摘要
We propose to achieve a high-efficiency wideband flat focusing reflector using metasurfaces. To obtain the wide band,the polarization conversion mechanism is introduced into the reflector design, based on the fact that the reflection phases of cross-polarized waves are linear in quite a wide band. This facilitates the design of wideband parabolic reflection phase profile. As an example, we design two reflective focusing metasurfaces with one- and two-dimensional in-plane parabolic reflection phase profiles based on elliptical split ring resonators（ESRRs）. Both the simulation and experiment verify the wideband focusing performance in 10.0–22.0 GHz of the flat reflectors. Due to the wide operating band, such reflectors have important application values in communication, detection, measurement, imaging, etc.
We propose to achieve a high-efficiency wideband flat focusing reflector using metasurfaces. To obtain the wide band,the polarization conversion mechanism is introduced into the reflector design, based on the fact that the reflection phases of cross-polarized waves are linear in quite a wide band. This facilitates the design of wideband parabolic reflection phase profile. As an example, we design two reflective focusing metasurfaces with one- and two-dimensional in-plane parabolic reflection phase profiles based on elliptical split ring resonators（ESRRs）. Both the simulation and experiment verify the wideband focusing performance in 10.0–22.0 GHz of the flat reflectors. Due to the wide operating band, such reflectors have important application values in communication, detection, measurement, imaging, etc.
基金
Project supported by the National Natural Science Foundation of China(Grant Nos.61331005,11274389,and 11204378)
the Postdoctoral Science Foundation of China(Grant Nos.2013M532131 and 2014M552451)
the Foundation of the Author of National Excellent Doctoral Dissertation of China(Gran No.201242)
