WO2001031736A1 - Antenne helicoidale - Google Patents

Antenne helicoidale Download PDF

Info

Publication number
WO2001031736A1
WO2001031736A1 PCT/JP2000/007346 JP0007346W WO0131736A1 WO 2001031736 A1 WO2001031736 A1 WO 2001031736A1 JP 0007346 W JP0007346 W JP 0007346W WO 0131736 A1 WO0131736 A1 WO 0131736A1
Authority
WO
WIPO (PCT)
Prior art keywords
helical
winding pitch
wire
winding
helical element
Prior art date
Application number
PCT/JP2000/007346
Other languages
English (en)
Japanese (ja)
Inventor
Akio Kamiya
Masao Tomiyama
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 KR1020017008125A priority Critical patent/KR20010099951A/ko
Priority to EP00969962A priority patent/EP1143557A1/fr
Publication of WO2001031736A1 publication Critical patent/WO2001031736A1/fr

Links

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
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/08—Means for collapsing antennas or parts thereof
    • H01Q1/085—Flexible aerials; Whip aerials with a resilient base
    • 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
    • H01Q1/362—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith for broadside radiating helical antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/40—Radiating elements coated with or embedded in protective material

Definitions

  • the present invention relates to a lithal antenna.
  • Helical antennas have been conventionally used as portable antennas and mobile antennas because the physical length of the antenna can be made shorter than the effective antenna length.
  • Helical antennas used as portable antennas and mobile antennas are generally flexible because the antennas themselves may collide with obstacles.
  • a helical antenna having flexibility for example, as described in Japanese Patent No. 2880936, a helical element is covered with a shrinkable tube.
  • a helical element is previously molded integrally with a flexible resin, thereby forming the inside of an insulating resin vibrator.
  • a helical antenna is known in which an insert molding is performed and a center rod made of a flexible insulating resin is inserted therein.
  • a conventional helical antenna having flexibility since the helical coil is wound at a predetermined winding pitch, the helical element wound on the bent side when bent is used. The spacing between them becomes smaller, and on the other side the spacing between the helical elements becomes larger. In extreme cases, the helical elements come into contact with each other. Then, the electrical characteristics of the helical antenna change due to a change in the interval between the helical force elements, and the electrical length of the helical antenna changes when the helical elements come into contact with each other. That is, to the conventional flexible The helical antenna has a problem that the electrical characteristics of the helical antenna change when bent.
  • the winding pitch of the helical antenna is generally wound at a constant winding pitch, and it has been necessary to maintain a constant winding pitch during use to stabilize the electrical characteristics.
  • the conventional helical antenna has a problem in that during use, the winding pitch is likely to be irregular due to repeated bending and the like, and the electrical characteristics are likely to change.
  • the method of fixing the helical element by insert molding has a problem that the winding pitch fluctuates due to the molding pressure during insert molding.
  • an object of the present invention is to provide a helical antenna in which the winding pitch does not change even when used for a long period of time, and the electrical characteristics of which do not easily change even when bent. Disclosure of the invention
  • the helical antenna according to the present invention includes a spiral coil in which a wire whose core is covered with an insulating coating material is tightly wound in a spiral shape, and is inserted inside the spiral coil. And a flexible and insulating support member, and the winding pitch of the herical element is determined by the thickness of the covering material covering the element wire.
  • the winding pitch can be determined by the thickness of the covering material.
  • the winding pitch can be kept constant even when bent.
  • the winding pitch is determined by the thickness of the covering material, so that it is possible to prevent the winding pitch from changing.
  • a conductive element fitting to which a lower end of the support member is fitted and a lower end of the helical element where the core wire is exposed is connected.
  • the element fitting may be fixed to the antenna support.
  • the element may be configured as follows. A lower end of an element cover that covers the helical element inserted into the support member may be fitted to the metal fitting.
  • a cross-sectional shape of the wire in which a core wire is covered with an insulating covering material may be a flat shape.
  • the wires may be wires having a plurality of core wires arranged at substantially equal intervals. In this way, by tightly winding the elemental wire having two or three cores, a double-helical three-helical helical antenna can be easily obtained.
  • FIG. 1 is a half sectional view showing the entire configuration of the helical antenna of the present invention.
  • FIG. 2 (a) is an enlarged cross-sectional view showing the configuration of the lower part of the helical antenna of the present invention
  • FIG. 2 (b) is a bottom view thereof.
  • FIG. 3 is a diagram showing a configuration of a helical element in the helical antenna of the present invention.
