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Table 5.
Half power beam width (HPBW) and efficiencies of Yebes 40 m radio telescope along the Q and W bands.
| Frequency | Wavelength | HPBW (a) | ηA | ηMB | ηF |
|---|---|---|---|---|---|
| (GHz) | (mm) | (″) | |||
| Q band | |||||
| 32.4 | 9.2 | 54.4 | 0.50 ± 0.05 | 0.60 ± 0.06 | 0.92 ± 0.03 |
| 34.6 | 8.6 | 50.9 | 0.48 ± 0.05 | 0.57 ± 0.06 | 0.92 ± 0.03 |
| 36.9 | 8.1 | 47.8 | 0.46 ± 0.05 | 0.54 ± 0.06 | 0.92 ± 0.03 |
| 39.2 | 7.6 | 45.0 | 0.44 ± 0.04 | 0.52 ± 0.06 | 0.92 ± 0.03 |
| 41.5 | 7.2 | 42.5 | 0.42 ± 0.05 | 0.51 ± 0.06 | 0.93 ± 0.03 |
| 43.8 | 6.8 | 40.2 | 0.40 ± 0.05 | 0.48 ± 0.06 | 0.93 ± 0.03 |
| 46.1 | 6.5 | 38.2 | 0.39 ± 0.06 | 0.47 ± 0.07 | 0.92 ± 0.03 |
| 48.4 | 6.2 | 36.4 | 0.36 ± 0.07 | 0.43 ± 0.08 | 0.91 ± 0.03 |
| W band | |||||
| 72.5 | 4.1 | 24.3 | 0.19 ± 0.01 | 0.23 ± 0.02 | 0.90 ± 0.03 |
| 74.7 | 4.0 | 23.6 | 0.18 ± 0.01 | 0.22 ± 0.02 | 0.89 ± 0.03 |
| 77.0 | 3.9 | 22.9 | 0.17 ± 0.01 | 0.21 ± 0.02 | 0.88 ± 0.03 |
| 79.3 | 3.8 | 22.2 | 0.15 ± 0.01 | 0.18 ± 0.02 | 0.88 ± 0.03 |
| 81.6 | 3.7 | 21.6 | 0.14 ± 0.01 | 0.17 ± 0.02 | 0.88 ± 0.03 |
| 83.9 | 3.6 | 21.0 | 0.13 ± 0.02 | 0.16 ± 0.03 | 0.88 ± 0.03 |
| 86.2 | 3.5 | 20.4 | 0.12 ± 0.02 | 0.14 ± 0.03 | 0.88 ± 0.03 |
| 88.5 | 3.4 | 19.9 | 0.11 ± 0.02 | 0.13 ± 0.03 | 0.88 ± 0.03 |
Notes.
(a)
The HPBW is estimated as 1.14 λ/D according to the PO simulations of the illumination (Sect. 2.3).
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