WO2001024315A1 - Antenne en helice - Google Patents

Antenne en helice Download PDF

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Publication number
WO2001024315A1
WO2001024315A1 PCT/JP2000/006410 JP0006410W WO0124315A1 WO 2001024315 A1 WO2001024315 A1 WO 2001024315A1 JP 0006410 W JP0006410 W JP 0006410W WO 0124315 A1 WO0124315 A1 WO 0124315A1
Authority
WO
WIPO (PCT)
Prior art keywords
helical
antenna
winding
elements
helical antenna
Prior art date
Application number
PCT/JP2000/006410
Other languages
English (en)
Japanese (ja)
Inventor
Jinichi Inoue
Original Assignee
Nippon Antena Kabushiki Kaisha
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 Nippon Antena Kabushiki Kaisha filed Critical Nippon Antena Kabushiki Kaisha
Priority to EP00961109A priority Critical patent/EP1150382A1/fr
Publication of WO2001024315A1 publication Critical patent/WO2001024315A1/fr

Links

Classifications

    • 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
    • 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

Definitions

  • the present invention relates to a helical antenna suitable for mounting on satellite communication equipment. Akira Background technology
  • Non-geostationary mobile satellite communication systems include systems that use satellites in low and medium altitude orbits, systems that use satellites in oblong orbits, and systems that use tilt-synchronous orbits.
  • the LEO (Low Earth Orbit) communication system is one of the systems that use non-geostationary satellites in low or medium altitude orbits. This LEO communication system is considered to be a system with a small propagation delay time, and has the advantage of reducing the transmission power of the terminal and facilitating the miniaturization and weight reduction of the terminal because the propagation loss is reduced. are doing.
  • LEO communication systems include two types: LEO (Little LEO) for data transmission only, and LEO (Big LEO) for voice transmission.
  • LEO Large LEO
  • large LEOs are the Iridium system and the ICO (Intermediate Circular Orbit) system (Project 21).
  • the Iridium 'system is based on the TDMA (Time Division Multiple Access) system using 1.6 GHz frequency band, and was launched at an altitude of 780 km to cover the entire earth (66 + 6) Communication is performed using non-geostationary satellites.
  • the non-geostationary satellites are orbiting at 30 ° longitude intervals.
  • the ICO system has six orbiting satellites arranged in a 10390 km orthogonal oblique orbit, and the mobile terminal can share the satellite-based network using satellites with the existing terrestrial mobile phone system.
  • C is a possible dual terminal
  • the terminal can be made portable. Therefore, if you carry a portable radio for a satellite mobile communication system, you will be able to make real-time calls and data transmissions with telephones and mobile phones all over the world.
  • circularly polarized waves are used so as to be suitable for portable radios.
  • helical antennas and microstrip antennas capable of transmitting and receiving circularly polarized waves are used because they need to receive circularly polarized waves.
  • FIG. 6 is a diagram showing the configuration of the helical antenna 100
  • FIG. 7 is a developed view of the antenna main body 102 developed.
  • the helical antenna 100 is composed of an insulating cylindrical antenna body 102 and a helical element 111 provided on the outer peripheral surface of the antenna body 102. It is composed of a phase delay circuit 103 including a matching circuit for feeding power with a delayed phase to 112, 113 and 114, and a feeder 104.
  • the antenna body 102 having four helical elements 1 1 1 1 to 1 14 When the antenna body 102 having four helical elements 1 1 1 1 to 1 14 is expanded, it becomes as shown in Fig. 7, and the four helical elements 1 1 1 1 to 1 1 4 each have a winding angle ct. It can be seen that it is wound around the antenna body 102.
  • the winding start ends of the four helical elements 1 1 1 to 1 14 are a, b, c, d, respectively, and the winding end ends are a ', b', c ', d', respectively. .
  • the winding start ends a, b, c, and d are arranged at equal intervals (approximately 90 °), and the winding start ends a, b, c, and d are provided with a phase delay circuit 103 including a matching circuit.
  • the signal from the power supply unit 104 delayed by a predetermined amount of phase is supplied. For example, at the beginning of winding a, a signal delayed by 0 °, at the beginning of winding b, a signal delayed by 270 °, at the beginning of winding c, a signal delayed by 180 °, At the beginning d, a signal delayed by 90 ° is supplied.
  • the overall length ho of the antenna body 102 becomes long due to its configuration, and when applied to a portable device of a satellite mobile communication system, the overall configuration becomes large. There was a problem.
