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50 results on '"Mazzinghi, Agnese"'

4. Towards Space Deployment of the NDSA Concept for Tropospheric Water Vapour Measurements

Author

Facheris, Luca, primary, Antonini, Andrea, additional, Argenti, Fabrizio, additional, Barbara, Flavio, additional, Cortesi, Ugo, additional, Cuccoli, Fabrizio, additional, Del Bianco, Samuele, additional, Dogo, Federico, additional, Feta, Arjan, additional, Gai, Marco, additional, Gregorio, Anna, additional, Macelloni, Giovanni, additional, Mazzinghi, Agnese, additional, Melani, Samantha, additional, Montomoli, Francesco, additional, Ortolani, Alberto, additional, Rovai, Luca, additional, Severin, Luca, additional, and Scopa, Tiziana, additional

Published
2023
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5. Miniaturized UWB Dual-Port Antenna for Localization Applications

Author

Mazzinghi, Agnese, Barras, David, Danev, Boris, and Freni, Angelo

Abstract

This letter concerns a compact ultrawideband dual-port, dual-polarization antenna working from 6 to 9 GHz that can be integrated conveniently into a miniaturized transceiver, such as a car key, a dongle, or a small remote control, that uses a CR2032 battery. In fact, the proposed antenna is at one with the battery and the battery holder and assures a direct current connection between the battery and the transceiver electronics. It follows that the volume overall is almost the same as that occupied by the battery plus the battery holder. The low reflection coefficient at both input ports and the good isolation allow having an envelope correlation coefficient lower than −30 dB in the entire frequency band.

Published
2024
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17. Asymptotic approximation of mutual admittance involved in MoM analysis of RLSA antennas

Author

Albani, Matteo, Mazzinghi, Agnese, and Freni, Angelo

Subjects
Antenna arrays -- Design and construction, Approximation theory -- Methods, Finite element method -- Usage, Business, Computers, Electronics, Electronics and electrical industries
Abstract

In this paper, a computationally efficient method of moments (MoM) formulation is presented that makes use of an approximate asymptotic formula for the slot mutual admittance. The formula accuracy to the asymptotic order O([r.sup.-3/2]) gives sufficient precision for moderate slot distance (1.5-2 wavelengths). In a typical radial line slot array analysis, this permits avoiding the numerical integration in more than 90% of the slot pairs with a savings of CPU time of the same order. Index Terms--Antenna arrays, asymptotic methods, method of moments (MoM), radial line slot array (RLSA).

Published
2009

33. A 60-GHz RLSA fed by butler matrix carrying three OAM modes

Author

Xu, Xin, Mohri, Dan, Mazzinghi, Agnese, Freni, Angelo, HIROKAWA, JIRO, Ando, Makoto, and Araki, Kiyomichi

Subjects
Angular momentum, Engineering, Waveguide (electromagnetism), Radial line slot antenna, business.industry, Phase (waves), 020206 networking & telecommunications, 02 engineering and technology, 021001 nanoscience & nanotechnology, Parallel plate, Multiplexing, Optics, 0202 electrical engineering, electronic engineering, information engineering, Antenna (radio), 0210 nano-technology, business, Butler matrix
Abstract

We propose a 60-GHz radial line slot antenna (RLSA), which is fed by a Butler matrix, for orbital angular momentum (OAM) applications. The Butler matrix is placed at the lower layer and it is based on a post-wall waveguide structure. It has four input ports and it can launch different progressive phase states in the RLSA parallel plate waveguide (PPW). The RLSA in the upper layer is fed by the Butler matrix through four posts. The simulated results show that, at the design frequency, the proposed antenna can generate three OAM-mode states: l = 0, −1 and +1.

Published
2017

43. Bessel beam generation with a RLSA antenna

Author

Mazzinghi, Agnese, primary, Freni, Angelo, additional, Balma, Massimo, additional, Devona, Dorina, additional, Guarnieri, Giacomo, additional, Mauriello, Giuseppe, additional, and Albani, Matteo, additional

Published
2013
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46. Rigorous MoM Analysis of Finite Conductivity Effects in RLSA Antennas.

Author

Albani, Matteo, Mazzinghi, Agnese, and Freni, Angelo

Subjects
*SLOT antennas, *MATHEMATICAL models, *ELECTRICAL conductors, *SUBMILLIMETER waves, *GREEN'S functions, *ELECTRIC impedance, *BOUNDARY value problems
Abstract

Although slot antennas are usually modeled as perfectly electric conductors, for accurate antenna design and optimization, ohmic loss effects cannot be neglected. This is especially true in millimeter and submillimeter-wave applications, and in low-cost technology for mass production, where highly conductive surfaces are out of budget. This paper presents a rigorous but efficient method-of-moments (MoM) formulation for the analysis of radial line slot array (RLSA) antennas, which includes the finite conductivity of metals. First, by using equivalence and reciprocity theorems, effective magnetic currents are defined on each slot aperture, instead of standard electric and magnetic equivalent currents. This choice halves the number of unknowns of the MoM linear system, still preserving the rigor of the electromagnetic formulation. Next, proper Green's functions accounting for the finite conductivity of metals are derived analytically and used in the MoM admittance matrix expressions. A numerical check of self and mutual admittances for a couple of slots etched in a nonperfectly conducting structure is provided against results from a finite-element method. Finally, a few RLSA realizations are analyzed to investigate the effect of ohmic losses in a practical antenna design. [ABSTRACT FROM AUTHOR]

Published
2011
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47. Influence of the Finite Slot Thickness on RLSA Antenna Design.

Author

Mazzinghi, Agnese, Freni, Angelo, and Albani, Matteo

Subjects
*THICKNESS measurement, *ANTENNA arrays, *MOMENTS method (Statistics), *RADIAL basis functions, *SLOT antennas
Abstract

In this communication, we consider the effect of the thickness of the plate where slots are cut into, with reference to the design of a radial line slot array antenna. We show that the zero-thickness approximation results in a significant lack of accuracy even though the slot thickness is of the order of one-thirtieth of the wavelength. Then, we investigate and compare the accuracy and the efficiency of various approximate numerical techniques that can be conveniently employed in the full-wave analysis and optimization process of the antenna. [ABSTRACT FROM AUTHOR]

Published
2010
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50. Millimeter Wave Automotive Antenna for 5G Communications

Author

Agnese Mazzinghi, Luca Vincetti, M. Cerretelli, Stefano Lenzini, Lenzini, Stefano, Mazzinghi, Agnese, Cerretelli, Matteo, and Vincetti, Luca

Subjects
Physics, mmW Antenna Automotive 5G, Frequency band, Distortion, Acoustics, Extremely high frequency, Path loss, Metamaterial, Antenna (radio), Multipath propagation, Computer Science::Information Theory, Radiation pattern
Abstract

In this paper an antenna module for automotive 5G communication is presented. The antenna is designed to cover all the 3GPP n258 frequency band i.e. from 24.25 GHz to 27.5 GHz. At these frequencies, the path loss and obstacles attenuation are high. For this reason, to reach an acceptable communication distance a relatively high gain is required. Furthermore, to achieve a more robust system to multipath interferences the antenna is designed to operate with dual linear polarization. The proposed antenna is composed by an array of 8 dual polarized stacked patches. Finally, in order to suppress the radiation pattern distortion due to surface waves (SWs) propagation, an Electronic Band Gap (EBG) structure is implemented. To validate the design a prototype has been realized and measured.

Published
2021

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