A novel polarization independent triple bandstop frequency selective surface for the mobile and wireless communication

In this paper, a novel and stable frequency selective surface has been proposed. The proposed design has incorporated a single sided FR-4 substrate with one square and two-crossed shaped loops which led to triple band reject (1.8 GHz, 2.5 GHz and 3.5 GHz) characteristics. The FR-4 substrate has a dielectric constant of 4.4 with loss tangent of 0.02 and dimension of 0.12 λ × 0.12 λ. The projected FSS design is polarization independent due to symmetrical structure. Therefore, it has produced a stable resonant frequency response at normal and oblique angles of incidences for both perpendicular TE and parallel TM wave modes. This stability of designed FSS has verified by its simulated results and realized in CST Microwave studio in frequency domain solver based on FDTD method. The transmission and reflection characteristics have analyzed at the selected band-stop/notch frequencies 1.8 GHz, 2.5 GHz and 3.5 GHz. More importantly, the proposed FSS is well suited to electromagnetic shielding in mobile and wireless indoor applications covering a wide spectrum with wider employability.