Antenna arrays with dual circular polarization
US8081135B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2006 |
| Grant date | Dec 20, 2011 |
| Priority date | — |
| Expiry date | Nov 8, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/24
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The invention consists of an antenna array, for the reception of two frequency bands, comprising two pairs of radiating elements and an network for excitation of these elements for the reception of one of the bands. The radiating elements are positioned so as to free the center of the array to allow colocalized reception of the other band. The excitation network comprises hybrid elements so as to introduce a certain phase shift between the radiating elements allowing a dual circular polarization. This network must comply with two constraints: The phase shift introduced between the hybrids must be equal to the phase shift of the hybrid modulo 2 integer. and the length of the line L1 placed between the first hybrid H1 and the first patch PA1 is such that it introduces a phase shift equal to π modulo 2 integer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.