BANDWIDTH AND GAIN PERFORMANCE OF REFLECTARRAY ANTENNAS FOR 5G COMMUNICATIONS: A REVIEW
DOI:
https://doi.org/10.11113/aej.v15.22408Keywords:
Bandwidth, Gain Performance , Reflectarray Antennas for 5G Communicati, A ReviewAbstract
The increasing necessity for quicker data rates in various applications is resulting in the development of future 5G/6G communication systems that possess a wider operating bandwidth. This requires the construction of appropriate antennas to meet specific parameters. Reflectarrays are being considered for 5G/6G systems because of its benefits such as because of its high gain, beam shaping, beam scanning, reconfigurability, and multi-beam capabilities. Reflectarrays are effective, although their narrowband nature has limited their use. This work comprehensively investigates the present condition of broadband reflectarrays. Wideband reflectarrays are evaluated and categorized according to four wideband phase tuning techniques. The bandwidth is analyzed and contrasted between a unit cell and reflectarray system, emphasizing the gain-bandwidth performance. Different wideband unit cell shapes are examined and categorized based on the method used for wideband phase adjustment. An analysis is conducted on how different wideband phase tuning methods affect the gain-bandwidth performance of reflectarrays. Factors taken into consideration include operating frequency, reflection phase range, substrate structure and material, aperture size, aperture efficiency (AE), focal distance, cross-polarization performance, gain, and side lobe levels. Comparisons are made between several phase tuning methods, and recommendations are given for creating reflectarrays with broad gain-bandwidth.
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