Bernard Jecko

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This article presents the recent developments on electromagnetic band gap (EBG) resonator antennas. After reminding the working principles of such radiating devices, a state of the art is presented to show main applications of these antennas including high directivity solutions, multiband devices, omnidirectionnal coverages, focal feeds for reflector and(More)
A mutual-synthesis approach is presented for the design of subsystems combining two microwave circuits. In this paper, we are focused on subsystems combining a filter and an antenna. In a first step, the methodology consists of synthesizing the global subsystem, which realizes both filtering and radiation functions, with respect to overall specifications.(More)
This work aims to study and design antennas for base stations with metallic electromagnetic band gap (EBG) materials. The objective was to make and study new concepts of EBG metallic antennas able to work according to a wide (or broad) radiation pattern form, i.e. presenting at least 60° angular beamwidth. The use of metallic structures offers a new(More)
This paper describes our contribution in the RNRT project called LUTECE, dedicated to the emergency localisation of cellular phones. This contribution takes place in the field of antennas, with the development of two biband systems : a directive array for the emission part, and a circular array of five elements with separated outputs for the receiving part.(More)
The intention of this paper is to present the instantaneous electromagnetic field measurement by signature of a neutral object (MICHELSON) method. The MICHELSON method is relatively new and enables the measurement of high-level electromagnetic fields from the utilization of a target. The incident field scattering on the target allows us to move the field(More)