CDRA on Concave Conformal GP Loaded With Conformal FSS for Biomedical Applications

The development of a conformal frequency selective surface (FSS) loaded on a conformal cylindrical dielectric resonator antenna (CDRA) for the improvement of radiation characteristics for C band applications is presented in this letter. Sinusoidal slot aperture feeding is used for the excitation of the proposed structure. Perturbation on the CDRA is used to improve the impedance bandwidth of an antenna. For obtaining the circular polarization, CDRA is loaded with a conformal FSS at a distance of (2n ± 1) λ/4. To minimize radiation exposure to nearby human bodies, specific absorption rate (SAR) value is calculated, which is less than the 1.6 W/Kg, and the SAR value decreases as the distance between DRA and human head increases. The proposed structure is fabricated, and the measured results are in close agreement with simulated results.