Effect of Loading a Horn Antenna with a Double Square Loop FSS "Filtenna System"

This article presents the analysis and investigation of the effect of loading a horn antenna with a double square loop frequency selective surface (FSS) of finite size. It is fabricated on Rogers RT5870 (lossy) of relative permittivity 2.33, thickness 1.575mm and loss tangent 0.0012. This structure is called a filtering antenna (filtenna). Basically it is applied for filtering and minimizing the interference and noise in the desired band. The filtration is carried out using a finite FSS of double square loop of overall dimensions 98x58 mm 2 . The structure is simulated using CST MWS and measured using network analyzer. There is a good agreement between the simulated and measured results.