Research Article
Design of Active Frequency Selective Surface with Curved Composite Structures and Tunable Frequency Response
Table 3
Comparison between the proposed AFSS and related studies.
| Study | Technique | Bias circuit configuration | Operating freq. (GHz) | Stability | Polarization | Angle |
| [7] | PIN diode | Two-inductor bias | 2.5–5.0 | TE and TM | 0–45° | [8] | Varactor | Bias grid with inductive pad | 8.0–10.0 | TE | 0–45° | [9] | PIN diode | Two-inductor bias | 1.8–2.5 | TE | — | [10] | PIN diode | One parallel bias | 10.0–12.0 | TE | — | [11] | PIN diode | One series bias with 3 inductors, 1 resistor | 4.0–8.0 | TE | — | [12] | PIN diode | One parallel bias | 1.0–12.0 | TE | — | [13] | PIN diode | One series bias with 3 inductors | 1.5–8.0 | TE | 0–45° | This study | PIN diode | One parallel bias | 5.7–9.8 | TE and TM | 0–30° |
|
|