Article
Optics
Peng Xu, Kunyi Zhang, Haixia Liu, Ruijie Li, Long Li
Summary: This paper proposes a dual-band metasurface that generates multiple orbital angular momentum beams independently in full polarizations. The metasurface can be used in various applications such as wireless communication, target detection, and security encryption.
Article
Computer Science, Information Systems
Yi Lei, Yang Yang, Yanzhe Wang, Kai Guo, Yubin Gong, Zhongyi Guo
Summary: This experimental letter demonstrates the performance enhancement of 2x2 MIMO communication based on orbital angular momentum (OAM) by utilizing the diversity of different OAM modes. By using a versatile OAM antenna, the throughput of MIMO communication can be improved by up to 30.50% or 6.59% respectively.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2021)
Editorial Material
Optics
Gianluca Ruffato
Summary: A recent publication suggests a solution to overcome the limitations of optical techniques and high-intensity beams by probing highly-intense vortex pulses with a structured reference beam.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Optics
Chenguang Gu, Rui Yang, Yachao Li
Summary: The study presents a composite meta-surface beam former that generates reconfigurable multiple OAM vortex waves by integrating a polarization conversion meta-mirror with a multi-functional anisotropic meta-lens, allowing for tailored beam numbers, radiation directions, and topological charges. It shows that the anisotropic characteristics of the meta-lens can create different multiple OAM vortex waves when the meta-mirror is rotated or equipped with different polarized illuminations. This design could pave the way for the reconfigurable generation of multiple OAM vortex waves to expand communication capacity further.
Article
Physics, Applied
Heng Wang, Shixing Yu, Na Kou, Zhao Ding, Zhengping Zhang
Summary: This Letter presents a cylindrical conformal holographic impedance metasurface for orbital angular momentum (OAM) generation. The conformal holographic metasurface is designed by establishing the element library and deducing the formula of holographic tensor impedance modulation. The feasibility of the scheme is verified by simulations and experiments, and the results are in good agreement with theoretical analysis. The efficient generation of OAM vortex wave energy by the cylindrical conformal impedance metasurface provides a reference for OAM communication and vortex radars with conformal devices.
APPLIED PHYSICS LETTERS
(2022)
Article
Optics
Huibin Zhou, Hao Song, Zhe Zhao, Runzhou Zhang, Haoqian Song, Kai Pang, Kaiheng Zou, Cong Liu, Xinzhou Su, Nanzhe Hu, Robert Bock, Brittany Lynn, Moshe Tur, Alan E. Willner
Summary: The modal properties of a beam carrying orbital angular momentum generated by a circular array of multiple micro-ring emitters were investigated analytically and via simulation. The output beam consists of N vortex beams with the same OAM-order at the same wavelength, forming equidistant spectral components surrounding the central OAM-order with a spacing equal to N. The envelope of the OAM spectrum broadens with increased radius of the circular array or OAM-order value.
Article
Computer Science, Information Systems
Ahmed Al Amin, Soo Young Shin
Summary: In this letter, NOMA is integrated with OAM-MIMO and OAM-IM to improve downlink channel capacities for multiple users. Simulation results demonstrate that the proposed scheme outperforms conventional schemes in terms of both individual user and sum channel capacities.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2021)
Article
Computer Science, Information Systems
Ahmad Alamayreh, Nidal Qasem
Summary: This paper presents a lens antenna for 3D beam steering at microwave frequencies, utilizing the orbital angular momentum (OAM) property of the electromagnetic wave components. By optimizing the beam pointing direction through superposition of waves with different OAM orders, and controlling the elevation with a Maxwell fish-eye lens, the antenna achieves high directivity and narrow beamwidth over a wide spatial steering range. Detailed analysis of the lens characteristics on beam steering effects and effective demonstration through numerical simulations are provided.
Article
Nanoscience & Nanotechnology
Yuan Ren, Song Qiu, Tong Liu, Zhengliang Liu
Summary: This paper proposes an interference scheme utilizing vortex beams to achieve independent measurement of rotation and rectilinear motion. Experimental results demonstrate that this method can effectively detect multiple movement forms of a target even under complex motion backgrounds.
Article
Optics
Andong Wang, Long Zhu, Mingliang Deng, Bing Lu, Xiaojin Guo
Summary: This paper presents a method of mitigating atmospheric turbulence effects using OAM carrying orbital angular momentum, demonstrating transmitter mode diversity by designing multiple OAM phase patterns to enhance signal transmission quality and reliability.