  • FIG. 4 (a) is a half sectional view showing a configuration of an element fitting in the helical antenna of the present invention
  • FIG. 4 (b) is a bottom view of the element fitting.
  • FIG. 5 is a sectional view showing a configuration of an element cover in the helical antenna of the present invention.
  • FIG. 6 (a) is a diagram showing a configuration of a first wire constituting a helical element in the helical antenna of the present invention
  • FIG. 6 (b) is a diagram showing a configuration of a second wire
  • Fig. 6 (c) is a diagram showing the configuration of a third strand
  • Fig. 6 (d) is a diagram showing a helical engine using the third strand. It is a figure showing the example of composition of a element.
  • FIG. 7 (a) is a view showing a first step of an assembling step in the helical antenna of the present invention
  • FIG. 7 (b) is a view showing a second step
  • FIG. 7 (c) is a view showing FIG. 8 is a view showing a third step.
  • FIG. 8 (a) is a view showing a fourth step of the assembling step of the helical antenna of the present invention
  • FIG. 8 (b) is a view showing a fifth step
  • FIG. 8 (c) is a view showing the fifth step
  • FIG. 9 is a view showing a sixth step.
  • FIG. 1 is a half sectional view showing the entire configuration of the helical antenna of the present invention.
  • the helical antenna 1 of the present invention includes a helical element 10, a support member 11, an element cover 12, and an element fitting 13.
  • a support member 11 having a circular cross section made of an insulating resin rod is inserted in the helical element 10.
  • the helical element 10 is formed in a helical shape by tightly winding an element wire whose core wire is covered with an insulating material as described later, and the core material is removed at the lower end portion by removing the coating material. Is exposed.
  • the lower end of the support member 11 is fitted and fixed in the fitting hole formed in the metal element 13 and the core wire of the helicopter element 10 is exposed when fitted.
  • the lower end is electrically connected to the element fitting 13.
  • a screw portion for attaching the helical antenna 1 to the antenna support is formed at a lower portion of the element fitting 13.
  • Fig. 2 (a) shows an enlarged part of the lower part of the helical antenna 1.
  • the helical element 10 consists of a core wire consisting of a core wire 10a and a covering material 10b covering the core wire 10a in a helical coil. It is configured.
  • the lower end of the support member 11 inserted inside the helical element 10 is inserted and fitted from the upper surface of the element fitting 13.
  • the upper surface of the element bracket 13 is The eve-shaped extending portion 13c is formed so as to protrude, and a portion of the lower end portion of the helical element 10 where the core wire is exposed is inserted into the extending portion 13c.
  • a plurality of solder holes penetrating to the inside are formed on the peripheral side surface of the extending portion 13c, and solder 15 is soldered from the solder holes. As a result, the lower end of the helical element 10 is securely connected to the element fitting 13.
  • FIG. 2 (b) is a bottom view of the helical antenna. As shown in this figure, four protrusions are formed on the element fitting 13 and these four protrusions are used as elements. The four recesses formed in the lower inner peripheral surface of the cover 12 are engaged. As a result, the element cover 12 is prevented from rotating with respect to the element fitting 13.
  • the support member 11 is formed using a flexible resin material that can be returned even when bent, and the element cover 12 is also made of a flexible resin that can be returned when bent. Some, for example, are formed using polyurethane.
  • the helical antenna 1 of the present invention is formed as a helical element 10 in which a core wire 10a covered with an insulating coating material 10b is helically tightly wound as described above. Can be determined by the thickness of the coating material 10b. Therefore, even if the helical antenna 1 is bent, the winding pitch can be kept constant. In addition, even if the winding pitch is used for a long period of time while being repeatedly bent, the winding pitch is determined by the thickness of the coating material 10b, so that it is possible to prevent the winding pitch from changing.
  • the helical antenna 1 of the present invention can stabilize the electrical characteristics for a long time even if it has flexibility.
  • the configuration of each part constituting the helical antenna 1 of the present invention will be described.
  • FIG. 3 shows the helical element 10.
  • the helical element 10 is obtained by removing the helical element 10 c formed of a covered wire and the covering material 10 b. It is composed of an element fitting insertion portion 10d formed in a helical shape only with the core wire 10a.
  • the element section 10c has a length L1, and its diameter and length L1 are determined according to the frequency to be received.
  • the length of the element fitting insertion portion 10 d is L 2, which is a length corresponding to the extension 13 c of the element fitting 13.
  • the core wire 10a of the helical element 10 is a copper wire or a steel wire, and the core wire 10a is formed by molding and processing a resin coating material 10b such as polyamide on the core wire 10a. Is formed. By tightly winding this element wire with a predetermined diameter, a helical element 10 of a wound pitch having a thickness of the covering material 10b can be obtained.
