C
G
Last name: CLEMENTI
First name: G.
Master STIC Recherche, option Télécommunications RF et Micro-électronique
A novel Double Exponentially Tapered Slot Antenna (DETSA) for microwave imaging applications is presented. To extend the antenna's impedance bandwidth toward low frequency, an absorbing material is stacked on the antenna sides. The measured reflection coefficient (S11) of the antenna confirms that the absorbing material increases the bandwidth...
A novel Double Exponentially Tapered Slot Antenna (DETSA) for microwave imaging applications is presented. To extend the antenna's impedance bandwidth toward low frequency, an absorbing material is stacked on the antenna sides. The measured reflection coefficient (S11) of the antenna confirms that the absorbing material increases the bandwidth...
Radar often operate in severe weather conditions with large temperature variations. This paper presents return loss measurements and post-processing for the evaluation of temperature sensitivity of a resistively loaded radar antenna. The antenna is placed in a drying oven for controlling the temperature. A calibration technique based on an...
National audience
The presence nearby of a parallel metallic plane usually impairs the radio-electric performance of planar ultrawideband (UWB) elements such as monopole and slot antennas. Two comparative approaches to this problem are studied, in the frequency and time domains. Conservation of the UWB performance of a slot antenna is investigated in order to...
National audience
The presence nearby of a parallel metallic plane usually impairs the radio-electric performance of planar ultrawideband (UWB) elements such as monopole and slot antennas. Two comparative approaches to this problem are studied, in the frequency and time domains. Conservation of the UWB performance of a slot antenna is investigated in order to...
National audience
International audience
National audience
Radar often operate under severe heat conditions. The objective of this paper is to evaluate the temperature sensitivity of the return loss of an active antenna. The antenna is composed of 8 elements and its active switching circuit. It is shown that the overall antenna structure is weakly dependent on the temperature within the tested range...
On board systems are of growing interest for aerospace applications due to the increase of air traffic as well for civil as for military applications. Moreover, the spread out of drones leads to new security issues. On board systems requires not only detection capabilities but also a "sense and avoid" operation mode. This article describes the...
On board systems are of growing interest for aerospace applications due to the increase of air traffic as well for civil as for military applications. Moreover, the spread out of drones leads to new security issues. On board systems requires not only detection capabilities but also a "sense and avoid" operation mode. This article describes the...
A wideband antenna is developed for the mine detection application in the desert via on-board radar. The wideband matching is achieved with resistively loaded Vivaldi antenna. The final 128 elements antenna is split into 16 sub-arrays of 8 elements each driven by electronic switches for SAR imaging purpose. In a first step a sub-array has been...