EP1192684A1 - Antenne demontable, a charge capacitive, de type fouet et procede de fabrication d'un segment rayonnant d'une telle antenne - Google Patents
Antenne demontable, a charge capacitive, de type fouet et procede de fabrication d'un segment rayonnant d'une telle antenneInfo
- Publication number
- EP1192684A1 EP1192684A1 EP00909446A EP00909446A EP1192684A1 EP 1192684 A1 EP1192684 A1 EP 1192684A1 EP 00909446 A EP00909446 A EP 00909446A EP 00909446 A EP00909446 A EP 00909446A EP 1192684 A1 EP1192684 A1 EP 1192684A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- antenna
- capacitive load
- load
- segment
- mandrel
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
- H01Q9/32—Vertical arrangement of element
-
- 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
- H01Q1/08—Means for collapsing antennas or parts thereof
- H01Q1/088—Quick-releasable antenna elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
- H01Q5/321—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors within a radiating element or between connected radiating elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
Definitions
- the invention relates to a detachable antenna with capacitive load, of the whip type, whip antenna in Anglo-Saxon language; such an antenna, whether it can be dismantled or not, has a wide operating frequency band. It is known to further widen this band by associating with the antenna a tuning box, Antenna Tuning Unit in Anglo-Saxon language; the purpose of this tuning box is to perfect the impedance matching throughout the useful band.
- the object of the present invention is to avoid or, at the very least, to reduce these drawbacks.
- a removable antenna with a capacitive load, of the whip type, comprising radiating segments distinct from one another and arranged one after the other, each segment comprising a conductive strand which extends over all the length of the segment, characterized in that at least one of the segments comprises a capacitive load, entirely inserted in its conductive strand, and a hollow insulating tube which serves as a support for the conductive strand and inside which is housed the capacitive load, in that the capacitive load comprises a first reinforcement constituted by a metal enclosure, a second reinforcement constituted by a section of a conductive wire covered with an insulating sheath, this section of wire being located in the enclosure and terminating , at least at one of its ends, at the edge of the enclosure and in that the conductive wire extends the section outside the enclosure to provide access to the second frame.
- a method of manufacturing a radiating segment of a removable antenna, with capacitive load, of the whip type characterized in that this segment comprising a conductive strand with, in series, a ferrule, a tubular metal braid, a metal block, a conductive wire, it consists in using a mandrel, threading the ferrule and the braid on the mandrel, bringing the block to bear on the mandrel, coating the conductive strand with glass fibers pre-impregnated with a thermosetting resin and then, after hardening, removing the mandrel.
- FIG. 3 a removable whip antenna
- FIGS. 4a, 4b, 4c are section views of whip antenna elements according to the invention.
- FIG. 5a a spare part used in the antennas according to FIGS. 4a, 4b and 4c,
- FIG. 5b two separate parts, including that according to FIG. 5a, as they are associated in the antennas according to FIGS. 4a, 4b, 4c,
- broadband antenna should be understood, in what follows, an antenna whose operating band covers more than one octave.
- a whip-type antenna for example for a vehicle and in the band 30 - 88 MHz, it is usual to adopt as radiating structure a filiform monopole comprising at least one capacitive load, and to associate this monopoly with a tuning box designed to perfect the impedance adaptation throughout the useful band; the tuning box can be compared to a bandpass filter.
- FIG. 1 is a diagram of a broadband whip antenna, 1.
- This antenna comprises a vertical monopole constituted by the placing in series of a first conductive strand 2a, of a capacitive load 3 and of a second conductive strand 2b.
- the antenna 1 also comprises a tuning box, 5, arranged between the antenna access and the lower end of the conductor strand, 2a, from the bottom of the monopole.
- the antenna 1 is mounted on a ground plane 4, also called a counterweight, which is constituted for example by the metal roof of a vehicle.
- Figure 1b is another diagram of a broadband whip antenna, 1.
- This antenna with its vertical monopole and its tuning box, 5, is mounted on a ground plane, 4; it differs from the antenna according to FIG. 1 b by the constitution of its monopole which comprises, in series from the tuning box 5: a first conductive strand 2a, a first capacitive load 3a, a second conductive strand 2b , a second capacitive load 3b, a third conductive strand 2c, a third capacitive load 3c and a fourth conductive strand 2d.
