Beam Steering Performance Improvements Using a Layered Permittivity Dielectric

This paper presents simulated performance improvements utilizing a layered dielectric for a truncated tapered slotline array targeted in the 2-7 GHz frequency range. It will be shown that a dielectric loading may significantly improve the bandwidth and beam-steering characteristics of the antenna array. Furthermore, it will be demonstrated that a layered dielectric structure with different permittivities can further improve the performance compared to a homogeneous dielectric. Namely, the antenna with layered dielectrics display a further increase in bandwidth and wider beam steering angles in the H-plane.