Circularly Polarized Dual Frequency Hexagonal Microstrip Patch Antenna for X-band Applications
A low profile hexagonal microstrip patch antenna is proposed which operates in the X-band and resonates at 9.5GHz. It is observed to be linearly polarized with an axial ratio of 35.03dB. Without changing the feed mechanism, circular polarization is achieved along with dual frequency operation. By cutting a slot in the hexagonal patch which extends up to edge of the patch, the authors obtain the resonant frequencies at 9.05GHz and 10.05GHz. The axial ratio for this patch antenna is found to be 2.85dB. Since this value is below 3dB, the antenna is said to be circularly polarized.