Article
A new decoupling method for quadrature coils in magnetic resonance imaging.
School of Information Technology and Electrical Engineering, University of Queensland, Brisbane QLD 4072, Australia.
IEEE Transactions on Biomedical Engineering (Impact Factor: 2.35). 11/2006; 53(10):21146. DOI: 10.1109/TBME.2006.881783 Source: PubMed

Conference Paper: MIMO capacity improvement in the presence of antenna mutual coupling
[Show abstract] [Hide abstract]
ABSTRACT: Applying MIMO technology in small wireless devices leads to closely spaced antennas, which results in antenna mutual coupling (MC) and highly correlated signals. In this paper, we investigate the effect of the terminal load impedance of the antennas on the MIMO capacity in the presence of the mutual coupling. We use a new concept of receiving mutual impedances to model the MC effect, which has been shown to have a much better performance than the conventional opencircuit voltage method in different applications of array antennas. Simulation results for a 2×2 MIMO system with halfwavelength dipoles in different scattering distribution scenarios, show that in our proposed method, an optimum value of the terminal load impedance ZL of the antennas can be obtained to maximise the capacity for all scattering distributions, whereas the conventional methods need to different ZL in different scattering scenarios.Electrical Engineering (ICEE), 2010 18th Iranian Conference on; 01/2010  [Show abstract] [Hide abstract]
ABSTRACT: Based on the rank reduction theory (RARE), a decoupled method for 2D direction of arrival (DOA) estimation in the presence of elevationdependent mutual coupling is proposed for compact uniform circular arrays (UCAs). Using a new formulation of the beamspace array manifold in the presence of mutual coupling, the azimuth estimates are decoupled from the elevation estimates and obtained with no need for the exact knowledge of mutual coupling. For the elevation estimation, a 1D parameter search in the elevation space for every azimuth estimate is performed with the elevationdependent mutual coupling effect compensated efficiently. Though the computational load for the elevation estimation is increased compared to that of the original UCARARE algorithm, the 1D parameter search in our method overcomes most of the inherent shortcomings of the UCARARE algorithm. This enables unambiguous and paired 2D DOA estimation with the elevationdependent mutual coupling effect being compensated for effectively. Numerical examples are presented to demonstrate the effectiveness of the proposed method.IEEE Transactions on Antennas and Propagation 04/2010; · 2.33 Impact Factor  [Show abstract] [Hide abstract]
ABSTRACT: A short review of the receivingmutualimpedance method (RMIM) for mutual coupling compensation in direction finding applications using linear array is conducted. The differences between the conventionalmutualimpedance method (CMIM) and RMIM, as well as the three different determination methods for receiving mutual impedance (RMI), will be discussed in details. As an example, direction finding with better accuracies is used for demonstrating the superiority of mutual coupling compensation using RMIM.International Journal of Antennas and Propagation 01/2010; · 0.68 Impact Factor
Data provided are for informational purposes only. Although carefully collected, accuracy cannot be guaranteed. The impact factor represents a rough estimation of the journal's impact factor and does not reflect the actual current impact factor. Publisher conditions are provided by RoMEO. Differing provisions from the publisher's actual policy or licence agreement may be applicable.