Vehicle window glass antenna using transparent conductive film
US4849766A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 1987 |
| Grant date | Jul 18, 1989 |
| Priority date | — |
| Expiry date | Jul 2, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/1271
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The invention relates to a receiving antenna disposed on or in a vehicle window glass such as the rear window glass or the windshield of an automobile. The antenna comprises, as a principal antenna element, a transparent and conductive film in the shape of a quadrilateral having two substantially parallel sides one of which is at a distance of 15-25 mm from the upper edge of the window glass and the other at a distance of 15-25 mm from the lower edge. The quadrilateral film may be so wide that the remaining two sides thereof extend along the two side edges of the window glass, respectively, at a distance of 15-25 mm from the respective side edges. This is suitable for reception of not only FM radio broadcast waves in the 76-90 MHz or 88-108 MHz band and TV broadcast waves in the 90-222 MHz band but also AM radio broadcast waves. When the antenna is mostly for reception of FM radio broadcast waves and/or TV broadcast waves, it is suitable that the transparent and conductive film is in the shape of a rectangle which is elongate in the direction substantially perpendicular to the upper and lower edges of the window glass and has a lateral width in the range from 50 to 250 mm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.