Browsing by Author "Vinnakota, S.S."

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Beam Switchable Compact Retroreflector Based on Dielectric Based Metasurface
(Institute of Electrical and Electronics Engineers Inc., 2023) Majumder, B.; Vinnakota, S.S.; Madhusudhan, R.; Kandasamy, K.
In 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 (Â±30Â°) 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. Â© 2023 IEEE.
Dielectric Metasurface Inspired Directional Multi-Port Luneburg Lens as a Medium for 5G Wireless Power Transfer - A Design Methodology
(Institute of Electrical and Electronics Engineers Inc., 2022) Majumder, B.; Vinnakota, S.S.; Upadhyay, S.; Kandasamy, K.
In this paper, a novel dielectric metasurface-inspired multi-beam directional Luneburg lens is proposed as a wireless power transfer medium at 5G mm-wave band. The lens is constructed using dielectric-based unit cells made up of a glide symmetric approach. It is connected with a set of microwave detector integrated multi-port tapered rectangular feeds to convert the received RF energy from different directions to DC power across a combined load. The proposed structure can be a potential candidate to harvest ambient energy from a wide coverage range of around 160° and produce a power conversion efficiency of about 76% for an input power of 14.9 dBm at 24 GHz. © 2009-2012 IEEE.
Dual Frequency Multi-Functional via-Less Leaky Wave Antenna Featuring Enhanced Frequency Sensitivity and Dual Beam Scanning Capability
(Institute of Electrical and Electronics Engineers Inc., 2024) Majumder, B.; Vinnakota, S.S.; Goud Rangula, M.; Kandasamy, K.
In this paper we present a dual band low cross-polarized periodic microstrip leaky wave antenna (LWA) based on the multi mode resonator concept (MMR). The structure is capable of frequency dependent backward dual-beam steering and fast forward beam scanning in the upper and lower operating band, respectively. A gap loaded microstrip line is used as a host transmission line to feed the combination of the periodic patch radiators on the top and the bottom etched slots leading to the generation of the forward and the backward space harmonics. The etched ring slots at the bottom surface of the structure are not only responsible for steering the beam in the backward direction in the bottom hemisphere in its upper band but also adds radiation diversity in the overall radiation mechanism in its two operating bands. The potential use of this antenna resides in its ability to produce in-plane fast forward beam steering suitable for autonomous vehicle navigation systems in its lower band and out-of-plane backward-symmetric dual beam steering in the upper operating bands, suitable for tracking in relay systems. © 2013 IEEE.