Scanning Microwave Near-Field Microscope Based on the Multiport Technology

A multiport based near field high frequency microscope is proposed for local nondestructive evaluation and testing applications. The combination of the multiport technology and near-field microscopy methods present advantages such as low cost, compactness, real-time operation, high spatial resolution and versatility. In particular, experimental demonstrations of a multiport near-field microscope is described in microwave frequency range. The spatial resolution of the instrument is experimentally verified to evaluate the performance of the technique proposed.