Frequency Reconfigurable 5G Rectangular Patch Antenna

The antenna is one of the crucial parts of communication technology. Especially in 5G, where the frequency reconfigurable antenna is highly desirable because of its flexibility to change into a different frequency using some components like varactor diode, PIN diode, and RF MEMS to act as a switch. In this study, the microstrip antenna uses RT Duroid 5880 substrate and rectangular patch with a working frequency of 28 and 38 GHz. Varactor diode is used as a switch. The frequency reconfigurable antenna has to state which are ON and OFF where in ON state the working frequency only work at 38 GHz with return loss −20.538 dB while in the OFF state the working frequency is 28 and 38 GHz with a return loss of −21.99 dB and −16.497 dB. The proposed antenna was fabricated with substrate of 0.127 mm thickness and measured with network analyzer. The result of fabricated result compared with simulation result that presented in this paper.