An EIRP Measurement Method of High-Power Microwave Systems Based on Near-Field Testing

Table 1

S₂₁ changes with the width of the ring groove.

	Ring width (mm)
	0	25	50	100
D (dBi)	51.77	51.60	51.42	51.06
ΔD (dB)	0	−0.17	−0.35	−0.71
S21 (dB)	−8.63	−8.84	−9.06	−9.52
ΔS21 (dB)	0	−0.21	−0.43	−0.89
(dB)	0	0.04	0.08	0.18