2x2 Circular Patch Antenna Array at 2.4 GHz for WSN Applications: Design and Performance Analysis of Circular Antenna Array and Comparison over Rectangular Array

The work is to design a 2×2 circular microstrip patch antenna array resonating at 2.4GHz and it is simulated for Wireless Sensor Network (WSN) applications by using HFSS tool. Circular patch antenna array is designed by depositing circular patches on FR-4 Epoxy substrate and is fed using microstrip feed lines. Fabricated antenna resonates at 2.391GHz. Antenna parameters such as Gain, return loss, Voltage Standing Wave Ratio (VSWR), Directivity, Reflection coefficient and radiation pattern are analyzed. 2×2 circular microstrip patch antenna produces more gain and less return loss compared to 2×2 rectangular microstrip patch antenna. The compact size and higher directivity compared to rectangular array makes it more relatively useful for WSN applications.