- FIGS. 2a, 2b, 2c Different ways of carrying out these capacitive loads in whip antennas are known, they are illustrated by FIGS. 2a, 2b, 2c where two conductive strands 2a, 2b arranged in the extension of one another, are coupled by a capacitive load which is arranged at the place where the two strands can be detached from one another and which is only formed when the two strands in question are assembled end to end.
- the capacitive load requires a dielectric 30 and a metallic sleeve 3d: the dielectric isolates the conductive strands 2a, 2b, the ends of which it covers, while the 3d sleeve surrounds the dielectric.
- the capacitive coupling between the strands 2a, 2b takes place in part directly through the dielectric and partly successively via the dielectric, the metal sleeve and again the dielectric.
- the conductive strand 2a is hollow and a hollow dielectric cylinder, 30, is inserted in the strand 2a, at the upper end of the latter.
- the conductive strand 2b has its section at its lower end which corresponds to the internal section of the hollow cylinder; it can thus be threaded into this cylinder so that a capacitive charge is produced between the ends of the two strands 2a, 2b separated by the dielectric of the cylinder 30.
- the strand 2b is shown before being inserted into the hollow cylinder 30.
- the capacitive load is obtained by coupling between two conducting wires 3e, 3f wound on an insulating cylinder 30; the cylinder 30 has its two ends which are secured respectively to the strands 2a and 2b; the wires 3e, 3f are welded respectively, at one of their ends, to the strands 2a, 2b and have their other free end, moreover the wires 3e, 3f are isolated from one another.
- whips with capacitive loads of the kind of loads according to FIGS. 2a, 2b or 2c have several drawbacks. Indeed, the insulating element 30 must ensure, in these loads, a double role: radioelectric role by contributing directly, as a dielectric, to the value of the capacitive load and mechanical role by contributing to the mechanical strength of the whip. However, for whips 2.5 to 3 meters high, the mechanical stresses can be very severe, which requires mechanical reinforcements in terms of capacitive loads and increases the cost price of the antenna.
- FIG. 3 An overview of a removable whip antenna is shown in Figure 3 with a whip and a tuning box 5 installed schematically on a ground plane 4 which can be the metal body of a vehicle.
- the whip is removable in two radiating segments distinct from each other Sa, Sb; disassembly is done by a ferrule with male thread 2n, located at the upper end of the lower segment Sa and by a ferrule with female thread 2g corresponding, located at the lower end of the Sb segment.
- the Sa segment has a female ferrule at its lower end.
- the electrical connection between the whip and the tuning box takes place through a connecting piece with a male thread 2m and a damping spring 2r; in Figure 3 the part 2m and the spring 2r are shown before the part 2m has been made integral with the spring 2r by interlocking in force; the 2m part and the damping spring are usually an integral part of the tuning box.
- the antenna which served as an example for FIG. 3 is an antenna according to the invention with an entire capacitive load disposed in the segment Sa and not, as in the examples according to FIGS. 2a, 2b, 2c, with a capacitive load disposed at the point where the strands 2a and 2b can be detached from each other.
- FIGS. 4a, 4b, 4c are three views in longitudinal section of the segment Sa of FIG. 3 corresponding respectively to three different positioning heights of the capacitive load inside the radiating segment Sa.
- the proportions have not been respected for reasons of understanding the drawing; this is for example that the conductive strands according to FIGS. 4 are 1.30 meters long, including 1 meter long for their conical part, and are only 15 mm in their greatest width and that the 2n ferrules have a total length of 9 cm with a threaded part on only 2 cm of this length.
- the segments according to FIGS. 4a, 4b, 4c comprise a support consisting of a long hollow, insulating tube 20, terminated by two metallic ferrules 2f, 2n and the conductive strand consists of the two ferrules and an electrical connection with capacitive load, 3, between the two ferrules.
- the hollow, insulating tube 20 which ensures the mechanical strength of the segment; it is made of plastic reinforced with glass fiber and the load 3 is housed inside this hollow tube.
- FIGS. 5a, 5b show how the capacitive load 3 is produced in the examples which are represented in FIGS. 4.
