Polycarbonate based flexible antennas for mmWave 5G devices

In this paper, low-cost polycarbonate substrate is used for design of antennas operating in the 28 GHz band. First, a corner bent inset fed patch antenna is proposed with a forward gain of 7 dBi and a front to back ratio of more than 18 dB indicating minimal radiation towards the user post-integration with the mobile terminal. In order to cater to the landscape mode: a corner bent tapered slot antenna is also proposed with a gain of 7 dBi. An overlapped architecture is investigated to demonstrate orthogonal pattern diversity with an effective radiating volume of 0.12 lambda(3)(0) and a port to port distance of 0.13 lambda at 28 GHz and mutual coupling of less than 27 dB without deterioration in the pattern integrity of the corresponding modes. A corner bent phased array is also illustrated operating at 28 GHz