WO1997004496A1 - A combination of at least one helically wound coil and a carrier therefor for use in a helical antenna, and a method for the manufacture of such combination - Google Patents
A combination of at least one helically wound coil and a carrier therefor for use in a helical antenna, and a method for the manufacture of such combination Download PDFInfo
- Publication number
- WO1997004496A1 WO1997004496A1 PCT/SE1996/000867 SE9600867W WO9704496A1 WO 1997004496 A1 WO1997004496 A1 WO 1997004496A1 SE 9600867 W SE9600867 W SE 9600867W WO 9704496 A1 WO9704496 A1 WO 9704496A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coil
- carrier
- helical
- groove
- combination
- Prior art date
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
- H01Q1/362—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith for broadside radiating helical antennas
Definitions
- the present invention concerns helical antennas and more particularly the combination of at least one helically wound coil and a carrier therefor used in such antennas, as well as a method for manufacturing such a combination.
- carrier used herein is intended to mean a core located within a coil, a sleeve surrounding a coil, or, any other means for stabilizing and/or maintaining the original and intended dimensions of one or more wire coils.
- helical antennas i.e., antennas having a substantially helically wound wire coil, to wind the coil separately, to join the coil and a fitting adapted for connection of the antenna to a radio apparatus, to introduce a temporary core into the coil and to mould an outer casing around the temporary core and the coil, to remove the temporary core, and, finally, to mould an inner core within the coil.
- US-A-4 725 395 discloses a method of manufacturing an antenna including a pre-formed helically shaped wire coil.
- the coil is positioned and anchored within a mould.
- a dielectric material such as polypropylene, is injected into the mould to fill the interior of the coil.
- the core and coil unit is placed in a second mold and an outer cover is injection molded over the core and coil unit.
- This prior art method tends to deform the coil in the process, and the process includes too many steps to be really profitable.
- EP-A-0593185 describes a wideband antenna arrangement utilizing two antenna coils.
- the two coils are arranged concentrically, one within the other.
- the inner coil has a smaller diameter than the outer coil.
- the two coils are interwound and have substantially the same diameter. There is no disclosure of a core or other carrier stabilizing one or both coils.
- AU Patent 22,843 discloses the use of two or more helices, which may be on a common core and may have equal or different helix diameters.
- An outer helix may be wound over an inner helix, either directly or separated by layers of dielectric or ferrite material.
- the present invention is directed to a combination of at least one helically wound coil and a carrier therefor.
- the carrier is provided with at least one pre-formed helical groove having a pre-determined pitch.
- the coil is located in the groove and at least one end of the coil is extending beyond a corresponding end of the carrier, or, laterally thereof.
- An extending end of the coil enables length adjustment cutting as well as electrical connection of the coil such as to a printed circuit or to a fitting for connection of the antenna to a radio apparatus, such as a mobile telephone.
- the method includes the steps of forming a carrier with at least one helical groove having a pre-determined diameter and a pre ⁇ determined pitch, and introducing a helical coil having substantially the same diameter and pitch into the at least one groove by relatively rotating the carrier and the coil.
- the carrier in the case where the carrier is a core having an external groove, the coil is threaded onto the carrier. In the case where the carrier is a sleeve having an internal groove, the coil is threaded into the carrier.
- the carrier is a sleeve-shaped core having an external groove adapted to receive a first, outer coil, and an internal groove adapted to receive a second, internal coil. The carrier, together with the coil(s), are then to be part of the complete antenna, and will, therefore, be assembled in different ways together with the rest of the antenna components.
- This method according to the present invention results in hitherto unseen possibilities of automation of the production of helical antennas.
- a coil-forming machine in the production line for a helical antenna by at least partly forming, in the coil-forming machine, a wire to a helical coil having a pre-determined diameter and a pre-determined pitch, and a leading, free end, approaching the free end relative to a carrier having a helical pre-formed groove having a pre-determined diameter and a pre-determined pitch substantially corresponding to the diameter and the pitch of the coil, rotating ready-formed turns of the coil relative to the carrier, allowing the leading, free end to enter the pre-formed groove at a first end of the carrier, interrupting rotating the ready-formed turns after a pre-determined number of revolutions, and cutting the wire at the first end of the carrier.