- This charge comprises a metal block 33 shown alone and as if it were transparent, in FIG. 5a; this block consists of a straight cylinder, with a large cylindrical hole, 3k, which opens into one of the bases of the right cylinder and two small cylindrical holes, 3g, 3h, which open into the other of the bases of the right cylinder; the three holes are parallel to the long axis, not shown, of the right cylinder and the small holes open into the large hole, substantially equidistant from the two bases of the right cylinder.
- an electric cable 31 composed of a conductive wire 32 and an insulating sheath 30, enters the hole 3g, folds back, C, inside the hole 3k and comes out of the block while crossing the hole 3h.
- the block 33 has been drawn as if it were transparent; moreover a tear in the wall of the block allows to better see the cable 31 at its fold. Thread
- the block 33 is made of brass, it has a length of 1 cm and a diameter of 5 mm; the two holes 3g, 3h have a diameter of 1.5mm and a length of 6mm.
- the block 33 constitutes one of the reinforcements while the wire 32, in its part located inside the block, constitutes the other reinforcement.
- the 3k hole has a double role: - it stabilizes the value of the load capacity by canceling the edge effect generated by the fallback loop - it facilitates the positioning of block 33 in the radiating segment, as will appear during the description of Figures 6b, 6c, 6d.
- the block 33 may not have a hole 3k, the holes 3g, 3h extending over the entire length of the block 33 and the withdrawal taking place outside the block.
- the large hole 3k can be closed by a plug or a metal cover; this results in a small gain in stabilizing the value of the load capacity and a slight increase in the cost of the load.
- the metal block 33 can take forms other than that of a straight cylinder, it being understood that it must constitute a metal enclosure into which the insulated part penetrates. an electric cable; it is even possible that the cable has one of its ends located in the metal enclosure and / or that the cable is sheathed over practically its entire length.
- the capacitive load 3 housed in the hollow insulating tube 20 is located in the vicinity of the ferrule 2n; it is connected to the ferrule 2f by a tubular metallic braid 21 which is pressed against the internal wall of the hollow tube.
- the conductive strand goes from the ferrule 2f to the ferrule 2n, passing successively through the metallic braid 21, through the capacitive load 3 and through the stripped and twisted part of the output wire of the load 3.
- the capacitive load 3 is substantially housed midway between the ends of the radiating segment and the electrical connection between the two ferrules comprises the same succession of elements as in the embodiment according to FIG. 4a; on the other hand, the length of the metal braid 21 is half shorter than in the example according to FIG. 4a and the length of the stripped and twisted part of the load 3 output wire goes from about ten centimeters to about fifty centimeters .
- the capacitive load 3 is in direct contact with the ferrule 2f in which it is embedded.
- the electrical connection between the two ferrules 2f, 2n is therefore reduced to two elements: the load 3 and the stripped and twisted part of the load output wire.
- Figures 6 are diagrams which illustrate a way of making the conductive strand according to Figure 4a.
- FIG. 6a represents a mandrel constituted by a length of rod 6, with symmetry of revolution about an axis, with on one side a shoulder which forms a stop 61 and on the other side a tenon 62.
- This mandrel has a part frustoconical, the smallest base of which is attached to the tenon 62 and the total length of which is one meter; this length of the frustoconical part, compared with the total length of the mandrel which is 1, 3 m, shows that the proportions have not been respected with the aim, as indicated above, of making the drawing easier to understand.
- a ferrule 2f is threaded onto the mandrel 6 and comes into contact with the fogging 61.
- a capacitive load 3 of the kind of the load according to FIG. 5b is fitted onto the tenon of the mandrel; the block 33 of the load plays, with its large hole, the role of mortise in this interlocking. Then a section of tubular braid made of tinned copper wires, 21, is fitted onto the mandrel and welded at its two ends, respectively to the ferrule 2f and to the block 33 of the load 3; it is this braid 21 which requires the presence of the mandrel to avoid being deformed during the coating operation which will be discussed below.
- the mandrel equipped according to FIG. 6b is ready to receive a protective envelope made of plastic reinforced with glass fibers, to form the insulating hollow tube 20 which was discussed during the description of FIG. 4a. It is a lateral coating which goes from the load outlet wire 3 to the level of the stop 61 of the mandrel.
