A micro-anechoic chamber for microwave inverse scattering imaging and measurement

Abstract

The invention discloses a miniature darkroom for microwave inverse scattering imaging and measuring. A closed or semi-closed darkroom is arranged around a scattering body and is composed of a double angle absorption artificial surface and a plurality of antennas; the double angle absorption artificial surface is composed of a plurality of wave absorption units; each wave absorption unit comprisesa grounded metal layer, two metal patterns, and an intermediate layer media panel; the metal patterns are located on the upper surface of the intermediate layer media panel; the intermediate layer media panel is located on the upper surface of the grounded metal layer; the metal patterns face inside, and the grounded metal layer faces outside; the antennas comprise a plurality of receiving antennas and a transmitting antenna; and the two metal patterns are configured according to the incidence angle between the position where the wave absorption units are located and the transmitting antenna,and the vertical incidence angle between the position where the wave absorption units are located and the scattering body. According to the miniature darkroom for microwave inverse scattering imagingand measuring, the invention can design and construct an imaging and measuring device with any desired scale, and the overall scale thereof can be as small as the wavelength level, thereby effectivelyreducing the inverse imaging problem and the ill-condition of measuring, and improving the quality of imaging and measurement.

Description

technical field [0001] The invention relates to a miniature electromagnetic wave darkroom, in particular to a miniature darkroom for microwave inverse scattering imaging and measurement. Background technique [0002] The electromagnetic inverse scattering imaging problem refers to the problem of solving information such as the position, shape, and material properties of the scatterer when the distribution of the incident field and the scattered field is known. Microwave imaging has the characteristics of safety, non-contact, and low cost, so it is widely used in military and civilian fields such as security inspection, partition monitoring, and medical imaging. Although the electromagnetic inverse scattering problem has a very wide application prospect, because the electromagnetic inverse scattering problem is an ill-conditioned nonlinear problem, its solution is very difficult. A big difficulty affecting its solution accuracy is the fast and accurate measurement of the amp...

AI Technical Summary

Problems solved by technology

However, if you want to use the above measurement devices to achieve better measurement results, the scattering of the external environment must be as small as possible, so the measurement area must be sufficiently open or the measurement device should be placed in a dark room for measurement, resulting in a large area occupied by the device and harsh experimental conditions. Good for use in fields such as biomedical imaging

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