Circularly polarized reflect array using 2-bit phase shifter having initial phase perturbation
US6351240B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2000 |
| Grant date | Feb 26, 2002 |
| Priority date | — |
| Expiry date | Sep 19, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q9/0421
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An approach for electronically performing beam steering is disclosed. For electronic scanning, an n-bit quantized phase shifting approach is employed at each array element of a phased array antenna. By applying an initial phase bias, either deterministically or randomly, in each of the array elements, the performance of a phased array with n-bit quantization (even with n=2) approaches the performance of a system with no quantization. This approach can be used with linearly polarized or circularly polarized waves. For circularly polarized waves, the 2n phase shifts required of n-bit quantization are achieved in a manner that provides a simple, low-loss construction, which allows production of a low-cost reflectarray or a flat-plate lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.