EP1711979A1 - Antenne serigraphiee pour vehicule automobile - Google Patents
Antenne serigraphiee pour vehicule automobileInfo
- Publication number
- EP1711979A1 EP1711979A1 EP05717572A EP05717572A EP1711979A1 EP 1711979 A1 EP1711979 A1 EP 1711979A1 EP 05717572 A EP05717572 A EP 05717572A EP 05717572 A EP05717572 A EP 05717572A EP 1711979 A1 EP1711979 A1 EP 1711979A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- antenna
- screen
- aerial
- printed
- rear window
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/1271—Supports; Mounting means for mounting on windscreens
- H01Q1/1278—Supports; Mounting means for mounting on windscreens in association with heating wires or layers
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/002—Heaters using a particular layout for the resistive material or resistive elements
Definitions
- the present invention relates to the antennas fitted to motor vehicles, more particularly the screen-printed antennas on the rear window of such vehicles and especially station wagon motor vehicles.
- the antennas intended to be mounted on board passenger or utility vehicles are increasingly integrated so that they are no longer visible from the outside of the vehicle, allowing the latter to present a more harmonious appearance, in agreement with the current tastes of the public.
- the drawbacks associated with the use of projecting equipment, which relate to aerodynamics, noise, vibration, tightness, vandalism are thus greatly reduced. This being the case, it is important that the antenna is placed in an environment such that it can continue to perform its essential function which consists in transducing an electromagnetic field (external to the vehicle), in an electrical signal exploitable by radio equipment. .
- a compromise is therefore always to be sought between the position of the antenna which is desired to be as less visible as possible and its radiation performance which is all the more affected as the radiative structure of the antenna is integrated into the vehicle and in particular close to its metallic parts.
- car manufacturers attach great interest to a single so-called “multifunction” box, grouping together several functions, which makes it possible to simplify integration into the vehicle and the passage of the cables connecting this box to the radio reception device or to the device that requires signals received by the antenna.
- the FM and SERVITUDE antennas are with linear terrestrial polarization and the reference is an antenna of length equal to a quarter of the wavelength (ie a length of approximately 750 mm for FM and 170 mm for SERVITUDE).
- the current state of the art offers many possibilities for so-called hidden antennas, in particular for the following three radio reception functions: FM radio (Frequency modulation between 76 MHz and 108 MHz); - AM radio (Amplitude Modulation) between 140 kHz and 1.7 MHz); - SERVITUDE function 434 MHz (or 315 MHz for Japan).
- the radiative part of these antennas consists of conductive lines screen printed on the glass part of the vehicle which then serves as a support. The lines have a thickness of 0.8 mm allowing the passage of sufficient and acceptable current for the proper functioning of the defrost.
- each of the FM, AM and SERVITUDE hidden antenna functions implements an aerial and an electronic circuit as close as possible to it.
- the aerial of the AM antenna is formed by one or more conductive lines with a thickness of about 0.8 mm in the central part of the rear window.
- the electronic unit includes an electronic circuit carrying out a high impedance adaptation from the air to the radio receiver.
- the aerial of the FM antenna on the rear window is made up of a number of horizontal conductive lines varying between a minimum of 10 and a maximum of 30. These lines, about 0.8 mm thick, also participate to the defrost function.
- the electronic unit comprises a circuit carrying out the impedance adaptation of the aerial to the characteristic impedance of the coaxial cable leaving the unit, that is to say equal to a value as close as possible to 75 ohms.
- the aerial of the FM antenna on the rear window is made up of a number of conductive lines in the central part of the rear window.
- the electronic unit comprises a circuit carrying out the impedance adaptation of the aerial to the characteristic impedance of the coaxial cable leaving the unit, that is to say equal to a value as close as possible to 75 ohms.
- the SERVITUDE antenna aerial can be identical to the AM aerial or the FM aerial.
- the electronic unit includes an electronic card carrying out the adaptation of the aerial impedance to the impedance of the coaxial cable leaving the housing, that is to say close to 50 ohms.
- This box is said to be passive or active, depending on whether a + 12V power supply is used coming directly or indirectly from the vehicle battery.
- the function of the active box is to amplify the signal with the use of one or more transistors.
- the choice to use an active or passive electronic box is made according to the average gain of the antenna calculated with respect to a reference antenna (quarter wave antenna) on a square ground plane 1.5 m side and 1.5 m high above the ground. In general the minimum acceptable gain with respect to the reference antenna is around -10dB. The average gain is obtained by calculating the average of the 360 measurement values (one measurement at each degree around the vehicle). If with a passive box the antenna is below this limit of -10dB, we generally go to an active box to compensate for the missing dB. In high-end vehicles, FM reception is improved by combining different antennas, ranging from two and up to four, called FMI, FM2, FM3 and FM4. These different antennas can use as support both the rear window or the right and / or left quarter lights.