  • the present invention provides a miniaturized helical antenna with excellent portability when installed in portable equipment of a satellite mobile communication system. It is an object. Disclosure of the invention
  • a helical antenna according to the present invention is a helical antenna including a plurality of helical elements wound helically on the outer peripheral surface of a cylindrical insulating antenna body.
  • Each of the plurality of helical elements having a helical shape having a predetermined winding angle is bent and formed into a periodic wave shape having the winding angle wire having the winding angle as a center line.
  • each helical element may be a triangular wave.
  • each helical element may be a sine wave.
  • each helical element of the plurality of helical elements is formed by being bent into a periodic wave shape having the winding angle wire having the winding angle as the center line.
  • the overall length of the antenna body can be shortened.
  • the helical antenna can be reduced in size, and a helical antenna suitable for mounting on a portable device of a satellite mobile communication system can be obtained.
  • FIG. 1 is a diagram showing a first configuration example of an embodiment of a helical antenna of the present invention.
  • FIG. 2 is an expanded view of an antenna main body in the first helical antenna of the present invention.
  • FIG. 3 is a diagram showing a second configuration example of the embodiment of the helical antenna of the present invention.
  • FIG. 4 is a development view of the antenna main body in the second helical antenna of the present invention.
  • FIG. 5 is a diagram showing directivity in a vertical plane of the first helical antenna of the present invention.
  • FIG. 6 is a diagram showing a configuration example of a conventional helical antenna.
  • FIG. 7 is a development view of an antenna body in a conventional helical antenna. BEST MODE FOR CARRYING OUT THE INVENTION
  • FIG. 1 shows a first configuration of an embodiment of a helical antenna of the present invention.
  • FIG. 2 is a development view of the antenna main body in the helical antenna shown in FIG.
  • the helical antenna 1 is composed of a cylindrical antenna body 2 having an insulating outer diameter of 0 °, and helical elements 11, 1, 2, It comprises a phase delay circuit 3 for feeding power with a phase delay to 13 and 14, and a feeding unit 4.
  • the phase delay circuit 3 may include a matching circuit for matching the helical elements 11, 12, 13, 14 with the feed unit 4.
  • the antenna body 2 having the four helical elements 11 1 to 14 When the antenna body 2 having the four helical elements 11 1 to 14 is expanded, the antenna body 2 is as shown in FIG. 2, and the four helical elements 11 1 to 14 respectively have a winding angle line L ⁇ having a winding angle ⁇ . It can be seen that the antenna is bent into a triangular waveform, which is a periodic waveform, around the center line and wound around the antenna body 2.
  • the four helical elements 11 to 14 have the same shape. If the helical element 11 is used as an example, the winding angle of If the angle between the tangent of the helical element 11 at the intersection with the line L human helical element 11 and the normal of the winding angle La (center line) is] 3, then 0 ° ⁇ ] 3 ⁇ 90 . It has been. The angle of the top of the helical element 11 in the form of a triangular wave is 2 ⁇ .
  • the four helical elements 11 to 14 are formed by attaching a conductive thin film to the outer peripheral surface of the cylindrical antenna body 2 or formed on the entire outer peripheral surface of the antenna body 2. It is formed by etching a thin film.
  • the first helical antenna 1 of the present invention is formed by bending the four helical elements 11 to 14 into a triangular wave shape, the total length h1 of the helical antenna 1 is reduced to the conventional value. It can be shorter than a lithal antenna. It should be noted that the top of the triangular wave may be bent into a trapezoidal shape instead of being bent into a triangular wave.
  • the winding start ends of the four helical elements 11 to 14 are a , b, c, d, respectively, and the winding end ends are a ', b', c ', d', respectively.
  • the winding start ends a, b, c, and d are arranged at substantially equal intervals (approximately 90 °), and the winding start ends a, b, c, and d are provided with a predetermined phase amount from the phase delay circuit 3.
  • the delayed signal from feeder 4 is being supplied.
  • a signal delayed by approximately 0 ° at the beginning of winding a a signal delayed by approximately 270 ° at the beginning of winding b, and a signal delayed by approximately 180 ° at the beginning of winding c
  • the signal is supplied to the winding start end d with a delay of about 90 °.
  • the four helical elements 11 to 14 are approximately 90 counterclockwise.
  • a right-handed circularly polarized wave is radiated from the antenna body 2.
