Table 2.

Comparison between the proposed Luneburg lens and relevant literature works.

Ref.	Center Frequency (GHz)	Material (εr)	Radius (λ)	Max. Scanning angle (°)	Max. Gain (dBi)
[32]	10	Pla+ (2.54)	1.5	-	16
[34]	31.75	FLGPCL02 (2.9)	2.54	±50	19–21
[35]	5.8	SPR6000B (2.8)	~2.15	±30	13.5
[38]	10	Verowhiteplus (2.8)	~2.5	±29	19.8
[41]	33	Metal	2.75	±45	18.3
[44]	26.75	FLGPCL02 (2.9)	2.15	-	12
This work	6	3300PA (2.54)	2.4	±72	22