Active FSS Design using Multi-Resonators

In this paper, a method to design active frequency selective surfaces (AFSS) with the bandpass response in the lower frequency bands is proposed. The designed AFSS on a low cost 0.8 mm thick FR-4 substrate is capable to tune from 1.3 GHz-3.4 GHz in the TE mode of the impinging electromagnetic wave. The step wise step design procedure and its equivalent circuit model with the tuning capability has also been developed whose response is in close agreement to the proposed AFSS. To prove its novelty a state of the art comparison is also presented. Interestingly, the AFSS also tuned in the upper frequency band in the range of 9-13 GHz which along with the effect of angle of incidence and the measured results would be presented during the conference.