A wideband bandstop FSS with tripole loop

In this paper, a microwave spatial band stop radome operating in x-band based on frequency selective surfaces (FSS) is presented. To meet the demand of wideband and large incident wave angle, a tripole loop FSS is designed as a multilayer sandwiched structure. The two FSS layers are developed to increase bandwidth of the stop band for the TE and TM mode wave. The simulation results show that the FSS has a wideband which up to 50% and 20% for TE and TM mode, respectively. A practical the FSS structure has also been fabricated and tested. Measurements indicate that the FSS has a band stop characteristics at large incident angle which range from 0° to 60° for TE and TM at X-band in the microwave anechoic chamber.