A new method to characterize absorber material in a free-space facility is
proposed. Materials are characterized in terms of both their specular refle
ction and creeping-wave performance, using a conducting cylinder as the ref
erence target. The difference in time delay bern een the specular and creep
ing wave allows the use of time-domain techniques to evaluate the performan
ce of the material (C) 1999 John Wiley & Sons, Inc.