- various techniques can be used, for example the techniques which use, as coating material, glass fibers or glass fiber fabric, these coating materials being beforehand impregnated with a thermosetting resin; among the known techniques it should be noted: - winding of glass fibers, - the rolling operation with a glass fiber fabric, - the technique of continuously depositing glass fibers with a machine sold commercially under the trademark SPIRGLASS.
- the assembly thus covered with its tube 20 is shown in Figure 6c.
- FIG. 6d represents, seen in longitudinal section, this finished segment.
- the tube 20 has been drawn slightly detached from the ferrules, the capacitive load, the load output wire and the braid when it exists; this representation was intended to better distinguish the elements constituting the conductive strand but, of course, in reality the tube 20 is perfectly plated on the elements that it envelops.
- Figures 6 deal with the method of manufacturing a radiating segment according to Figure 4a. These figures can be adapted to the manufacture of a segment according to FIGS. 4b and 4c respectively by using a shorter mandrel and by not using a mandrel; indeed the role of the mandrel is to support the metal braid when it exists, during the deposition of glass fiber reinforced plastic.
- the present invention is not limited to the examples described or mentioned above, it is thus in particular that various assembly means can be used to replace the screw ferrules for the assembly of the radiating segments to each other. end of the others: smooth tubes fitting into each other, bayonet systems, snap-fitting assembly, etc., or even the ferrules can, for example, be replaced by plates and the connection between two successive segments can be carried out by joining the plates at the junction and fixing them to each other by means of the screw-nut type.
- the present invention is particularly intended for antennas for mobile stations, whether these stations are mounted on a vehicle or are of the portable type.
Landscapes
- Details Of Aerials (AREA)
- Waveguide Aerials (AREA)
- Support Of Aerials (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9903092A FR2790872B1 (fr) | 1999-03-12 | 1999-03-12 | Antenne demontable, a charge capacitive, de type fouet et procede de fabrication d'un segment rayonnant d'une telle antenne |
FR9903092 | 1999-03-12 | ||
PCT/FR2000/000565 WO2000055940A1 (fr) | 1999-03-12 | 2000-03-07 | Antenne demontable, a charge capacitive, de type fouet et procede de fabrication d'un segment rayonnant d'une telle antenne |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1192684A1 true EP1192684A1 (fr) | 2002-04-03 |
EP1192684B1 EP1192684B1 (fr) | 2004-08-04 |
Family
ID=9543130
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00909446A Expired - Lifetime EP1192684B1 (fr) | 1999-03-12 | 2000-03-07 | Antenne demontable, a charge capacitive, de type fouet et procede de fabrication d'un segment rayonnant d'une telle antenne |
Country Status (10)
Country | Link |
---|---|
US (1) | US6404396B1 (fr) |
EP (1) | EP1192684B1 (fr) |
JP (1) | JP2002539703A (fr) |
AT (1) | ATE272901T1 (fr) |
AU (1) | AU3172900A (fr) |
CA (1) | CA2367141A1 (fr) |
DE (1) | DE60012743T2 (fr) |
FR (1) | FR2790872B1 (fr) |
IL (1) | IL145251A0 (fr) |
WO (1) | WO2000055940A1 (fr) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2829622B1 (fr) * | 2001-09-11 | 2004-04-09 | Thales Sa | Systeme antennaire a rendement elevee et a forte puissance |
FR2837988B1 (fr) * | 2002-03-26 | 2008-06-20 | Thales Sa | Systeme antennaire bi-bande vhf-uhf |
AUPS219102A0 (en) * | 2002-05-08 | 2002-06-06 | Jobse, Jasper Aart | Improvments to hf helical whip antenna |
US7132995B2 (en) * | 2003-12-18 | 2006-11-07 | Kathrein-Werke Kg | Antenna having at least one dipole or an antenna element arrangement similar to a dipole |