- the rotating free end of the coil is allowed to enter the groove as soon as possible after it has been formed, thus providing support for the relatively flexible coil.
- Another advantage of the present invention is that the charac ⁇ teristics and the performance of the antenna, which depend on the geometry of the coil (e.g. wire length, coil and wire diameter, pitch) , can be optimized in the manufacturing process.
- One way of achieving this is to provide an automated production line for the antenna coils with a closed-loop function, wherein the antenna characteristics are continuously measured after the cutting of the wire and the results of the measurements are fed-back for adjusting, if necessary, parameters (preferably effective electrical length of wire, i.e., the correct coil wire length for receiving and transmitting radio waves) of the coil-forming stage in the automated production line. Feed-back measurements may be performed after a step of connecting the wire to a metallic fitting and may be used for affecting parameters (such as connecting point on wire) of such a production step.
- FIG. 1 is a perspective view showing a helical coil and a core therefor
- Fig. 2 is a perspective view showing a first step of a process for mechanized assembly of a coil and a core according to Fig. 1,
- Fig. 3 is a perspective view showing a subsequent step of a process for mechanized assembly of a coil and a core according to Fig. 1,
- Fig. 4 is a perspective view showing two equal helical coils and a core therefor
- Fig. 5 is a perspective view showing two different helical coils and a core therefor
- Fig. 6 is a perspective view showing a helical coil and a longitudinal section through a sleeve therefor,
- Fig. 7 is a perspective view showing two different helical coils and a partial longitudinal section through a sleeve therefor,
- Fig. 8 is a side-view showing a helical coil mounted on a core and having one end extending beyond an end of the coil,
- Fig. 9 is a side-view showing a helical coil mounted on a core and having one end extending laterally from an end of the coil,
- Fig. 10 is a side-view showing a helical coil mounted on a core and having one end connected to a metallic fitting
- Fig. 11 is a flow-chart illustrating the feed-back of signals from antenna performance measurements to the coil- forming machine.
- Fig. 1 a cylindrical, pre-formed core 11 having at its outer periphery a helical groove 12 having a pre-determined pitch and a pre-determined bottom or inner diameter.
- the helical groove has an entrance 12a at a first end of the core and an exit 12b at a second end thereof.
- a helically wound coil 13 having a pitch and an inner diameter substantially corresponding to the pitch and the groove bottom diameter, respectively, of the core 11.
- a first, or, leading end of the coil is denominated 13a and a second, or, trailing end thereof 13b.
- a combination of a helically wound coil and a core therefor is obtained by relatively rotating the core 11 and the coil 13 such that the leading end 13a of the coil enters the entrance 12a of the core so that the coil is threaded onto the core.
- FIGs. 2 and 3 are schematically shown two steps of an automatized process for mounting a helical coil on a core.
- a wire is formed to a coil 13 in a coil-forming machine 14 of the kind where ready-formed turns of the coil rotate as they leave the machine. Suck coil-forming machines are well known in the art.
- the rotational direction is indicated by an arrow A in Fig. 2.
- a core 11 is held by a core holder 15.
- the leading free end 13a of the coil is approached relative to the core as indicated by an arrow B.
- Such approach may be achieved by the axial growth of the coil as it gradually leaves the coil forming machine 14, or, the core holder may move the core towards the coil, or, there may be a combination of such movements.
- the rotating free end 13a of the coil is allowed to enter the entrance 12a of the groove 12 and to follow the groove as shown in Fig. 3 where the leading end 13a of the coil is shown to have rotated a bit more than two turns from the entrance.
- the rotation is interrupted and the wire is cut at the entrance 12a of the groove or at some distance therefrom to leave a portion of wire enough for electrically connecting the coil to a radio circuitry.
- end portion 13 ' may extend in the longitudinal direction beyond an end of the core as shown in Fig. 8.
- such end portion 13' ' may extend laterally from an end of the core as shown in Fig. 9.
- Electrical connection of the coil to a radio circuitry can be achieved as shown in Fig. 10 by fastening mechanically and contacting electrically the wire end 13b to a metallic fitting 110 to be attached to a radio circuit casing.
- Such fastening and contacting may be performed, e.g., by means of pressing (deforming), or, by connecting the wire end directly to a radio circuitry by means of soldering or by snap-in connection methods.
