Table 5. Half power beam width (HPBW) and efficiencies of Yebes 40m radio telescope along the Q and W bands.

Frequency (GHz)	Wavelength (mm)	HPBW(a) (″)	η A	η MB	η F
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.).