High-gain circularly polarized pentagonal microstrip antenna for massive mimo base station

Abstract

— In this paper we propose a high-gain circularly polarized (CP) pentagonal microstrip antenna on a suspended substrate for Massive MIMO BS applications. The Massive MIMO is one of the key component to be incorporated in the 5G applications. The proposed antenna is successfully simulated using HFSS 13.0v, fabricated on a FR-4 substrate and measured. The proposed antenna exhibits a much higher gain of 6.17 dB, improved impedance bandwidth of 171.9 MHz (S11 =-10 dB), and axial ratio bandwidth (< 3 dB) of 135 MHz at 2.45 GHz (ISM band). The inter-element spacing of linear and planar antenna array for the Massive MIMO BS is confirmed using systemVue. Also, 2 × 2 MIMO antenna is simulated using HFSS. The measured and simulated results of the antenna are found in good agreement.