Dual-band Millimeter-Wave Microstrip Patch Array Antenna for 5G Smartphones

In this paper, we present a low-profile design for dual-band microstrip patch antenna array that works at millimeter wave band with resonance frequencies of 28 GHz, 24.9 GHz and bandwidths of 0.9 GHz, 0.3 GHz respectively. The design was simulated by CST software, where the peak gain of 8.42 dBi is achieved using a small array antenna size of dimensions “9mm* 8mm* 0.64mm” [Length*Width* Height]; this model can be a promising candidate for future 5G smartphones. Two series of substrates materials have been investigated and RO3210 has been selected due to its good performance with this design.