Aperture synthesis uses interferometry technique to improve the limitations set by antenna physical aperture while working at lower frequency . phase and amplitude calibration of the visibility samples must be carried out to compensate for system bias before measurement 综合孔径技术利用了以小口径天线阵列合成大的观测口径的技术，解决了在较低频率时天线物理口径要足够大才能得到期望的空间分辨率的严重缺陷。
