On the Interest of Using Bravais Lattices for the Synthesis of Effective Permittivity - Application to the Structuration of Dielectric Resonator Antennas With Additive Manufacturing

Dielectric Resonator Antennas (DRA) have been widely investigated in the literature, especially for their high radiation efficiency and a relative easiness to feed them with different techniques. Depending on the application, a wide range of dielectric material can be used. However, for reasons of process reliability, it can be interesting to work with the same raw material and to set its effective permittivity by adjusting a filling ratio between air medium and the raw material. Additive manufacturing is an ideal technology to create this kind of DRAs. In this contribution, a reliable homogenization technique based on Bravais crystalline lattice is proposed. It is used to synthesize the shape of the material to be built with the additive manufacturing process, without any full-wave simulation. After showing validation on measured test vehicles, examples of DRAs are presented.