Article
Chemistry, Multidisciplinary
Shuo Xu, He-Xiu Xu, Yanzhao Wang, Jian Xu, Chaohui Wang, Zhichao Pang, Huiling Luo
Summary: This study proposes a hybrid method to achieve multiple vortex beams with different modes in a planar microstrip array, which has great significance for wireless and radar communication systems.
Article
Telecommunications
Dandan Liu, Liangqi Gui, Ke Chen, Liang Lang, Zixiao Zhang, Han Chen, Lixing Liu, Tao Jiang
Summary: This paper investigates the characteristics of OAM waves generated by different types of dipole antenna arrays, and finds that the best OAM waves are produced by the same direction antenna array, while the other two antenna arrays have lower energy carrying pure OAM waves.
DIGITAL COMMUNICATIONS AND NETWORKS
(2021)
Article
Optics
Kaiheng Zou, Xinzhou Su, Murat Yessenov, Kai Pang, Narek Karapetyan, Maxim Karpov, Hao Song, Runzhou Zhang, Huibin Zhou, Tobias J. Kippenberg, Moshe Tur, Ayman F. Abouraddy, Alan E. Willner
Summary: This study investigates the tunability of space-time wave packets by varying the number of frequency comb lines and the combinations of spatial modes. The researchers experimentally generate and measure wave packets with tunable orbital angular momentum (OAM) values and also study the temporal pulse width and non-linear variation of OAM values in simulation.
Article
Optics
Peng Xu, Ruijie Li, Haixia Liu, Kunyi Zhang, Xin Wang, Long Li
Summary: This paper achieves the simultaneous and independent generation of multiple linear polarized vortex beams in different directions by elaborately splicing multiple transmissive metasurfaces with polarization isolation. The proposed method demonstrates effective control and isolation of polarization for generating desired vortex beams.
Article
Optics
Kai Pang, Kaiheng Zou, Hao Song, Zhe Zhao, Amir Minoofar, Runzhou Zhang, Haoqian Song, Huibin Zhou, Xinzhou Su, Cong Liu, Nanzhe Hu, Moshe Tur, Alan E. Willner
Summary: By coherently combining multiple frequencies, near-diffraction-free and near-dispersion-free OAM pulses with arbitrary group velocities have been generated. It has been found that both positive and negative group velocities can be achieved and continuously controlled, and that the simulated value of group velocity remains the same when the topological charge l is varied. However, as the l value increases, the pulse duration becomes longer for a given number of frequency lines.
Article
Engineering, Electrical & Electronic
Steven Caicedo Mejillones, Matteo Oldoni, Stefano Moscato, Giuseppe Macchiarella, D'Amico Michele, G. G. Gentili
Summary: This letter introduces a novel and more accurate synthesis method for inline extracted-pole low-pass prototype filters, which relies on the robustness and accuracy of coupling-matrix synthesis methods as a first step. The second step involves a transformation to obtain the desired inline extracted-pole topology. Three synthesis examples are presented to validate this novel synthesis procedure.
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Steven Caicedo Mejillones, Matteo Oldoni, Stefano Moscato, Giuseppe Macchiarella, Michele D'Amico, Gian Guido Gentili, Goran Biscevic
Summary: This article introduces a novel method for synthesizing low-pass prototype filters by applying a filter topology transformation using grouped node blocks. The method provides additional degree of freedom for filter synthesis and overcomes ad hoc techniques found in current literature. Several examples are presented to validate the new synthesis procedure.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2021)
Article
Engineering, Electrical & Electronic
Stefano Moscato, Giandomenico Cannone, Matteo Oldoni, Davide Tiradossi, Luca Pelliccia, Petar Jankovic, Fabrizio De Paolis
Summary: This paper presents the outcome of the Small user TErminal multi band DIplexer project, which aims to validate a novel SMD compliant planar diplexer. The diplexer combines a microstrip low-pass filter, a substrate integrated waveguide high-pass filter, and thin-film technology for manufacturing. It has a small footprint and seamless integration with surface mountable soldering process, making it suitable for consumer-oriented satellite links or man-pack applications. The diplexer is designed for the Ku 10.7-12.75 (RX) and Ka 27.5-30 (TX) GHz bands but can be easily adjusted for different frequency ranges.
