Y. Yu, Cheng-Nan Chiu, Yih-Ping Chiou, Tzong-Lin Wu
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Suppression of end-fired emission for a miniaturized-element frequency-selective shielding surface with finite size using EBG
A special surface wave only exists on a finite-size frequency-selective surface (FSS), arrayed in a sub-wavelength periodic element. This surface wave induced by external incidence may cause strong end-fired emission and highly degrade the performance of the FSS applied as electromagnetic shielding especially along the end-fired direction. A hybrid design method for such a finite-size FSS with electromagnetic bandgap (EBG) structure is first-time proposed to significantly suppress the end-fired emission. Specifically, this suppression can even up to 15 dB in our design. For demonstration, a finite-size FSS utilizing a new miniaturized element is provided. A prototype of the FSS is created, modeled and tested. It reveals good consistency among models, full-wave simulation, and measured results.