US7027004B2 (en) * | 2003-12-18 | 2006-04-11 | Kathrein-Werke Kg | Omnidirectional broadband antenna |
EP1750327A3 (fr) * | 2005-08-01 | 2007-03-14 | Hirschmann Car Communication GmbH | Antenne tige, en particuliere une antenne de radiotelephonie mobile pour des véhicule |
US7436368B1 (en) * | 2005-09-16 | 2008-10-14 | Rockwell Collins, Inc. | Antenna adapter for improved cosite performance |
US20110001685A1 (en) * | 2008-03-11 | 2011-01-06 | Mitsubishi Cable Industries, Ltd. | Antenna device and method for producing the same |
CN102004173B (zh) * | 2009-09-01 | 2014-02-19 | 鸿富锦精密工业(深圳)有限公司 | 探针 |
AU2012210173A1 (en) | 2011-01-27 | 2013-08-29 | Galtronics Corporation Ltd. | Broadband dual-polarized antenna |
US8692722B2 (en) | 2011-02-01 | 2014-04-08 | Phoenix Contact Development and Manufacturing, Inc. | Wireless field device or wireless field device adapter with removable antenna module |
US8681059B2 (en) * | 2011-06-22 | 2014-03-25 | Motorola Solutions, Inc. | Antenna configuration |
EP3091610B1 (fr) * | 2015-05-08 | 2021-06-23 | TE Connectivity Germany GmbH | Système d'antenne et module d'antenne à réduction d'interférences entre des motifs rayonnants |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3950757A (en) * | 1975-03-12 | 1976-04-13 | Beam Systems Israel Ltd. | Broadband whip antennas |
GB1547136A (en) * | 1978-02-07 | 1979-06-06 | Marconi Co Ltd | Radio antennae |
US4229743A (en) * | 1978-09-22 | 1980-10-21 | Shakespeare Company | Multiple band, multiple resonant frequency antenna |
US4435713A (en) * | 1981-11-20 | 1984-03-06 | Motorola, Inc. | Whip antenna construction |
US4513338A (en) * | 1984-02-01 | 1985-04-23 | The United States Of America As Represented By The Secretary Of The Army | Whip antenna high voltage protection device |
US4890116A (en) * | 1986-04-09 | 1989-12-26 | Shakespeare Company | Low profile, broad band monopole antenna |
US4958164A (en) * | 1986-04-09 | 1990-09-18 | Shakespeare Company | Low profile, broad band monopole antenna |
US5836072A (en) * | 1995-07-27 | 1998-11-17 | Sullivan; Jonathan Lee | Method of assembling an antenna and over-molding the same with a thermoplastic material |
FR2758012B1 (fr) | 1996-12-27 | 1999-05-28 | Thomson Csf | Antenne double, en particulier pour vehicule |
FR2759498B1 (fr) * | 1997-02-07 | 1999-08-27 | Thomson Csf | Antenne a geometrie variable |
AU7251398A (en) * | 1997-04-24 | 1998-11-13 | Whitaker Corporation, The | Multiple band whip antenna |
-
1999
- 1999-03-12 FR FR9903092A patent/FR2790872B1/fr not_active Expired - Fee Related
-
2000
- 2000-03-07 IL IL14525100A patent/IL145251A0/xx unknown
- 2000-03-07 AT AT00909446T patent/ATE272901T1/de not_active IP Right Cessation
- 2000-03-07 WO PCT/FR2000/000565 patent/WO2000055940A1/fr active IP Right Grant
- 2000-03-07 AU AU31729/00A patent/AU3172900A/en not_active Abandoned
- 2000-03-07 EP EP00909446A patent/EP1192684B1/fr not_active Expired - Lifetime
- 2000-03-07 CA CA002367141A patent/CA2367141A1/fr not_active Abandoned
- 2000-03-07 JP JP2000605284A patent/JP2002539703A/ja not_active Withdrawn
- 2000-03-07 DE DE60012743T patent/DE60012743T2/de not_active Expired - Lifetime
-
2001
- 2001-09-10 US US09/936,180 patent/US6404396B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0055940A1 * |
Also Published As
Publication number | Publication date |
---|---|
IL145251A0 (en) | 2002-06-30 |
CA2367141A1 (fr) | 2000-09-21 |
ATE272901T1 (de) | 2004-08-15 |
DE60012743T2 (de) | 2005-09-01 |
EP1192684B1 (fr) | 2004-08-04 |
FR2790872A1 (fr) | 2000-09-15 |
US6404396B1 (en) | 2002-06-11 |
DE60012743D1 (de) | 2004-09-09 |
AU3172900A (en) | 2000-10-04 |
JP2002539703A (ja) | 2002-11-19 |
FR2790872B1 (fr) | 2003-05-30 |
WO2000055940A1 (fr) | 2000-09-21 |
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