Effect of Surface Error Distribution and Aberration on Electromagnetic Performance of a Reflector Antenna

Table 5

The result of effect of the normalized Seidel wavefront aberrations on EMP.

Seidel term	Loss (dB)		Offset (″)		ΔSLD (dB)				Aberration
	0 cut	90 cut	0 cut	90 cut	0 cut-L	0 cut-R	90 cut-L	90 cut-R
	0	-0.37	-95.2	0	-4.2	4	0.4	0.4	Tilt
	-0.19	-0.19	0	0	2.4	2.4	4.3	4.3	Focus
	-0.19	-0.19	0	0	7	7	0.6	0.6	Astigmatism
	-0.03	-0.25	-81.6	0	4.6	-7.4	-0.2	-0.2	Coma
	-0.23	-0.23	0	0	1.9	1.9	2.6	2.6	Spherical