Searched for: mods_originInfo_dateIssued_s:"2007"
(1 - 19 of 19)
document
Bruni, S. (author), Neto, A. (author), Gerini, G. (author), Bekers, D.J. (author), TNO Defensie en Veiligheid (author)
This paper proposes a novel imaging architecture suited for use in the mm and the sub-mm wave regimes. The structure is composed by a one dimensional array of radiators in order to enhance the image acquisition time with respect to single element detection. Moreover each of the antenna elements composing the array is characterized by a...
conference paper 2007
document
Gerini, G. (author), Hulzinga, A. (author), Bekers, D.J. (author), van der Houwen, E.H. (author), Schippers, H. (author), Creemers, R.J.C. (author), Bron, E. (author), TNO Defensie en Veiligheid (author)
conference paper 2007
document
Maci, S. (author), Lindmark, B. (author), Freni, A. (author), Breinbjerg, O. (author), Raisanen, A. (author), Laheurte, J.-M. (author), Mahdjoubi, K. (author), Frezza, F. (author), Vecchi, G. (author), Jofre, L. (author), Perez, M.S. (author), Ferrando, M. (author), Kildal, P.S. (author), Skrivervik, A. (author), Gerini, G. (author), Dubard, J.L. (author), Casali, B. (author), Manteuffel, D. (author), Bucciu, O. (author), Wiesbeck, W. (author), Mazanek, M. (author), Sipus, Z. (author), Hall, P. (author), Ibars, C. (author), TNO Defensie en Veiligheid (author)
The European School of Antennas (ESoA) is a new model of geographically-distributed school that has the objective to reinforce the European training and research in antennas and relevant applications. This paper presents the objective and perspectives of ESoA and the results obtained in 2006 and the first part of 2007 in terms of flow of...
conference paper 2007
document
Bekers, D.J. (author), Monni, S. (author), van den Berg, S.M. (author), van de Water, A.M. (author), Morsink, B.J. (author), Alboin, C. (author), Ducros, V. (author), Celikbas, M. (author), Blanche, J. (author), Fiscante, N. (author), Gerini, G. (author), Martinaud, J.P. (author), Rochette, M. (author), van Werkhoven, G.H.C. (author), TNO Defensie en Veiligheid (author)
In this paper, we introduce a general framework to efficiently optimize phased array antennas integrated with Frequency Selective Surfaces (FSS) and feeding elements. The framework consists of two main parts: the first being parametric models that enable fast evaluation of the full-wave problem for a range of frequency, scan angle and geometry...
conference paper 2007
document
Neto, A. (author), Llombart, N. (author), Gerini, G. (author), Bonnedal, M. (author), de Maagt, P. (author), TNO Defensie en Veiligheid (author)
The design strategy that uses dielectric super-layers with neighboring wave-guides closed in matched loads constitutes a worst case scenario as far as the performance enhancement is concerned and finds applicability in radiometric imaging arrays. On the other side the design strategy that uses dielectric super-layers with neighboring wave-guides...
conference paper 2007
document
Albani, M. (author), Balling, P. (author), Ettorre, M. (author), Gerini, G. (author), Maci, S. (author), Pontoppidan, K. (author), Sipus, Z. (author), Sjöberg, D. (author), Vecchi, G. (author), Vipiana, F. (author), TNO Defensie en Veiligheid (author)
The topic of this paper is the work carried out in Work Package 2.3-2 of the EU network ACE. This work package is concerned with the modelling of the surfaces of modern reflector antennas. In particular the problems associated with homogenisation of periodic structures are described together with an application example. An accurate MoM solutions...
conference paper 2007
document
Ettorre, M. (author), Bruni, S. (author), Gerini, G. (author), Neto, A. (author), Llombart, N. (author), Maci, S. (author), TNO Defensie en Veiligheid (author)
This work proposes a new topology of antenna based on the use of Planar Circular Symmetric EBG with different periodicities. These periodicities are used to impose different propagation velocities of the dominant surface waves on different zones of the same dielectric substrate. The control of the dispersion characteristics guides the design...
conference paper 2007
document
Gerini, G. (author), de Maagt, P. (author), Bonnedal, M. (author), Llombart, N. (author), Neto, A. (author), TNO Defensie en Veiligheid (author)
The performances of focal plane arrays that implement multibeam coverage from a single reflector antenna are usually reduced by conflicting requirements on the feed elements. Dense packing is required to minimize the beam separation, while typically large apertures provide the high feed directivity which in turn translates in low spill over...