  • left-handed circularly polarized waves can be emitted from the antenna body 2.
  • the first helical antenna of the present invention can be a suitable antenna applied to portable equipment of a satellite mobile communication system.
  • FIG. 3 shows a second configuration of the embodiment of the helical antenna of the present invention.
  • FIG. 4 is a development view of the antenna main body in the helical antenna shown in FIG.
  • the helical antenna 31 has a cylindrical antenna body 32 having an insulating outer diameter of ⁇ o, and a helical element provided on the outer peripheral surface of the antenna body 32. It is composed of a phase delay circuit 33 that delays and feeds the phases to 41, 42, 43, and 44, and a feeder 34.
  • the phase delay circuit 33 may include a matching circuit that matches the helicopter elements 41, 42, 43, and 44 with the power supply section 34.
  • ⁇ to 4 are bent into a sinusoidal waveform having a periodic waveform with the winding angle line L having a winding angle ⁇ as the center line, and wound around the antenna body 32.
  • the four helical elements 41 to 44 have the same shape.
  • the winding angle of the winding angle Assuming that the angle between the tangent of the helical element 41 at the intersection with the element 41 and the normal of the winding angle line La (center line) is] 3,] 3 is 0 ° ⁇ ] 3 ⁇ 90 ° It has been.
  • the four helical elements 4:! To 4 4 are formed by attaching a conductive thin film to the outer peripheral surface of the cylindrical antenna main body 32, or are formed on the entire outer peripheral surface of the antenna main body 32. It is formed by etching the formed conductive thin film.
  • the four helical elements 41 to 44 are bent in a sine wave shape, the present invention is not limited to this.
  • the second helical antenna 31 of the present invention is bent in a curved shape to form four helical elements 4! As a result, the total length h2 of the helical antenna 31 can be made shorter than that of the conventional helical antenna.
  • the winding start ends of ⁇ 44 are a, b, c, d, respectively, and the winding end ends are a ', b', c ', d', respectively.
  • the winding start ends a, b, c, and d are arranged at substantially equal intervals (approximately 90 °), and the winding start ends a, b, c, and d have predetermined phases from the phase delay circuit 33.
  • the signal from the feeder 34 is delayed by a certain amount.
  • a A signal delayed by approximately 270 ° at the beginning of winding b, a signal delayed approximately 180 ° at the beginning of winding c, and a signal delayed approximately 90 ° at the beginning of winding d Is supplied.
  • the antenna body 32 emits right-handed circularly polarized waves.
  • left-handed circularly polarized waves can be radiated from the antenna body 32.
  • the second helical antenna of the present invention can also be a suitable antenna applied to portable equipment of a satellite mobile communication system.
  • FIG. 5 shows the directivity in the vertical plane of the first helical antenna 1 of the present invention shown in FIG.
  • this is the directivity in the vertical plane when the winding angle ⁇ of the helical antenna 1 is about 65 ° and] 3 is about 60 °.
  • the directivity shown in FIG. 5 it can be seen that the directivity of the conventional helical antenna 100 shown in FIG.
  • the above-described helical antenna of the present invention can be used not only for circularly polarized waves of right-handed and left-handed turns but also for linearly polarized waves.
  • the antenna main body 2 (32) is cylindrical, but the antenna main body 2 (32) is not limited to a cylindrical shape, and may be a polygonal shape such as a hexagon or an octagon.
  • the antenna body 2 (32) can be formed of an insulating material such as ABS resin (Acrylonitrile Butadiene Styrene Copolymer), polycarbonate, polyacetal, polypropylene, polytetrafluoroethylene, or a flexible base material such as polyimide. .
  • winding ends a, b ', c', d 'of the four helical elements 11-14 (4:!-44) are all open as shown in the figure. a, and the winding end c 'may be short-circuited, and the winding end b' and the winding end d 'may be short-circuited.
  • the number of helical elements is not limited to four, but may be one or two.
  • the helix antenna 1 (31) of the present invention is a portable antenna for a satellite mobile communication system.
  • the present invention can be applied not only to a mobile terminal antenna but also to a vehicle-mounted antenna and a ship antenna.
  • the present invention is configured such that each helical element of a plurality of helical elements is bent into a periodic wave shape having a winding angle line as a center line as a center line to form a helical antenna.
  • the overall length of the antenna body can be shortened.
  • the helical antenna can be reduced in size, and a helical antenna suitable for mounting on satellite communication equipment can be obtained.

