Glass antenna device for vehicle
US6229493A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 15, 1999 |
| Grant date | May 8, 2001 |
| Priority date | — |
| Expiry date | Nov 15, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/1278
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A glass antenna device for a vehicle includes an FM reception antenna and an AM reception antenna both provided on a window glass of the vehicle, an AM-antenna-side impedance converter and a receiver-side impedance converter disposed at a different position from the window glass, a first coaxial cable interconnecting the two impedance converters, a receiver, and a second coaxial cable interconnecting the receiver-side impedance converter and the receiver. The distributed capacitance of the second coaxial cable is not in excess of 10 pF, so that the vehicle glass antenna device can reduce transmission loss at transmission lines, thus ensuring reception of AM signals at high sensitivity with little attenuation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.