US3766563A - Method and means of improving reception of vehicular window-mounted antenna - Google Patents

Method and means of improving reception of vehicular window-mounted antenna Download PDF

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Publication number
US3766563A
US3766563A US00205147A US3766563DA US3766563A US 3766563 A US3766563 A US 3766563A US 00205147 A US00205147 A US 00205147A US 3766563D A US3766563D A US 3766563DA US 3766563 A US3766563 A US 3766563A
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US
United States
Prior art keywords
windshield
band
antenna
voltage
vehicle
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.)
Expired - Lifetime
Application number
US00205147A
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English (en)
Inventor
G Sauer
H Kunert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saint Gobain Industries SA
Compagnie de Saint Gobain SA
Original Assignee
Compagnie de Saint Gobain SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from FR7044007A external-priority patent/FR2117697B1/fr
Priority claimed from FR7141442A external-priority patent/FR2160305B2/fr
Application filed by Compagnie de Saint Gobain SA filed Critical Compagnie de Saint Gobain SA
Application granted granted Critical
Publication of US3766563A publication Critical patent/US3766563A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J1/00—Windows; Windscreens; Accessories therefor
    • B60J1/02—Windows; Windscreens; Accessories therefor arranged at the vehicle front, e.g. structure of the glazing, mounting of the glazing
    • 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

