EP0851532A1 - Antenne double, en particulier pour véhicule - Google Patents
Antenne double, en particulier pour véhicule Download PDFInfo
- Publication number
- EP0851532A1 EP0851532A1 EP97403142A EP97403142A EP0851532A1 EP 0851532 A1 EP0851532 A1 EP 0851532A1 EP 97403142 A EP97403142 A EP 97403142A EP 97403142 A EP97403142 A EP 97403142A EP 0851532 A1 EP0851532 A1 EP 0851532A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cable
- vehicle
- impedance
- antenna
- transformer
- 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
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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
-
- 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
- H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
-
- 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
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
Definitions
- the present invention relates to dual antennas, for fixed stations or vehicles and, in particular, but not exclusively, the antennas intended for vehicles on wheels and whose frequencies work fall in the VHF / UHF band commonly called VHF and UHF bands according to their acronym in the literature Anglo-Saxon.
- double antenna an antenna made of several radiating elements and arranged to operate in transmission and / or reception in a first frequency band with a first arrangement of the radiating elements and in a second frequency band with a second arrangement; some of these antennas can be used simultaneously in both bands frequencies.
- the object of the present invention is to avoid or, at the very least, to reduce this drawback in dual two-port antennas.
- the antenna according to the invention to supply the unipolar antenna with a secondary transformer connected in series with the radiating element of the unipolar antenna.
- a double antenna is thus proposed, in particular for a vehicle, characterized in that it comprises: a plane of mass pierced by an orifice, with on one side of the ground plane the space outside the vehicle and on the other side a protected space; a cable coaxial which crosses the orifice, with a first end in space outside the vehicle and a second end in the protected space, the cable forming turns between the orifice and its second end; a connection between the external conductor of the cable and the ground plane at second end level; a radiating element of the dipole type, connected, to be powered, at the second end of the cable; a transformer whose secondary includes the external conductor of turns; an impedance of value equal to the characteristic impedance of the cable ; a power cable; and switching means for, either connect the power cable to the second end of the cable coaxial or couple the power cable to the transformer primary and simultaneously connect the second end of the impedance to the internal conductor of the second end of the coaxial cable.
- a double antenna is also proposed, in particular for a vehicle, characterized in that it comprises: a ground plane pierced with an orifice, with one side of the ground plane the space outside the vehicle and on the other side a protected space; a coaxial cable passing through the orifice, with a first end in space outside the vehicle and a second end in space protected, the cable forming turns between the orifice and its second end; a connection between the external conductor of the cable and the plane of mass at the second end; a radiant element of dipole type, connected, to be powered, at the second end of the cable ; a transformer whose secondary includes the conductor external of the turns; an impedance of value equal to the impedance cable characteristic; a first and a second cable food; and connection means to authorize a coupling between the first cable and the transformer primary, between the second cable and the second end of the coaxial cable and between the second end of the impedance and the internal conductor of the second end of the coaxial cable.
- FIG. 1 represents an antenna with switchable elements.
- FIG. 1 represents an antenna with switchable elements.
- the antenna which served as an example for the description which follows track is an antenna intended to operate in the 30-400 band MHz.
- the antenna is shown as it is mounted on the roof metallic, M, seen in section, of a vehicle. It includes, under the roof M, a metal case B, seen in section and the content of which will be described more far ; on the roof M, the antenna has radiating elements protected by a radome 3.
- the radiating elements include a skirted dipole, 1, and a conductive cylindrical section, 20, consisting of the outer conductor of the top of a flexible coaxial cable 2; this coaxial cable passes through the roof M and the lower part is contained in the housing B; cable 2 passes through the roof through a hole circular, with an insulating ring 30 between the cable and the edges of the hole.
- the radome made of dielectric material transparent to waves electromagnetic, keeps the radiating elements in position vertical and makes them integral with the housing B.
- the roof M and the housing B constitute a counterweight for the antenna, i.e. a set of conductors which provides the antenna, isolated from the ground, with a mass reference.
- the skirted dipole 1 has a vertical conductive bar 11 for its upper part and a skirt 12, formed by a conductive tube with a bottom pierced with a hole, for its lower part.
- This dipole is fed in its center by the coaxial cable 2; for that the driver internal 21 of the cable is connected, at its upper end, to the end bottom of the vertical bar 11 and the metal braid which constitutes the external conductor of the cable is connected to the edges of the hole drilled in the bottom of the skirt 12.
