Polarization agile antenna
US7667651B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 18, 2005 |
| Grant date | Feb 23, 2010 |
| Priority date | — |
| Expiry date | Jan 31, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/245
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A compact polarization agile antenna includes a dual-orthogonal loop structure which is excited by a single RF feed (21). The loop structure includes a pair of loops (8, 10), each loop is connected to ground (45) through a complex impedance via a solid state switch (41, 43). Current flows in the loop when the switch (41, 43) is closed. The switches (41, 43) and impedances (47, 49) in each leg are independently controlled. Additionally, the relative phase of the current in each leg can be controlled over a narrow bandwidth via a complex impedance for narrowband circular polarized applications. Using this approach, orthogonal linear, slant, or left-hand and right-hand circular polarizations can be generated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.