- the signal on each aerial is taken at a point called a collector using a single wire.
- the connection between the aerial and the wire is made by a press button.
- the other end of the wire is connected to a housing at a distance of not more than 150 mm.
- the different antennas FMI, FM2, FM3 and FM4 can use the same aerial but by placing the collector point differently on it.
- the electromagnetic responses of these antennas, which are the radiation patterns, are different. Indeed these collecting points create different surface currents on these aerials.
- These different antennas can then be combined (signals added or subtracted or switched in rotation) in order to provide an improved output signal compared to a single screen-printed antenna.
- This antenna system is intended for vehicles with a rear window of conventional design, of the extruded type without the application of athermal process.
- the object of the present invention is to propose a screen-printed antenna device for the rear window and the rear window of a station wagon motor vehicle of the general known type mentioned above, which while also ensuring excellent reception of the signals. both in frequency modulation and in the easement function, is of a design and implementation that are particularly simple and economical.
- the screen-printed antenna on the opening rear window and rear window of a station wagon motor vehicle has at least the FM2 and SERVITUDE radio reception functions, each of these antenna functions comprising an aerial and a circuit electronic as close as possible to it, the aerial of the FM2 antenna on the rear window incorporating the defrosting network, and the aerial of the SERVITUDE antenna being supported by the rear window, and it is characterized by that the aerial of the FM2 antenna comprises two vertical lines symmetrical with respect to a median longitudinal vertical plane, which are superimposed on the deicing network.
- the screen printing of the deicing network incorporated in the aerial of the antenna FM2 according to the invention has a U-shape, and the said aerial comprises a screen printed ground line with a length of the order of 530 mm.
- the antenna according to the invention comprises a two-wire cable for taking the FM signal over the air from the FM2 antenna and transmitting it to an electronic unit, this two-wire cable comprising a ground wire connected to ground screen printed and an FM signal wire connected to the symmetrical lines of the screen printed aerial.
- the connection points of the ground wire and the FM signal wire are arranged very close to each other, to allow the use at the end of the two-wire cable of a connector with two press studs.
- the aerial of the SERVITUDE antenna has an F-shape screen-printed on the rear window of the vehicle, which resonates at 434 MHz with an impedance of 50 ohms at its supply point.
- the aerial also includes a screen printed ground line, of the order of 150 mm in length, and a two-wire cable is used to take the SERVITUDE signal from the aerial of the antenna and transmit it to the electronic unit.
- FIG. 2 is a plan view of the opening rear window of a station wagon motor vehicle, serving as a support for the aerial of an FM2 antenna;
- Figure 3 is an elevational view of the aerial of the SERVITUDE antenna fitted to a rear window of the station wagon motor vehicle of Figure 2;
- Figure 4 is a detail view, on a larger scale, of the aerial of the SERVITUDE antenna of Figure 3;
- FIG. 5 is a perspective view of the underside of a double press-stud connector used to connect the two-wire cable to the aerial of the FM2 antenna.
- a station wagon motor vehicle comprising in particular an opening rear window 2 and a right quarter window 3.
- the opening rear window 2 of vehicle 1 serves as support for a screen-printed FM2 antenna and the right quarter window 3 supports the aerial of an antenna SERVITUDE, to provide an FM2 signal for the FM band and a SERVITUDE signal.
- the FM2 antenna consists of an aerial FM2 and an active electronic unit.
- the aerial of the FM2 antenna, which is screen printed on the opening rear window 2 consists of the original deicing network 4 having a U-shape to which are superposed two vertical lines 5 symmetrical with respect to the median longitudinal vertical plane of the vehicle 1.
- the defrosting network 4 comprises defrost collectors 6, 7 which are supplied with their media.
- a thick screen-printed line 8 of about 530 mm in length, is coupled by proximity with a close-up of mass, such as the chassis of the vehicle 1, the internal metal flap of the tailgate or the adhesive for fixing the rear window to the tailgate metallic. Only this screen-printed line 8 can be in the vicinity (see at a distance of less than 10 mm) of a metal part.
- the screen printing 4, 5, 6, 7 which is part of the aerial FM2 must not be too close to the metallic structure of the vehicle 1, since there would be couplings with the metal which would cause a consequent loss of the signal FM2. To avoid this, the screen printing 4, 5, 6, 7 must be at least 7 mm away from the metal edge and there must be no overlap with metal parts of the vehicle 1.