Abstract

Selon cette invention, une pluralité d'éléments (11-14) en hélice sont formés autour de la surface périphérique externe d'un corps (2) principal d'antenne cylindrique, isolé, de façon à miniaturiser l'antenne et la transformer en antenne portable. Les éléments (11-14) en hélice enroulés de manière hélicoïdale au niveau d'angles prédéterminés sont courbés à la manière d'ondes périodiques dont le centre se présente sous forme de lignes angulaires d'enroulement Lα. Il est ainsi possible de réduire toute la longueur (h1) de l'antenne (1) en hélice.
PCT/JP2000/006410 1999-09-29 2000-09-20 Antenne en helice WO2001024315A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP00961109A EP1150382A1 (fr) 1999-09-29 2000-09-20 Antenne en helice

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP11/277490 1999-09-29
JP27749099A JP2001102852A (ja) 1999-09-29 1999-09-29 ヘリカルアンテナ

Publications (1)

Publication Number Publication Date
WO2001024315A1 true WO2001024315A1 (fr) 2001-04-05

Family

ID=17584334

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2000/006410 WO2001024315A1 (fr) 1999-09-29 2000-09-20 Antenne en helice

Country Status (3)

Country Link
EP (1) EP1150382A1 (fr)
JP (1) JP2001102852A (fr)
WO (1) WO2001024315A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7183998B2 (en) 2004-06-02 2007-02-27 Sciperio, Inc. Micro-helix antenna and methods for making same

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003008335A (ja) 2001-06-27 2003-01-10 Toshiba Corp アンテナ装置
GB0204014D0 (en) 2002-02-20 2002-04-03 Univ Surrey Improvements relating to multifilar helix antennas
JP4766260B2 (ja) * 2006-09-20 2011-09-07 ミツミ電機株式会社 アンテナ装置
FR2920917B1 (fr) 2007-09-11 2010-08-20 Centre Nat Etd Spatiales Antenne de type helice a brins rayonnants a motif sinusoidal et procede de fabrication associe.
FR2988524B1 (fr) * 2012-03-21 2014-03-28 Centre Nat Rech Scient Antenne helice compacte a profil sinusoidal modulant un motif fractal
CN112823447B (zh) * 2018-10-12 2022-04-05 华为技术有限公司 一种天线及无线设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5135099B1 (fr) * 1971-06-18 1976-09-30
EP0320404A1 (fr) * 1987-12-10 1989-06-14 Centre National D'etudes Spatiales Antenne de type hélice et son procédé de réalisation
US5198831A (en) * 1990-09-26 1993-03-30 501 Pronav International, Inc. Personal positioning satellite navigator with printed quadrifilar helical antenna
US5581268A (en) * 1995-08-03 1996-12-03 Globalstar L.P. Method and apparatus for increasing antenna efficiency for hand-held mobile satellite communications terminal
JPH09260915A (ja) * 1996-03-21 1997-10-03 Murata Mfg Co Ltd チップアンテナ

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5135099B1 (fr) * 1971-06-18 1976-09-30
EP0320404A1 (fr) * 1987-12-10 1989-06-14 Centre National D'etudes Spatiales Antenne de type hélice et son procédé de réalisation
US5198831A (en) * 1990-09-26 1993-03-30 501 Pronav International, Inc. Personal positioning satellite navigator with printed quadrifilar helical antenna
US5581268A (en) * 1995-08-03 1996-12-03 Globalstar L.P. Method and apparatus for increasing antenna efficiency for hand-held mobile satellite communications terminal
JPH09260915A (ja) * 1996-03-21 1997-10-03 Murata Mfg Co Ltd チップアンテナ

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7183998B2 (en) 2004-06-02 2007-02-27 Sciperio, Inc. Micro-helix antenna and methods for making same

Also Published As

Publication number Publication date
JP2001102852A (ja) 2001-04-13
EP1150382A1 (fr) 2001-10-31

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