Table 1 Comparison of the correlated RIS for beam steering
Ref. | Freq. (GHz) | RIS type | Element lossa (dB) | Tuning method | Scanning range | Max modulation freq. (MHz) |
|---|---|---|---|---|---|---|
23.5 | Reflect (Space-Time coding) | 3.8 | PIN-diode | ±45° | 1.8 | |
73 | Reflect (Space coding) | 6.2 | PIN-diode | ±70° | N/A | |
97 | Transmit (Space coding) | 11 | PIN-diode | 30° | N/A | |
98 | Reflect (Space coding) | 9 | liquid crystal | 35° | N/A | |
100 | Reflect (Space coding) | 8 | liquid crystal | ±20° | N/A | |
300 | Transmit (Space coding) | 5 | CMOS | ±30° | N/A | |
This Work | 100 | Transmit (Space coding) | 2.8 | Schottky diode | ±60° | 100 |