  • FIG. 4 (a) and (b) the element fitting 13 is shown.
  • Fig. 4 (a) is a half sectional view of a plan view
  • Fig. 4 (b) is a bottom view.
  • a screw portion 13a for attaching the helical antenna 1 to an antenna attachment portion is formed at a lower portion of the metal element bracket 13 and a side surface of the central portion is formed.
  • a pipe-shaped extending portion 13c is formed so as to protrude from the upper surface.
  • a plurality of, for example, two solder holes 13d are formed on the peripheral side surface of the extending portion 13c.
  • FIG. 5 shows the element cover 12.
  • the element cover 1-2 is constituted by a cylindrical cover portion 12 a having a lower end face opened and an upper end face closed.
  • the space inside the element cover 12 has a size that allows the placement of the helical element 10 into which the support member 11 is inserted.
  • four concave portions 12 b are formed on the inner peripheral surface of the lower portion to prevent rotation, and four convex portions 13 formed on the element fitting 13 are formed in the concave portions 12 b. b are respectively fitted.
  • a ring-shaped protrusion 12 c is formed on the inner peripheral surface at the lower end of the element cover i 2, and the ring-shaped protrusion 12 c is formed by four recesses 1 of the element bracket 13.
  • Fig. 6 (a), (b) and (c) show the configuration of the strand 16 forming the helical element 10.
  • FIG. 6 (a) shows a configuration example of the first strand 16a, and the cross-sectional shape of the covering material 10b constituting the strand 16a is substantially circular.
  • the core wire 10a is located at the center of the coating material 10b.
  • the winding pitch when the helical element 10 is formed using the first strand 16a is substantially equal to the diameter of the covering material 10b.
  • Fig. 6 (b) shows an example of the configuration of the second strand 16b, and the strand 16b has two lines.
  • a helical element 10 wound in two turns can be obtained.
  • a helical element 10 is formed by forming a strand into three strips in which three core wires 10a are arranged at substantially equal intervals, a helical element 10 wound in three strips is obtained. Can be.
  • FIG. 6 (c) shows a configuration example of the third strand 16c, and the cross-sectional shape of the covering material 10b constituting the strand 16c is flat.
  • the core wire 10a is located at the center of the coating material 10b.
  • FIG. 6 (d) shows a cross section of a part of the configuration of the helical element 10 when the helical element 10 is configured using the third strand 16c.
  • the winding pitch P 1 of the relief element 10 is almost equal to the width of the strand 16 c. That is, since the winding pitch P1 can be determined according to the degree of flatness of the strand 16c, by changing the degree of flatness of the strand 16c, the helical pitch of various winding pitches P1 can be determined. Element 10 can be obtained.
  • the cross-sectional shape of the coating material 10b is not limited to a flat shape, but may be a rectangular shape having a horizontally long shape, an oval shape or the like.
  • the assembling process of the helical antenna 1 of the present invention will be described with reference to FIGS. 7 (a), (b), (c) and FIGS. 8 (a), (b), (c).
  • the helical element 10 is formed by being wound in a helical shape using the strand 16.
  • the recess 10 is passed through the insulating support member 11.
  • the extending portion 13c is subjected to hexagonal force crimping so that the extending portion 13c has a hexagonal cross section.
  • the element fitting insertion portion 10d of the helical element 10 inserted into the extension portion 13c is electrically and mechanically fixed to the extension portion 13c.
  • a helical element facing the inside of the solder hole 13d from the solder hole 13d formed in the extending portion 13c on which the hexagonal force is applied is formed.
  • the element fitting insertion portion 10d of the component 10 is soldered. This ensures that the element fitting 13 and the helical element 10 are electrically connected.
  • the element cover 12 is put on from the tip of the helical element 10 so as to cover the helical element 10 passed through the support member 11. Go.
  • the four concave portions 1 2b formed on the inner peripheral surface of the lower portion of the element cover 12 are engaged with the four convex portions 13b formed on the element fitting 13 and
  • the ring-shaped protrusions 12 c formed on the inner peripheral surface at the lower end come into engagement with the lower surfaces of the four protrusions 13 b formed on the element fitting 13.
  • a ring-shaped projecting portion 12c formed on the element cover 12 and a convex portion formed on the element fitting 13 are formed. Adhesive is applied to the portion that engages with 1 3b, and assembly of helical antenna 1 is completed.
  • the winding pitch can be determined by the thickness of the coating material. . Therefore, even if it bends, the winding pitch can be kept constant. Further, even if the winding pitch is used for a long period of time, the winding pitch is determined by the thickness of the covering material, so that the winding pitch can be prevented from changing.
  • the helical antenna of the present invention can stabilize the electrical characteristics for a long period of time even if it has flexibility.
  • various winding pitches can be formed according to the degree of flatness when tightly wound.

