Development of a Novel Three Dimensional Frequency Selective Surface Using Polyurethane Foam for Communication Bands

The focus of this paper is to develop a low cost, light weight three dimensional (3D) frequency selective surface (FSS) with reduced fabrication complexity over 2D FSSs and can be used in the communication field. Nowadays, 3D FSS is taking too much attention because it provides high degree of freedom in controlling transmission/reflection response. Therefore, in this paper, a 3D FSS has been attempted by inserting three concentric conductive cylindrical rings in to a polyurethane foam. The proposed concentric triple cylindrical ring 3D FSS aims to work as a band stop in the GSM-900, UMTS-1800 and LTE-2300 frequencies. CST software is used to simulate and optimize the dimensions of FSS. After that, measurement of developed concentric triple cylindrical ring 3D FSS is carried out in free space. Measurement results are in good agreement with simulation results. To shield the communication band in the secure places, this type of low cost structure may be quite useful.