M.E.C.’s model C390-394 is a corrugated horn antenna operating from 8 to 12 GHz.  The antenna consists of two input ports producing right-hand circular and left-hand circular polarization, respectively.  The corrugated horn design produces axially symmetric radiation patterns in all planes.  It also maintains a low axial-ratio at off-axis angles.  The antenna is capable of handling 400 watts CW or 1 kW peak power.