Experimental and theoretical investigations of folded-slot antennas for quasi-optical arrays

Folded slots are attractive for active arrays because of their broad bandwidth and simplicity. They have been used previously in a quasi-optical amplifier array. However, little is known about these antennas on thin substrates. The finite-difference time-domain (FDTD) method is applied to the analysis of CPW-fed folded-slot antennas. The paper compares the theoretical results and measured data and provides some design information for folded slots.