Electrical signal separating device having isolating and matching circuitry
US4903034A · kind A · utility
5Cited by
24References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 7, 1989 |
| Grant date | Feb 20, 1990 |
| Priority date | — |
| Expiry date | Mar 7, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/1278
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention provides within three particular aspects thereof an isolating and matching device operable to enable an electrically heatable window of a motor vehicle to be used as an efficient VHF communications aerial or antenna; wherein isolating and matching circuitry is provided for Series VHF Matching, Shunt VHF Matching and Split Passband Matching of an electrically heatable window heating element to an aerial input impedance of an aerial feeder circuit of a radio frequency receiver or transmit/receive device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.