Design Analysis of Rectangular and Circular Microstrip Patch Antenna with coaxial feed at S-Band for wireless applications

The design of Rectangular Microstrip Antenna (RMSA) and Circular Microstrip Antenna (CMSA) with coaxial feed at S-band frequency is investigated in this paper. RMSA is equipped for 2.4 GHz resonant frequency operations and also CMSA for 2.4 GHz resonant frequency operations. How RMSA and CMSA operate at the same frequency are discussed. This choice of frequency has created the antenna an ideal alternative to be used within the wireless Local Area Network [WLAN] and WiMAX, wifi, and Zigbee applications. The dielectric material used for both MSAs is epoxy material FR-4 having a permittivity of 4.4. Both antennas are designed using HFSS and fabricated. In comparison to the CMSA VSWR 1.31, the RMSA has an improved value of 1.0 for the VSWR. CSMA has a Return Loss (RL) of -26.7dB and RSMA has a -31.4 dB return loss. The RMSA has shown a return loss of approximately 6.0 dB greater than the CMSA return loss.