INTERNATIONAL JOURNAL OF MICROWAVE AND WIRELESS TECHNOLOGIES
(2022)
Article
Engineering, Electrical & Electronic
Matteo Oldoni, Fabien Seyfert, Steven Caicedo Mejillones, Stefano Moscato, Giuseppe Macchiarella
Summary: This paper describes an analytical method to check whether a given 2-port matrix transfer function is passive, and proposes a technique to assess the maximum allowed predistortion.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2022)
Article
Biochemistry & Molecular Biology
Martina Casarin, Tiago Moderno Fortunato, Saima Imran, Martina Todesco, Deborah Sandrin, Giulia Borile, Ilaria Toniolo, Massimo Marchesan, Gino Gerosa, Andrea Bagno, Filippo Romanato, Emanuele Luigi Carniel, Alessandro Morlacco, Fabrizio Dal Moro
Summary: Bladder cancer is a common malignancy that often requires bladder removal surgery for treatment. However, the use of autologous intestine segments can lead to complications and affect patients' quality of life. This study aims to develop a bio-engineered material as a replacement, and the preliminary evaluation shows promising results for decellularized porcine small intestinal submucosa as a suitable candidate.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Polymer Science
Marika Faggioli, Arianna Moro, Salman Butt, Martina Todesco, Deborah Sandrin, Giulia Borile, Andrea Bagno, Assunta Fabozzo, Filippo Romanato, Massimo Marchesan, Saima Imran, Gino Gerosa
Summary: The most common aortic valve diseases in adults are stenosis and regurgitation. Pediatric patients have a lower incidence of aortic pathologies. Replacement of native valve with prosthetic valve requires consideration of durability. Both mechanical and biological prosthetic valves need to be replaced in pediatric patients. Acellular porcine aortic valve may be an alternative with lower immunogenic risk and longer lifespan. This study reports an efficient protocol for decellularization and evaluates the structural integrity, cell and nuclear component removal, and biomechanical properties.
Article
Biochemistry & Molecular Biology
Silvia Barbon, Elena Stocco, Martina Contran, Federico Facchin, Rafael Boscolo-Berto, Silvia Todros, Deborah Sandrin, Filippo Romanato, Piero Pavan, Veronica Macchi, Vincenzo Vindigni, Franco Bassetto, Raffaele De Caro, Andrea Porzionato
Summary: This study considers the use of cellular human diaphragm as a scaffold material for the treatment of volumetric muscle loss (VML). After decellularization through four detergent-enzymatic protocols, cells, DNA, and muscle fibers were effectively removed, while collagen/elastin and the majority of the glycosaminoglycan component were preserved. Adipose-derived stem cells cultured with decellularized samples demonstrated high viability, indicating the biosafety of the scaffolds. Acellular diaphragmatic grafts treated with SDS+Tergitol (TM) showed better collagen preservation and integrated well with host tissue upon implantation in mice.
Article
Cell Biology
Silvia Barbon, Andrea Biccari, Elena Stocco, Giovanni Capovilla, Edoardo D'Angelo, Martina Todesco, Deborah Sandrin, Andrea Bagno, Filippo Romanato, Veronica Macchi, Raffaele De Caro, Marco Agostini, Stefano Merigliano, Michele Valmasoni, Andrea Porzionato
Summary: Esophageal reconstruction using bio-engineered allografts that resemble the tissue extracellular matrix (ECM) properties is a promising strategy. This study successfully decellularized human esophagus using three detergent-enzymatic protocols and demonstrated preservation of ECM components, retention of collagen and elastin, and reduced immunogenicity. It also showed changes in tissue stiffness but maintained sample integrity. The study highlights the potential of using decellularized esophageal matrices for future tissue repopulation and orthotopic implantation.
Article
Engineering, Biomedical
Martina Casarin, Martina Todesco, Deborah Sandrin, Filippo Romanato, Andrea Bagno, Alessandro Morlacco, Fabrizio Dal Moro
Summary: Bladder cancer is the most common malignancy in the urinary tract. Radical cystectomy is the gold standard treatment, but complications associated with using a patient's bowel segment as a urinary diversion have led to the search for alternative solutions. This study proposes the use of decellularized porcine small intestinal submucosa (SIS) as a material for urinary conduit substitution and creates hybrid membranes by coupling decellularized SIS with two commercially available polycarbonate urethanes. The hybrid membranes show improved mechanical resistance and cell compatibility compared to decellularized SIS alone, suggesting that they could be a suitable candidate for urinary diversion.
