Wideband Circularly Polarized Antenna With Reconfigurable 2-Dimensional Axial Ratio Beamwidth

This paper proposes a wideband circularly polarized antenna with reconfigurable 2-dimensional axial ratio. For mobile satellite communication, the low profile CP wide ratio scanning and frequency bandwidth is essential. In this paper, we propose an controller. The deteriorates when difference between transverse modes (TM)01 TM10 gets larger. Therefore, in proposed antenna, controller used to compensate for by controlling amplitude phase of received signals. has three mode states region. simulation was below 3 dB region from -60° 60° at every azimuth angle 20% factional bandwidth. To verify controller, implemented 5.8 GHz. A noise amplifier (LNA) digital shifters are employed measured