A High Gain Array Antenna for 28 GHz Upper 5G Application

In wireless communication, the use of microstrip patch antennas (MPAs) are expanding day by day because of its low-cost and low-profile characteristics. In this paper, a high gain $1\times 2$ rectangular-shaped microstrip patch array antenna (RMPAA) is proposed. The volume of the patch array antenna is $30\ \text{mm} \times 20\ \text{mm} \times 1.575\ \text{mm}$. For the modelling of the designed RMPAA, Rogers RT 5880 dielectric material is used with permittivity of 2.2 and tangent loss 0.0009. The frequency coverage of the antenna is from 24.722 GHz to 30.171 GHz which is smooth enough for 28 GHz 5G application. The centre operating frequency of the RMPAA is 26.72 GHz with reflection coefficient of −30.747 dB. The gain of the patch array antenna is 10.98 dB with directivity of 12.30 dBi and maximum radiation efficiency of 81%. The VSWR of the antenna satisfies $1 < \text{VSWR} < 2$. For designing and optimizing, 3D EM simulator CST microwave studio is used.