Design of Miniaturized FSS with High Angular Stability Utilizing a Novel Closed Loop

Table 1

Comparison of the proposed miniaturized FSS with reported structures.

References	Resonant frequency	Material characters	Size of unit cell (λ0^2)	Thickness of FSS structure (λ0)	Angular stability (degree)	Miniaturization technique
[10]	1.66 GHz	FR-4, εr = 4.3	0.02 × 0.02	0.009	75	2.5-D structure made of square spirals
[13]	900 MHz	FR-4, εr = 4.3	0.021 × 0.021	0.005	80	2.5D closed loop
[14]	1.44 GHz	F4B, εr = 4.4	0.022 × 0.022	0.018	60	Handshake convoluted stripe
[16]	1.056 GHz	FR-4, εr = 4.3	0.034 × 0.034	0.006	75	Four-legged loaded loop elements
[18]	1.1 GHz	FR-4, εr = 4.4	0.022 × 0.022	0.006	60	Meandered lines
This work	850 MHz	FR-4, εr = 4.6	0.019 × 0.019	0.003	85	Novel 2.5D closed loop