Beam waist (in cm) as a function of frequency and aperture size, using Eq. (1). The shaded regions might be considered acceptable for this study. (Considering beam waists <= 3.0 cm for practical receivers).
| . | . | D (m) . | |||
|---|---|---|---|---|---|
| . | . | 1 . | 2 . | 3 . | 4 . |
| f (GHz) | 20 | 9.54 | 4.78 | 3.18 | 2.38 |
| 40 | 4.78 | 2.38 | 1.60 | 1.20 | |
| 60 | 3.18 | 1.60 | 1.06 | 0.80 | |
| 80 | 2.38 | 1.20 | 0.80 | 0.60 | |
| 100 | 1.90 | 0.96 | 0.62 | 0.48 | |
| . | . | D (m) . | |||
|---|---|---|---|---|---|
| . | . | 1 . | 2 . | 3 . | 4 . |
| f (GHz) | 20 | 9.54 | 4.78 | 3.18 | 2.38 |
| 40 | 4.78 | 2.38 | 1.60 | 1.20 | |
| 60 | 3.18 | 1.60 | 1.06 | 0.80 | |
| 80 | 2.38 | 1.20 | 0.80 | 0.60 | |
| 100 | 1.90 | 0.96 | 0.62 | 0.48 | |