(英) |
The gain of pyramidal horn antenna above 110 GHz used on millimeter-wave bands is determined using the three-antenna method, and the uncertainty of measurement is estimated. The gain reduction due to measurement distance is evaluated experimentally, and the results show that by considering the phase center, accurate gain measurement can be performed at a reduced distance. For gain measurements, uncertainties of 0.14 dB are available for the D-band (110-170 GHz) horn. |