conference paper 2007
document
Neto, A. (author), Gerini, G. (author), LLombart, N. (author), Bonnedat, M. (author), de Maagt, P. (author), TNO Defensie en Veiligheid (author)
The performances of focal plane arrays that implement multibeam coverage from a single reflector antenna are usually reduced by conflicting requirements on the feed elements. Dense packing is required to minimize the beam separation, while typically large apertures provide the high feed directivity which in turn translates in low spill over...
conference paper 2007
document
Neto, A. (author), Gerini, G. (author), Bruni, S. (author), Maci, S. (author), TNO Defensie en Veiligheid (author)
An array of long slots, oriented along x, etched on a ground plane that separates two infinite dielectric materials constitutes the basic canonical problem investigated in this article. In a single slot structure, the direction of radiation and the attenuation constant could be directly linked to the dominant leaky wave pole (kxlw) that...
conference paper 2007
document
Bekers, D.J. (author), Monni, S. (author), Ducros, V. (author), Gerini, G. (author), Rochette, M. (author), TNO Defensie en Veiligheid (author)
The design of multi-layer Frequency Selective Surfaces often requires characterising the behaviour of the structure in wide frequency and angle ranges. Moreover, a fine tuning of the design leads to a large parameter space and results in a long computational time. To address this problem, an efficient parameterisation and interpolation technique...
conference paper 2007
document
Bekers, D.J. (author), Monni, S. (author), Ducros, V. (author), Gerini, G. (author), Rochette, M. (author), TNO Defensie en Veiligheid (author)
The design of multi-layer Frequency Selective Surfacesoften requires characterising the behaviour of the structurein wide frequency and angle ranges. Moreover, a fine tuning of the design leads to a large parameter space and resultsin a long computational time. To address this problem, an efficient parameterisation and interpolation technique...
conference paper 2007
document
Bonnedal, M. (author), de Maagt, P. (author), Neto, A. (author), Llombart, N. (author), Gerini, G. (author), TNO Defensie en Veiligheid (author)
This paper deals with the use of EBG super-layers to improve the shape of the illumination function of a center- fed reflector. Following an investigation of the leaky wave pole singularities of the EBG Green's function, the shape of the radiation patterns of small apertures in ground planes are optimized by properly tuning the super layers...
conference paper 2007
document
Neto, A. (author), Llombart, N. (author), Gerini, G. (author), Bonnedal, M.D. (author), de Maagt, P. (author), TNO Defensie en Veiligheid (author)
We describe the use of electromagnetic bandgap (EBG) super-layers to improve the shape of reflectors illumination function. Following an investigation of the leaky wave pole singularities of the EBG Green's function, the shape of the radiation patterns of small apertures in ground planes are optimized. The maximization of the reflector aperture...
article 2007
document
Bruni, S. (author), Neto, A. (author), Gerini, G. (author), Bekers, D.J. (author), TNO Defensie en Veiligheid (author)
This paper proposes a novel imaging architecture suited for use in the mm and the submm wave regimes. The structure is composed by a one dimensional array of radiators in order to enhance the image acquisition time with respect to single element detection. Moreover each of the antenna elements composing the array is characterized by a relatively...
conference paper 2007
document
Llombart, N. (author), Neto, A. (author), Gerini, G. (author), Bonnedal, M. (author), de Maagt, P. (author), TNO Defensie en Veiligheid (author)
conference paper 2007
document
de Maagt, P. (author), Gerini, G. (author), Llombart, N. (author), Neto, A. (author), TNO Defensie en Veiligheid (author)
We show how the design of integrated arrays can significantly benefit from planar circularly symmetric (PCS) electromagnetic band gap (EBG) structures. Using this technology, a phased array that scans up to 40° in one dimension and that is characterized by relatively large bandwidth (BW ≈ 15%) is designed, manufactured and tested. The specific...
article 2007
document
Neto, A. (author), Tijhuis, A.G. (author), Monni, S. (author), Gerini, G. (author), TNO Defensie en Veiligheid (author)
A modular technique originally proposed for waveguide junctions, the multimode equivalent network approach based on the integral equation formulation (IEMEN), is extended to the analysis of multilayer Frequency Selective Surfaces integrated with waveguide array antennas. This technique represents each layer and transition between layers in terms...
article 2007
document
Bonnedal, M. (author), Llombart, N. (author), Neto, A. (author), Gerini, G. (author), de Maagt, P. (author), TNO Defensie en Veiligheid (author)
The performances of focal plane arrays that implement multi-beam coverage from a single reflector antenna are usually reduced by conflicting requirements on the feed elements. Dense packing is required to minimize the beam separation, while typically large apertures provide the high feed directivity which in turn translates in low spill over...
conference paper 2007
Searched for: mods_originInfo_dateIssued_s:"2007"
(1 - 19 of 19)