A wideband circularly polarized (CP) antenna is presented to achieve enhanced impedance, axial ratio (AR), and gain bandwidths.\nThe antenna consists of two circular patches, a split-ring microstrip line with six probes, and a circular ground plane. By using\nthese six probes which are placed in sequence on the split-ring microstrip line, the operating bandwidth of the proposed antenna is\nincreased. The characteristic mode method is used to analyze different modes of the antenna and reveal the mechanism of\nextending the 3-dB AR bandwidth. Measured results show that the proposed antenna obtains an impedance bandwidth of...................
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