Landscapes

  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)

Abstract

Un élément de support constitué par une barre de résine souple est inséré dans un élément hélicoïdal. Cet élément hélicoïdal est constitué par un fil hélicoïdal à enroulement dense fait d'un conducteur recouvert d'un matériau isolant, et l'extrémité inférieure de ce conducteur est découverte à l'endroit où le matériau isolant a été retiré. Le fond de cet élément de support est ajusté fixe dans un trou ménagé dans une pièce de fixation en métal, laquelle est connectée électriquement à l'extrémité inférieure découverte du conducteur de l'élément hélicoïdal. L'extrémité inférieure de la pièce de fixation en métal est filetée pour permettre le montage d'une antenne hélicoïdale (1) sur une partie de support d'antenne. Le pas de l'enroulement de l'élément hélicoïdal est peu exposé aux variations dans le temps, et les caractéristiques électriques ne risquent guère de varier, lorsque l'antenne est courbée.
PCT/JP2000/007346 1999-10-25 2000-10-20 Antenne helicoidale WO2001031736A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020017008125A KR20010099951A (ko) 1999-10-25 2000-10-20 헬리컬 안테나
EP00969962A EP1143557A1 (fr) 1999-10-25 2000-10-20 Antenne helicoidale

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP30221599A JP2001127522A (ja) 1999-10-25 1999-10-25 ヘリカルアンテナ
JP11/302215 1999-10-25

Publications (1)

Publication Number Publication Date
WO2001031736A1 true WO2001031736A1 (fr) 2001-05-03

Family

ID=17906354

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2000/007346 WO2001031736A1 (fr) 1999-10-25 2000-10-20 Antenne helicoidale

Country Status (4)

