Patent ID: 6859047
Filing Date: 2005-02-22
Classification: G01R

Abstract:
1. An anechoic test chamber for testing an electromagnetic loss characteristic of a material specimen, comprising: a first conical section defining a first longitudinal axis and having an anechoic material covering an inside surface; a first antenna disposed within an end portion of the first conical section; a second conical section having a second longitudinal axis collinear with the first longitudinal axis such that first and second conical sections taper inwardly and away from each other along the longitudinal axis, the second conical section having an anechoic material covering an inside surface; a second antenna disposed within an end portion of the second conical section; and an aperture plate defining an aperture on the plate, the aperture plate being disposed between the first and second sections and having an electromagnetic impedance lower than that of the material specimen.