Print Email Facebook Twitter Wideband, Wide-Scan Planar Array of Connected Slots Loaded With Artificial Dielectric Superstrates Title Wideband, Wide-Scan Planar Array of Connected Slots Loaded With Artificial Dielectric Superstrates Author Syed, W.H. (TU Delft Tera-Hertz Sensing) Cavallo, D. (TU Delft Tera-Hertz Sensing) Thippur Shivamurthy, H. (TU Delft Electronics) Neto, A. (TU Delft Tera-Hertz Sensing) Date 2016 Abstract Microwave broadband wide-scan antenna arrays are typically implemented resorting to vertical arrangements of printed circuit boards (PCBs). Here, we propose a planar solution realized with a single multi-layer PCB, with consequent reduction in cost and complexity of the array. It consists of an array of connected slots backed by a metallic reflector and loaded with superstrates. Artificial dielectric layers (ADLs) are used in place of real dielectrics to realize the superstrates, as they are characterized by very low surface-wave losses. For the unit-cell design, we developed an analysis tool based on closed-form expressions and thus requiring minimal computational resources. Finite-array simulations are also performed by generalizing the analysis method to account for the truncation effects. The presence of the ADL superstrate allows reducing the distance between the array plane and the backing reflector while maintaining good matching performance. A realistic feed structure is also proposed, which consists of a microstrip line connected to a coaxial feed. Such a solution does not require balanced-to-unbalanced transitions, which often limit the achievable bandwidth. The proposed structure achieves in simulations more than an octave bandwidth (6.5–14.5 GHz), within a scanning range of ±50 degrees in all azimuth planes. Subject wide-scan arrayArtificial dielectricconnected arrayswideband arrays To reference this document use: http://resolver.tudelft.nl/uuid:3fc0400b-60e2-47ae-aacc-36f873bd0cbb DOI https://doi.org/10.1109/TAP.2015.2507167 ISSN 0018-926X Source IEEE Transactions on Antennas and Propagation, 64 (2), 543-553 Part of collection Institutional Repository Document type journal article Rights © 2016 W.H. Syed, D. Cavallo, H. Thippur Shivamurthy, A. Neto Files PDF final.pdf 3.44 MB Close viewer /islandora/object/uuid:3fc0400b-60e2-47ae-aacc-36f873bd0cbb/datastream/OBJ/view