scholarly journals On-Chip Integrated Distributed Amplifier and Antenna Systems in SiGe BiCMOS for Transceivers with Ultra-Large Bandwidth

Frequenz ◽  
2017 ◽  
Vol 71 (9-10) ◽  
pp. 473-484
Author(s):  
Paolo Valerio Testa ◽  
Bernhard Klein ◽  
Ronny Hahnel ◽  
Dirk Plettemeier ◽  
Corrado Carta ◽  
...  
Keyword(s):  
State Of The Art ◽  
Research Work ◽  
The State ◽  
Integrated System ◽  
Ultra Wideband ◽  
Single Chip ◽  
System Architectures ◽  
Distributed Amplifiers ◽  
Distributed Amplifier ◽  
Bicmos Technology

Abstract This paper presents an overview of the research work currently being performed within the frame of project DAAB and its successor DAAB-TX towards the integration of ultra-wideband transceivers operating at mm-wave frequencies and capable of data rates up to 100 Gbits $^{-1}$. Two basic system architectures are being considered: integrating a broadband antenna with a distributed amplifier and integrate antennas centered at adjacent frequencies with broadband active combiners or dividers. The paper discusses in detail the design of such systems and their components, from the distributed amplifiers and combiners, to the broadband silicon antennas and their single-chip integration. All components are designed for fabrication in a commercially available SiGe:C BiCMOS technology. The presented results represent the state of the art in their respective areas: 170 GHz is the highest reported bandwidth for distributed amplifiers integrated in Silicon; 89 GHz is the widest reported bandwidth for integrated-system antennas; the simulated performance of the two antenna integrated receiver spans 105 GHz centered at 148GHz, which would improve the state of the art by a factor in excess of 4 even against III-V implementations, if confirmed by measurements.

Traffic Analysis Using IoT for Improving Secured Communication

2021 ◽  
pp. 106-116
Author(s):  
Lakshman Narayana Vejendla ◽  
Alapati Naresh ◽  
Peda Gopi Arepalli
Keyword(s):  
Internet Of Things ◽  
Routing Protocols ◽  
State Of The Art ◽  
Research Work ◽  
System Security ◽  
Traffic Analysis ◽  
The State ◽  
Software Sensors ◽  
Secured Communication

Internet of things can be simply referred to as internet of entirety, which is the network of things enclosed with software, sensors, electronics that allows them to gather and transmit the data. Because of the various and progressively malevolent assaults on PC systems and frameworks, current security apparatuses are frequently insufficient to determine the issues identified with unlawful clients, unwavering quality, and to give vigorous system security. Late research has demonstrated that in spite of the fact that system security has built up, a significant worry about an expansion in illicit interruptions is as yet happening. Addressing security on every occasion or in every place is a really important and sensitive matter for many users, businesses, governments, and enterprises. In this research work, the authors propose a secret IoT architecture for routing in a network. It aims to locate the malicious users in an IoT routing protocols. The proposed mechanism is compared with the state-of-the-art work and compared results show the proposed work performs well.

PZT Sensors and their Application in Structural Health Monitoring

2011 ◽  
Vol 128-129 ◽  
pp. 669-675 ◽  
Author(s):  
Xuan Sun
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Lamb Wave ◽  
State Of The Art ◽  
Research Work ◽  
Mechanical Systems ◽  
The State ◽  
Theoretical Studies ◽  
Engineering Systems ◽  
Experimental And Theoretical Studies

This paper provides the state of the art in methods to detect damage in structural and mechanical systems by PZT sensors, which include impedance methods and lamb wave propagations. The basic idea behind these technologies is to use impedance of PZT embedded on surface or lamb wave propagations. A brief overview of research work on experimental and theoretical studies on various structures and mechanical systems is descried. Past, current and applications of this technology in actual engineering systems are summarized. Finally, desirable developments for further advancement of this field are discussed.

