A Broadband Full-Corporate-Fed Slot Array Antenna Based on the Single-Layer Substrate Integrated Waveguide

Abstract

A single-layer corporate-fed substrate integrated waveguide slot array antenna is newly proposed and verified. It is characterized by low profile, easy fabrication, low cost, low sidelobes, wideband operation, and high efficiency. A V-band 16 × 16-element array with uniform excitation is designed for demonstration. The radiating elements and feeding waveguides are arranged within a single-layer substrate, whose dielectric constant and loss tangent are appropriately selected. By adopting the full-corporate feed, the 16 × 16 radiating slots are excited by the 16 × 16 output ports of the feeding circuit, which is composed of cascaded H-plane T-junctions. For further bandwidth improvement, a metal grid plate is introduced on the top of the radiating slots. The test antenna is fabricated by the conventional PCB process. The measured bandwidth for |S 11 | < −10 dB is 16.2%, fully covering the 57-67 GHz frequency range. Meanwhile, the measured antenna gain higher than 30 dBi associated with the antenna efficiency higher than 45% is achieved over the 58−65 GHz frequency range.INDEX TERMS Slot array antenna, substrate integrated waveguide, single-layer structure, full corporate feed, broadband design.

Antenas y componentes de microondas para satélites de dimensiones reducidas utilizando tecnologías vacías integradas en substrato

“…Por ende, con el propósito de incrementar el ancho de banda de las ranuras, resulta imperativo considerar estructuras conformadas por cavidades, y/o contemplar redes de distribución que posibiliten la alimentación independiente de las ranuras. Algunas de estas propuestas se han presentado en SIW, así como en guías de onda, y otras tecnologías como se evidencia en [177][178][179]. No obstante, todas ellas presentan inconvenientes, ya sea en términos de reducción de la eficiencia o en cuanto a su voluminosidad.…”