Loop antenna apparatus with variable directivity
US4358769A · kind A · utility
19Cited by
2References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1981 |
| Grant date | Nov 9, 1982 |
| Priority date | — |
| Expiry date | Feb 11, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q7/00
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A loop antenna apparatus is disclosed which includes a main conductive loop arranged on a first surface, a plurality of supplemental conductive loops connected to the main conductive loop and arranged on different surfaces from the first surface, respectively, a plurality of signal feeding points provided in different loops of the main and supplemental conductive loops, an output terminal and change-over switches for selectively connecting one of the plurality of signal feeding points to the output terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.