- the skirt 12 has only been shown by its traces in the drawing plane, so that you can see how the coaxial cable 2 is connected at its upper end to the dipole 1.
- Cable 2 after having crossed the roof M to enter the case B, wraps around a ferromagnetic core 5 forming a coil 22 then, towards its lower end, has its external conductor connected to box B and its internal conductor connected to the fourth access of a switch, 7, with five ports and two positions.
- Switch 7 is a mechanical switch whose electric control is shown by a broken dashed line 70.
- the first access of switch 7 is connected to the internal conductor of a coaxial power cable 8 which, coming from outside the housing B, leads to a hole drilled in this housing; the metallic braid of external conductor of the cable 8 is welded to the walls of this hole.
- the second access of switch 7 is connected, through a resistor 6, to the housing B.
- the third access is connected, at a point P of the coil 22, to the external conductor of cable 2 and the fifth access is not connected.
- the switch 7 In its high position, as shown in Figure 1, the switch 7 connects its first access to its third access and its second access to his fourth access while in his position low, it connects its first access to its fourth access and its second access to his fifth access.
- the conductors cables 2 and 8 are always interconnected by through the housing B which serves as a mass reference; however the internal conductor of cable 8 is connected at a point P of the conductor external of the coil 22.
- the external conductor of the coil 22, with the core 5, constitutes an autotransformer with: a common point connected to ground, a primary located between ground and point P and a secondary located between the mass and the section 20 which was discussed further during the designation of the radiating elements of the antenna.
- the signal supplied by the cable 8 is applied to the outer conductor of cable 2.
- resistance 6 is chosen, purposely, equal to the characteristic impedance of the transmission line constituted by the coaxial cable 2; and when the switch 7 connects this resistor to the lower end of cable 2, line theory shows that everything is electrically as if the resistor were connected between the upper ends of the inner and outer conductors of the cable 2.
- the pattern radio antenna can be drawn as shown on the figure 2.
- the influence of the skirt 12 of the dipole 1 has been represented by an impedance, 12 ', placed at the end bottom of the skirt. At the frequencies of use considered this impedance is selfic and of negligible value.
- the influence of resistor 6 discussed above is represented by a resistance 6 'equal to resistance 6 and placed between elements 11 and 12.
- the antenna in its configuration according to FIG. 2, is a unipolar antenna charged by a 12 'inductor which has only one role negligible, and by a 6 'resistor which helps to reduce the overvoltage of this unipolar antenna and therefore to broaden its bandwidth.
- This unipolar antenna has, at the level of its foot, a ground plane M constituted by the roof of the vehicle, and is powered at its foot thanks to the autotransformer 22-5 on the primary of which the cable is connected supply 8.
- the antenna radio diagram can be drawn as shown in figure 3.
- the antenna in its configuration according to FIG. 3, is a dipole 11-12 fed in its center by cables 8, 2 placed end to end.
- Curves A2 and A1 represent the current distribution which circulates respectively in the unipolar antenna 20, 12, 11 according to the figure 2 and in dipole 11-12 according to figure 3.
- Figure 4 is the diagram of a first variant on the antenna according to Figure 1. It is a two-port antenna on which two transmitters and / or receivers can be connected respectively but only one of these two transmitters and / or receivers can operate at that time.
- the antenna according to FIG. 4 is not distinguished from that according to the Figure 1 only by a 7 'switch whose wiring is different from that of switch 7, and by the presence of two coaxial cables supply 8a, 8b instead of one.
- the 7 'switch is a mechanical switch with two positions and five accesses in service; its electric control is figured by a broken arrows 70 '.
- the 7 'switch leaves cable 8a without connection to the antenna, but via its third and fourth access, ensures a connection of the internal conductor of cable 8b with the lower end of the conductor internal of cable 2, that is to say with the high frequency dipole antenna.
- the switch leaves the cable 8b without connection with the antenna but, via its first and second access, ensures connection of cable 8a with point P, that is to say with the primary of the unipolar antenna power supply autotransformer low frequency.
- the switch 7 ' via its third and fifth access, connect resistor 6 to the end bottom of the cable's internal conductor 2.
- Figure 5 is the diagram of a second variant on the antenna according to Figure 1. It is a two-port antenna on which two transmitters and / or receivers can be connected respectively with, this time, possibility of simultaneous operation of the two transmitters and / or receivers.
