Combination antenna and windshield heater
US5012255A · kind A · utility
38Cited by
4References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 7, 1989 |
| Grant date | Apr 30, 1991 |
| Priority date | — |
| Expiry date | Mar 7, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q13/16
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A motor vehicle windshield is formed with a transparent vapor-deposited metal coating for windshield heating and with an antenna for radio reception. Preferably, the metal coating is connected to an inner conductor of a coaxial cable leading to the radio receiver, while the outer conductor of the coaxial cable is connected to chassis or ground potential. A slot (10, 20, 30, 40, 55, 56) in the metal coating is dimensioned to have a length of some harmonic of one wavelength in the FM frequency band, a width smaller than a half wavelength, and a minimum spacing a from the supply buses on each side of the windshield.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.