JOURNAL OF FUNCTIONAL BIOMATERIALS
(2022)
Article
Polymer Science
Susanna Tondato, Arianna Moro, Salman Butt, Martina Todesco, Deborah Sandrin, Giulia Borile, Massimo Marchesan, Assunta Fabozzo, Andrea Bagno, Filippo Romanato, Saima Jalil Imran, Gino Gerosa
Summary: Right ventricle outflow tract obstruction (RVOTO), accounting for about 15% of congenital heart diseases, often requires pulmonary valve replacement. This study investigated the use of a new detergent (Tergitol) to decellularize porcine pulmonary valves for scaffold production. The decellularized scaffolds were evaluated for structural integrity, and their compatibility with mesenchymal stem cells was assessed. Tergitol efficiently removed nuclear material while preserving the matrix's structural proteins, making it a potential alternative to Triton X-100.
Article
Cell Biology
Elena Stocco, Silvia Barbon, Marco Mammana, Diletta Trojan, Alice Bianchin, Francesca Favaretto, Martina Contran, Giovanni Zambello, Andrea Vogliardi, Marta Confalonieri, Silvia Todros, Piero G. Pavan, Filippo Romanato, Maria Teresa Conconi, Veronica Macchi, Raffaele De Caro, Federico Rea, Andrea Porzionato
Summary: The study aimed to develop a new decellularized trachea from pig tissue and compare it with cryopreserved trachea for predictive analysis. The decellularization effectively removed Alpha-Gal epitopes, while cryopreserved samples retained some respiratory epithelial cells. Despite some limitations, both cryopreserved and decellularized trachea are viable options that require further investigation in comparative animal studies.
Article
Engineering, Multidisciplinary
Martina Todesco, Saima Jalil Imran, Tiago Moderno Fortunato, Deborah Sandrin, Giulia Borile, Filippo Romanato, Martina Casarin, Germana Giuggioli, Fabio Conte, Massimo Marchesan, Gino Gerosa, Andrea Bagno
Summary: Human and animal pericardium are commonly used materials for repairing damaged tissues in cardiovascular surgery, but they have drawbacks such as calcification and limited availability. Decellularized pericardium, which removes cellular and nuclear components, shows potential as a scaffold for cardiovascular tissue regeneration. This study evaluates the effects of a new detergent on decellularizing bovine and porcine pericardium, and finds that the decellularized pericardium retains its extracellular matrix structure without cytotoxic effects.
Proceedings Paper
Engineering, Electrical & Electronic
Matteo Oldoni, Steven Caicedo Mejllones, Stefano Moscato, Andrea Giannini
Summary: The coexistence of wireless data links and radio sensing instruments on scientific satellites presents challenges for electromagnetic compatibility. Integrating filtering functions into the downlink antenna can effectively improve isolation by suppressing out-of-band emissions. This manuscript introduces a filtenna design based on radial stub insertion in a coaxial horn and presents simulated results to validate the principle.
2021 IEEE MTT-S INTERNATIONAL MICROWAVE FILTER WORKSHOP (IMFW)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Giandomenico Cannone, Stefano Moscato, Matteo Oldoni
Summary: This paper presents an overview of passive components in multi-carrier single-antenna wireless backhaul systems to enhance data throughput for 5G deployment in the C-band. It focuses on three core components utilizing metallic hollow waveguide technology, including a balanced coupler, a circulator, and an orthomode transducer, with specifications and measured data provided for each device.
2021 IEEE MTT-S INTERNATIONAL MICROWAVE FILTER WORKSHOP (IMFW)
(2021)
Proceedings Paper
Computer Science, Artificial Intelligence
Steven Caicedo, Matteo Oldoni, Stefano Moscato
Summary: This paper discusses the importance of reconfiguring the front and backhaul of networks for SDN in 5G networks, and the feasibility of using phased array antennas instead of reflector antennas. It analyzes challenging requirements such as energy consumption and compliance with regulatory radiation masks, and proposes possible solutions and future research directions.
INTERNET OF THINGS, INFRASTRUCTURES AND MOBILE APPLICATIONS
(2021)