Definitions

  • ABSTRACT Method of and means for improving the receptive qualities of a window or windshield-mounted antenna of an automotive vehicle, by providing a closed annular conductive screen extending about, exteriorly of, adjacent, and in fixed relation with the antenna secured to the surface of a window or windshield, and in grounding such screen from a point thereof to a selected point of the vehicle or the coaxial cable lead-in from antenna to receiver.
  • This invention relates to a methodof and means for improving the receptive qualities of an antenna formed by electricalconductors embedded or disposed in, or affixed on the interior surface of a window or windshield of a vehicle, and to a windshield or window assembly so equipped.
  • the term windshield is to be taken as inclusive of a window of the vehicle.
  • the noise level effective upon a windshield antenna is ordinarily greater than that on an antenna located on but exteriorly of the vehicle, because the conductors forming the receptive part of the antenna are, at least in part, only a very small distance from metallic parts of the body of the vehicle on which the windshield is mounted. Such parts carry or are affectedby numerous sources of voltage and currents all of which create parasitic noise emanations effective upon the antenna and the receiver to which it is connected.
  • such parasitic noise is engendered at least in part, by the electrical equipment of the vehicle such as theignition circuitry, relays, contactors, as well as radiations of variable intensity emanating from sources exteriorly of and apart from the vehicle.
  • the disturbing energies created by components of field intensity parallel with the periphery or circumference of the windshield, and the currents which circulate in the metal of the vehicle body, combine to inductively af- 'fect the receptive qualities of the antenna.
  • the voltage components perpendicular to the peripheral edge of the windshield combine to produce a capacitive effect upon the antenna.
  • the present invention makes use of the known fact that improvement in reception effected by an antenna of the type mentioned, depends not only on the level of intensity of the signal received, but equally importantly, on depression or lowering of the noise level created by parasitic signals effective upon the antenna.
  • the invention differs-from prior art procedures in disposing in the vicinity of and about the periphery of the antenna windshield, a conductor in the form of a closed Sept. I4, 1971, owned by the same assignee as in the present application.
  • the windshield equipped in accordance with the present invention neutralizes or supresses the perturbations otherwise creating an undesirably high noise level in the receiver, establishes in the space enclosed by the annular screening band extending about the periphery of the windshield, a current which changes rapidly and acts to attenuate the electric field therein, more or less strongly, due to the action of the material of the band.
  • the closed screening band is located within or in the immediate vicinity of'material having a dielectric coefficient or insulating property of high value.
  • the rubber gasket conventionally used in mounting the rim of the glass windshield forms an excellent material with the aforesaid property.
  • the ring of adhesive or mastic used to affix the windshield therein is also satisfactorily usable to enclose and support the screening band. In short it is only necessary that the band pass exteriorly about and in the immediate vicinity of the antenna conductors.
  • the screening ring may be connected to the metallic sheath of the coaxial lead-in cable connecting the antenna to the receiver and which has means electrically connecting it to the grounded chassis of the receiver.
  • phase-changing circuitry such as a simple reactance, inductance or capacitance, or an oscillating circuit, to identify with sufficient accuracy the phase of the voltage component required to oppose, annul or suppress the perturbating signals present in the vicinity of the windshield.
  • phase-changing circuitry such as a simple reactance, inductance or capacitance, or an oscillating circuit
  • the peripheral portion of the windshield itself may be used to support the screening band.
  • the screening band may be formed of the same material as the antenna conductors, and similarly applied and affixed by the same procedure and at the same time as the antenna.
  • the screening band of the present invention is readily formed as a closed annulus and its outlet terminal may be located at the same place as that of the antenna but, of course, electrically separated and insulated therefrom.
  • FIG. 1 is a broken vertical section through one construction of windshield embodying the invention, normal to the plane thereof;
  • FIG. 2 is a view like FIG. 1 but showing a modification
  • FIG. 3 is a sectional detail view of a construction embodying the invention, wherein the windshield is adhesively attached within a channel of the vehicle body;
  • FIG. 4 is a view corresponding to FIG. 1 but embodying a one-piece pane of tempered glass
  • FIG. 5 is a view corresponding generally to FIG. 2 but showing a construction wherein is used a single pane of tempered glass, as in FIG. 4;
  • FIG. 6 is a sectional view corresponding to FIG. 3 but embodying a one-piece pane of tempered safety glass as in FIGS. 4 and 5;
  • FIG. 7 is a perspective view of a windshield embodying an antenna and screening band applied directly to the glass pane;
  • FIG. 8 is a schematic view showing a windshieldmounted antenna with means of compensating the voltages engendered in the screening band.
  • FIG. 9 is a schematic view showing a way for compensating the perturbing voltages otherwise effective on the antenna.
  • a windshield 1 of an automotive vehicle and of laminated safety glass construction is mounted in the continuous V-shaped channel of body 3 of the vehicle by means of a rubber gasket or seal ring 2.
  • the antenna 4 is in the form of electrically conductive strips secured to the interior surface of the windshield as by adhesive or by the baking thereon of a liquid or pastelike composition.
  • One terminal end of the antenna has a connector or binding post 5 to which is electrically connected a coaxial input cable including conductor 6 attached to the post and leading to a receiver 7.
  • the cable has outer metallic sheathing 9 with end grounded to the metallic casing or chassis of the receiver.
  • a band 8 which may be of copper and/or of the same conductive material as antenna 4, is embedded in ring 2 and extends continuously in and along the peripheral portion of the windshield.
  • the band forms a shielding screen of the invention and is, as shown, electrically connected at 8a with the sheathing 9 of the receiver input cable.
  • Band 8 being thus connected to the body of the vehicle, collects a large portion of the electromagnetic field developed in the metallic parts of the body 3 by perturbing voltages and currents and which would otherwise deleteriously affect the receptive quality of the antenna and create a high level of noise in the receiver.
  • Sheathing 9 is electrically connected to the casing or chassis of receiver 7 and which, as is well known, is groundedto the metal of the vehicle.
  • FIG. 2 a windshield pane of the same general construction as in FIG. 1.
  • the antenna conductor 4 is similarly attached to the interior surface of the pane and is electrically attached by post 5 to the internal conductor 6 of coaxial cable 9.
  • Rubber ring 12 mounts the pane to the vehicle body 3 in the same general way as in FIG. 1.
