Design of a Compact Passband Frequency Selective Surface with Stable Resonance

Table 1

Comparison of proposed FSS with other FSS in the literature.

Number of metallic layers	Unit cell size	Parameters (, )	Operating band
Dual [6]	2.208λ0  ×  2.208λ0	3.4, 0.5 mm	Single
Dual [7]	0.104λ0  ×  0.104λ0	4.4, 1.6 mm	Single
Dual [8]	0.081λ0  ×  0.081λ0	2.65, 1.5 mm	Single
Dual [9]	0.062λ0  ×  0.062λ0	3.66, 0.254 mm	Single
Single [10]	0.172λ0  ×  0.172λ0	4.3, 1.6 mm	Single
Single [11]	0.095λ0  ×  0.095λ0	4.3, 1.6 mm	Single
Dual [12]	0.061λ0  ×  0.061λ0	2.65, 1 mm	Dual
Single [13]	0.088λ0  ×  0.088λ0	4.3, 1.6 mm	Dual
Single [14]	0.065λ0  ×  0.076λ0	2.65, 1.5 mm	Dual
Structure proposed	0.066λ0  ×  0.066λ0	4.3, 1.6 mm	Single

and are the permittivity and thickness of the substrate.