- Fig. 4 is shown a cylindrical, pre-formed core 21 having at its outer periphery a first helical groove 22 and a second helical groove 23, both being threaded in the same direction and both having substantially the same pre-determined pitch and the same pre-determined bottom or inner diameter.
- the helical grooves have entrances 22a, 23a, respectively, at a fir ⁇ t end of the core and exits 22b, 23b, respectively, at a second end thereof, the exit 23b being concealed in Fig. 4.
- the entrances as well as the exits are circumferentially displaced substantially 180°.
- a respective first, or, leading end of each coil is denominated 24a, 25a, respectively, and a respective second, or, trailing end thereof is denominated 24b, 25b, respectively.
- a combination of two helically wound coils and a common core therefor is obtained by relatively rotating the first coil 24 and the core 21 such that the leading end 24a of the coil enters the entrance 22a of the first helical groove 22 of the core so that the first coil is threaded onto the core, and by relatively rotating the second coil 25 and core 21 such that the leading end 25a of the coil enters the entrance 23a of the second helical groove 23 so that the second coil is threaded onto the core.
- Such threading of the coils onto the core takes place preferably one after the other, but may take place simultaneously.
- Fig. 5 is shown a cylindrical, pre-formed core 31 having at its outer periphery a first helical groove 32 threaded in a first direction, and a second helical groove 33 threaded in a second direction opposite to the first.
- the first groove 32 has a first pre-determined pitch and a first pre-determined bottom, or, inner diameter.
- the second groove 33 has a second pre-determined pitch, that is smaller than the first pitch, and a second pre-determined bottom, or, inner diameter, that is larger than the first diameter.
- the helical grooves have entrances 32a, 33a, respectively, at a first end of the core and exits 32b, 33b at a second end thereof. The entrances are circumferentially displaced substantially 180°.
- first helically wound coil 34 wound in said first direction and a second helically wound coil 35 wound in said second direction.
- the first coil 34 has a pitch and an inner diameter substantially corresponding to the pitch and the groove bottom diameter of the first groove 32.
- the second coil 35 has a pitch and an inner diameter substantially corresponding to the pitch and the groove bottom diameter of the second groove.
- a respective first, or, leading end of each coil is denominated 34a, 35a, respectively, and a respective second, or, trailing end thereof is denominated 34b, 35b, respectively.
- a combination of two helically wound coils and a common core therefor is obtained by relatively rotating the first coil 34 and the core 31 such that the leading end 34a of the coil enters the entrance 32a of the first helical groove 32 of the core so that the first coil is threaded onto the core, and by relatively rotating the second coil 35 and the core 31 such that the leading end 35a of the coil enters the entrance 33a of the second helical groove 33 so that the second coil is threaded onto the core.
- Such threading of the coils onto the core takes place preferably one after the other.
- Fig. 6 a pre-formed carrier in the shape of a sleeve
- the helical groove 42 has a pre-determined pitch and a pre-determined bottom, or, outer diameter.
- the helical groove has an entrance 42a at a first end of the sleeve and an exit 42b at a second end thereof.
- a helically wound coil 43 having a pitch and an inner diameter substantially corresponding to the pitch and the groove bottom diameter of the groove 42.
- a first, or, leading end of the coil is denominated 43a and a second, or, trailing end thereof is denominated 43b.
- a combination of a helically wound coil and a carrier therefor is obtained by relatively rotating the coil 43 and the sleeve 41 such that the leading end 43a of the coil enters the entrance 42a of the helical groove 42 of the sleeve so that the coil is threaded into the sleeve.
- a pre-formed carrier in the shape of a sleeve 51 having at its outer periphery a first helical groove 52 and at its inner periphery a second helical groove 53, both being threaded in the same direction.
- the first groove 52 has a first pre-determined pitch and a first pre-determined bottom, or, inner diameter.
- the second groove 53 has a second pre-determined pitch and a second pre-determined bottom, or, outer diameter.
- the helical grooves have entrances 52a, 53a, respectively, at a first end of the sleeve and exits 52b, 53b at a second end thereof.
- the entrances are preferably but not necessarily circumferentially displaced substantially 180°.
- first helically wound coil 54 and a second helically wound coil 55 There is also shown a first helically wound coil 54 and a second helically wound coil 55.
