Analysis of LHCP and RHCP for Microstrip Patch Antenna

Abstract

LHCP and RHCP analysis of microstrip patch antenna at 5.2 GHz has been discussed in this work. A linearly polarized coaxial fed microstrip patch antenna has been modeled in ANSYS HFSS. To analyze the Left Hand Circular Polarization(LHCP) and Right Hand Circular Polarization (RHCP) Patch structure is modified respectively. To differentiate between LHCP and RHCP Field analysis and Gain analysis has been done. All the three microstrip patch antennas modeled on 1.6 mm thick FR4 substrate with the Dielectric constant 4.4. For the designed microstrip patch antennas return loss, gain and axial ratio observed. For linearly polarized microstrip patch antenna axial ratio is 63dB and for circularly polarized microstrip patch antenna axial ratio less than 2dB observed. For LHCP microstrip patch antenna LHCP Gain approximately 20dB greater than RHCP Gain and for RHCP microstrip patch antenna RHCP Gain approximately 20dB greater than LHCP Gain is observed. Fabrication of linearly polarized antenna and LHCP antenna has done. measured return loss and VSWR results compared with the simulated antenna results.