A low-profile high gain U slotted wide band micro-strip antenna for 5G applications

This work presents a parasitic wide band compact planar antenna for 5 G mm-wave applications. Besides having high bandwidth (5.22 GHz), the prospective antenna provides an enhanced gain of 5.23dBi which is achieved due to the reflector elements used in the design. The radiating element has a small planar rectangular geometry, with optimised dimensions of 0.342 lambda(0) x 0.199 lambda(0) x 0.005 lambda(0) at 28 GHz frequency of interest and has been designed and fabricated on a substrate of Rogers-RT/Duroid 5800 having a thickness of 0.147 lambda(0) with loss-tangent of 9 x 10(-4) and permittivity of 2.2. The proposed antenna operates in the frequency range of 24.71 to 29.93 GHz which falls under the n257 and n258 NR operating band of the FR2 band as defined by ITU for the millimetre wave 5 G spectrum. It is also affirmed in the study that the impedance bandwidth can be tuned by controlling the coupling gap between the radiating and parasitic patches. The measured results of the fabricated prototype of the patch are compared with the simulated results and the two results are in good agreement with each other. The pursuance of the proposed design in terms of gain, efficiency, radiation pattern, and wide bandwidth, qualifies the prototype as a viable option for mm-wave communication.