  • the screening band 18 of the invention is, in FIG. 2, a fiat closed annulus located and essentially concealed between the rim or periphery of the pane and rubber ring 12.
  • Band 18 may be of the same metallic material as antenna 4.
  • the band has an upwardly-extending and exposed tab affording connection by a binding post 21 to a short run of wire 21a by which it is electrically connected to the metallic sheathing 22 of coaxial cable 9.
  • the inner conductor 6 of this cable electrically connects through binding post or terminal 5, the antenna 4 to the input terminal of receiver 7.
  • the mounting rings 2 or 12 may be formed of a material having a low loss factor.
  • special materials may be interposed between the screening band and the windshield mounting.
  • FIG. 3 shows another way of carrying the invention into practice.
  • the windshield which is of the laminated safety-glass type, has the antenna conductors 24 embedded in the thermoplastic interlayer 25 of the windshield.
  • the windshield is fixed within a channel formed in the vehicle body by and between portions 27 and 28, by means of a mastic or adhesive band 26 and which, as shown, engages the periphery of the pane and forces it against the bead defined by the inwardlycurled exterior rim of portion 28.
  • thermoplastic interlayer 25 Also located or embedded within thermoplastic interlayer 25 is the screening band 29 of electrically conductive material several millimeters in width and forming a closed annulus located outside of and spaced from the antenna conductors 24.
  • the band is electrically connected with the metallic frame or chassis of a receiver, not shown, but like item 7, FIGS. 1 and 2, by a conductor 30.
  • FIG. 4 shows a construction embodying the invention in a manner essentially like FIG. 1.
  • the windshield 31 is composed of a single unitary pane of tempered safety glass.
  • a conductor 36a electrically connects the band to the sheathing 37 of the lead-in cable, as and for the purpose described in connection with FIGS. 1 and
  • the embodiment of FIG. 5 is essentially like that depicted upon FIG. 2 except that windshield 38 is formed of a single unitary pane of tempered safety glass.
  • the antenna and band, 41 and 43 may be formed by the deposition onto the surface of the windshield, of a suitable known conductive liquid or paste, followed by baking thereof to effect firm and permanent adhesion.
  • the windshield mounting depicted upon FIG. 6 is essentially like that shown at FIG. 3 so that it wil be sufficient to identify windshield 46 of a single pane of tempered safety glass, antenna 47 attached to the interior surface of the windshield, vehicle body portion 50 forming a continuous channel for reception of the periphery of the pane, and mastic or adhesive packing 49 interposed in a continuous manner between the periphery of the windshield on its interior surface, and the channel of the body.
  • the screening band 48 having the same function as item 8, FIG. 1; 18, FIG. 2, etc., is embedded in the mastic mounting 49 and, by means not shown, electrically connected with the metallic frame of a receiver such as 7, FIGS. 1 and 2.
  • antenna 47 has a binding post or terminal 47a by which it is connected', as by wire 6 of a coaxial cable as in FIG. 1, to the input of a receiver.
  • FIG. 7 shows in perspective a windshield 51 having affixed to one surface, an antenna including a central branch 52 of T formation, and right and left side branches 53 extending generally parallel with the borders of the windshield and spaced inwardly from the edges thereof by a few centimeters. Being in such close proximity to the metallic body of the vehicle, it is exposed to the perturbing currents and effects thereof flowing therein.
  • the several branches of the antenna are connected to a common terminal 54.
  • a screening band 55 extends continuously along the border of the windshield and is spaced a few millimaters inwardly thereof.
  • this band may be of the same material as that of the antenna 52, 53, and applied in the same manner as and at the same time.
  • the band forms a closed annulus and has the exposed conducting tab 56 extending upwardly from a central point in its lower run, with binding post or terminal 57 for connection with a lead such as 44 FIG. 5, to the sheathing of a coaxial lead-in cable like 42, FIG. 5.
  • FIG. 8 shows an example of compensating the perturbing voltage.
  • the screening band 61 of windshield 60 located and mounted in one of the ways previously described, is connected by a conductor 62 to a point 63 of the engine block 64.
  • Point 63 is determined by a classical measuring instrument. If the voltages present at this point, their frequencies and value, correspond to the perturbing voltages present in the vicinity of the windshield mounting and are of proper phase, the invention will operate at peak efficiency in reduction of the noise level effective otherwise upon the receiver.
  • a complementary electric circuit 66 enables obtention of substantially ideal conditions, namely, the determination of a satisfactory voltage value having a phase opposite to the perturbing voltage.
  • This circuitry 66 includes electronic components which enable adjustment of voltages from a source 64 and adjustment in the phase thereof.
  • circuitry 66 may comprise in general a self inductance, a capacitance and/or an ohmic voltage divider effective as a coupling element.
  • the method of reducing the level of noise signals otherwise inductively effective upon an antenna mounted in or on the windshield of an automotive vehicle, and essentially in the plane of the windshield comprising, surrounding the antenna with an endless electrically conductive bandin adjacent relation therewith in a plane generally parallel to said first-named plane and insulated from the metallic mass of the vehicle, and grounding the band by connecting the same at a point thereof to said mass.
  • grounding of the band being by connection to the metallic sheathing of a coaxial lead-in cable connected to the grounded casing of a radio receiver.
  • antenna conductors secured to or within the windshield in the plane thereof, first lead means to connect said antenna conductors to the input of a receiver, an electrically conductive screening band generally insulated from ground in adjacent surrounding relation with said antenna conductors and in near coplanar relation therewith, and second conductor means to connect said screening band at a point thereof to ground.
  • said antenna conduc-i tors also, being embedded in said thermoplastic layer, within the confines of said band.
  • T and said side wires being connected to a common terminal centrally,of the base portionof the rim of the channel interposed between the rim of said windshield and one side wall of the channel, and a metallic screening band embedded in said ring to extend continuously about and exteriorly of said conductor wires.
  • the method of improving the conditions of reception by a vehicle window antenna which comprises utilizing an endless screening conductor in the zone of the mounting frame around the window and between the frame and antenna, and connecting said endless conductor to a source of voltage that bucks voltage induced in said conductor.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Aerials (AREA)
  • Tyre Moulding (AREA)
US00205147A 1970-12-08 1971-12-06 Method and means of improving reception of vehicular window-mounted antenna Expired - Lifetime US3766563A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7044007A FR2117697B1 (fr) 1970-12-08 1970-12-08
FR7141442A FR2160305B2 (fr) 1971-11-19 1971-11-19

