Research Article
Compact Liquid Crystal Based Tunable Band-Stop Filter with an Ultra-Wide Stopband by Using Wave Interference Technique
Table 3
Comparison with recently reported LC based tunable BSFs.
| | Parameter | Ref. | | [16] | [20] | [21] | [22] | This work |
| | Dielectric anisotropy | 0.37307 | NA | NA | 1.4 | 0.8 | | (GHz) at | 3.845 | 4.45 | 3.4 | 2.225 | 4.434 | | Tunable range (GHz) | 0.29 | 0.4 | 0.35 | 0.275 | 0.38 | | Tunability (%) | 7.3 | 8.6 | 9.8 | 11.6 | 8.6 | | 3 dB bandwidth (GHz) | 3.135 | 1.15 | 1.25 | 1.5 | 4.86 | | 3 dB FBW (%) | 81.5 | 25.8 | 36.8 | 67.4 | 96.2 | | 25 dB bandwidth (GHz) | ~1 | 0 | 0 | ~0.7 | 2.51 | | Rejection level (dB) | <−41 | <−25 | <−20 | <−60 | <−45 |
|
|
