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The growing demand for marine fisheries resources (95 million tons in 2006, a number that should increase by 2–3% globally each year, UNESCO 2007) as well as the global outlook in terms of population growth (in 2050 the world population is expected to reach 8.9 billion persons, UNFPA 2004) represents a real threat to the worlds fish stocks. This threat deals particularly, in short and medium terms,...
We present some recent progresses in the characterization of Ka-band radar return from water surfaces when observed at small incidence. We report on a radar experiment conducted at the large Pytheas wind-wave facility in Marseille and provide associated models. We consider the applicability of the results to natural oceanic and continental surfaces and show some specific properties of the sea clutter...
In this paper we present the final results of a project devoted to show the abilities of Time Reversal processing for Through-The-Wall (TTW) detection of human targets. From a multistatic-multiview UWB radar system, experimental data from realistic TTW scenarios are collected and rearranged to form the multistatic data matrix K. The results of the singular value decomposition of the K matrix are used...
This work presents a new RADAR prototype built for the purpose of imaging targets located in a cluttered environment. The system is capable of performing Phase Conjugation experiments in the ultrawideband GHz. In addition, applying the D.O.R.T. method to the inter-element matrix allows us to selectively focus onto targets, hence reducing the clutter contribution. The system has been validated by ph-syically...
This work presents a new RADAR prototype built for the purpose of imaging targets located in a cluttered environment. The system is capable of performing Phase Conjugation experiments in the ultrawideband [2-4] GHz. In addition, applying the D.O.R.T. method to the inter-element matrix allows us to selectively focus onto targets, hence reducing the clutter contribution. The system has been validated...
In the present work, we study potentialities of imaging targets using a new radar system. This Radar is able to perform phase conjugation experiments in the electromagnetic domain on the ultra-wide band [2 - 4] GHz. This way, time reversal experiments can be made, which can be useful for characterizing objects buried in cluttered environment.
This paper has clearly shown that a patch reduction is obtained by using periodic metallic patterns with strong local inductive effects. A greater reduction can be expected with stronger local capacitive effect (smaller gaps g). The main idea is to realize low-profile slow wave structures to reach the miniaturization constraints of some of the wireless applications. As expected, the efficiency drops...
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