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Comparison of the power uncertainty
| Coupling factor (dB) | Return loss (dB) | Isolation (dB) | Directivity (dB) | Max power uncertainty* (%) | |||
|---|---|---|---|---|---|---|---|
| Forward | Reflected | ||||||
| Conventional coupler | 25 | 25 | 45 | 25 | 3.9 | 35 | |
| High directivity coupler | 7 T | 24.8 | 39 | 87.3 | 62.5 | 0.05 | 0.43 |
| 9.4 T | 26 | 35.9 | 88 | 62 | 0.06 | 0.46 | |
| 10.5 T | 25 | 34.8 | 90.4 | 65.5 | 0.04 | 0.31 | |
Maximum reflected power uncertainty with VSWR = 2 at port 3
