PROJECT TITLE :

Inductively-Coupled Miniaturized-Element Frequency Selective Surfaces With Narrowband, High-Order Bandpass Responses

ABSTRACT:

We introduce a new technique for planning miniaturized-part frequency selective surfaces (MEFSSs) with narrowband, bandpass responses of order. The proposed structure consists of two-dimensional periodic arrays of subwavelength inductive wire grids separated by dielectric substrates. A straightforward equivalent circuit model, composed of transmission line resonators coupled along with shunt inductors, is presented for this structure. Using this equivalent circuit model, an analytical synthesis procedure is developed that may be used to synthesize the MEFSS from its desired system-level performance indicators such as the middle frequency of operation and bandwidth. Using this synthesis procedure, a prototype of the proposed MEFSS with a second-order bandpass response, center frequency of twenty one GHz, and fractional bandwidth of 5% is intended, fabricated, and experimentally characterized. The measurement results make sure the theoretical predictions and the look procedure of the structure and demonstrate that the proposed MEFSS contains a stable frequency response with respect to the angle of incidence of the EM wave within the range for both TE and TM polarizations of incidence.