Fig. 18.

Relative permittivity ${\mathrm{\epsilon }}_r^{\prime }$ of gallium arsenide measured by an X-band cavity [218]. Start, middle, and terminus refer to different specimens taken from the same boule. For these measurements the Type B expanded relative uncertainty at 10 GHz in ${\mathrm{\epsilon }}_r^{\prime }$ was U = ku_c = 0.02 (k = 2), where k is coverage factor.