Generation of High-Gain Steered Beam using Dipole Antenna Loaded on Anomalous Reflector with Near-field Correction

Dheeraj, G and Badadal, SS and Appajappa, M and Sarkar, D (2024) Generation of High-Gain Steered Beam using Dipole Antenna Loaded on Anomalous Reflector with Near-field Correction. In: IEEE Wireless Antenna and Microwave Symposium, WAMS 2024, 29 February 2024through 3 March 2024, Visakhapatnam.

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Abstract

In this paper, a binary coded anomalous reflector with near-field correction technique is proposed for generation of directive beam from a dipole antenna. The proposed anomalous reflector of dimension 10λ0 � 10λ0 operates at f=5.9GHz and is capable of simultaneously correcting for near-field effects, while characteristically bearing a phase gradient to steer the main beam towards a designed angle of 45°. First, the phase gradient for far-field incidence is computed using generalised Snell's law. Next, the phase gradient is modified accordingly to correct the near-field effects due to the radiator placed at λ0/4 above the anomalous reflector. The proposed anomalous reflector is designed on an FR-4 substrate. The primary radiator is a printed dipole with integrated balun matched to 50 Ω. The dipole is designed on RT Duroid substrate of thickness 0.508mm. The placement of dipole with anomalous reflector along two orientations is studied for Gain and HPBW, and is compared to a dipole with PEC bearing the same dimensions. The dipole is individually optimised with both the PEC and the anomalous reflector to achieve optimum S11 and impedance matching. For the anomalous reflector with dipole, a peak gain of 14.8 dBi is observed while consequently steering the beam at 45°. The proposed dipole backed with near-field corrected anomalous reflector can be employed in applications like Vehicle to Vehicle (V2V) or Vehicle to Everything (V2X) networks. © 2024 IEEE.

Item Type:	Conference Paper
Publication:	2024 IEEE Wireless Antenna and Microwave Symposium, WAMS 2024
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords:	Antenna reflectors; Automobile steering equipment; Radiators; Reflection; Steering, Anomalous reflector; Beam-steering; Coded metasurface; Intelligent reflective surface; Metasurface; Near field effect; Near fields; Phase gradient; Printed dipole; Reflective surfaces, Dipole antennas
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	12 Aug 2024 05:44
Last Modified:	12 Aug 2024 05:44
URI:	http://eprints.iisc.ac.in/id/eprint/85262

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