Near-field measurement and far-field characterization of antennas in microwave, millimeter-wave and THz wave band based on photonics

We show antenna far-field characterization using photonics-based near-field visualization system. The photonics technology enables near-field visualization in the range from 1 GHz to at least 600 GHz with the same system configuration. As an example, antenna characterization at 300 GHz band based on planar and cylindrical scanning will be discussed.