Compact Frequency Selective Surface (FSS) for X-Band Shielding

Abstract

With the increase in the usage of electromagnetic devices, electromagnetic interference increased many folds. Frequency Selective Surface (FSS) provide effective shielding from unwanted frequency ranges. A thin, conformal band-stop FSS is presented in this research that provides effective electromagnetic shielding properties in X-band. The FSS acts as a band stop filter at 10 GHz. The proposed FSS has 54.7% fractional bandwidth. The design is of the dimensions 6.79 x 6.79 x 0.127 milimeter cube, employing Rogers RT 5880 substrate with 0.0009 dielectric constant. It has an attenuation of at least -57.97 dB. The proposed FSS shows oblique incidence angle independence for both TE and TM modes, up to 60o scan angle. The incidence angle independence makes the FSS response stable for both normal and varying angles of the incident waves. The design has a copper cladding of 0.018 mm, making the overall FSS thickness of 0.145 mm. The thin substrate makes the design flexible and easily bendable for curved surfaces. Its thin structure makes it easily applicable on buildings, vehicles and military aircrafts for electromagnetic shielding purposes. The conformability and shielding properties make the design suitable for various other applications.

An ultra‐thin frequency‐selective surface with inductive loading for X‐band shielding applications

“…The proposed FSS unit cell is 83% smaller than the double‐sided solution in Zouaoui et al 13 The proposed FSS offers good attenuation characteristics and the realized rejection bandwidth is 40% calculated at |S 21 | ≤ −15 dB. The realized bandwidth is greater than the research works reported in other studies 8–17 . The rejection bandwidth is 48% for Nauman et al 9 calculated with |S 21 | ≤ −3 dB.…”

“…13,18 2. The proposed FSS has higher flexibility compared to those in other studies, [8][9][10][11][12][13][14][15][16][17] and the profile thickness is at least 52% thinner than the solutions presented in the literature. 3.…”

“…From the table, the following inferences are made: The proposed X‐band FSS is a single‐layer uniplanar solution as compared to many other dual‐layer solutions 13,18 The proposed FSS has higher flexibility compared to those in other studies, 8–17 and the profile thickness is at least 52% thinner than the solutions presented in the literature. The FSS unit cell offers good miniaturization. The computed miniaturization is 45% and more in comparison with the references.…”

“…The realized bandwidth is greater than the research works reported in other studies. [8][9][10][11][12][13][14][15][16][17] The rejection bandwidth is 48% for Nauman et al 9 calculated with jS 21 j ≤ À3 dB. Though Kanchana et al 8 offers a comparable bandwidth, the work is limited by conformal property.…”

“…The proposed FSS offers a peak attenuation of 37 dB with angular independence up to 45°. Yet another interesting FSS developed on a 0.127 mm thick Rogers material is described in Khalil et al 11 with a unit cell size of 6.8 × 6.8 mm. X‐shaped metallic loops with a copper thickness of 18 μm are used in the development of the flexible FSS.…”