Searched for: author%3A%22Yepes+Julia%2C+C.%22
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Yepes Julia, C. (author)
In recent years, radar systems and satellite communications require phased array antennas that are capable of incorporating frequency and angular selectivity while maintaining a low profile. Active phased array antennas must comply with stringent requirements in terms of sensitivity to interference caused by other nearby radiating systems,...
doctoral thesis 2020
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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
document
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
document
Yepes Julia, C. (author), Gandini, Erio (author), Monni, Stefania (author), Van Vliet, Frank E. (author), Neto, A. (author), Cavallo, D. (author)
In this work, antenna arrays with tilted dipoles are investigated in terms of radiation and impedance properties. A spectral method of moments (MoM) was developed for the analysis of doubly-periodic arrays (i.e. periodic in both x and ydirections)<br/>with arbitrarily tilted dipole elements, in free space or in the presence of a backing...
conference paper 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
document
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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