A Compact Size Capacitive Load Dual Band Planar Inverted‑F Implant Antenna for Biomedical Services

Abstract

In this work a compact size capacitive load dual band planar inverted-F implant antenna is presented. The suggested antenna is modeled on RO3010 substrate that has a thickness of 2 mm, dielectric constant of 10.2, and tangent loss of 0.0023 to operate at both the Medical Implant Communications Services (MICS) and Industrial, Scientifc, and Medical (ISM) bands. A capacitive load is inserted between the patch and the ground plane to get a dual band and compact size implant antenna. The idea behind the capacitive load is to support a simple structure with a dual band and compact size in addition to get a gain enhance ment. The antenna size is 20×12×2 mm3 . The antenna designed in this work operates at 402 MHz with a return loss of −23.23 dB over a frequency band [397.15–409.4 MHz] for MICS band and operates at 2.42 GHz with a return loss of −20 dB over a frequency band [2.37–3 GHz] for ISM band. The simulated gain is −27.52dBi at 402 MHz for MICS band and −1.85dBi at 2.42 GHz for ISM band. The proposed antenna has a good performance inside three-layered tissue model. The Computer Simulation Technologies (CST) Microwave studio is used to model and simulate the proposed an