On the Use of Subwavelength Radial Grooves to Support Spoof Surface-Plasmon-Polariton Waves Fernández Pantoja, Mario Alberto Hao Jiang, Zhi Werner, Pingjuan Werner, Douglas H. Microwave propagation Plasmons This letter introduces radial grooves as a feasi- ble geometry to support spoof surface-plasmon-polariton (SPP) waves propagating along a vacuum-metallic interface. Through the analytical derivation of a dispersion relation, validated also with full-wave simulations, the ability of radial grooves to operate in the fundamental mode at the microwave regime is demonstrated. Also, results demonstrate the utility of radial geometries to decrease the depth of the grooves, in comparison with the widely used rectangular grooves, thereby providing a superior methodology for generating spoof SPPs 2018-04-13T09:57:51Z 2018-04-13T09:57:51Z 2016 journal article Fernandez Pantoja, Mario; et. al. On the Use of Subwavelength Radial Grooves to Support Spoof Surface-Plasmon-Polariton Waves. IEEE microwave and wireless components letters, vol. 26, no. 11, pp. 861-863 november 2016 [http://hdl.handle.net/10481/50204] http://hdl.handle.net/10481/50204 10.1109/LMWC.2016.2614970 eng http://creativecommons.org/licenses/by-nc-nd/3.0/ open access Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License IEEE