An Array of Tilted Dipoles Loaded with Artificial Dielectrics with an Asymmetric Pattern
Cristina Yepes Julia (TU Delft - Electrical Engineering, Mathematics and Computer Science)
Andrea Neto (TU Delft - Electrical Engineering, Mathematics and Computer Science)
Daniele Cavallo (TU Delft - Electrical Engineering, Mathematics and Computer Science)
E Gandini (TNO)
Frank E. Van Vliet (TNO)
Stefania Monni (TNO)
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Abstract
We present the design of an array of tilted dipoles loaded with artificial dielectrics, to achieve asymmetric radiation patterns. First, a simplified array element consisting of skewed stacked dipoles in the presence of a backing reflector is studied, by means of a dedicated spectral periodic method of moments (MoM). The analysis of the stacked dipoles provides guidelines to design arrays with certain radiation characteristics, by varying the tilt angle and the inter-element spacing. Based on the findings of numerical analysis, we then propose a tilted dipole element design with artificial dielectric loading to implement the pattern asymmetry. The design includes the feeding structure and the balun transition to a 50-Ohm coaxial line.