- a filtering and decoupling device is used on the defrost supply wires, connecting the collectors 6, 7 of the defrost network 4 to the positive pole of the battery and to ground.
- This filtering and decoupling device is composed of an inductor placed on the supply wire connected to the positive pole of the battery and an inductor placed on the ground wire, the two inductors being arranged about 100 mm from the defrost collector 6, 7.
- These chokes prevent the radio frequency signal from being leads through the defrost supply wires to the positive or negative terminal of the battery.
- the dimensions of the antenna screen printing depend on the surface of the rear window 2.
- the electronic unit 9 adapts the impedance of the FM2 antenna to 75 ohms.
- the FM2 signal is picked up at connection point 10 by a two-wire cable, consisting of wires 11, 12, having at one end a connector 13 (FIG. 5) of the double press button type engaging the connection point 10 of the network.
- the wires 11, 12 have a length of one meter between the rear window 2 and the electronic unit 9.
- the two-wire cable 11 , 12 can be interrupted by means of a conventional connector 15 to allow the fixing of this two-wire cable 11, 12 to the chassis.
- We choose a length of one meter because it represents a half-wavelength path at 98 MHz in a vehicle-type environment.
- the value of the frequency-dependent impedance can then be different from one vehicle to another.
- the electronic circuit FM2 associated with the electronic unit 9 may also change for each vehicle.
- the choice of a length of the two-wire cable 11, 12 equal to half a wavelength correctly responds to the environment of the cable in the vehicle.
- the impedance of the aerial FM2 at the level of the collector is also found at the entrance of the electronic unit, in detail near the parasitic coupling between the two-wire cable and the chassis.
- the two-wire cable 11, 12 used is composed in the example shown of two flat conductive copper wires (or having a core resistance of less than 40 ohms per km), each wire consisting of a strand of several conductors (between three and ten) for a maximum overall diameter of 0.9 mm.
- the two conducting wires 11, 12 are insulated (working voltage less than 45 V) with a material which complies with the requirements of the vehicle manufacturer 1. The maximum dimensions do not exceed 1.60 X 3.30 mm including sheath.
- the two-wire cable 11, 12 ends at the end of one meter by the connector with double press button 13 which has a center distance of 15 mm.
- the location chosen to install the electronic unit 9 is the interior right or left amount of the vehicle 1, upwards at the level of the sock passing between the chassis and the tailgate of the rear door.
- the housing 9 is rectangular in shape and is arranged on the metal rear board or on the metal upright. It is fixed by a screw to the chassis, which then serves to obtain the ground signal.
- the second antenna fulfilling the SERVITUDE function is represented in FIG. 3. It is composed of an SERVITUDE aerial and of a passive electronic adaptation circuit placed in the electronic unit 9.
- the SERVITUDE aerial consists of a screen printing 15 in form of F (shown on a larger scale in FIG. 4) produced on the right quarter window 3, on the same side of the electronic unit 9.
- a collecting point 17 of the service signal is placed at the end of the horizontal lower branch of the F screen-printed 15.
- a thick screen-printed line 16 ( Figures 3 and 4) is in contact with the adhesive for fixing the rear window 3 to the chassis.
- the glue is deposited in a so-called primary region.
- the length of 400 mm of the two-wire cable 18, 19 is chosen because it represents a path with a wavelength at 434 Mz in a vehicle-type environment.
- the value of l The frequency dependent impedance can then be different from one vehicle to another. This causes a change in the overall response of the air impedance from one car to another.
- the electronic circuit associated with the box may also change for each vehicle. But the choice of a length of the two-wire cable equal to half a wavelength responds correctly in the air environment.
- the impedance of the aerial at the collecting point 17 is also found at the entrance to the electronic unit 9, in detail close to the parasitic coupling between the two-wire cable 18, 19 and the chassis.
- the two-wire cable 18, 19 used has, apart from its length, the same characteristics as those indicated above for the two-wire cable 11, 12 of the FM2 antenna, and it is therefore not necessary to repeat them here.
- This two-wire cable 18, 19 also ends in a connector with a double press button (not shown in the drawing, but which is identical to the connector 13 in FIG. 5), with a center distance of 15 mm.
- This connector cooperates with the collecting point 17 of the screen-printed aerial 15 in the form of an F and with a point 20 of the screen-printed ground line 16, which is chosen in the immediate vicinity of the collecting point 17.
- the dimensions of the screen-printing of the SERVITUDE antennas are defined to resonate the air around 434 MHz, a maximum radiated gain being obtained with an impedance at the air supply point equal to 50 ohms.
