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Application of ultrawideband centimeter-wavelength signals using recirculation of signals in spatial recirculation loops (emitter–target–element of the receiving antenna–emitter) is analyzed in the problem of localization of the position of a point object above a reflecting metal surface. Determination of the coordinates of object above a metal surface is based on the calculation of a generalized...
Holographic subsurface radar method is compared with the conventional technology of impulse radars. Basic relationships needed for the reconstruction of complex microwave holograms are presented. Possible applications of the proposed technology are discussed. Diagnostics of polyurethane foam coatings of spacecrafts is used as an example of the efficiency of holographic subsurface radars. Results of...
This paper discusses an new technique of breast microwave imaging based on combined use of video-tracker and subsurface radar. The feasibility study of the proposed method is done by both mathematical simulation and experiments. A back projection technique used for data processing proved to be reliable while reconstructing microwave images of a breast phantom with a dialectically contrast inclusion...
The idea of using the emerging augmented reality (AR) devices with scanning contact sensors is considered in this paper. This concept is illustrated by the experimental setup which includes a holographic subsurface radar as a contact sensor, web-camera, and personal computer. The data acquisition is accomplished by tracking the radar antenna tagged by an AR-marker. The radar image is updated periodically...
This paper describes the implementation of a holographic subsurface radar for sounding at shallow depths. The radar uses continuous signal with frequency switching and records phases of reflected signal at several operating frequencies. Two versions of the radar with frequency bandwidths 6.4–6.8 and 13.8–14.6 GHz were designed and tested. The data acquisition is accomplished by manual scanning along...
Breast cancer is one of the leading diseases among women nowadays. As a rule, the routine diagnostic procedure by common methods can not guarantee identification of aggressive tumors. Therefore, there is a need for a new method, which could detect the tumors at the earliest stage possible. This problem may be solved with the help of holographic radar, which detects dielectric inhomogeneities. It is...
Holographic subsurface radars (HSR) are not in common usage now; possibly because of the historical view amongst radar practitioners that high attenuation of electromagnetic waves in most media of interest will not allow sufficient depth of penetration. It is true that the fundamental physics of HSR prevent the possibility to change receiver amplification with time (i.e. depth) to adapt to lossy media...
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