Papers by Marco Passafiume
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2022 17th European Microwave Integrated Circuits Conference (EuMIC)
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2022 Wireless Power Week (WPW)
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2022 IEEE/MTT-S International Microwave Symposium - IMS 2022
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IEEE Transactions on Circuits and Systems I: Regular Papers
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2021 18th European Radar Conference (EuRAD)
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IEEE Transactions on Power Electronics, 2016
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2019 PhotonIcs & Electromagnetics Research Symposium - Spring (PIERS-Spring), 2019
The detection of Unmanned Aerial Vehicles (UAVs) of micro/nano dimensions, is becoming a hot topi... more The detection of Unmanned Aerial Vehicles (UAVs) of micro/nano dimensions, is becoming a hot topic, due to their large diffusion, and represents a challenging task from both the system architecture and components point of view. The Frequency Modulated Continuous Wave (FMCW) radar architecture in a Multi-Input Multi-Output configuration has been identified as the most suitable solution for this purpose, due to both its inherent short-range detection capability and compact implementation. This paper describes the operation and technology challenges inherent to the development of a millimeter-wave FMCW MIMO radar for small UAVs detection. In particular it analyzes the sub-systems specifications and the expected system performance with respect to a chip set designed and developed in GaN at 37.5 GHz applications.
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Progress In Electromagnetics Research M, 2022
We present a parametric analysis for a compact notch filter based on meta-material elements, suit... more We present a parametric analysis for a compact notch filter based on meta-material elements, suitable for the mitigation of interferences occurring at 5.9GHz and impacting a 5.8GHz DSRC receiver. The filter adopts a defected ground plane structure, which is derived by the class of complementary split ring resonator (CSRR) structures and further developed to improve the selectivity. The designed filter preserves the 5.8GHz DSRC signal and attenuates the 5.9GHz ITS-G5 signal of more than 20 dB, thus suited to improve dynamic range of DSRC vehicular receivers. This work introduces the new filter structure characteristics, its design principles, and the corresponding experimental validation.
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IEEE Microwave and Wireless Components Letters, 2021
This letter introduces for the first time a fully integrated analog vectorial modulator (VM) in g... more This letter introduces for the first time a fully integrated analog vectorial modulator (VM) in gallium nitride on silicon (GaN-on-Si) monolithic microwave-integrated circuit (MMIC) technology, operating in $Ka$ -band, and an analytical calibration technique suitable for VM. An extensive characterization of the prototype, with both static and dynamic modulating signals, validates both the design and the calibration technique. The VM is capable to produce corrected constellations with accuracy of 0.06 dB and 0.28° root mean square, respectively, for amplitude and phase, across the 35–40 GHz bandwidth. Furthermore, it is capable to generate single-side modulated signal with undesired sideband suppression in excess of 47 dBc.
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2019 PhotonIcs & Electromagnetics Research Symposium - Spring (PIERS-Spring), Jun 1, 2019
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Neuropediatrics, 2010
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IEEE Journal of Radio Frequency Identification, 2020
This article presents design principles for a totally batteryless and cost-effective wireless tra... more This article presents design principles for a totally batteryless and cost-effective wireless transponder, based on commercially-of-the-shelf (COTS) components. The transponder architecture is compliant with the physical layers of most common vehicular dedicated short range communications (DSRC) applications operating at 5.8 GHz. The paper is organized in two parts. We discuss firstly the design principles and system architecture, which includes both the energy harvesting and the back-scattering modes. The second part introduces a batteryless transponder prototype for vehicular DSRC, as result of the discussed design principles. In this part of the article reports a full set of experimental results, illustrating the consistency with the design principles, as well as the effective performance in terms of power consumption, energy efficiency and radio communication capabilities. In particular we report that at the distance of 1.05 m, a legacy road-side unit can establish both the down...
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2016 European Radar Conference (EuRAD), 2016
Sub-meter localization systems based on a network of SBAs capable of standard IEEE radio communic... more Sub-meter localization systems based on a network of SBAs capable of standard IEEE radio communications (WiFi/Bluetooth/ZigBee) are becoming of real interest due to improvements in the computational capability of mobile devices: these systems realize optimal data-contextualization as a layer placed over standard communication, so the positioning service becomes available to every client of the network. This paper presents an enhanced triangulation algorithm adapted to RSSI-DoA localization networks, specifically designed to exploit the RSSI evaluation given from localizing network anchor nodes, thus reducing the localization error due to RSSI-DoA system weaknesses.
