Table 5 Comparison with previous works.
| Â | Proposed | |||||
|---|---|---|---|---|---|---|
Tx (mm\(^2\)) | 60 \(\times\) 60 | 350 \(\times\) 350 | 65 \(\times\) 65 | 80 \(\times\) 80 | 100 \(\times\) 100 | |
Rx (mm\(^2\)) | 60 \(\times\) 60 | 350 \(\times\) 350 | 22 \(\times\) 22 | 40 \(\times\) 40 | 100 \(\times\) 100 | 50 \(\times\) 50 |
Coil size ratio* | 1 | 1 | 0.11 | 0.25 | 1 | 0.25 |
Frequency | 6.78 MHz | 3 MHz | 145 kHz | 15.3 MHz | 6.78 MHz | |
Configuration | Symmetric | Symmetric | Asymmetric | Asymmetric | Asymmetric | |
System | Tunable assistant coils | Coil switching | Coil array | Coil array | Tunable auxiliary coil | |
\(D_z\) | 16.7% | 57.14% | 23% | 18.75% | 15% | |
Max. \(\eta\) | 96.0% | 75.0% | 98.0% | 72.0% | 98.1% | 96.1% |
Min. \(\eta\) @ \(D_x\) \(\le\) 90% | 46.3% | 18.2% | 30.0% | 20.0% | 75.1% | 62.2% |
(@\(D_x\)) | (@ 88.3%) | (@ 90.0%) | (@33.8%) | (@ 62.5%) | (@ 79.0%) | (@ 58.0%) |
Ratio of Min. \(\eta\) to Max. \(\eta\) @ \(D_x \le\) 90% | 0.48 | 0.24 | 0.31 | 0.28 | 0.77 | 0.64 |
Max. \(D_x\) @ \(\eta \ge 60 \%\) | 85.0% | 14.3% | 27.7% | 25.0% | 135% | 95% |
\(\eta\) @ \(D_x'\)** = 100% | 71.0% | 12.6% | 32.0% | 35.0% | 83.0% | 80.0% |
