Open Access3D‐printed ceramics with engineered anisotropy for dielectric resonator antenna applications
Author(s) -
Morales C. D.,
Morlaas C.,
Chabory A.,
Pascaud R.,
Grzeskowiak M.,
Mazingue G.
Publication year - 2021
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/ell2.12234
Subject(s) - anisotropy , materials science , dielectric resonator , ceramic , dielectric , dielectric resonator antenna , microwave , reflection coefficient , birefringence , antenna (radio) , reflection (computer programming) , optoelectronics , resonator , optics , axial ratio , composite material , microstrip antenna , electrical engineering , telecommunications , physics , engineering , computer science , programming language
In this letter, we study the design of three‐dimensional (3D)‐printed ceramics exhibiting anisotropic dielectric permittivities at microwave frequencies for dielectric resonator antenna (DRA) applications. The anisotropy is engineered by using periodic structures made up of subwavelength asymmetric unit cells filled with zirconia and air. Ceramic samples with uniaxial anisotropy are designed, 3D‐printed, and measured. Birefringence up to 8 is achieved by controlling the volume fill rate of the unit cell. Besides, a single‐fed circularly polarised (CP) DRA that relies on a 3‐D‐printed uniaxial anisotropic ceramic is proposed in the 2.45 GHz ISM band. Its simulated and measured reflection coefficient, axial ratio, and realised gain patterns are in good agreement, thus demonstrating the possibility of exploiting 3‐D‐printed anisotropic ceramics for DRA applications.