Antenna system with variable directivity
US4338606A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1979 |
| Grant date | Jul 6, 1982 |
| Priority date | — |
| Expiry date | Dec 18, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q9/265
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An antenna system is disclosed which has a loop antenna divided into n conductive members at n pairs of divisional points where n is a positive integer not smaller than 2, n feeders connected to the n pairs of divisional points respectively, a signal feeding point, and at least one impedance element. In this case, electrical switching circuits are connected between the n feeders and the impedance element, and an electrical control circuit is connected to the electrical switching circuits for selectively connecting the feeding point to one of the n feeders and at the same time for selectively connecting the impedance element to another of the n feeders, so that the directivity characteristic of the antenna system is variable controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.