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2020 IEEE MTT-S International Conference on Microwaves for Intelligent Mobility (ICMIM), 2020
This work presents a novel approach for concurrent synchronous multi-lane communications between ... more This work presents a novel approach for concurrent synchronous multi-lane communications between Road Side Units (RSUs) and On-Board Units (OBUs), based on the flexibility of software defined radio receivers. By exploiting frequency multiplexing, the proposed technique guarantees the concurrent communications of two RSUs with the same OBU across the road, without any need for additional selective filtering. The technique applies to the electronic toll collecting systems operating under the ETSI ES200674 communication standard, in which it enables the free-flow application. Experimental validations show a behavior backing the suggested technique, and field tests demonstrate a communication area compatible with the real-case scenario usage.
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2020 IEEE MTT-S International Conference on Microwaves for Intelligent Mobility (ICMIM), 2020
This paper presents a novel technique suitable to build a basis matrix for image recovery in Comp... more This paper presents a novel technique suitable to build a basis matrix for image recovery in Compressive Sensing Multiple-Input Multiple-Output (CS-MIMO) radar. The proposed technique selects the best sparsifying basis matrix through the use of Gaussian noise, achieving the $\mathrm{R}^{N}$ orthonormal space base with the sparsest structure. A comparison is made between the performance of this optimized basis matrix with both the Fast Fourier Transformation (FFT) and the Haar wavelet. Improvement with respect to optimum Nyquist criterion is quantitatively evaluated by using the effective Target peak to Secondary peak Ratio (TSR). Experimental data on a MIMO radar shows that this basic matrix maintains the Field of View (FOV), while improving the angular resolution with respect to the prior sparsity matrix.
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2019 IEEE International Conference on RFID Technology and Applications (RFID-TA), 2019
In this paper the authors introduce a new method to optimize RF to DC energy conversion in a COTS... more In this paper the authors introduce a new method to optimize RF to DC energy conversion in a COTS-based energy harvesting system. The system under investigation is composed by an RF envelope detector, cascaded with a commercial DCDC module. Being the latter characterized by a low impedance input stage, which is hardly modeled by a linear time-invariant resistance, this imposes stringent requirements to the energy conversion optimization. The paper shows how to approach this constraint by involving source-pull technique, and provides experimental validation and results discussion. The developed prototype operating at 5.8 GHz RF, with carrier power of -5dBm, results capable to drive devices, having supply requirements of Vdc =3.3V and Idc $\geq$5mA.
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Electronics
With the increase in small unmanned aerial vehicle (UAV) applications in several technology areas... more With the increase in small unmanned aerial vehicle (UAV) applications in several technology areas, detection and small UAVs classification have become of interest. To cope with small radar cross-sections (RCSs), slow-flying speeds, and low flying altitudes, the micro-Doppler signature provides some of the most distinctive information to identify and classify targets in many radar systems. In this paper, we introduce an effective model for the micro-Doppler effect that is suitable for frequency-modulated continuous-wave (FMCW) radar applications, and exploit it to investigate UAV signatures. The latter depends on the number of UAV motors, which are considered vibrational sources, and their rotation speed. To demonstrate the reliability of the proposed model, it is used to build simulated FMCW radar images, which are compared with experimental data acquired by a 77 GHz FMCW multiple-input multiple-output (MIMO) cost-effective automotive radar platform. The experimental results confirm...
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Electronics Letters
We propose a direction of arrival (DoA) estimation technique, which is enabled by a single printe... more We propose a direction of arrival (DoA) estimation technique, which is enabled by a single printed patch antenna capable of four reconfigurable beams at the operative frequency of 2.45 GHz. The direction of the messages sent by a nomadic wireless node is estimated and stored without the need of lengthy offline measurements, by correlating the real-time received signal strength actual data and the expected antenna beams. The comparison is implemented with a least square technique with an extremely reduced computational cost. Experimental validations demonstrate the DoA estimation capability, with a mean error <2.3° with a variance of 1.9° within a domain of 90°.
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Papers by Marco Passafiume