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Windshield antenna with coupling network in the leadin
| Details |
Inventors: Kunert, Heinz; Moebs, Heinz; Sauer, Gerd;
Assignee: Saint-Gobain Industries (Neuilly-sur-Seine, FR)
Primary Examiner: Lieberman; Eli
Assistant Examiner:
Attorney, Agent or Firm: Pennie & Edmonds
Antennas are applied to broad surfaces of electrically non-conductive material, and electronic adapters such as self-inductors, transformers, and capacitors are constructed in the same way and attached to the antenna on the surface of the material, affording improved output of the antenna and better reception in the receiver. Such apparatus is useful on vehicular windshields such as those of aircraft and automobiles, and on the windows of buildings such as of apartment houses. |
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DETAILED DESCRIPTION What is claimed is: 1.
A window comprising a sheet of glass, an elongated antenna having a pair of conductors affixed to one surface of said sheet, an output terminal fixedly mounted on said surface of said sheet, first conductive means constituting a discrete lumped electrical reactance affixed to said surface of said sheet, said first conductive means including in series an inductive reactance and a capacitive reactance, second conductive means affixed to said surface of said sheet and conductively connecting said conductors to the ends of said inductive reactance, and third conductive means affixed to said surface of said sheet and conductively connecting said capacitive reactance to said output terminal, said conductors and each of said conductive means consisting essentially of a conductive composition of silver paste baked onto said surface of said sheet.
2.
The window of claim 1 wherein said capacitive reactance is connected at a middle turn of said inductive reactance.
3.
The window of claim 2 wherein said capacitive reactance includes oppositely disposed combs with intercalated teeth.
Description:
This invention relates to windows with antenna incorporated.
As such are of value in automobiles, the invention will be described in its application to an automobile windshield without limiting the generality of its application, which is equally useful in aircraft and buildings, such as apartment houses.
A number of forms of such windshields are known, for instance one in which the antenna is incorporated in the plastic interliner of sandwich type safety glass and another in which it is applied to the inner or outer surface of a single sheet of tempered glass.
Such antenna have been made from conductive lines, printed on the surface of the pane, composed of silver paste and baked on.
Although the antenna can be placed on any pane of the car it is usually applied to the windshield because of proximity to the receiver, which provides a minimum length of lead, whereas to apply it to the back window leaves the windshield unobstructed but demands a long lead, which requires some sort of booster to overcome the drop in voltage
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Radio 
