Additive Manufacturing of Broadband Dielectric Resonator Antennas Using Graded Permittivity and Modal Analysis
Romain Ammar·Phillipe Pouliguen·Claire Le Paven·Ala SHARAIHA·Thomas Lavie·Matthew Julian·Ratiba Benzerga·Sylvain Collardey·Louis Legendre
ABSTRACT This work investigates improving dielectric resonator antenna (DRA) radiation bandwidth through the integration of linearly graded permittivity profiles. Using Characteristic mode analysis (CMA), it is shown that such profiles broaden modal distribution, consequently extending the bandwidth of the dominant resonant mode. The proposed antenna design is enabled by additive manufacturing techniques, which allow precise control over material composition and geometry. Experimental results sh