- the antenna according to FIG. 5 is not distinguished from that according to the Figure 1 that by the absence of the switch, replaced by a duplexer 9, by the presence of two coaxial supply cables 8a, 8b and by specific wiring at the cables and duplexer level. Compared on the antenna according to FIG. 4 where the switching was a switching in space using the 7 'switch, this is a switching in frequencies using the duplexer 9.
- the cables 8a, 8b come from outside the housing B, lead respectively into two holes drilled in this housing and have the metallic braid of their external conductor which is soldered to the enclosure wall while their internal conductors extend respectively to point P by a direct link 90 and to the first input of a duplexer 9 whose other input is connected to the resistance 6; the output of the duplexer 9 is connected to the lower end of the internal conductor of cable 2 and the earth of the duplexer is connected to the housing B.
- duplexer 9 everything happens as if it were the resistor 6 which was connected for low frequencies, i.e. for the unipolar antenna, whereas for the high frequencies, that is to say for the operating frequencies of the dipole antenna, everything is goes on as if cable 8b was connected. It should be noted that the operation of the duplexer requires that the frequency band high and low frequencies are separated from each other by the duplex difference specific to the duplexer used.
Abstract
Description
- la figure 1, une vue simplifiée d'une antenne à monopôle surmonté d'un dipôle,
- les figures 2 et 3, des schémas électriques de l'antenne selon la figure 1, dans chacun de ses deux modes de fonctionnement,
- les figures 4 et 5, des schémas de deux variantes à l'antenne selon la figure 1.
- une longueur totale de chacun des éléments 11, 12 égale aux 5/8èmes de la longueur d'onde à 400 MHz soit sensiblement 45 cm,
- une hauteur totale au-dessus du toit M égale aux 5/8èmes de la longueur d'onde à 108 MHz soit sensiblement 170 cm,
- un diamètre de radôme de 20 mm pour conserver une certaine discrétion à l'antenne,
- une impédance caractéristique de travail de 93 ohms ce qui nécessite d'intercaler un transformateur d'impédance entre le commutateur 7 et le câble 8 pour rendre l'antenne compatible avec les postes standardisés sur une valeur d'impédance caractéristique de 50 ohms ; pour ne garder que les éléments nécessaires à la compréhension de l'invention ce transformateur d'impédance n'a pas été dessiné sur les figures.
- le câble coaxial 2 peut être un câble relativement rigide, afin de ne pas avoir à utiliser de radôme ou du moins de radôme rigide et cela sous réserve de rendre suffisamment rigide l'ensemble 1-2 selon la figure 1,
- à la place de l'autotransformateur 22-5, il est possible d'employer un transformateur dont le secondaire serait constitué, par exemple, par la bobine 22 ; le primaire pourrait être constitué par une autre bobine enroulée autour du noyau 5 au-dessus de la bobine 22 avec une première extrémité reliée à la masse, par exemple en contact avec l'extrémité inférieure du conducteur externe du câble 2 ; la seconde extrémité du primaire du transformateur serait reliée au conducteur qui, sur les figures 1, 4 et 5, aboutissait au point P et qui maintenant n'y aboutirait plus, le point P n'ayant, d'ailleurs, plus de rôle à jouer,
- le barreau vertical 11 peut être de plus ou moins grand diamètre et, par exemple, avoir le même diamètre que la jupe ; il peut également être remplacé par un conducteur filaire chargé par des condensateurs c'est-à-dire par un alignement fait de tronçons conducteurs séparés par des condensateurs avec, par exemple, trois tronçons conducteurs et deux condensateurs,
- le dipôle à jupe 1 peut même être remplacé par toute autre antenne de type dipôle, susceptible d'être employée aux fréquences de travail considérées,
- deux filtres peuvent être introduits pour améliorer l'adaptation de l'antenne au poste auquel elle est destinée : un filtre passe-bas pour le fonctionnement dans la bande des fréquences basses et un filtre passe-haut pour le fonctionnement dans la bande des fréquences hautes,
- les fréquences de travail peuvent, surtout en ce qui concerne les antennes pour stations fixes, se situer dans la bande des ondes décamétriques, couramment dite bande HF selon son sigle dans la littérature anglo-saxonne,
- les commutateurs 7 et 7' peuvent être des commutateurs électroniques.
