Asymmetric truncated edge technique for circularly polarized array antenna at 2.6 GHz applications

It has been discovered that the asymmetrical elements´ length of upper and below truncated edges are the new parameter to fulfill the requirement of circular polarization (CP). The proposed antenna has a simple structure, consists of 2 × 2 patch antenna as its radiating elements and a single coaxial connector at the ground layer is used as a feed. The dimension of each patch antenna is 25.65 mm × 25.4 mm × 1.67 mm. Asymmetry truncated edge technique between upper and below patch is used and optimized to produce a circular polarization performance as well as high gain. This antenna is capable to produce a Right-Hand Circular Polarization (RHCP) with an axial ratio of 0.351 dB operated at 2.6 GHz frequency band. The presented antenna successfully reaches 7.510 dB of gain and -31.10 dB of reflection coefficient at the resonant frequency. The antenna design has a big potential for outdoor LTE application used as it improve the coverage robustness capability due to circular polarization characteristics.