Novel Implementation for a Cavity-Backed Slot Fed in Transmission Configuration

A novel radiating element proposed previously by the authors is alternatively implemented using enclosed microstrip configuration. The radiating element shows broad impedance bandwidth and unidirectional radiation pattern. Its transmission configuration makes it ideal for series-fed arrays. The new implementation presents significant improvements concerning easiness of fabrication, robustness and compatibility with other technologies. A prototype designed to work in the 6 GHz band has been fabricated and measured, and has shown the expected performance: a 50% of fractional impedance bandwidth and unidirectional, stable radiation patterns.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. Unión Europea: Horizonte 2020 (Marie Sklodowska-Curie nº706334) Ministerio de Educación, Cultura y Deporte (Formación Profesorado Universitario FPU15/06457) Ministerio de Economía y Competitividad (ADDMATE TEC2016-76070-CR3-3-R