321 research outputs found
Chipless RFID for Identification and Sensing
No full textWireless Power Transfer for RFID Systems / Smail Tedjini --
Computational Electromagnetics and Electromagnetic Compatibility for the Internet of Things / Ludger Klinkenbuschc --
Integrated Circuits Systems for mm-wave/RF Wireless Transceivers in IoT Applications (Communications) / Sergio Saponara --
ICs and VLSI Architectures for mm-wave/RF Wireless Transceivers in IoT Applications (Remote Sensing) / Sergio Saponara --
Chipless RFID for Identification and Sensing / David Girbau, Antonio Lazaro, Simone Genovesi and Filippo Costa --
Near-Field Focused Antennas for Short-Range Identification and Communication Systems / Giuliano Manara, Andrea Michel, Alice Buffi, and Paolo Nepa --
Ultra-low-power Devices, and Application of New Materials to mm-wave Antennas and Circuits / Massimo Macucci --
A Functionally Safe SW Defined Autonomous and Connected IoT / Riccardo Mariani
A Novel Electromagnetic Bandgap Structure for Broadband Switching Noise Suppression in High-Speed Printed Circuit Boards
No full textLow-Profile Three-Arm Folded Dipole Antenna for UHF Band RFID Tags Mountable on Metallic Objects
No full textOltre un nome tanto ingannevole: Capo Verde tra fonti storiche e poesia contemporanea
Get PDFThe Portuguese arrival at the Cape Verde archipelago and the subsequent settlement of the islands gave rise to a unique experiment in cultural fusion in the history of maritime exploration. The challenges faced by the initial settlers, both voluntary European colonists and forcibly displaced African slaves, are reflected in the rich cultural expressions of the Cape Verdean people. This article begins its examination by focusing on poetic production, engaging in a dialogue with one of its primary sources of inspiration: the history of the formation and development of the Cape Verdean nation. Through a series of more or less explicit references, it becomes apparent that national poetry often serves as a cathartic attempt to rewrite the country’s history, reappropriating it and ascribing new meaning to a past marked by slavery, famine, and forced migration. The poetry of the 20th century is analyzed in a reflective interplay with historical documents from the 15th and 16th centuries, aiming to elucidate the full philological scope of a specific rewriting process: the redefinition of Cape Verdean identity beyond the confines of the centuries-old colonial narrative
Characteristic Modes Analysis of a Near-Field Polarization-Conversion Metasurface for the Design of a Wideband Circularly Polarized X-Band Antenna
Get PDFA metasurface (MS) based on loop elements operating in the near field of a linearly-polarized microstrip antenna is employed to realize a circularly polarized radiated field. The properties of the loop unit cell are highlighted with the help of the Characteristic Mode Analysis that is employed for investigating the achievable linear to circular polarization conversion bandwidth and providing the guidelines for the design of the final antenna. A finite structure comprising 4×4 unit cells is tailored for achieving a circularly polarized far field within the whole X-band adopted for satellite communications (7.25 GHz-7.75 GHz, 7.9 GHz-8.4 GHz). A simple but effective single-port excitation scheme is adopted, and the overall performance are assessed by measurements on the fabricated prototype. The good agreement between simulated and measured results confirms the reliability of the proposed approach as well as the meaningful insight provided by Characteristic Modes Theory
Penrose Tiling Subarrays Exploiting Mixed Antenna Element Factors for Large-Scanning Phased Arrays
No full textCharacteristic Modes Analysis of Non-Uniform Metasurface Superstrate for Nanosatellite Antenna Design
No full textThis work addresses the use of the Characteristic Modes Analysis (CMA) for tailoring a
Metasurface (MTS) in view of exploiting it in compact, low-profile, Circularly Polarized (CP) antennas. The
investigated non-uniform MTS is exploited as a superstrate in the design of a novel compact and low-profile
antenna for nanosatellite applications. The MTS consists of a 3 x 4 array of unequal patches arranged in a
rectangular lattice. The antenna parameters are carefully tailored by using the CMA to achieve a significant
performance enhancement with respect to a uniform MTS in terms of both Axial Ratio (AR) bandwidth and
aperture efficiency. The reliability of the CMA approach is verified by assessing the overall performance
of the whole radiating structure comprising the stripline feeding excitation. The proposed MTS antenna is
compact (0.068 lambda0) provides a remarkable aperture efficiency going from 86 % up to 96 % and an AR
coverage in the upper hemisphere greater than 84 % within the desired S-band (2.025 - 2.29 GHz)
Low Profile Dielectric Transmitarray Based on Additive Manufacturing Technology
No full textA preliminary study concerning the possibility to exploit Additive Manufacturing (AM) technologies for the fabrication of a transmitarray (TA) is addressed. More in detail, dielectric unit cells are tailored to alter the phase profile of a TA panel operating at 30 GHz
Multiple characteristic modes excitation for pattern reconfigurable antennas design
No full textThe study of the Characteristic Modes (CMs) on a square conductive plane has been addressed to design a pattern reconfigurable antenna. More in detail, it is demonstrated that an efficient stimulation of suitable current modes distribution (Jn) by a proper placing of capacitive exciters over the square plate is able to provide a pattern reconfigurable capability. In particular, the positioning of the capacitive coupling exciters (CCEs) allows stimulating three current modes, whose modal excitation degree can be easily controlled. An appropriate phase shifting between the CCEs enables to control the modal excitation coefficient of the current modes, allowing the pattern reconfigurability
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