Active Unit Cell with Continuous Transmission Phase for a Radome-Periodic Structure in S-band

This work presents the methodology of design and the characteristics of an active, three layer unit cell embedded in a radome. The structure covers a phase range of 330° with a transmission magnitude better than −3 dB. The design of the proposed active unit cell utilizes 2-port network theory to estimate the port impedance of each layer and the transmission coefficient of the complete structure.