
  • the radius R_U of the reflector 150 should be larger than the height H_A of the quadrefiller antenna 100.
  • the first angle ⁇ w which is the wedge angle, is made small. It can be seen that the axial ratio of the quad refiller antenna 100 can be improved.
  • the incidence angle ⁇ i of the rear radiation incident from the quad refiller antenna 100 decreases as the radius R_U of the first surface 151 increases, and thus, the reflection area becomes wider, thereby increasing the width of the quad refill antenna 100. It can be seen that the axial angle increases.
  • FIG. 5 is a schematic structural diagram of another example of the reflector shown in FIG. 1, and FIG. 6 is a graph for explaining the axial ratio characteristics of the quad refiller antenna improved through the reflector of FIG. 5.
  • the reflector 150 may include a first plane 151, a second plane 153, and a third plane 155.
  • the first surface 151 may mean an upper surface of the reflector 150
  • the second surface 153 and the third surface 155 may mean a side surface of the reflector 150.
  • the second surface 153 may be positioned at the upper portion
  • the third surface 155 may be positioned at the lower portion.
  • the first surface 151 may have a first angle ⁇ w with the second surface 153.
  • the second surface 153 may form a second angle ⁇ w ′ with the third surface 155. That is, in the reflector 150, the first surface 151 forms the first angle ⁇ w with the second surface 153, and the second surface 153 has the third surface 155 with the second angle ⁇ w '.
  • the first angle ⁇ w and the second angle ⁇ w ' may be less than or equal to 90 degrees, and the second angle ⁇ w' may be smaller than the first angle ⁇ w.
  • the second face 153 may have a cylindrical shape
  • the third face 155 may have a conical shape.
  • the first angle ⁇ w is vertical (eg, 90 degrees) and the second angle. ( ⁇ w ') may be 90 degrees or less. That is, the reflector 150 may be implemented in the form of a combination of a cylinder and a cone.
  • the axial ratio characteristic of the quadrefill antenna 100 may be good.
  • the wedge angle of the second angle ⁇ w ' may be expressed as shown in Equation 3.
  • the reflector 150 shown in FIG. 5 is the same as the half-fiber 150 shown in FIG. 2, but the height of the second surface 153 is different.
  • the second angle ⁇ w ' may decrease.
  • the first diffraction occurs at the first surface 151 of the reflector 150, and the second surface 153 and the third surface 155 meet by a field flowing along the second surface 153.
  • Secondary diffraction may occur where a wedge, i.e., a second angle ⁇ w 'occurs.
  • the source may mean a radiation signal radiated from the plurality of radiating elements 110.
  • the axial ratio due to the diffraction wave may be improved as the height H_M of the second surface 153 increases and the second angle ⁇ w ', which is a wedge angle, decreases.
  • the axial ratio due to the diffraction wave is greatly improved at the second angle ⁇ w 'at 80 degrees.
  • the axial ratio characteristic of the quad refiller antenna 100 may be good.
  • the reflector of the reflector 150 of FIG. 5 may further reduce the width, that is, the radius R_U, in comparison with the reflector 150 of FIG. 2, which may be better for miniaturization of the quad refiller antenna 100.
  • the apparatus described above may be implemented as a hardware component, a software component, and / or a combination of hardware components and software components.
  • the devices and components described in the embodiments are, for example, processors, controllers, arithmetic logic units (ALUs), digital signal processors, microcomputers, field programmable gate arrays (FPGAs).
  • ALUs arithmetic logic units
  • FPGAs field programmable gate arrays
  • PLU programmable logic unit
  • the processing device may execute an operating system (OS) and one or more software applications running on the operating system.
  • the processing device may also access, store, manipulate, process, and generate data in response to the execution of the software.
  • processing device includes a plurality of processing elements and / or a plurality of types of processing elements. It can be seen that it may include.
  • the processing device may include a plurality of processors or one processor and one controller.
  • other processing configurations are possible, such as parallel processors.
  • the software may include a computer program, code, instructions, or a combination of one or more of the above, and configure the processing device to operate as desired, or process it independently or collectively. You can command the device.
  • Software and / or data may be any type of machine, component, physical device, virtual equipment, computer storage medium or device in order to be interpreted by or to provide instructions or data to the processing device. Or may be permanently or temporarily embodied in a signal wave to be transmitted.
  • the software may be distributed over networked computer systems so that they may be stored or executed in a distributed manner.
  • Software and data may be stored on one or more computer readable recording media.
  • the method according to the embodiment may be embodied in the form of program instructions that can be executed by various computer means and recorded in a computer readable medium.
  • the computer readable medium may include program instructions, data files, data structures, etc. alone or in combination.
  • the program instructions recorded on the media may be those specially designed and constructed for the purposes of the embodiments, or they may be of the kind well-known and available to those having skill in the computer software arts.
  • Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks.
  • Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like.
  • the hardware device described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

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Abstract

L'invention concerne une antenne quadrifilaire comprenant un réflecteur. Selon un mode de réalisation, l'antenne quadrifilaire comprend: un corps principal comportant une pluralité d'éléments rayonnants; et le réflecteur situé à l'extrémité inférieure du corps principal pour réfléchir et/ou diffracter les signaux émis par la pluralité d'éléments rayonnants.
PCT/KR2017/001354 2016-07-18 2017-02-08 Antenne quadrifilaire comprenant un réflecteur Ceased WO2018016705A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2016-0090801 2016-07-18
KR1020160090801A KR101700560B1 (ko) 2016-07-18 2016-07-18 반사기를 포함하는 쿼드리필러 안테나

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WO2018016705A1 true WO2018016705A1 (fr) 2018-01-25

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019216692A1 (fr) * 2018-05-10 2019-11-14 주식회사 이엠따블유 Dispositif d'antenne quadrifilaire
KR102564345B1 (ko) * 2021-09-13 2023-08-08 김영준 입체형 엔엑스 안테나

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5635945A (en) * 1995-05-12 1997-06-03 Magellan Corporation Quadrifilar helix antenna
KR20060059162A (ko) * 2004-07-28 2006-06-01 스카이크로스 인코포레이티드 핸드셋 쿼드리파일러 나선형 안테나 기계적 구조들
KR20070009062A (ko) * 2005-07-15 2007-01-18 아주대학교산학협력단 알에프아이디 리더용 다각형 헬릭스 안테나
KR20090117945A (ko) * 2007-04-27 2009-11-16 닛본 덴끼 가부시끼가이샤 금속벽을 구비한 패치안테나
KR20120001409A (ko) * 2010-06-29 2012-01-04 한국항공대학교산학협력단 이중 원형 편파 턴스타일 안테나

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5635945A (en) * 1995-05-12 1997-06-03 Magellan Corporation Quadrifilar helix antenna
KR20060059162A (ko) * 2004-07-28 2006-06-01 스카이크로스 인코포레이티드 핸드셋 쿼드리파일러 나선형 안테나 기계적 구조들
KR20070009062A (ko) * 2005-07-15 2007-01-18 아주대학교산학협력단 알에프아이디 리더용 다각형 헬릭스 안테나
KR20090117945A (ko) * 2007-04-27 2009-11-16 닛본 덴끼 가부시끼가이샤 금속벽을 구비한 패치안테나
KR20120001409A (ko) * 2010-06-29 2012-01-04 한국항공대학교산학협력단 이중 원형 편파 턴스타일 안테나

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