Sub-Terahertz MSL and CPW rectenna using 303 GHz 300 kW-class Gyrotron

Sub-Terahertz 303 GHz rectenna was developed by the photolithography process and measured using a 300 kW-class Gyrotron. As a result, the maximum output power and rectenna power density for the microstrip line (MSL) and coplanar waveguide (CPW) were 17.1 mW, 3.43 kW/m
²
, and 14.5 mW, 4.87 kW/m
²
, respectively. The RF-DC conversion efficiency was obtained 2.17 % with 342 mW input power and 130 Ω DC load. The results reveal the highest operation frequency except the photovoltaic converter.