A Bidirectional Pattern of DRA by Employing Cylindrical Spoof Surface Plasmon Polariton Structure

This paper presents a low profile bidirectional pattern cylindrical DRA antenna with single and double cylindrical spoof surface plasmon polariton (CSSPP) structures. The resonant structures are placed over a dielectric substrate. The omnidirectional pattern of cylindrical DRA in TE
01
δ
mode gets converted into a bidirectional pattern with the proximity placement of even mode resonating cylindrical SSPP structures. Moreover, the proposed antenna has single CSSPP, and double CSSPP resonator resonates at 2.4 GHz and 2.48 GHz, respec-tively. It exhibits a lower value of cross-polarization in the desired direction.