Searched for: author%3A%22Gandini%2C+E%22
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Yepes Julia, C. (author), Gandini, E. (author), Monni, S. (author), Neto, A. (author), Vliet, F. E. van (author), Cavallo, D. (author)
In this letter, we present a design of a linear array of tilted dipoles to achieve radiation patterns with asymmetric angular filtering characteristics. To realize the asymmetric radiation, the dipole elements are spaced by a distance larger than half a wavelength, thus allowing for grating lobes to occur in the visible region. Moreover, the...
journal article 2020
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Yepes Julia, C. (author), van Schelven, R.M. (author), Cavallo, D. (author), Gandini, E. (author), Monni, Stefania (author), Van Vliet, Frank E. (author)
Antenna arrays located on airplanes or other mobile platforms for satellite communication applications are typically required to support very large scan angles (close to end-_re). How- ever, planar antenna arrays are typically characterized by scan loss. To increase the scan range conformal arrays and multi-panel configuration can be found in...
abstract 2019
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Yepes Julia, C. (author), Gandini, E. (author), Monni, Stefania (author), Van Vliet, Frank E. (author), Neto, A. (author), Cavallo, D. (author)
We propose a systematic approach to describe planar slot antennas, embedded in generic stratified media. An equivalent transmission line model for the slot is proposed, based on a spectral domain analysis. First, we introduce a method of moments solution to model semi-infinite slots, fed by a deltagap excitation. The solution entails only two...
abstract 2019
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Yepes Julia, C. (author), Neto, A. (author), Cavallo, D. (author), Gandini, E (author), Van Vliet, Frank E. (author), Monni, Stefania (author)
We present the design of an array of tilted dipoles loaded with artificial dielectrics, to achieve asymmetric radiation patterns. First, a simplified array element consisting of skewed stacked dipoles in the presence of a backing reflector is studied, by means of a dedicated spectral periodic method of moments (MoM). The analysis of the stacked...
conference paper 2019
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Yepes Julia, C. (author), Cavallo, D. (author), Gandini, E. (author), Monni, Stefania (author), Neto, A. (author), van Vliet, Frank E. (author)
A five-layer frequency selective surface (FSS) composed of subwavelength elements with large harmonic rejection bandwidth is presented. The FSS design is based on an equivalent circuit model, where the interlayer interaction is only described with a single transmission line representing the fundamental Floquet wave. A prototype of the...
journal article 2018
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Gandini, E. (author), Tamminen, Aleksi (author), Luukanen, Arttu (author), Llombart, Nuria (author)
A wide field of view (FOV) inversely magnified dual-lens system for submillimeter wavelength imagers is presented in this paper. The antenna is designed for near-field focusing, at a range of 2.1 m from the primary aperture and to work in the frequency range from 200 to 600 GHz. The half-power beamwidth (HPBW) is 0.27° (1 cm in the image...
journal article 2018
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Dabironezare, Shahab Oddin (author), Hassel, J. (author), Gandini, E. (author), Grönberg, L. (author), Sipola, H. (author), Vesterinen, V. (author), Llombart, Nuria (author)
In this contribution, a focal plane array (FPA) at submillimeter wavelengths is presented for security applications. The detectors are based on kinetic inductance bolometers. Two frequency selective absorber (FSA) sets were designed to implement a security imager. The effective pattern of the imager coupled to a black body point source over a...
conference paper 2018
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Dabironezare, Shahab Oddin (author), Hassel, Juha (author), Gandini, E. (author), Grönberg, Leif (author), Sipola, Hannu (author), Vesterinen, V.I. (author), Llombart, Nuria (author)
Passive imaging cameras at sub-millimeter wavelengths with large format focal plane arrays are being developed as the next generation of security screening systems. In this contribution, a dual-band focal plane array (FPA) for security imagers at submillimeter wave frequencies is presented. The detectors are based on bolometric...
journal article 2018
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Gandini, E. (author), Svedin, Jan (author), Bryllert, Thomas (author), Llombart, Nuria (author)
In this paper, the practical tradeoffs for designing submillimeter wavelength imagers based on optomechanical systems combined with focal plane arrays (FPAs) are presented. The architecture of these systems differs for operation at short and long ranges. General formulas to derive the effective field of view of diffraction limited quasi...
journal article 2017
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Llombart, Nuria (author), Gandini, E. (author), Tamminen, A. (author), Luukanen, A. (author)
The aim of the European project CONSORTIS is the development of a walk-by imaging system for concealed object detections working at submillimetre-wave frequencies. This imager will allow to image a full body at two frequency bands with high sensitivity (<;1K) and large frame rate (10Hz). The imager relies on a large focal plane array with...
conference paper 2016
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