A Varactor-Tunable Rasorber Using Tripole and Ring Slot Elements

Table 2

Performance of the tunable FSR.

VC1 (pF); VC2 (pF)	0; 0.05	0.3; 0.28	0.68; 0.6
Passband_3 dB (GHz)	4.33–5.13	3.62–4.14	2.91–3.21
Insertion loss (dB)	0.52	0.32	0.3
Lower abs. band (GHz)	2.22–3.94	2.20–3.37	2.18–2.76
Higher abs. band (GHz)	5.54–7.96	4.48–6.94	3.46–6.41