Hybrid Utilization of Loading Techniques and Cavity Groove for Performance Enhancement of the UWB (2–18 GHz) Spiral Antenna

Table 3

Dimensions of spiral antenna.

Parameter	Value (mm)	Parameter	Value (mm)	Parameter	Value (mm)	Parameter	Value (mm)
	50		1.575		0.8		7
	1		13.2		0.7		6
	3.6		6.5		1.5		0.8
	22.8		0.5	Air gap	1.8		1.5
	0.92		0.5	Groove	0.787		12.7