- the appropriate dimensions for this purpose of the SERVITUDE 15 aerial being a length of the vertical bar of the F of 130 mm, a distance between the two horizontal bars of the F of 55 mm, a distance of 20 mm between the vertical bar of the F and the ground line 16, and a 10 mm offset between the upper end of the F and the corresponding end of the ground line 16.
- This SERVITUDE antenna system shown in FIG. 3, is suitable for a form of triangular or trapezoid quarter quarter having an approximate area of not less than 0.08 m 2 .
Landscapes
- Details Of Aerials (AREA)
- Support Of Aerials (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0401141A FR2866156B1 (fr) | 2004-02-06 | 2004-02-06 | Antenne serigraphiee pour lunette arriere et lunette de custode de vehicule automobile de type break. |
PCT/FR2005/000269 WO2005078858A1 (fr) | 2004-02-06 | 2005-02-07 | Antenne serigraphiee pour vehicule automobile |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1711979A1 true EP1711979A1 (fr) | 2006-10-18 |
Family
ID=34778553
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05717572A Withdrawn EP1711979A1 (fr) | 2004-02-06 | 2005-02-07 | Antenne serigraphiee pour vehicule automobile |
Country Status (6)
Country | Link |
---|---|
US (1) | US7375692B2 (fr) |
EP (1) | EP1711979A1 (fr) |
JP (1) | JP2007535232A (fr) |
CN (1) | CN1957502A (fr) |
FR (1) | FR2866156B1 (fr) |
WO (1) | WO2005078858A1 (fr) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005009121A1 (de) * | 2004-07-17 | 2006-02-16 | Hirschmann Electronics Gmbh | Kabelsatz, insbesondere für die Anwendung in einem Fahrzeug |
JP4826815B2 (ja) * | 2007-07-09 | 2011-11-30 | 旭硝子株式会社 | 自動車用高周波アンテナ |
DE102008017052B4 (de) * | 2008-04-03 | 2010-07-08 | Kathrein-Werke Kg | Antennenfeld für eine Kraftfahrzeug-Scheibe |
US7748765B2 (en) * | 2008-09-29 | 2010-07-06 | Magna International Inc. | Hinge |
US10389016B2 (en) * | 2014-05-12 | 2019-08-20 | Magna Electronics Inc. | Vehicle communication system with heated antenna |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1202522A (en) * | 1966-08-08 | 1970-08-19 | Triplex Safety Glass Co | Electrical components applied to vitreous bodies |
EP0583264A1 (fr) * | 1992-03-04 | 1994-02-23 | PERESANO, Luciano | Dispositif evitant l'accumulation de neige sur les surfaces limites du mouvement des balais d'essuie-glaces sur le pare-brise des vehicules automobiles |
US5510805A (en) * | 1994-08-08 | 1996-04-23 | Prime View International Co. | Scanning circuit |
US5510804A (en) * | 1994-10-03 | 1996-04-23 | Ford Motor Company | F-shaped three element dipole antenna for motor vehicles |
US5883599A (en) * | 1997-01-16 | 1999-03-16 | Ford Motor Company | Antenna system for a motor vehicle |
DE19806834A1 (de) * | 1997-03-22 | 1998-09-24 | Lindenmeier Heinz | Antennenanlage für den Hör- und Fernsehrundfunkempfang in Kraftfahrzeugen |
-
2004
- 2004-02-06 FR FR0401141A patent/FR2866156B1/fr not_active Expired - Fee Related
-
2005
- 2005-02-07 JP JP2006551889A patent/JP2007535232A/ja not_active Ceased
- 2005-02-07 US US10/588,244 patent/US7375692B2/en not_active Expired - Fee Related
- 2005-02-07 CN CNA2005800042075A patent/CN1957502A/zh active Pending
- 2005-02-07 EP EP05717572A patent/EP1711979A1/fr not_active Withdrawn
- 2005-02-07 WO PCT/FR2005/000269 patent/WO2005078858A1/fr not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO2005078858A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2005078858A1 (fr) | 2005-08-25 |
US7375692B2 (en) | 2008-05-20 |
CN1957502A (zh) | 2007-05-02 |
FR2866156A1 (fr) | 2005-08-12 |
JP2007535232A (ja) | 2007-11-29 |
FR2866156B1 (fr) | 2006-05-05 |
US20070109207A1 (en) | 2007-05-17 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20060731 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR |
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AX | Request for extension of the european patent |
Extension state: AL BA HR LV MK YU |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: VIRATELLE, DIDIER Inventor name: MONDADORI, ALESSANDRO |
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17Q | First examination report despatched |
Effective date: 20100602 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20110901 |