220.0               : freq GHz
840.0 0.0 99.4      : x,y,z antenna position in cm
6.0 6.0  0.0 0.0  0 : w0xt w0yt [beam waist (cm)] d0xt d0yt [beam waist distance (cm) from launch, d0>0 towards plasma] phiwr [orientation angle (deg), phiwr=0: horiz x-axis]