Claims (8)
- Antenne double, en particulier pour véhicule, caractérisée en ce qu'elle comporte : un plan de masse (M) percé d'un orifice, avec d'un côté du plan de masse l'espace extérieur au véhicule et de l'autre côté un espace protégé ; un câble coaxial (2) qui traverse l'orifice, avec une première extrémité dans l'espace extérieur au véhicule et une seconde extrémité dans l'espace protégé, le câble formant des spires (22) entre l'orifice et sa seconde extrémité; une liaison entre le conducteur externe du câble et le plan de masse au niveau de la seconde extrémité ; un élément rayonnant de type dipôle (1), connecté, pour être alimenté, à la seconde extrémité du câble ; un transformateur (5, 22) dont le secondaire comporte le conducteur externe des spires ; une impédance (6) de valeur égale à l'impédance caractéristique du câble ; un câble d'alimentation (8); et des moyens de commutation pour, soit coupler le câble d'alimentation à la seconde extrémité du câble coaxial soit coupler le câble d'alimentation au primaire du transformateur et, simultanément, relier la seconde extrémité de l'impédance au conducteur interne de la seconde extrémité du câble coaxial.
- Antenne double, en particulier pour véhicule, caractérisée en ce qu'elle comporte : un plan de masse (M) percé d'un orifice, avec d'un côté du plan de masse l'espace extérieur au véhicule et de l'autre côté un espace protégé ; un câble coaxial (2) qui traverse l'orifice, avec une première extrémité dans l'espace extérieur au véhicule et une seconde extrémité dans l'espace protégé, le câble formant des spires (22) entre l'orifice et sa seconde extrémité; une liaison entre le conducteur externe du câble et le plan de masse au niveau de la seconde extrémité ; un élément rayonnant de type dipôle (1), connecté, pour être alimenté, à la seconde extrémité du câble ; un transformateur (5, 22) dont le secondaire comporte le conducteur externe des spires ; une impédance (6) de valeur égale à l'impédance caractéristique du câble ; un premier (8a) et un deuxième (8b) câble d'alimentation ; et des moyens de branchement (7' ; 9, 90) pour autoriser un couplage entre le premier câble (8a) et le primaire du transformateur, entre le second câble (8b) et la seconde extrémité du câble coaxial (2) et entre la seconde extrémité de l'impédance (6) et le conducteur interne de la seconde extrémité du câble coaxial (2).
- Antenne selon la revendication 2, caractérisée en ce que les moyens de branchement comportent un dispositif de commutation dans l'espace (7') pour effectuer, sous la commande d'un signal de commande (70) fourni par le dispositif de commutation (7'), soit le couplage entre le premier câble (8a) et le primaire du transformateur et le couplage entre l'impédance (6) et la seconde extrémité du câble coaxial (2), soit le couplage entre le second câble (8b) et la seconde extrémité du câble coaxial (2).
- Antenne selon la revendication 2, caractérisée en ce que les moyens de branchement comportent une liaison directe (90) entre le premier câble (8a) et le primaire du transformateur et un dispositif de commutation en fréquences (9) pour, dans une première bande de fréquences, effectuer le couplage entre l'impédance (6) et la seconde extrémité du câble coaxial (2) et, dans une seconde bande de fréquences, effectuer le couplage entre le second câble (8b) et la seconde extrémité du câble coaxial (2).
- Antenne selon l'une des revendications 1 à 4, caractérisée en ce que le câble coaxial (2) est un câble souple et en ce qu'elle comporte un radôme rigide (3), solidaire du plan de masse (1) et qui entoure l'élément rayonnant de type dipôle (1) ainsi que la partie du câble coaxial (2) située dans l'espace extérieur au véhicule.
- Antenne selon l'une des revendications 1 à 4, caractérisée en ce que l'élément rayonnant de type dipôle (1) est un dipôle à jupe.
- Antenne selon l'une des revendications 1 à 4, caractérisée en ce que le transformateur (5, 22) est un autotransformateur dont le primaire est constitué par une partie du conducteur extérieur des spires (22).
- Antenne selon l'une des revendications 1 à 4, caractérisée en ce que le transformateur (5, 22) comporte un noyau ferromagnétique (5) autour duquel sont enroulées les spires (22).
