Reducing Subcarriers Beam-Squinting of Ultra-Wideband Mobile Communication Systems using Phased Array Antennas 
K. Rama Devi1, M. Nani2
1Dr. K. Rama Devi*, Assistant Professor, Department of Electronics and Communication Engineering, Jawaharlal Nehru Technological University, Kakinada, (Andhra Pradesh). India.
2M. Nani, Student, M. Tech, Jawaharlal Nehru Technological University, Kakinada, (Andhra Pradesh). India.
Manuscript received on November 16, 2021. | Revised Manuscript received on November 22, 2021. | Manuscript published on November 30, 2021. | PP: 213-217 | Volume-10 Issue-4, November 2021. | Retrieval Number: 100.1/ijrte.D66191110421 | DOI: 10.35940/ijrte.D6619.1110421
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Abstract: There has been increasing demand for accessible radio spectrum with the rapid development of mobile wireless devices and applications. For example, a GHz of spectrum is needed for fifth-generation (5G) cellular communication, but the avail- able spectrum below 6 GHz cannot meet such requirements. Fortunately, spectrum at higher frequencies, in particular, millimeter-wave bands, can be utilized through phased-array analog beamforming to provide access to large amounts of spectrum. However, the gain provided by a phased array is frequency dependent in the wideband system, an effect called beam squint. We examine the nature of beam squint and develop convenient models with a uniform linear array. To further simplify the evaluation of the system performance, an approximated closed-form expression for the array gain is derived. Furthermore, to evaluate the performance of the proposed design, rigorous numerical results concerning different system parameters are provided in this paper.
Keywords: Beam-squinting, Analog architecture, Millimeter wave, Wideband, Array gain, Capacity.