Miniaturized dual-wideband circular patch antenna for biomedical telemetry

Abstract

A compact dual-wideband circular patch antenna is designed for implanted biomedical data telemetry systems. Several miniaturization techniques were applied to have the resonance at the desired frequencies. The antenna has a radius of 7.5 mm, a thickness of 1.92 mm and a total volume of 340 mm ³ . The antenna covers MedRadio (401-405 MHz), MICS (402-405 MHz), and ISM (433.2-434.8 MHz, 2.4-2.5 GHz) bands with a total bandwidth of 685 MHz. The -10dB bandwidth were 351-476 MHz (125 MHz) and 2.26-2.82 GHz (560 MHz). The antenna performance was evaluated in a human tissue model.