Vehicular radio wave receiver and information displaying apparatus with radio wave receiver
US6965347B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 29, 2003 |
| Grant date | Nov 15, 2005 |
| Priority date | — |
| Expiry date | Nov 22, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q13/24
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A receiver includes a circuit board and a dielectric antenna. The circuit board has a receiving circuit on a first surface, and a ground pattern on a second surface. The circuit board is disposed close to a rear window of a vehicle so that the ground pattern faces a roof panel. The dielectric antenna extends from an edge of the circuit board toward and along the rear window. As a result, the roof panel capacitively couples with the ground pattern, so that the roof panel becomes imaginary ground. The dielectric antenna functions as a monopole antenna with the imaginary ground. It is not influenced with a metallic material of the vehicle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.