Car phone antenna assembly
US4825217A · kind A · utility
40Cited by
3References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 9, 1988 |
| Grant date | Apr 25, 1989 |
| Priority date | — |
| Expiry date | Feb 9, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/1285
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A car phone antenna assembly which comprises a whip, a base mounted on a window of a car and a coupling unit having the structure for a capacitive tuning circuit. The coupling unit further comprises a coupling plate which acts as a coupling capacitor together with the base, first and second inductor members, and a variable capacitor member which can fine tune the resonant frequency of the antenna assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.