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A Wideband Dual Circularly-Polarized Antenna

A wideband dual circularly-polarized antenna is present by employing a directional printed cross dipole to realize broadband. A dual-ring 3dB hybrid is connected to the feed points on dipole by using two coaxial cables. The 3dB hybrid produces -90° or +90° phase difference between the X-polarized dipole and Y -polarized dipole, then the left circular polarization and the right circular polarization are achieved in the bandwidth of 50%. The proposed antenna is fabricated, the test results match well with the simulation results.