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

Improvement of stepped frequency continuous wave ground penetrating radar cross range resolution,

This paper presents some experimental results obtained with newly developed stepped-frequency continuous wave (SFCW) ground-penetrating radar in a frequency range from 400 to 4845 MHz. This paper describes the procedures to remove the delays within the transmitter, the receiver, and the antenna system and analyzes the experimental results obtained after processing the measured data. The measured system footprint and the experimental results show

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Superior Modes in High Permittivity Cylindrical Dielectric Resonator Antenna Excited by a Central Rectangular Slot

High permittivity materials allow good miniaturization of microwave components, but the dielectric resonator antenna using these materials has the drawback of a reduced bandwidth. To overcome this disadvantage we wanted to obtain a relatively wideband high permittivity DRA using the superior modes. Using HFSS simulations, we identified some of the superior modes that appear in cylindrical DRAs situated on a conductor ground plane and excited by a

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Performances of a stepped-frequency continuous-wave ground penetrating

Ground penetrating radars (GPRs) are used to detect surface laid or shallowly buried objects. They can work either in the time or frequency domains. This paper presents the performances of newly developed stepped frequency continuous wave ground penetrating radar operating from 400 MHz to 4845 MHz, to provide good penetration and high resolution, which works with parallel and sequential transmission. We show the advantage of using circularly polarized

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GPR Hardware – Stepped-frequency continuous-wave radar

The use of electromagnetic waves for subsurface sensing has enjoyed a lot of interest due to the three main advantages over the other types of sensors: no need of direct ground contact, the ability to detect metallic as well as non-metallic objects and the ability to make 3D imaging. Although the time domain systems are much easier to build there are some reasons to use frequency systems such as: wider dynamic range, higher mean power and, probably

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Smart antennas for wireless communications systems

The conference will be held at the Palace of National Military Center, one of the landmarks of Bucharest. TOPICS Signal Processing Natural Language and Speech Processing Image Processing Communications Theory Computational Intelligence Microwaves Antennas and Propagation Communications Networks and Systems Radio Communications Technologies Optical Communications Wireless Communications Satellite and Space Communications Multimedia Communications

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Tapered conductivity material for radar cross section reduction

Radar sensors are used for more and more applications from space surveillance, navigation, speed measurement, landmine detection, anticolision systems, space investigations etc. All these applications depend on the signal reflected from an object. The processing algorithms as well as the hardware available had been constantly improved such as today radars are able to detect objects with very small radar cross section (RCS). Nevertheless in the field

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Integration and interaction in the world of radar
Archimedean spiral antenna used for stepped frequency radar-footprint measurements
Radar Systems and SAR Imagery

Military Technical Academy organises a short course "Radar Systems and SAR Imagery" in cooperation with Delft University of Technology, The Netherlands, from 13 to 22 of May 2009 ( The course fee is 100 RON. Additional information prof. Ioan Nicolaescu

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