In this paper, we present a 13.56 MHz energy harvester for ‎arterial pressure measurement implants placed at deep ‎distances in human bodies. A 50 μm diameter thin wire is used ‎to fabricate a 150-turns solenoid coil around a PCB stripe ‎with a cross-sectional area of 1.35×1 mm². The solenoid has a ‎length of 12 mm, low-frequency inductance of 4.75 μH, and ‎series resistance of 8 Ω. With this coil and an 11-stage ‎modified differential-drive rectifier, our harvester achieved ‎‎698 nW ‎(–31.56 dBm) sensitivity for unloaded output voltage of 1.88 V ‎and maximum receiver efficiency of >72% at –23.5 dBm ‎available power using 0.0228 mm² active silicon area in ‎‎180 nm technology. A transmission distance of 21 cm was ‎reached under compliance with the field exposure levels set by ‎the IEEE Std. C95.1-2019.‎