Method and apparatus for reducing interference among cellular telephone signals
US5444762A · kind A · utility
152Cited by
13References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 8, 1993 |
| Grant date | Aug 22, 1995 |
| Priority date | — |
| Expiry date | Mar 8, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W84/06
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Directional antennae on aircraft and on cellular telephone base stations, having a polarity opposite that of potentially interfering ground system signals, minimize signal strength of air cellular signals received by ground cellular stations. Aircraft directional antennae comprise patch antennae or vertical arrays of loop elements or vertical arrays of virtual loop elements. Additionally, air cellular signals are switched to channels not currently in use by ground cellular systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.