US3832714A - Windshield antenna - Google Patents

Windshield antenna Download PDF

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Publication number
US3832714A
US3832714A US00415487A US41548773A US3832714A US 3832714 A US3832714 A US 3832714A US 00415487 A US00415487 A US 00415487A US 41548773 A US41548773 A US 41548773A US 3832714 A US3832714 A US 3832714A
Authority
US
United States
Prior art keywords
loops
windscreen
row
vehicle
rear view
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
US00415487A
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English (en)
Inventor
F Cleminson
B Ariss
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.)
Pilkington Automotive Ltd
Original Assignee
Triplex Safety Glass Co
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
Application filed by Triplex Safety Glass Co filed Critical Triplex Safety Glass Co
Application granted granted Critical
Publication of US3832714A publication Critical patent/US3832714A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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

  • a vehicle windscreen is provided with electrical antenna conductors in the form of a row of open loops connected to at least one straight horizontal arm.
  • the loops lie in an area corresponding to the rear view mirror position. In situ in a vehicle the loops do not project below the lower edge of the rear view mirror and the loop do not project beyond the lateral edge of the mirror. Between three and 12 loops may be provided and they may be connected to a second horizontal conductor arm. A vertical conducting arm may also be connected to the row of loops.
  • the conductors may lie on the inner surface of the windscreen.
  • the invention relates to vehicle windscreens and in particular to a vehicle windscreen including electrical antenna conductors.
  • Vehicle windscreens which are provided with electrical antenna conductors. Some difficulties have arisen in arranging the conductors so as to provide sufficient signal strength for a radio receiver while avoiding undesirable obstruction of vision through the windscreen.
  • the present invention provides a vehicle windscreen provided with electrical antenna conductors, said conductors including a plurality of open loops located in the area corresponding to the rear view mirror position, said loops being joined in succession to form a row of loops extending along an upper part of the windscreen and spaced from the upper edge of the windscreen and at least one straight horizontal arm being connected to one end of the row of loops also extending along the upper part of the windscreen, the loops forming the antenna being located in the area behind the rear view mirror position so that the loops do not project substantially beyond the lateral edges of said area andthe height of the loops in the row being such that they do not project substantially below the lower edge of the said area.
  • Such an arrangement of antenna conductors enables the aerial to provide sufficient signal strength for an AM radio receiver and the loops do not project sufficiently far down the windscreen to interfere with vision through the windscreen.
  • All the loops forming the antenna are located in the area corresponding to the rear view mirror position so that the loops do not project substantially beyond the lateral edges of the rear view mirror. This reduces interferance with vision to a minimum.
  • the antenna conductors comprise from three to 12 loops and in some cases from six to 12 loops.
  • the loops are not less than 1 inch high. In this way, satisfactory signal strength may be provided.
  • the length of the row of loops is greater than the height of the loops.
  • Such an arrangement is of practical convenience in that rear view mirrors normally have greater width than depth.
  • the loops lie within an area 9 inches wide by 4 inches deep at the maximum and spaced from the upper edge of the windscreen by a distance not greater than 3 inches.
  • two straight horizontal arms may be provided, one at each end of the row of loops.
  • a straight vertical arm may be connected tothe row of loops.
  • FIG. 1 shows a vehicle windscreen with a known T- shaped aerial, not embodying the present invention
  • FIG. 2 shows a further embodiment of the invention in which a single horizontal arm is added to the row of loops,
  • FIG. 3 shows a further embodiment of the invention in which'two horizontal arms are connected to the row of loops
  • FIG. 4 shows a further embodiment of the invention in which the antenna conductors consist of a row of loops together with one horizontal arm and one vertical arm,
  • FIG.'5 shows a further embodiment of the invention in which two horizontal arms and one vertical arm are added to the row of loops
  • FIG. 6 shows schematically a vehicle incorporating a windscreen embodying the invention.
  • FIG.l a vehicle windscreen 11 is shown with a known aerial arrangement for a radio receiver.
  • the aerial consists of two horizontal conducting arms 12 and 13 joined to a vertical arm 14 having a suitable termination 15 at its lower end for use in connecting the aerial to a radio receiver.
  • FIGS. 2 to 5 show various alternative embodiments of the present invention which all differ from the arrangement shown in FIG. 1 in that the antenna conductors include as well as a horizontal arm 18, a plurality of open loops joined in succession to form a row of loops in the upper central part of the windscreen and in the area normally behind a rear view mirror.
  • the row of loops 16 extends horizontally along the upper part of the windscreen 11 so that the upper edge of the loops is spaced from the top of the windscreen and the lower edge of the loops does not project below the lower edge of the rear view mirror position in the motor vehicle.
  • the position of the rear view mirror is shown by-broken lines 17.
  • FIG. 1 the antenna conductors include as well as a horizontal arm 18, a plurality of open loops joined in succession to form a row of loops in the upper central part of the windscreen and in the area normally behind a rear view mirror.
  • the row of loops 16 extends horizontally along the upper part of the windscreen 11 so that the upper edge of the loops
  • a single straight horizontal arm 18 is connected to one end of the row of loops and extends parallel to and spaced from the upper edge of the windscreen.
