Design of mm-wave phased array in mobile terminal for 5G mobile system

In this paper, the study of the mm-Wave phased array in mobile terminal for the fifth generation (5G) mobile communication system is proposed. The design methodologies are presented based on the concept of coupled oscillator arrays, making the phased array without the need of conventional phase shifter and complex feeding network. The operating band of the proposed phased array is in 21 GHz–22 GHz, which is one of the candidate bands for 5G cellular. The design of tunable coupling networks can achieve the desired scanning beam by tuning the phase gradient states of adjacent oscillator elements. The overall array is low cost and low profile, which is suitable for 5G mobile system.