Compact Slot Microstrip Patch Antenna Loaded with Open Metal Cavity for Microwave Hyperthermia
Traditional cancer treatment methods often have serious side effects.As a minimally inva-sive,efficient,and low toxicity green treatment method,microwave hyperthermia has been increasingly favored by more people in recent years.This study focuses on the design and evaluation of a miniaturized slit patch antenna with an operating frequency of 2450 MHz for hyperthermia treatment.The antenna patch is octagonal and incorporates four symmetrical slots to reduce size and improve directional radiation.An open metal cavity is added between the antenna and the tissue to maintain a preset distance,prevent direct contact between the patch and the skin,achieve better impedance matching,and reduce energy radiation to the surrounding area.The performance of the antenna is evaluated based on specific absorption rate(SAR),penetration depth(PD),and effective field strength(EFS).The antenna is fabricated and tested in pork tissue,and the measurement results are in good agreement with the simulation results.
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