A $2 \times 2$ Inset Feed Circular Patch Antenna Array for 1.8GHz LTE Application

This paper presents the design and characterization of 2×2 circular patch antenna array for 1.8GHz Long Term Evolution (LTE) application. The antenna array consists of 4 circular patches designed on a 1.6mm thick FR4 epoxy dielectric substrate with relative permittivity (ε_r) of 4.2. An inset feed method is applied to feed each circular patch to improve overall performance of the antenna array. The physical parameter of proposed antenna array is analyzed through simulation to obtain the optimum performance satisfying the requirement of application. The experimental characterization is conducted for the realized antenna array to be compared with the simulation. It shows that realized antenna array resonates at the frequency of 1.8GHz with the gain of 6.36dBi in which this is agreed well with the simulation result.