Antenna For Early Detection Of Skin Sarcoma By Resonant Frequency Shift

In this paper, a small antenna is proposed to diagnose skin sarcoma at an embryonic stage. The antenna has an area of
$30.54 \times 15.27\ \text{mm}^{2}$
and resonates at 1429 MHz with a reflection coefficient of −17.64 dB. The structure consists of a
$35 \mu \mathrm{m}$
copper sheet etched on a 1.6 mm FR-4 substrate. The diagnosis is based on the resonance frequency shift, and the SAR (Specific Absorption Rate) variation when the antenna is positioned on malignant tissue. For the simulations, a three-layer body phantom (skin, fat, muscle), and a half-sphere tumor phantom were considered. Simulations of the antenna performances showed that for a tumor of
$100\ \mu \mathrm{m}$
, the resonant frequency, and the SAR decrease by 2 MHz, and 1.09 mW/Kg, respectively. In addition to sarcoma detection, the antenna's 3.6 dBi gain allows for 124.47 m biomedical communication links in a complex environment.