LAUSR

This letter proposes an implantable planar inverted‐F antenna for biotelemetry applications, which operates at 2.4 GHz‐2.48 GHz industrial, scientific, and medical band. The antenna is miniaturized by loading a shorting metal surface between the radiating patch and the ground. Moreover, biocompatible substrate‐superstrate layers are used to achieve low specific absorption rate (SAR). We study the performance of antennas at different implant depths. The simulated and measured results show the proposed antenna has higher realized gain of −4.5 dB at 2.45 GHz. The impedance bandwidth (−10 dB) of 180 MHz (2.34 GHz‐2.52 GHz) can be obtained. Moreover, this antenna has a lower SAR value of 113.5 W/kg for a 1‐g standard, which satisfies the regulations in the IEEE standard.