A triple band-reject frequency selective surface for broadband applications

Abstract

In this paper, a new FSS design as band-reject filter (BRF) has been proposed by means of periodic structures of frequency selective surfaces (FSS) which has been worked for triple-band frequencies. In the proposed design, a single-sided Teflon (PTFE) lossy substrate is incorporated with three elements that led to triple-band (2.45, 3.5 and 5.5 GHz) characteristics. The substrate of dimension of 0.293 λ × 0.293 λ at center frequency and having a dielectric constant of 2.1 has been used. Three patches are designed of different shapes. Element types FSS is used as a band-reject filter for broadband applications which have much greater bandwidth than its band-pass portion. Further, this paper introduced its simulated results and discussion that is realized in CST Microwave studio. The design is intended at the rejection of triple bands 2.45 GHz, 3.5 GHz, and 5.5 GHz which are for Bluetooth, WiMax, and WLAN, respectively.