Wideband Slot Array Antenna Fed by Gap Waveguide with Right-Handed Circular Polarization and High Gain

Table 1

Dimensions of the 2 × 2 cavity-backed slot subarray.

Component	Parameter	Value (mm)
Radiation layer	Slot spacing in the x- and y-direction	8.85
		3.26
		7.77
		5.88
		3.46
		0.62
Cavity layer		6
		6.66
		1.9
		6.43
		2.22
Feeding layer		2.22
		2.4
		3.1
		1.55
		2.22
		0.67