Glass antenna system for automobile
US5699071A · kind A · utility
111Cited by
12References
2Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jun 3, 1996 |
| Grant date | Dec 16, 1997 |
| Priority date | — |
| Expiry date | Jun 3, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/1271
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A glass antenna system for an automobile comprises a T-shaped or pi-shaped dynamic impedance matching circuit. Another system comprises an integrated circuit consisting of T-shaped FM and AM matching circuits each connected to a common cable. The T-shaped or pi-shaped matching circuit comprises at least two varactor diodes each applied to a channel selection voltage to match the FM antenna impedance with that of the FM receiver including that of the transmission cable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.