Publications (1)

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US3766563A true US3766563A (en) 1973-10-16

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US00205147A Expired - Lifetime US3766563A (en) 1970-12-08 1971-12-06 Method and means of improving reception of vehicular window-mounted antenna

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US (1) US3766563A (fr)
BE (1) BE776360A (fr)
CA (1) CA942857A (fr)
DE (1) DE2160458C3 (fr)
ES (1) ES397732A1 (fr)
IT (1) IT951602B (fr)
LU (1) LU64412A1 (fr)
NL (1) NL7116778A (fr)
NO (1) NO131317C (fr)
SE (1) SE383447B (fr)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4155090A (en) * 1976-06-03 1979-05-15 Toyota Jidosha Kogyo Kabushiki Kaisha Automobile window glass equipped with thermal defogging wires
US4455682A (en) * 1982-04-05 1984-06-19 Imperial Clevite Inc. Superregenerative radio receiver
US4460894A (en) * 1982-08-11 1984-07-17 Sensor Systems, Inc. Laterally isolated microstrip antenna
US4849766A (en) * 1986-07-04 1989-07-18 Central Glass Company, Limited Vehicle window glass antenna using transparent conductive film
US5072229A (en) * 1988-07-18 1991-12-10 Mazda Motor Corporation Windshield antenna for an automotive vehicle
US5119106A (en) * 1989-09-14 1992-06-02 Nippon Sheet Glass Co., Ltd. Glass window antenna for a motor vehicle
WO1993023890A1 (fr) * 1992-05-18 1993-11-25 Fuba Hans Kolbe & Co. Antenne radio situee a proximite des vitres d'un vehicule
US5285210A (en) * 1990-05-08 1994-02-08 Nippon Sheet Glass Co., Ltd. Double loop antenna with reactance elements
US5565876A (en) * 1990-11-21 1996-10-15 Nippon Sheet Glass Co., Ltd. Window glass antenna
US5712645A (en) * 1995-10-06 1998-01-27 Minnesota Mining And Manufacturing Company Antenna adapted for placement in the window of a vehicle
US5739794A (en) * 1995-05-22 1998-04-14 General Motors Corporation Vehicle window antenna with parasitic slot transmission line
US5793333A (en) * 1995-03-22 1998-08-11 Mazda Motor Corporation Glass antenna for vehicles, and designing method of the same
US5883599A (en) * 1997-01-16 1999-03-16 Ford Motor Company Antenna system for a motor vehicle
US6043782A (en) * 1995-12-18 2000-03-28 Ppg Industries Ohio, Inc. Antenna connector arrangement
US20060097934A1 (en) * 2002-07-24 2006-05-11 Harada Industry Co., Ltd. Integrated loop antenna for vehicular applications
US7297072B2 (en) * 2000-04-18 2007-11-20 Acushnet Company Composite metal wood club