  • a suitable termination 15 is provided at the end of the arm 18 remote from the row of loops 16.
  • the termination 15 may be provided at the free end of the row of loops 16.
  • Such an alternative is marked 15a in FIG. 2.
  • a sec- 0nd straight horizontal arm 19 is connected to the other end of the row of loops 16.
  • FIGS. 4 and 5 are generally similar to those shown in FIGS. 2 and 3 except that a vertical arm 14 is in each case connected to the row of loops 16. The upper end of the vertical arm is in each case connected to the row of loops mid-way along the row of loops.
  • the termination 15 is shown at the end of the horizontal arm 18, it may alternatively be provided at the free end of the row of loops 16 (FIG. 4) or at the end of the other horizontal arm (FIG. 5) or at the bottom of the vertical arm (FIGS. 4 and 5). Alternatively in all the arrangements of FIGS. 2, 3, 4 and 5 the termination 15 may be provided at a point intermediate the ends of the row of loops 16, preferably at the centre of the row of loops 16, as marked 15b in FIG.
  • the loops 16 all lie in a single plane with each loop consisting of a rounded S-shaped portion lying on its side.
  • the number and size of loops may be varied to suit the vehicle and radio receiver being used.
  • the shape of the loops may also be varied, for example the S-shape could be squared up or a straight sided zig-zag could be inches and in each case the mirror is situated centrally 1 across the width of the windscreen.
  • Example 1 given in the Table is the known configuration of aerial shown in FIG. 1 of the accompanying drawings.
  • Examples 2 to'10 show various examples in accordance with the present invention, in each case the height of the loops was 3 inches and the length of the row of loops was 6 inches.
  • the loops 16 In order that the loops 16 do not project substantially beyond the lateral edges or below the lower edge of the rear view mirror, the loops will in general lie within an area not more than 9 inches wide by 4 inches deep, the
  • the following Table 2 gives the relative signal strengths achieved with different configurations of aerial.
  • the Table gives the signal strength in millivolts as measured with a radio frequency voltmeter of the heterodyne type for the AM. transmissions of BBC Radio TABLE 2 Signal Number Arranged Terminal Strength 0 of as Connection Millivolts Example loops shown in at end of A.M. Radio 2 1 known T vertical 23.0
  • FIG. l v v 2 6 FIG. 2 horizontal 21.0
  • FIG. 2 horizontal 21.4 I I arm 4 10 FIG. 2 horizontal 21.6
  • FIG. 2 horizontal 20.6
  • the signal strengths represent good reception in being greater than a value of 19.0 millivolts.
  • the antenna conductors may be positioned in one of the glass/interlayer interfaces or preferably on one of the exposed glass surfaces, particularly that which will be inside the vehicle.
  • the antenna conductors t are preferably positioned on the surface that is to be inside the motor vehicle. It is however possible to locate the conductors on the outer surface.
  • the conductors may be wire or a deposit of some conducting material although wire can only be used with a laminated windscreen when it will usually be positioned in one of the glass/interlayer interfaces.
  • the wire may for example be 24 gauge copper wire, that is wire having a diameter of 22 thousandths of an inch. If a conducting deposit is used, this may be applied by a silk screen printing process using an ink which is fired onto the glass surface and preferably that surface which will lie inside the vehicle.
  • the ink may contain a silver compound and a low melting point glass frit as referred to in British Pat. No. 1145367.
  • Suitable commercially available inks are supplied for example by Degussa under thereference number 314E and by DuPont under reference numbers EX 8438R and EX 8439R and EX 8448R.
  • an ink formed of a silver I oxide organic silver salt complex supplied by Englehard may be used.
  • the width of the printed line is in the region of 0.4 millimetres and may for example be 0.35 millimetres. Firing of the ink occurs during heating the glass for bending and toughening when the, glass is at approximately 650C.
  • FIG. 6 shows the use of the invention in a motor car 20.
  • the car 20 has a windscreen 11' incorporating antenna conductors having the general arrangement described with reference to FIG. 3.
  • the loops l6 lie wholly behind a rear view mirror 21 which is fixed adjacent the upper central part of the windscreen.
  • the terminal is connected by a suitable conductor to an A.M..radio receiver mounted within the vehicle.
  • a vehicle windscreen provided with electrical antenna conductors, said conductors including a plurality of open loops located in the area corresponding to the rear view mirror position, said loops being joined in succession to form a row of loops extending along an upper part of the windscreen and spaced from the upper edge of the windscreen and at least one straight horizontal arm being connected to one end of the row of loops also extending along the upper part of the windscreen, the loops forming the antenna being located in the area behind the rear view mirror position so that the loops do not project substantially beyond the lateral edges of said area and the height of the loops in the row being such that they do not project substantially below the lower edge of the said area.
  • a vehicle windscreen according to claim 1 in which the loops are not less than 1 inch high' 5.
  • a vehicle windscreen according to claim 1 in which a straight vertical arm is connected to the row of loops.
  • a vehicle windscreen according to claim 1 including two straight horizontal arms one connected to each end of the row of loops.
  • a vehicle windscreen according to claim 1 in which the end of an arm remote from the row of loops is used as a terminal for connecting the antenna to a receiving circuit.
  • a vehicle windscreen according to claim 1 in which a connecting terminal is provided at a free end of the row of loops.
  • a vehicle windscreen according to claim 1 in which a connecting terminal is provided at a point interrnediate the ends of the row of loops.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)
  • Surface Heating Bodies (AREA)
US00415487A 1972-11-14 1973-11-13 Windshield antenna Expired - Lifetime US3832714A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5257772A GB1417715A (en) 1972-11-14 1972-11-14 Vehicle windscreens

