A Compact Rectangular Loop Antenna for 5G mmWave Application

The design and analysis of a compact rectangular loop antenna is presented. An application device requires an antenna with the desired radiation pattern to achieve the higher gain. However, when circuit elements for various functions are put in a small space, the radiation pattern is distorted due to the radiation leakage from the side lobe. The radiation-induced parasitic leakage path can cause loss in signal levels. We design the loop antenna to avoid the radiation leakage by adding the bypass current path. The proposed antenna can be used as a 5G mmWave application that receives a small quantity of electromagnetic wave while reducing the radiation leakage on the ground.