Method and device for coupling cancellation of closely spaced antennas
US8253645B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2006 |
| Grant date | Aug 28, 2012 |
| Priority date | — |
| Expiry date | Nov 21, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/52
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An antenna system comprising at least two antenna radiating elements and respective reference ports the ports being defined by a symmetrical antenna scattering N×N matrix. The system further comprises a compensating network connected to the reference ports. The compensating network is arranged for counteracting coupling between the antenna radiating elements. The compensating network is defined by a symmetrical compensating scattering 2N×2N matrix comprising four N×N blocks, the two blocks on the main diagonal containing all zeros and the other two blocks of the other diagonal containing a unitary N×N matrix and its transpose. The product between the unitary matrix, the scattering N×N matrix and the transpose of the unitary matrix equals an N×N matrix which essentially is a diagonal matrix. The present invention also relates to a method for calculating a compensating scattering 2N×2N matrix for a compensating network for an antenna system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.