Country Link
EP (1) EP1143557A1 (fr)
JP (1) JP2001127522A (fr)
KR (1) KR20010099951A (fr)
WO (1) WO2001031736A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120206315A1 (en) * 2011-02-15 2012-08-16 Harada Industry Co., Ltd Vehicle Pole Antenna
US8692725B2 (en) 2007-12-20 2014-04-08 Harada Industry Co., Ltd. Patch antenna device
US8941544B2 (en) 2008-07-08 2015-01-27 Harada Industry Co., Ltd. Vehicle roof mount antenna
US8994475B2 (en) 2008-05-27 2015-03-31 Harada Industry Co., Ltd. Vehicle-mounted noise filter
USD726696S1 (en) 2012-09-12 2015-04-14 Harada Industry Co., Ltd. Vehicle antenna
RU217948U1 (ru) * 2022-11-18 2023-04-25 Акционерное общество "Научно-производственное объединение Ангстрем" Малогабаритная антенна диапазона дмв1

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4141930B2 (ja) * 2003-09-29 2008-08-27 株式会社ヨコオ アンテナ構造
JP4862540B2 (ja) * 2006-08-01 2012-01-25 パナソニック株式会社 アンテナ装置
JP2008051560A (ja) * 2006-08-22 2008-03-06 Denso Corp レーダ装置
KR100838128B1 (ko) * 2007-02-14 2008-06-13 주식회사 알.에프.텍 휴대용 전자기기 안테나 모듈 및 이를 포함하는 휴대용전자기기
ITUD20120102A1 (it) * 2012-05-31 2013-12-01 Viteria Pettarini S R L Giunto per antenna di automobile
US10276940B2 (en) * 2013-10-31 2019-04-30 Motorola Solutions, Inc. Multi-band subscriber antenna for portable radios

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54103544A (en) * 1978-01-31 1979-08-15 Matsushita Electric Works Ltd Coil
WO1998033232A1 (fr) * 1997-01-28 1998-07-30 Yokowo Co., Ltd. Antenne a installer sur un vehicule, element d'antenne, et procede de fabrication
JPH11154820A (ja) * 1997-11-21 1999-06-08 Furukawa Electric Co Ltd:The 小型ヘリカルアンテナ
JPH11154819A (ja) * 1997-11-19 1999-06-08 Furukawa Electric Co Ltd:The 小型ヘリカルアンテナ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54103544A (en) * 1978-01-31 1979-08-15 Matsushita Electric Works Ltd Coil
WO1998033232A1 (fr) * 1997-01-28 1998-07-30 Yokowo Co., Ltd. Antenne a installer sur un vehicule, element d'antenne, et procede de fabrication
JPH11154819A (ja) * 1997-11-19 1999-06-08 Furukawa Electric Co Ltd:The 小型ヘリカルアンテナ
JPH11154820A (ja) * 1997-11-21 1999-06-08 Furukawa Electric Co Ltd:The 小型ヘリカルアンテナ

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8692725B2 (en) 2007-12-20 2014-04-08 Harada Industry Co., Ltd. Patch antenna device
US8994475B2 (en) 2008-05-27 2015-03-31 Harada Industry Co., Ltd. Vehicle-mounted noise filter
US8941544B2 (en) 2008-07-08 2015-01-27 Harada Industry Co., Ltd. Vehicle roof mount antenna
US20120206315A1 (en) * 2011-02-15 2012-08-16 Harada Industry Co., Ltd Vehicle Pole Antenna
US9153864B2 (en) * 2011-02-15 2015-10-06 Harada Industry Co., Ltd. Vehicle pole antenna
USD726696S1 (en) 2012-09-12 2015-04-14 Harada Industry Co., Ltd. Vehicle antenna
RU217948U1 (ru) * 2022-11-18 2023-04-25 Акционерное общество "Научно-производственное объединение Ангстрем" Малогабаритная антенна диапазона дмв1

Also Published As

Publication number Publication date
JP2001127522A (ja) 2001-05-11
EP1143557A1 (fr) 2001-10-10
KR20010099951A (ko) 2001-11-09

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