Deshpande, A. Y., M. Bhong, A. P. Raj, Y. B. Thakare, and K. P. Ray. “A Comprehensive Review on Frequency Reconfigurable Antennas for 4G, 5G and Sub-6 GHz Systems With Emerging Techniques”. Journal of Electronics and Electrical Engineering, vol. 5, no. 1, Apr. 2026, pp. 144-80, doi:10.37256/jeee.5120269368.