Bandwidth Behavior of Closely Spaced Aperture-Coupled Reflectarrays

Table 5

Designed reflectarrays features. (operating frequency 𝑓₀ = 20 GHz; 𝐹/𝐷 ratio = 1).

Reflectarray configuration	𝐷	Δx	Patch substrate	Δtg(α) (∘/GHz)	1-dB gain; bandwidth
1	12.6λ 0	0.6λ 0	𝜀𝑟1 = 2.33	−125	6.7%
			𝑡 = 0.762 mm
2	12.4λ 0	0.4λ 0	𝜀𝑟1 = 2.33	−53	17%
			𝑡 = 0.762 mm
3	12λ 0	0.48λ 0	𝜀𝑟1 = 1.07	−37	23%
			𝑡 =1 mm