Feasibility Study of Using the Housing Cases of Implantable Devices as Antennas

摘要: A novel antenna design for implantable pacemakers is proposed. The housing of a pacemaker utilized as an to cover both the 402–405 MHz Medical Implant Communication Service band and 433-MHz Industrial, Scientific band. This achieved by exploiting radiating characteristic current modes case. These are excited using capacitive coupling element with help matching circuit. radiation pattern this optimized be in desirable direction away from body (off-body direction). ability proposed communications demonstrated transceiver base station at 433 MHz. communication range 1 m established when transmitter implanted rabbit power fed $25~\mu \text{W}$ . longer up 19 can maximum allowable transmit within safety limits. Furthermore, far field wireless transfer through investigated experiment. received $22.38~\mu equivalent isotropically radiated 140 mW transmitted transmitting antenna. From same distance, 4 used recharge small battery or capacitor, which potentially consumption hence extend life span primary battery.