A Compact module-integrated wireless power transfer system with a square metal plate
Proposed module integrated wireless power transfer antenna with a metal plate inside the loop improves transmission efficiency by reducing the change of mutual inductance caused by the change of distance between two antennas. The antenna was designed and implemented on a 1 mm FR-4 substrate.
Operating Frequency : 6.78 MHz
Transmission Coefficient : -0.72 dB (Max. at 50 mm), -6.34 dB (Min. at 1 mm)
Physical Size : 110 × 140 mm2
Metal Plate Size : 55 × 55 mm2