Publications de Frédéric Bongard

Tunable radiator for small satellite application

Frédéric Bongard, Mikaël Krummen, Jean-Daniel Landis, Nevena Saponjic, Tomislav Debogovic, Pedro Robustillo Bayon

A tunable radiator for space application has been developed to meet stringent requirements in terms of electrical and environmental specifications but also low mass, simple manufacturing and low cost. The element is based on the folded PIFA antenna, with s ...

2016

Low-profile multi-function antenna system for small satellites

Juan Ramon Mosig, Frédéric Bongard, Ferdinando Tiezzi, Nevena Saponjic, Tomislav Debogovic, Pedro Robustillo Bayon

A low-profile multi-function antenna system suitable for small satellites is presented in this paper. The antenna system operates at UHF frequency band (400 MHz) and comprises eight miniaturised radiating elements (REs) based on a folded planar inverted-F ...

2016

A New Aperture for Switched-Beam Low-Profile Ku-Band Mobile Terminal Array Antennas

Stefano Vaccaro, Frédéric Bongard

This paper presents an innovative switched-beam architecture for a low-cost mobile-terminal antenna, suitable for linear-polarized satellite communications systems. This antenna concept can produce twelve adjacent sector beams that cover the full azimuth f ...

Ieee-Inst Electrical Electronics Engineers Inc2012

Transmission Line Based Metamaterials for Acoustic Waves

Juan Ramon Mosig, Frédéric Bongard, Hervé Lissek

We present our recent work on a one-dimensional acoustic negative refractive index metamaterial based on the concept of dual transmission line extensively investigated in microwave engineering. The proposed structure consists of an acoustic waveguide perio ...

2011

A Microfabricated 1-D Metamaterial Unit Cell Matched From DC to Millimeter-Waves

Frédéric Bongard, Julien Perruisseau-Carrier, Mihai Adrian Ionescu, Montserrat Fernandez-Bolanos Badia

A silicon-integrated one-dimensional CRLH-TL metamaterial unit cell is presented. Ultra broadband behavior is achieved by implementing the previously proposed 'lattice network' CRLH-TL unit cell in a monolayer host transmission line, as required for simple ...

Institution of Engineering and Technology2011

Multi-functional miniaturized slot antenna system for small satellites

Stefano Vaccaro, Juan Ramon Mosig, Frédéric Bongard, Anton Ivanov, Gabriele Rosati

2011

Acoustic transmission line metamaterial with negative/zero/positive refractive index

Juan Ramon Mosig, Frédéric Bongard, Hervé Lissek

A one-dimensional acoustic negative refractive index metamaterial based on the transmission line approach is presented. This structure implements the dual transmission line concept extensively investigated in microwave engineering. It consists of an acoust ...

2010

Contributions to the modeling and design of reconfigurable reflecting cells embedding discrete control elements

Juan Ramon Mosig, Frédéric Bongard, Julien Perruisseau-Carrier, Roberto Torres Sánchez, Ruzica Golubovic

This paper presents new contributions to the modeling and design of reflecting cells embedding discrete control elements such as microelectromechanical system (MEMS) or diodes. First, a rigorous assessment of the different possibilities to simulate and mea ...

Institute of Electrical and Electronics Engineers2010

Métamatériau Mécano-Acoustique basé sur le Concept de Ligne de Transmission Duale

Frédéric Bongard, Hervé Lissek

Les métamatériaux acoustiques sont des structures artificielles conçues pour réaliser des propriétés macroscopiques inédites dans la nature, telles qu’un indice de réfraction négatif. Parmi les différentes configurations permettant d’obtenir de telles prop ...

2010

Contribution to characterization techniques for practical metamaterials and microwave applications

Frédéric Bongard

Metamaterials (MTMs) are broadly defined as artificial composite materials specifically engineered to produce desired unusual electromagnetic properties not readily available in nature. The most interesting unusual property achievable with MTMs is probably ...

EPFL2009

Enhanced CRLH transmission line performances using a lattice network unit cell

Juan Ramon Mosig, Frédéric Bongard, Julien Perruisseau-Carrier

A novel topology for the composite right/left-handed transmission line (CRLH TL) is presented. This type of CRLH TLs has the advantage of exhibiting an all-pass behavior and a frequency-independent characteristic impedance, in the so-called balanced case. ...

Institution of Engineering and Technology2009

Experimental verification of broadband cloaking using a volumetric cloak composed of periodically stacked cylindrical transmission-line networks

Juan Ramon Mosig, Jean-François Zürcher, Frédéric Bongard

Cloaking using a volumetric structure composed of stacked two-dimensional transmission-line networks is verified with numerical simulations and measurements. The measurements are done in a waveguide, in which an array of metal cylinders is inserted causing ...

AIP American Institute of Physics2009

Enhanced periodic structure analysis based on a multiconductor transmission line model and application to metamaterials

Juan Ramon Mosig, Frédéric Bongard, Julien Perruisseau-Carrier

We propose to model periodic structures by equivalent multiconductor transmission lines (MTLs). The developed technique is based on a multimodal representation of the periodic structure unit cell, such as required for periodically loaded MTLs and periodica ...

Institute of Electrical and Electronics Engineers2009

Transmission-line lens antenna with embedded source

Juan Ramon Mosig, Frédéric Bongard

2009

Backward-wave slab with electrically tunable index of refraction

Juan Ramon Mosig, Frédéric Bongard

2009

Broadband cloaking of selected objects in the microwave regime with a volumetric cloak comprising layered networks of transmission lines

Juan Ramon Mosig, Jean-François Zürcher, Frédéric Bongard

2009

Frédéric Bongard

Graph Chatbot

Tunable radiator for small satellite application

Low-profile multi-function antenna system for small satellites

A New Aperture for Switched-Beam Low-Profile Ku-Band Mobile Terminal Array Antennas

Transmission Line Based Metamaterials for Acoustic Waves

A Microfabricated 1-D Metamaterial Unit Cell Matched From DC to Millimeter-Waves

Multi-functional miniaturized slot antenna system for small satellites

Acoustic transmission line metamaterial with negative/zero/positive refractive index

Contributions to the modeling and design of reconfigurable reflecting cells embedding discrete control elements

Métamatériau Mécano-Acoustique basé sur le Concept de Ligne de Transmission Duale

Contribution to characterization techniques for practical metamaterials and microwave applications

Enhanced CRLH transmission line performances using a lattice network unit cell

Experimental verification of broadband cloaking using a volumetric cloak composed of periodically stacked cylindrical transmission-line networks

Enhanced periodic structure analysis based on a multiconductor transmission line model and application to metamaterials

Transmission-line lens antenna with embedded source

Backward-wave slab with electrically tunable index of refraction

Broadband cloaking of selected objects in the microwave regime with a volumetric cloak comprising layered networks of transmission lines

Silicon-integrated fixed and reconfigurable CRLH unit cells based on lattice topology

A novel composite right/left handed unit cell and potential antenna applications

A novel composite right/left-handed unit cell based on a lattice topology: theory and applications

Bloch wave analysis for multimode periodic structures: applications to transmission line metamaterials