Abstract
A metamaterial lens based on a split ring resonator (SRR) array has been designed and optimized to improve the focusing and the penetration depth in human biological tissue of a microwave beam irradiated by a substrate integrated waveguide (SIW) cavity backed patch antenna. The impedance matching of the antenna loaded with human tissue is strongly improved. The simulations have been performed by using CST Microwave Studio®. A prototype of the device has been fabricated with the printed board circuits (PCB) process and has been characterized using a Network Analyzer and an antenna measurement system in anechoic chamber. A novel microwave applicator for hyperthermia therapy of skin cancer could be developed. The performances of the proposed applicator have been evaluated in terms of measured S11 scattering parameter modulus and simulated power loss density. The obtained results indicate that an SRR-based metamaterial is a promising solution for external microwave applicators to employ in dermatology.
Highlights
IntroductionMicrowave applicators for hyperthermia treatment in medical field are suitable antennas irradiating into the tissue to be treated in order to produce a sufficient heating of the entire tumor volume without damages of the surrounding healthy tissue
It consists of a stack structure:designed a microstrip antenna with a circular resonant cavity based on substrate integrated waveguide (SIW) technology
A metamaterial lens based on split ring resonator (SRR) has been designed to be employed as a lens to be put on an SIW cavity-backed patch antenna in order to improve the impedance matching of the antenna when loaded with human tissue and to enhance the focusing of the electromagnetic field into the biological tissue to be treated
Summary
Microwave applicators for hyperthermia treatment in medical field are suitable antennas irradiating into the tissue to be treated in order to produce a sufficient heating of the entire tumor volume without damages of the surrounding healthy tissue. External microwave applicators for superficial cancer, have been investigated and described in literature [7,8,9,10,11,12,13]. They typically consist of a single radiating element or of an antenna array placed in contact with the skin surface. Different shapes—rectangular, circular, and horseshoe—have been considered for the radiating slot of microstrip antennas for microwave hyperthermia treatment of cancer [13]
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call