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9616113 | 1996-12-27 | ||
FR9616113A FR2758011A1 (fr) | 1996-12-27 | 1996-12-27 | Antenne a large bande, en particulier pour vehicule |
FR9713099A FR2758012B1 (fr) | 1996-12-27 | 1997-10-20 | Antenne double, en particulier pour vehicule |
FR9713099 | 1997-10-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0851532A1 true EP0851532A1 (fr) | 1998-07-01 |
EP0851532B1 EP0851532B1 (fr) | 2002-09-11 |
Family
ID=26233220
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97403142A Expired - Lifetime EP0851532B1 (fr) | 1996-12-27 | 1997-12-23 | Antenne double, en particulier pour véhicule |
Country Status (9)
Country | Link |
---|---|
US (1) | US5977920A (fr) |
EP (1) | EP0851532B1 (fr) |
AU (1) | AU4926797A (fr) |
CA (1) | CA2225368A1 (fr) |
DE (1) | DE69715362T2 (fr) |
FR (1) | FR2758012B1 (fr) |
IL (1) | IL122619A (fr) |
NO (1) | NO976107L (fr) |
PL (1) | PL323980A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010102901A1 (fr) * | 2009-03-13 | 2010-09-16 | Thales | Antenne bi-voie large bande vhf-uhf |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2790872B1 (fr) | 1999-03-12 | 2003-05-30 | Thomson Csf | Antenne demontable, a charge capacitive, de type fouet et procede de fabrication d'un segment rayonnant d'une telle antenne |
DE19944505C2 (de) * | 1999-09-16 | 2001-10-18 | Fraunhofer Ges Forschung | Antenne für den Empfang von Satellitensignalen und terrestrischen Signalen und Antennenmodifikationsvorrichtung |
US6329951B1 (en) * | 2000-04-05 | 2001-12-11 | Research In Motion Limited | Electrically connected multi-feed antenna system |
FR2818018B1 (fr) | 2000-12-12 | 2003-02-14 | Thomson Csf | Antenne rayonnante a isolation galvanique |
CA2381043C (fr) * | 2001-04-12 | 2005-08-23 | Research In Motion Limited | Antenne a elements multiples |
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 |
EP1552581B1 (fr) * | 2002-06-21 | 2007-12-26 | Research In Motion Limited | Antenne a elements multiples a coupleur parasite |
US6791500B2 (en) | 2002-12-12 | 2004-09-14 | Research In Motion Limited | Antenna with near-field radiation control |
CA2414718C (fr) | 2002-12-17 | 2005-11-22 | Research In Motion Limited | Systeme d'antenne a deux modes pour emetteur-recepteur |
EP1478047B1 (fr) * | 2003-05-14 | 2007-10-03 | Research In Motion Limited | Antenne multi-bandes à pastille du type microruban comprenant des fentes |
ATE494644T1 (de) * | 2003-06-12 | 2011-01-15 | Research In Motion Ltd | Mehrelement-antenne mit schwimmenden parasitären antennenelement |
CA2435900C (fr) * | 2003-07-24 | 2008-10-21 | Research In Motion Limited | Coussinet conducteur flottant permettant la stabilisation du rendement d'antenne et la reduction du bruit |
DE10341964A1 (de) * | 2003-09-11 | 2005-05-12 | Hirschmann Electronics Gmbh | Antenne für den DVB-T-Empfang |
US7200373B2 (en) * | 2003-09-15 | 2007-04-03 | Silicon Laboratories Inc. | Antenna detection and diagnostic system and related method |
US7053843B2 (en) | 2004-01-20 | 2006-05-30 | Sierra Wireless, Inc. | Multi-band antenna system |
FR2866988B1 (fr) | 2004-02-27 | 2006-06-02 | Thales Sa | Antenne a tres large bande v-uhf |
US7369089B2 (en) * | 2004-05-13 | 2008-05-06 | Research In Motion Limited | Antenna with multiple-band patch and slot structures |
DE102009015699A1 (de) * | 2008-10-30 | 2010-05-06 | Rohde & Schwarz Gmbh & Co. Kg | Breitband-Antenne |
CA2666896A1 (fr) * | 2009-05-27 | 2010-11-27 | Valcom Manufacturing Group Inc. | Doublet colineaire multibande |
