Antenna beam forming system
US5233358A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 24, 1989 |
| Grant date | Aug 3, 1993 |
| Priority date | — |
| Expiry date | Apr 24, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q3/22
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An improved antenna beam forming system 10 for generating a set of directed beams wherein each beam may include carrier signals of more than one frequency is disclosed herein. The improved beam forming system of the present invention includes a first beam forming network 20 for providing a first set of signals. The first beam forming network 20 includes a plurality of phase shifting elements 22 for providing a first phase relationship among the first set of signals in response to first carrier signal of a first frequency. The system 10 of the present invention further includes a second beam forming network 30 for providing a second set of signals. The second beam forming network includes a plurality of phase shifting elements 32 for again providing the first phase relationship among the second set of signals in response to a second carrier signal of a second frequency. An array of summing elements 40 for summing respective signals of the first and second sets of signals is included to provide a third set of signals. The third set of signals is transmitted by a phased array antenna 60 thereby providing first and second contemporaneous beams which overlap at a common surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.