Articolele autorului Ioan Nicolaescu
Link la profilul stiintific al lui Ioan Nicolaescu

System description of a stepped frequency CW radar for humanitarian demining
Some experience with the use of spiral antennas for a GPR for landmine detection
Stepped frequency continuous wave radar-data preprocessing
Simple and Collected Targets Radar Cross Section
Archimedean spiral antenna calibration procedures to increase the down range resolution of a SFCW radar

This paper deals with the calibration procedures of an Archimedean spiral antenna used for a stepped frequency continuous wave radar (SFCW), which works from 400 MHz to 4845 MHz. Two procedures are investigated, one based on an error-term flow graph for the frequency signal and the second based on a reference metallic plate located at a certain distance from the ground in order to identify the phase dispersion given by the antenna. In the second

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Experimental study of thinned array antennas by means of synthetic aperture radar measurements
Imaging of stepped frequency continuous wave GPR data using the Yule-Walker parametric method

Ground penetrating radar for humanitarian demining has a large bandwidth. It should discriminate small objects against a complex background. The stepped frequency continuous wave radar of IRCTR has a synthesized bandwidth of 4.5 GHz. Classical methods for generating an image of the subsurface include synthetic aperture processing for cross-range resolution and inverse Fourier transform to generate the range profile. This paper presents a novel scheme,

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Radar absorbing materials used for target camouflage

As a result of the developments within signal processing, transmitters and receivers areas radar technology has improved steadily over the past 50 years gaining in the sensor sensitivity, miniaturisation, power consumption, etc which allow to build smaller, more reliable and user friendly radar sensors. The effectiveness of these radar sensors is sufficiently threatening to merit the reduction of radar signature of all battlefield equipment. The

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Subsurface imaging using measured near-field antenna footprints

Images of the subsurface are made for the detection of land-mines using a bistatic steppedfrequency continuous-wave spiral-antenna system. While the system moves along the surface, the emitted electromagnetic wavefields are scattered by objects in the subsurface and cause changes in the voltages measured at the receiver. These changes are formulated as a convolution of a sensitivity function and a complex contrast function. Within the Born approximation,

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