Research / 2019 / Article / Fig 4

Research Article

Spiral Field Generation in Smith-Purcell Radiation by Helical Metagratings

Figure 4

Designer TM01 mode transducer and S-parameters. (a) Schematic of a monocone antenna transducer. (b) Field pattern of the TM01 mode in the circular waveguide. (c) Simulated and measured S-parameters.