Antenna circuit of the negative impedance type
US4442434A · kind A · utility
38Cited by
4References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 13, 1981 |
| Grant date | Apr 10, 1984 |
| Priority date | — |
| Expiry date | Mar 13, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H11/46
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An aerial circuit comprises a first antenna in connection with an impedance, which is a "negative impedance", whereby a broad frequency range is achieved. The "negative impedance" is based on a second antenna similar to the first antenna, whereby the resulting aerial impedance is zero for all frequencies. A corresponding ferrite or loop aerial system is advantageously usable as a stationary system instead of an antenna of the long wire type, and the signal to noise ratio is better than with conventional ferrite antennas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.