Method and apparatus for miniaturization of MIMO systems via tightly coupled antenna array
US9001917B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 2014 |
| Grant date | Apr 7, 2015 |
| Priority date | — |
| Expiry date | May 5, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q25/04
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a Multiple Input Multiple Output (MIMO) system, an apparatus and method includes a Tightly Coupled Array antennas (TCA) or Current Sheet Antennas (CSA). Far-field radiation patterns from any current sheet antenna are formed from the combination of the fields generated by a set of currents on the CSA of array port orthogonal modes, such as the Characteristic Modes (CM). The CM currents are generated by excitation of the CSA element ports with corresponding orthogonal voltages or currents (eigenvectors). Since the radiation patterns of the characteristic modes are orthogonal and uncorrelated, multiple signals may be propagated along the radiation patterns of the characteristic modes, each signal using a different characteristic mode or a different set of characteristic modes. Therefore, a CSA antenna utilizing array port orthogonal modes such as array port characteristic modes can support MIMO communications despite the strong mutual coupling among the antenna elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.