Coupling an outer antenna with a radio receiver having a bar antenna
US4193076A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1978 |
| Grant date | Mar 11, 1980 |
| Priority date | — |
| Expiry date | Apr 24, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/24
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Coupling an outer antenna with a radio receiver having a bar antenna is achieved by connecting the outer antenna to a coupling coil which is able to be removably mounted on a bar core of the bar antenna and by mounting the coupling coil on the bar core with such an orientation of the coupling coil that the signal received at the outer antenna does not cancel the signal received at the bar antenna. The connection between the outer antenna and the coupling coil may be made by the use of a coaxial cable with the outer conductor of the cable being not grounded to function as a ground plane. A series circuit of a switch and a resistor may be connected in parallel with the coupling coil to selectively reduce the quality factor Q of the bar antenna.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.