A Novel CP Horn Antenna with Switchable Polarization by Single Port Feeding

Table 1

Four shapes of inner reflective surface in Figure 2.

Type	Rectangle	Triangle	Trapezium	Semicircle
3 dB-AR bandwidth	10.3%	11.8%	14%	15.8%
3 dB-AR beamwidth; 4.65 GHz	82°	83°	86°	96°