A Wideband Feed Network for Vivaldi Antenna Arrays

Table 2

Dimensions for the wideband Vivaldi antenna element.

Symbol	Description	Value (mm)
Dc	Diameter of circular slot stub	10.78
He	Width of Vivaldi aperture	82
Lfe	Length of Vivaldi taper	158.76
R	Vivaldi taper rate	15e − 3
substrate_L	Substrate length	209.76
substrate_W	Substrate width	135
Wmt	Width of the microstrip line at the port	3.53
Wmt1	Width of the microstrip line at the transition	1.22
WsL	Width of slotline	0.6