FR3059437B1 (fr) * | 2016-11-30 | 2019-01-25 | Continental Automotive France | Procede de diagnostic d'un lien de communication dans un vehicule automobile |
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WO1987000351A1 (fr) * | 1985-06-27 | 1987-01-15 | Richard Shubert | Antenne mobile multipolaire axiale |
DE3826777A1 (de) * | 1988-08-06 | 1990-02-08 | Kathrein Werke Kg | Axiale zweibereichsantenne |
DE4007824A1 (de) * | 1990-03-12 | 1991-09-19 | Lindenmeier Heinz | Fahrzeugantenne fuer funkdienste mit einem stabfoermigen antennenelement |
EP0456337A2 (fr) * | 1990-05-11 | 1991-11-13 | THE GENERAL ELECTRIC COMPANY, p.l.c. | Systèmes d'antenne pour récepteur radio |
DE4321233A1 (de) * | 1992-11-03 | 1994-05-05 | Siemens Ag | lambda/2-Antenne |
US5311201A (en) * | 1991-09-27 | 1994-05-10 | Tri-Band Technologies, Inc. | Multi-band antenna |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US5216434A (en) * | 1989-05-18 | 1993-06-01 | Nec Corporation | Diversity receiving apparatus |
FR2678437B1 (fr) * | 1991-06-28 | 1994-01-28 | France Telecom | Antenne mixte pour reception de signaux emis simultanement par satellite et par stations terrestres, notamment pour la reception de signaux de radiodiffusion sonore numerique. |
US5751253A (en) * | 1995-09-11 | 1998-05-12 | Wells; Donald Horace | Antenna coupling system |
-
1997
- 1997-10-20 FR FR9713099A patent/FR2758012B1/fr not_active Expired - Fee Related
- 1997-12-16 IL IL12261997A patent/IL122619A/xx active IP Right Grant
- 1997-12-19 CA CA002225368A patent/CA2225368A1/fr not_active Abandoned
- 1997-12-19 US US08/994,565 patent/US5977920A/en not_active Expired - Lifetime
- 1997-12-22 PL PL97323980A patent/PL323980A1/xx unknown
- 1997-12-23 EP EP97403142A patent/EP0851532B1/fr not_active Expired - Lifetime
- 1997-12-23 DE DE69715362T patent/DE69715362T2/de not_active Expired - Lifetime
- 1997-12-24 AU AU49267/97A patent/AU4926797A/en not_active Abandoned
- 1997-12-29 NO NO976107A patent/NO976107L/no not_active Application Discontinuation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1987000351A1 (fr) * | 1985-06-27 | 1987-01-15 | Richard Shubert | Antenne mobile multipolaire axiale |
DE3826777A1 (de) * | 1988-08-06 | 1990-02-08 | Kathrein Werke Kg | Axiale zweibereichsantenne |
DE4007824A1 (de) * | 1990-03-12 | 1991-09-19 | Lindenmeier Heinz | Fahrzeugantenne fuer funkdienste mit einem stabfoermigen antennenelement |
EP0456337A2 (fr) * | 1990-05-11 | 1991-11-13 | THE GENERAL ELECTRIC COMPANY, p.l.c. | Systèmes d'antenne pour récepteur radio |
US5311201A (en) * | 1991-09-27 | 1994-05-10 | Tri-Band Technologies, Inc. | Multi-band antenna |
DE4321233A1 (de) * | 1992-11-03 | 1994-05-05 | Siemens Ag | lambda/2-Antenne |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010102901A1 (fr) * | 2009-03-13 | 2010-09-16 | Thales | Antenne bi-voie large bande vhf-uhf |
FR2943183A1 (fr) * | 2009-03-13 | 2010-09-17 | Thales Sa | Antenne bi-voie large bande vhf-uhf |
US9007270B2 (en) | 2009-03-13 | 2015-04-14 | Thales | VHF/UHF broadband dual channel antenna |
Also Published As
Publication number | Publication date |
---|---|
CA2225368A1 (fr) | 1998-06-27 |
EP0851532B1 (fr) | 2002-09-11 |
DE69715362T2 (de) | 2003-04-30 |
FR2758012B1 (fr) | 1999-05-28 |
IL122619A0 (en) | 1998-08-16 |
NO976107L (no) | 1998-06-29 |
IL122619A (en) | 2000-12-06 |
DE69715362D1 (de) | 2002-10-17 |
PL323980A1 (en) | 1998-07-06 |
NO976107D0 (no) | 1997-12-29 |
FR2758012A1 (fr) | 1998-07-03 |
AU4926797A (en) | 1998-07-02 |
US5977920A (en) | 1999-11-02 |
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