为了测量四瑞网络(其中也包括移相器)传输系数的相位,已研究出不少的方法。然而,这些主要用于厘米波段和更长波段的方法用来检验毫米波段和亚毫米波段短波部分的移相器时,误差将显著增大。这是由于上述波段的特点所造成,即测量电路微波元件内的损耗增大。例如,在改变所引入的相移过程中,移相器传输系数的模可能在1dB 的范围内改 In order to measure the phase of the transmission coefficient of the SIRUI network, which also includes the phase shifter, a number of methods have been developed. However, these methods, which are mainly used in the centimeter band and longer band, are used to test the phase shifter in the millimeter wave band and the short wave part in the sub-millimeter wave band, and the error will be significantly increased. This is due to the characteristics of the above-mentioned band, which means that the loss in the microwave element of the measuring circuit increases. For example, in changing the phase shift introduced, the modulo of the phase shifter transmission coefficient may be changed in the range of 1 dB