Condition Monitoring and Diagnostics of Wind Turbines: A Survey

2014 ◽  
Author(s):  
Paolo Pennacchi ◽  
Pietro Borghesani ◽  
Steven Chatterton ◽  
Candas Gultekin
Keyword(s):  
Wind Energy ◽  
Wind Turbine ◽  
Condition Monitoring ◽  
Wind Turbines ◽  
Failure Modes ◽  
State Of The Art ◽  
The State ◽  
Diagnostic Methods ◽  
System Architectures ◽  
Maintenance Costs

Wind energy conversion is the fastest growing source of electricity generation in the world among the other renewable energy production technologies. Whereas investment costs have decreased over years, operational and maintenance costs of wind turbines are still high, thus attracting the focus of researchers and industrial operators. Classical maintenance techniques, i.e.: run-to-failure and scheduled-preventive maintenance, are still dominant in this sector; however, condition monitoring has gained space in the wind turbine market and new diagnostic methods and techniques are continuously being proposed. Condition monitoring techniques seem the most effective tools to minimize operational and maintenance costs and reduce downtimes by early detection of faults. This paper is aimed at reviewing the state of the art of condition monitoring for horizontal axis wind turbines. After a brief introduction presenting the current trends in the market of wind energy, the paper reviews the most common failure modes of wind turbines and the traditional approach to maintenance. The core of this study details the state of the art in the field of system architectures, sensors and signal processing techniques for the diagnostic of faults in wind turbine components. Finally, some general conclusions are drawn on the overall trends in the field of condition monitoring of wind turbines.

scholarly journals Wearable Health Devices—Vital Sign Monitoring, Systems and Technologies

Sensors ◽  
2018 ◽  
Vol 18 (8) ◽  
pp. 2414 ◽  
Author(s):  
Duarte Dias ◽  
João Paulo Silva Cunha
Keyword(s):  
Vital Sign ◽  
State Of The Art ◽  
Health Assessment ◽  
Vital Signs ◽  
The State ◽  
Blood Oxygen Saturation ◽  
System Architectures ◽  
Fitness Level ◽  
Health Tracking ◽  
Future Challenges

Wearable Health Devices (WHDs) are increasingly helping people to better monitor their health status both at an activity/fitness level for self-health tracking and at a medical level providing more data to clinicians with a potential for earlier diagnostic and guidance of treatment. The technology revolution in the miniaturization of electronic devices is enabling to design more reliable and adaptable wearables, contributing for a world-wide change in the health monitoring approach. In this paper we review important aspects in the WHDs area, listing the state-of-the-art of wearable vital signs sensing technologies plus their system architectures and specifications. A focus on vital signs acquired by WHDs is made: first a discussion about the most important vital signs for health assessment using WHDs is presented and then for each vital sign a description is made concerning its origin and effect on heath, monitoring needs, acquisition methods and WHDs and recent scientific developments on the area (electrocardiogram, heart rate, blood pressure, respiration rate, blood oxygen saturation, blood glucose, skin perspiration, capnography, body temperature, motion evaluation, cardiac implantable devices and ambient parameters). A general WHDs system architecture is presented based on the state-of-the-art. After a global review of WHDs, we zoom in into cardiovascular WHDs, analysing commercial devices and their applicability versus quality, extending this subject to smart t-shirts for medical purposes. Furthermore we present a resumed evolution of these devices based on the prototypes developed along the years. Finally we discuss likely market trends and future challenges for the emerging WHDs area.

Polymeric Integrated Optics

1991 ◽  
Vol 244 ◽  
Author(s):  
Kurt H. Lösch ◽  
Peter Kersten ◽  
Wiltraud Wischmann
Keyword(s):  
Data Processing ◽  
Integrated Optics ◽  
State Of The Art ◽  
Research Work ◽  
The State ◽  
Photonic Circuits ◽  
Practical Applications ◽  
Channel Waveguides

ABSTRACTSince the realization of first polymer channel waveguides in the early 70ths and the market introduction of polymer fibres research work is aiming to increase the integration level of photonic circuits. This paper reports the state of the art in passive and active polymeric integrated optics in view of the requirements for practical applications in telecom and data processing systems.

scholarly journals Application of super absorbent polymers (SAP) in concrete construction—update of RILEM state-of-the-art report

2021 ◽  
Vol 54 (2) ◽  
Author(s):  
Viktor Mechtcherine ