Table 3 Performance comparison of the proposed metamaterial inspired EGB structure with published works.
References | EBG configuration | No. of unit cells | Length (\({\lambda }_{g}\)) | Passband return-loss (dB) | Bandgap rejection (dB) | Roll-off (dB/GHz) | Bandgap (GHz)/Freq. range for S21 > 25 dB |
|---|---|---|---|---|---|---|---|
Tapered microstrip line | 4 | 2.28 | 20 | 30 | 105 | 0.44/(0.75–1.19 GHz) | |
Tapered EBG with DGS* | 3 | 0.67 | 13 | 32 | 10.9 | 6.0/(4–10 GHz) | |
Dumbbell-shaped DGS | 3 | 0.87 | 5 | 40 | 56 | 2.2/(5.6–7.8 GHz) | |
Sinusoidal tapered line | 6 | 1.69 | 3 | 47 | 87.5 | 6.0/(2.7–8.7 GHz) | |
Tapered dual plane EBG | 6 | 2.30 | 8 | 35 | 14 | 5.1/(7.3–12.4 GHz | |
Shorted patch structure | 8 | 1.34 | 3 | 40 | 235 | 1.9/(5.3–7.2 GHz) | |
This work | Metamaterial mushroom type EGB | 1 | 0.46 | 20 | 30 | 192 | > 18/(12–30 GHz) |
This work | Metamaterial mushroom type EGB | 5 | 1.77 | 30 | 95 | 192 | > 17.7/(12.3–30 GHz) |
