Realization of Negative Group Delay Network Using Defected Microstrip Structure

Table 1

Performance comparison of proposed NGD networks with conventional.

	𝑓𝑜; (GHz)	GDmax; (ns)	S21max; (dB)	NGD; BW; (MHz)	NGD; BW; product	Return; loss; (dB)
[7]*	1.00	−2.30	1.680	X	X	−10
[9]*	0.310	−1.52	0.290	120	0.182	−15
[10]*	0.454	−1.52	0.300	103	0.156	−15
[3, 4, 11]	2.140	−9.00	−62.40	30	0.270	<−20
[12]	4.500	−0.05	−10.00	3000	0.150	X
[2]	3.505	−3.80	−37.16	80	0.304	X
This work	2.125	−8.20	−37.84	40	0.328	< −19

∗Active NGD network.