Improved Method for Embedded Object Detection and Reconstruction Through Near-Field Pulse Imaging Techniques

Abstract

Summary form only given. Near-field imaging offers certain advantages over other methods, specifically in data reconstruction. Because of its short ranges, the near-field experimental setup and antennas for measurements require very little space as compared to larger far-field distances for similar image reconstruction methods. In this paper we describe the application of a near-field, frequency-synthesized microwave pulse, for the detection, imaging and reconstruction of an embedded object. Specifically, we present an alternate detection technique, called single-probe detection and reconstruction (SPDR), which uses a single probe to reconstruct an object's shape and determine its location in two dimensions. The experimental setup of the near-field system consists of a rotating platform and a planar-scanning probe. This setup involves both cylindrical and planar scanning of the target and the processing of the reflected data collected at the single probe detection system. As compared to our previous techniques for which shape reconstruction was only possible when the object was placed at the center of the platform, this new technique provides reconstruction regardless of the location of the object. Once the data has been received and recorded, it is then processed for object reconstruction through time-domain analysis and an in-house developed code.