Majumder, B.Vinnakota, S.S.Madhusudhan, R.Kandasamy, K.2026-02-0620232023 IEEE 11th Asia-Pacific Conference on Antennas and Propagation, APCAP 2023 - Proceedings, 2023, Vol., , p. -https://doi.org/10.1109/APCAP59480.2023.10469796https://idr.nitk.ac.in/handle/123456789/29268In this paper a beam switchable compact retro reflector is proposed based on the dielectric based metasurface structure and numerically verified. The core working principal of this device is lying on the principle of half shorted Luneburg lens designed using a dielectric glide symmetric structure in a parallel plate environment which redirects the electromagnetic ray towards the source but along the direction parallel and opposite to the incident direction. The proposed structure operates between 23 GHz and 25 GHz. The proposed antenna scans up-to maximum 60 degree (±30°) in the discrete angular space with a uniform gain and reduced scan loss at all its ports. The simulated gain dip is observed to be less than 2 dBi at a fixed frequency across all of its ports. © 2023 IEEE.dielectric metasurfaceglide symmetryHalf luneburg lens