Dr. Nicola Anselmi

ELEDIA@UniTN - University of Trento

Dr. Nicola Anselmi

ELEDIA@UniTN - University of Trento

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Academic Career Length

11Years (2016-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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2 February 2022 in IEEE Transactions on Antennas and Propagation

Journal Article

On the Design of Modular Reflecting EM Skins for Enhanced Urban Wireless Coverage

The design of modular, passive, and static artificial metasurfaces to be used as electromagnetic skins (EMSs) of buildings for improving the coverage in urban millimeter-wave communication scenarios is addressed. Towards this end, an ad-hoc design strategy is presented to determine optimal trade-off implementative solutions that assure a suitable coverage of the areas of interest, where the signal from the base station is too weak, with the minimum complexity. More specifically, the admissible surface in the building facade is first partitioned into tiles, which are the minimum-size elements of the artificial coating (i.e., the building block of an EMS). Then, the search for the optimal EMS layout (i.e., the minimum number and the positions of the tiles to be installed) is carried out with a binary multi-objective optimization method. Representative numerical results are reported and discussed to point out the features and the potentialities of the EMS solution in the smart electromagnetic environment (SEME) as well as the effectiveness of the proposed design method.

5 February 2020 in IEEE Transactions on Antennas and Propagation

Journal Article

An Irregular Two-Sizes Square Tiling Method for the Design of Isophoric Phased Arrays

The design of isophoric phased arrays composed of two-sized square-shaped tiles that fully cover rectangular apertures is dealt with. The number and the positions of the tiles within the array aperture are optimized to fit desired specifications on the power pattern features. Towards this end, starting from the derivation of theoretical conditions for the complete tileability of the aperture, an ad-hoc coding of the admissible arrangements, which implies a drastic reduction of the cardinality of the solution space, and their compact representation with a graph are exploited to profitably apply an effective optimizer based on an integer-coded Genetic Algorithm. A set of representative numerical examples, concerned with state-of-the-art benchmark problems, is reported and discussed to give some insights on the effectiveness of both the proposed tiled architectures and the synthesis strategy.

4 December 2019 in IEEE Transactions on Antennas and Propagation

Journal Article

System-by-Design Multiscale Synthesis of Task-Oriented Reflectarrays

Angelo Gelmini

31 May 2016 in Sensors

Journal Article

Power Pattern Sensitivity to Calibration Errors and Mutual Coupling in Linear Arrays through Circular Interval Arithmetics

The sensitivity to both calibration errors and mutual coupling effects of the power pattern radiated by a linear array is addressed. Starting from the knowledge of the nominal excitations of the array elements and the maximum uncertainty on their amplitudes, the bounds of the pattern deviations from the ideal one are analytically derived by exploiting the Circular Interval Analysis (CIA). A set of representative numerical results is reported and discussed to assess the effectiveness and the reliability of the proposed approach also in comparison with state-of-the-art methods and full-wave simulations.

6 November 2018 in IEEE Transactions on Antennas and Propagation

Journal Article

Optimal Phase-Matching Strategy for Beam Scanning of Sub-Arrayed Phased Arrays

Paolo Rocca

Mohammad Abdul Hannan

Lorenzo Poli

Nicola Anselmi

Andrea Massa

The design of phased array antennas generating two functional beams is here addressed. The first/primary beam is fixed and it is generated at the element level through the complex (amplitude and phase) weighting coefficients, while the second/secondary one is synthesized at the sub-array level by aggregating the array elements into non-overlapped clusters and using additional phase shifters at the clusters outputs. Towards this end, the sub-array configuration is determined by means of an ad-hoc iterative method aimed at reducing the unavoidable quantization lobes, while the synthesis of the sub-array phase coefficients, once the excitations at the element level have been set, is cast as a phase-matching problem whose analytic solution is optimal since it guarantees the minimum least-square error with respect to a reference phase distribution. A set of representative numerical results is reported and discussed to validate the proposed design approach and to point out its features and potentialities when addressing the synthesis of both pencil and shaped-beam power patterns.

3 July 2023 in IEEE Antennas and Wireless Propagation Letters

Journal Article

Interval-Bounded Optimal Power Pattern Synthesis of Array Antenna Excitations Robust to Mutual Coupling

A method for the optimal synthesis of linear phased arrays when calibration errors and mutual coupling are present is proposed. Starting from the knowledge of the mutual coupling model and of the calibration tolerances, the Circular Interval Analysis ( CIA ) is used to derive analytic and reliable power pattern bounds used within a Convex Programming ( CP )-based optimization, such that the lower bound of the power pattern main beam peak is maximized while the sidelobes are constrained by an arbitrary upper-bound mask. To evaluate the reliability and effectiveness of the proposed CIA - CP methodology, a set of representative numerical results is reported and compared with Monte Carlo and full-wave simulations.

About Me

Nicola ANSELMI received the MS Degree in Telecommunication Engineering from the University of Trento, Italy, in 2012, and the Ph.D. degree from the International Doctoral School in Information and Communication Technology, Trento, Italy, in 2018. He is currently Assistant Professor at the Department of Information Engineering and Computer Science (DISI) at the University of Trento, and a Research Fellow of the ELEDIA Research Center. Dr. Anselmi research activities are mainly focused on synthesis methods for unconventional antenna array architectures, tolerance analysis of antenna systems, and electromagnetic inverse scattering techniques, with interest on compressive sensing methodologies for microwave imaging applications. In 2019 Dr. Anselmi received the Italian National Scientific Qualification for the position of Associate Professor, and the Qualification aux fonctions de maître de conférences. Moreover, he has been the recipient of the "Giorgio Barzilai" award for Young Researchers by the Italian Electromagnetic Society (SIEM) in 2016, of the "Young Scientist" Prize by the Applied Computational Electromagnetics Society (ACES) in 2018, and of the "Mini‐Circuits Harvey Kaylie Best

Dr. Nicola Anselmi

Dr. Nicola Anselmi

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Representative Publications

About Me