Resonant Antenna Periodically Loaded with Series Capacitances for Enhanced Radiation Efficiency

A periodic series-capacitance loaded patch antenna for increased radiation efficiency at 250 GHz in on-chip environment is presented. The antenna is described as a periodic high pass transmission line. An exemplary candidate with increased efficiency is compared to a conventional patch antenna for broadside radiation. An essential part of this paper is an equivalent circuit model explaining the increased efficiency as well as the decreased bandwidth of the structure. A dispersion diagram analysis is motivated for the design process as well as for physical insight.