Table II.
Optimized PSC Geometries for IMD Applications
| Parameters | Symbols | 2-Coil | 3-Coil | 4-Coil | |
|---|---|---|---|---|---|
| L1 | Inductance (μH) | L1 | - | - | 0.12 |
| Outer diameter (mm) | D01 | - | - | 25.2 | |
| Fill factor | φ 1 | - | - | 0.24 | |
| Num. of turns | n1 | - | - | 2 | |
| Line width (mm) | W1 | - | - | 2.4 | |
| Line spacing (μm) | S1 | - | - | 150 | |
| Quality factor | Q1 | - | - | 87.4 | |
| L2 | Inductance (μH) | L2 | 1.57 | 1.22 | 0.6 |
| Outer diameter (mm) | D02 | 37 | 43 | 36.5 | |
| fill factor | φ 2 | 0.52 | 0.57 | 0.52 | |
| Num. of turns | n2 | 8 | 8 | 5 | |
| Line width (mm) | w2 | 1.45 | 1.8 | 2.4 | |
| Line spacing (μm) | S2 | 150 | 150 | 150 | |
| Quality factor | Q2 | 165 | 182 | 195 | |
| L3 | Inductance (μH) | L3 | 0.1 | 0.276 | 0.54 |
| Outer diameter (mm) | D03 | 10 | |||
| Fill factor | φ 3 | 0.26 | 0.11 | 0.15 | |
| Num. of turns | n3 | 3 | 4 | 6 | |
| Line width (mm) | w3 | 0.65 | 0.27 | 0.18 | |
| Line spacing (μm) | S3 | 50 | 50 | 50 | |
| Quality factor | Q3 | 127 | 159 | 152 | |
| L4 | Inductance (μH) | L4 | - | 0.11 | 0.16 |
| Outer diameter (mm) | D04 | - | 9.1 | 8.8 | |
| Fill factor | φ 4 | - | 0.19 | 0.25 | |
| Num. of turns | n4 | - | 3 | 4 | |
| Line width (mm) | w4 | - | 0.46 | 0.4 | |
| Line spacing (μm) | s4 | - | 50 | 50 | |
| Quality factor | Q4 | - | 129 | 154 | |
| L1 and L2 coupling distance (nun) | d12 | - | - | 0.1 | |
| L2 and L3 coupling distance (mm) | d23 | 10 | |||
| L3 and L4 coupling distance (mm) | d34 | - | 0.1 | ||
| Power transfer efficiency (%) | η | 75.7 | 78.6 | 83.5 | |
| Power delivered to load (mW) | PDL | 49.5 | 43.4 | 3.9 | |
| Nominal load (Ω) | RL | 100 | |||
| Driver output resistance (Ω) | Rs | 0.5 | |||
| Power carrier frequency (MHz) | f0 | 13.56 | |||
All coils are considered PSC type.
Grayed rows indicate the design constraints.