- the first coil 54 has a pitch and an inner diameter substantially corresponding to the pitch and the groove bottom diameter of the first groove 52.
- the second coil 55 has a pitch and an outer diameter substantially corresponding to the pitch and the groove bottom diameter of the second groove 53.
- a respective first, or, leading end of each coil is denominated 54a, 55a, respectively, and a respective second, or, trailing end thereof is denominated 54b, 55b, respectively.
- a combination of two helically wound coils and a common carrier therefor is obtained by relatively rotating the first coil 54 and the sleeve 51 such that the leading end 54a of the coil enters the entrance 52a of the first helical groove 52 of the core so that the first coil is threaded onto the core, and by relatively rotating the second coil 55 and the sleeve 51 such that the leading end 55a of the coil enters the entrance 53a of the second helical groove 53 so that the second coil is threaded into the sleeve.
- Such threading of the coils onto and into the sleeve preferably takes place one after the other, but may take place simultaneously.
- Figs. 7 may be threaded in opposite directions. It will also be understood that the embodiments of the present invention described with reference to Figs. 4 - 7 may be mechanically manufactured by means of equipment similar to that shown in Fig. 2 and 3 and including one coil forming machine (embodiments according to Figs. 4 and 6) or two coil forming machines (embodiments according to Figs. 5 and 7).
- the core could be rotatable with respect to the coil or a combination of both core and coil may be simultaneously rotatable.
- Fig. 11 schematically illustrates how parameters in the coil- forming process, particularly the length of the wire forming the coil, can be continuously adjusted.
- a wire enters a coil-forming machine.
- a coil leaves the machine and enters a measuring station where the antenna performance of the coil is measured.
- the result of the measurement is fed back to the coil-forming machine as an adjusting signal for adjusting, e.g., the length of the wire, i.e., the position where to cut the wire.
- Approved coils are fed out at the right of the figure, whereas non-approved coils are disposed of (not shown) .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU64731/96A AU6473196A (en) | 1995-07-14 | 1996-06-28 | A combination of at least one helically wound coil and a carrier therefor for use in a helical antenna, and a method for the manufacture of such combination |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9502610-0 | 1995-07-14 | ||
SE9502610A SE9502610D0 (sv) | 1995-07-14 | 1995-07-14 | A combination of at least one helically wound coil and carrier therefor for use in a helical antenna, and a method for the manufacture of such combination |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997004496A1 true WO1997004496A1 (en) | 1997-02-06 |
Family
ID=20399000
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE1996/000867 WO1997004496A1 (en) | 1995-07-14 | 1996-06-28 | A combination of at least one helically wound coil and a carrier therefor for use in a helical antenna, and a method for the manufacture of such combination |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU6473196A (sv) |
SE (1) | SE9502610D0 (sv) |
WO (1) | WO1997004496A1 (sv) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2344938A (en) * | 1998-12-18 | 2000-06-21 | Nokia Mobile Phones Ltd | A multiple band, multiple co-axial element antenna |
US6452569B1 (en) | 2001-03-29 | 2002-09-17 | Samsung Electro-Mechanics Co., Ltd. | Antenna, and manufacturing method therefor |
WO2017028955A1 (de) * | 2015-08-20 | 2017-02-23 | Diehl Metering Gmbh | Antenneneinrichtung zum empfangen und/oder übertragen von funksignalen |
