Dielectric Resonator Antenna Geometry-Dependent Performance Tradeoffs

Abstract

A flexible shape generation technique (Surface Contour Shape Generation) is combined with multiobjective evolutionary optimization algorithms in order to synthesize geometrically-diverse dielectric resonator antennas and explore the impact geometry has on relevant performance metrics. It is shown that noncanonical shapes can improve gain and bandwidth when compared to conventional dielectric resonator antenna geometries. Previously described free-form techniques (such as the superformula) have demonstrated improved performance over canonical shapes, but are difficult to integrate with inversedesign. In contrast, the proposed shape generation technique is coupled with multiobjective optimization in order to illustrate the solution space tradeoffs between the various design goals. This technical approach is compatible with various feed designs, antenna performance parameters, and 3D printing techniques.

3D Printing Materials and Techniques for Antennas and Metamaterials: A survey of the latest advances

“…3D printing may not be the optimal manufacturing route for DRAs, but it can provide a quick fabrication route, with extra degrees of freedom in terms of the shape and including heterogenous properties. The bandwidth-versus-the-maximum-gain tradeoff has been analyzed via hundreds of simulations in [56].…”

Utilizing interdigital and supershape geometries for the design of frequency selective surfaces with high angular and polarization stabilities

“…The mathematics behind the superformula are easily understood and given the wide range of applications, both in technology and science like biological organisms and geometric morphometric, indeed the superformula has the potential to transform the perception of symmetry and shape in a profound manner, because of increasing the degrees of freedom. Recently supershapes have been used in the design of antennas 16 – 18 and FSSs 19 , 20 . Indeed, observable figures in nature have served as inspiration for the selection of shapes for radiating elements.…”

A Shape Generation Method for 3D Printed Antennas With Unintuitive Geometries

“…Then, a "base shape" must be defined, which corresponds to the 2D cross-section of the meander line that follows the 3D path to create the geometry. While a circular cross-section is used as the base shape for the helical designs going forward, any closed planar geometry can be implemented including those based on Bezier or spline surfaces [38] or the superformula [39].…”