NUFFT-ACCELERATED PLANE-POLAR (ALSO PHASELESS) NEAR-FIELD/FAR-FIELD TRANSFORMATION

Range Multipath Reduction in Plane-polar Near-field Antenna Measurements

This paper details a recent advance that, for the first time, enables the Mathematical Absorber Reflection Suppression (MARS) technique to be successfully deployed to correct measurements taken using plane-polar near-field antenna test systems with reduced AUT-to-probe separation. This paper provides an overview of the measurement, transformation, and post-processing. Preliminary results of ran...

A Non-Invasive, Near-Field and Very Near-Field, Phaseless Antenna Characterization System

FGG-NUFFT-Based Method for Near-Field 3-D Imaging Using Millimeter Waves

In this paper, to deal with the concealed target detection problem, an accurate and efficient algorithm for near-field millimeter wave three-dimensional (3-D) imaging is proposed that uses a two-dimensional (2-D) plane antenna array. First, a two-dimensional fast Fourier transform (FFT) is performed on the scattered data along the antenna array plane. Then, a phase shift is performed to compens...

Near - Field to Nearmar - Field Transformation for Arbitrary Near - Field Geometry , Utilizing

A novel summation variation on the usual computation bymultiple reflections of the transient rqsponse for a realistically modeledpulse generator loaded with different kinds of loads is described. Thisconstitutes an alternative method for evaluation of the inverse Laplacetransform applicable for general lumped loads. As examples, we employthis approach to calculate the transi...

The Use of Statistical Image Classification as a Convergence Criteria in Phaseless Near-field Antenna Measurements

The utility of a variety of objective, quantitative and robust methods of assessing similarities between antenna measurement data have already been highlighted in the literature. These techniques essentially involved the extraction of interval, ordinal, and categorical features from antenna pattern data sets that can then be effectively compared to establish a measure of their adjacency, i.e. s...