WO2019232324A1 (en) * | 2018-05-31 | 2019-12-05 | Vgxi Inc. | Lysis coil apparatus and uses thereof for isolation and purification of polynucleotides |
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US4725395A (en) * | 1985-01-07 | 1988-02-16 | Motorola, Inc. | Antenna and method of manufacturing an antenna |
WO1991015621A1 (en) * | 1990-04-03 | 1991-10-17 | The Bentley-Harris Manufacturing Company | Antenna structure and method of making same |
EP0593185A1 (en) * | 1992-10-14 | 1994-04-20 | Nokia Mobile Phones Ltd. | Wideband antenna arrangement |
US5406693A (en) * | 1992-07-06 | 1995-04-18 | Harada Kogyo Kabushiki Kaisha | Method of manufacturing a helical antenna for satellite communication |
EP0657956A1 (en) * | 1993-12-06 | 1995-06-14 | Alcatel N.V. | Antenna assembly |
EP0658907A1 (en) * | 1993-12-14 | 1995-06-21 | Antenna Products Limited | Methods of manufacture of electrical components |
-
1995
- 1995-07-14 SE SE9502610A patent/SE9502610D0/sv unknown
-
1996
- 1996-06-28 WO PCT/SE1996/000867 patent/WO1997004496A1/en active Application Filing
- 1996-06-28 AU AU64731/96A patent/AU6473196A/en not_active Abandoned
Patent Citations (6)
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US4725395A (en) * | 1985-01-07 | 1988-02-16 | Motorola, Inc. | Antenna and method of manufacturing an antenna |
WO1991015621A1 (en) * | 1990-04-03 | 1991-10-17 | The Bentley-Harris Manufacturing Company | Antenna structure and method of making same |
US5406693A (en) * | 1992-07-06 | 1995-04-18 | Harada Kogyo Kabushiki Kaisha | Method of manufacturing a helical antenna for satellite communication |
EP0593185A1 (en) * | 1992-10-14 | 1994-04-20 | Nokia Mobile Phones Ltd. | Wideband antenna arrangement |
EP0657956A1 (en) * | 1993-12-06 | 1995-06-14 | Alcatel N.V. | Antenna assembly |
EP0658907A1 (en) * | 1993-12-14 | 1995-06-21 | Antenna Products Limited | Methods of manufacture of electrical components |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2344938A (en) * | 1998-12-18 | 2000-06-21 | Nokia Mobile Phones Ltd | A multiple band, multiple co-axial element antenna |
US6300913B1 (en) | 1998-12-18 | 2001-10-09 | Nokia Mobile Phones Ltd. | Antenna |
US6452569B1 (en) | 2001-03-29 | 2002-09-17 | Samsung Electro-Mechanics Co., Ltd. | Antenna, and manufacturing method therefor |
GB2374465A (en) * | 2001-03-29 | 2002-10-16 | Samsung Electro Mech | Dual helix antenna and manufacturing methods |
GB2374465B (en) * | 2001-03-29 | 2005-04-20 | Samsung Electro Mech | Antenna and manufacturing method therefor |
AT501583A1 (de) * | 2001-03-29 | 2006-09-15 | Samsung Electro Mech | Antenne und verfahren zu ihrer herstellung |
AT501583B1 (de) * | 2001-03-29 | 2007-05-15 | Samsung Electro Mech | Dualband-antenne und verfahren zu ihrer herstellung |
WO2017028955A1 (de) * | 2015-08-20 | 2017-02-23 | Diehl Metering Gmbh | Antenneneinrichtung zum empfangen und/oder übertragen von funksignalen |
WO2019232324A1 (en) * | 2018-05-31 | 2019-12-05 | Vgxi Inc. | Lysis coil apparatus and uses thereof for isolation and purification of polynucleotides |
KR20210015973A (ko) * | 2018-05-31 | 2021-02-10 | 브이지엑스아이 인코포레이티드 | 폴리뉴클레오타이드의 분리 및 정제를 위한 용해 코일 장치 및 그것의 용도 |
CN112424337A (zh) * | 2018-05-31 | 2021-02-26 | 维格希公司 | 用于分离和纯化多核苷酸的溶胞线圈设备及其用途 |
US20210207075A1 (en) * | 2018-05-31 | 2021-07-08 | Vgxi Inc. | Lysis coil apparatus and uses thereof for isolation and purification of polynucleotides |
JP2021525521A (ja) * | 2018-05-31 | 2021-09-27 | ブイジーエックスアイ,インコーポレイティド | ポリヌクレオチドを単離及び精製するための溶解コイル装置及びその使用 |
EP3802781A4 (en) * | 2018-05-31 | 2022-03-30 | VGXI, Inc. | LYTIC COIL AND ITS USES FOR THE ISOLATION AND PURIFICATION OF POLYNUCLEOTIDS |
KR102650233B1 (ko) * | 2018-05-31 | 2024-03-21 | 브이지엑스아이 인코포레이티드 | 폴리뉴클레오타이드의 분리 및 정제를 위한 용해 코일 장치 및 그것의 용도 |
Also Published As
Publication number | Publication date |
---|---|
AU6473196A (en) | 1997-02-18 |
SE9502610D0 (sv) | 1995-07-14 |
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