Resonant transmission of microwaves is demonstrated through subwavelength holes on a semicircular radiator. Split ring resonators, offering a perfect control of the emitting apertures, are applied to determine the radiation direction and the resonant frequency. Full wave simulation shows that our design is capable of achieving wide angular scanning beams without causing any other main lobe, and the steerable beams could be easily controlled through tuning the excitation frequency.
© 2014 Optical Society of America
Diffraction and Gratings
Original Manuscript: February 17, 2014
Manuscript Accepted: April 25, 2014
Published: June 5, 2014
Rui Yang, Jiawei Zhang, and Hui Wang, "Frequency scanning from subwavelength aperture array," Opt. Lett. 39, 3461-3463 (2014)