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3604437A1 (de) * 1986-02-13 1987-08-20 Opel Adam Ag Kraftfahrzeug mit einer einen elektrischen leiter aufweisenden scheibe
DE3645101C2 (en) * 1986-05-15 1990-07-05 Adam Opel Ag, 6090 Ruesselsheim, De Holder element for securing vehicle windows
DE10331213B4 (de) * 2003-07-10 2016-02-25 Blaupunkt Antenna Systems Gmbh & Co. Kg Scheibenantenne für den LMK- und diversitären FM-Empfang mobiler Kraftfahrzeuge

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2060418A1 (de) * 1969-12-09 1971-06-16 Asahi Glass Co Ltd Glasscheibenantenne

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2060418A1 (de) * 1969-12-09 1971-06-16 Asahi Glass Co Ltd Glasscheibenantenne

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4155090A (en) * 1976-06-03 1979-05-15 Toyota Jidosha Kogyo Kabushiki Kaisha Automobile window glass equipped with thermal defogging wires
US4455682A (en) * 1982-04-05 1984-06-19 Imperial Clevite Inc. Superregenerative radio receiver
US4460894A (en) * 1982-08-11 1984-07-17 Sensor Systems, Inc. Laterally isolated microstrip antenna
US4849766A (en) * 1986-07-04 1989-07-18 Central Glass Company, Limited Vehicle window glass antenna using transparent conductive film
US5072229A (en) * 1988-07-18 1991-12-10 Mazda Motor Corporation Windshield antenna for an automotive vehicle
US5119106A (en) * 1989-09-14 1992-06-02 Nippon Sheet Glass Co., Ltd. Glass window antenna for a motor vehicle
US5285210A (en) * 1990-05-08 1994-02-08 Nippon Sheet Glass Co., Ltd. Double loop antenna with reactance elements
US5565876A (en) * 1990-11-21 1996-10-15 Nippon Sheet Glass Co., Ltd. Window glass antenna
WO1993023890A1 (fr) * 1992-05-18 1993-11-25 Fuba Hans Kolbe & Co. Antenne radio situee a proximite des vitres d'un vehicule
US5589839A (en) * 1992-05-18 1996-12-31 Lindenmeier; Heinz Radio antenna arrangement located next to vehicle window panels
US5793333A (en) * 1995-03-22 1998-08-11 Mazda Motor Corporation Glass antenna for vehicles, and designing method of the same
US5739794A (en) * 1995-05-22 1998-04-14 General Motors Corporation Vehicle window antenna with parasitic slot transmission line
US5712645A (en) * 1995-10-06 1998-01-27 Minnesota Mining And Manufacturing Company Antenna adapted for placement in the window of a vehicle
US6043782A (en) * 1995-12-18 2000-03-28 Ppg Industries Ohio, Inc. Antenna connector arrangement
US5883599A (en) * 1997-01-16 1999-03-16 Ford Motor Company Antenna system for a motor vehicle
US7297072B2 (en) * 2000-04-18 2007-11-20 Acushnet Company Composite metal wood club
US20060097934A1 (en) * 2002-07-24 2006-05-11 Harada Industry Co., Ltd. Integrated loop antenna for vehicular applications
US7212167B2 (en) * 2002-07-24 2007-05-01 Harada Industry Co., Ltd. Integrated loop antenna for vehicular applications

Also Published As

Publication number Publication date
DE2160458C3 (de) 1980-04-10
CA942857A (en) 1974-02-26
NO131317C (fr) 1975-05-07
NL7116778A (fr) 1972-06-12
NO131317B (fr) 1975-01-27
DE2160458A1 (de) 1972-06-22
DE2160458B2 (de) 1979-08-02
BE776360A (fr) 1972-06-07
ES397732A1 (es) 1975-01-16
SE383447B (sv) 1976-03-08
LU64412A1 (fr) 1972-08-23
IT951602B (it) 1973-07-10

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