Southwest Research Institute

Dorel Marius Necsoiu

Joseph N Mitchell

William Thomas Gressick

Brad David Moore

Emilio Martinez, Jr

Jason O Burkholder

A Van Atta antenna array comprising a number of antenna elements electrically connected to operate as a Van Atta antenna array and fabricated on and within a substrate. Each antenna element has a number of patch elements fabricated on the top surface of the substrate, with the patch elements being interconnected by substrate integrated waveguides. The antenna array provides a two-dimensional retro-reflective surface, which makes it especially suitable for InSAR monitoring of infrastructures.

Van Atta antenna array with patch elements and substrate integrated waveguide

A white light optical profilometer having a measurement head that is separated from the base unit by means of a fiber optic bundle. The measurement head contains a Michelson objective, whose reference path is folded so that the measurement head may be compact. The measurement head also contains a tilting mirror, which directs light from the surface of interest to the objective, and may be adjusted to allow the measurement head to scan complex surfaces. The base unit contains the other elements of the profilometer, such as an image detector and illuminator.

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San Antonio, TX, United States of America

Dorel Marius Necsoiu