Publications (1)

Publication Number Publication Date
US3832714A true US3832714A (en) 1974-08-27

Family

ID=10464463

Family Applications (1)

Application Number Title Priority Date Filing Date
US00415487A Expired - Lifetime US3832714A (en) 1972-11-14 1973-11-13 Windshield antenna

Country Status (10)

Country Link
US (1) US3832714A (zh)
JP (1) JPS5024928A (zh)
BE (1) BE807287A (zh)
CA (1) CA988203A (zh)
DE (1) DE2355124A1 (zh)
FR (1) FR2206205B1 (zh)
GB (1) GB1417715A (zh)
IT (1) IT996959B (zh)
SE (1) SE387476B (zh)
ZA (1) ZA738403B (zh)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2513021A1 (fr) * 1981-09-15 1983-03-18 Siv Soc Italiana Vetro Antenne multibande, notamment pour vitre de vehicule automobile
DE3315458A1 (de) * 1983-04-28 1984-11-08 Gerhard Prof. Dr.-Ing. 8012 Ottobrunn Flachenecker Aktive windschutzscheibenantenne fuer alle polarisationsarten
US5027128A (en) * 1990-01-18 1991-06-25 Blaese Herbert R Inside window antenna
EP1120852A1 (en) * 2000-01-28 2001-08-01 Mazda Motor Corporation Antenna structure for vehicle
US20130300146A1 (en) * 2011-01-14 2013-11-14 Asahi Glass Company, Limited Automobile window glass

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5969507U (ja) * 1982-10-30 1984-05-11 松下電器産業株式会社 車載用受信機のアンテナ装置
JPS6269704A (ja) * 1985-09-21 1987-03-31 Nippon Sheet Glass Co Ltd アンテナ
JPS6432703A (en) * 1987-07-29 1989-02-02 Mazda Motor Antenna system for vehicle
JPH09130124A (ja) * 1995-08-28 1997-05-16 Mazda Motor Corp ガラスアンテナ、アンテナおよびその設定方法
JP3741315B2 (ja) * 1995-08-28 2006-02-01 マツダ株式会社 ガラスアンテナ及びアンテナ
US6018322A (en) * 1996-03-13 2000-01-25 Mazda Motor Corporation Earth structure for antennas, and antenna apparatus with earth for vehicles

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3414902A (en) * 1965-12-06 1968-12-03 Ppg Industries Inc Laminated windshield with radio antenna

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7010571U (de) * 1970-03-21 1970-07-13 Ver Glaswerke Gmbh Autosichtscheibe mit eingearbeiteter antenne.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3414902A (en) * 1965-12-06 1968-12-03 Ppg Industries Inc Laminated windshield with radio antenna

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2513021A1 (fr) * 1981-09-15 1983-03-18 Siv Soc Italiana Vetro Antenne multibande, notamment pour vitre de vehicule automobile
US4527164A (en) * 1981-09-15 1985-07-02 Societa Italiana Vetro-Siv-S.P.A. Multiband aerial, especially suitable for a motor vehicle window
DE3315458A1 (de) * 1983-04-28 1984-11-08 Gerhard Prof. Dr.-Ing. 8012 Ottobrunn Flachenecker Aktive windschutzscheibenantenne fuer alle polarisationsarten
US5027128A (en) * 1990-01-18 1991-06-25 Blaese Herbert R Inside window antenna
EP1120852A1 (en) * 2000-01-28 2001-08-01 Mazda Motor Corporation Antenna structure for vehicle
US6310580B2 (en) 2000-01-28 2001-10-30 Mazda Motor Corporation Antenna structure for vehicle
US20130300146A1 (en) * 2011-01-14 2013-11-14 Asahi Glass Company, Limited Automobile window glass

Also Published As

Publication number Publication date
SE387476B (sv) 1976-09-06
GB1417715A (en) 1975-12-17
CA988203A (en) 1976-04-27
FR2206205B1 (zh) 1977-06-03
AU6224573A (en) 1975-05-08
IT996959B (it) 1975-12-10
ZA738403B (en) 1974-09-25
DE2355124A1 (de) 1974-05-22
JPS5024928A (zh) 1975-03-17
FR2206205A1 (zh) 1974-06-07
BE807287A (fr) 1974-03-01

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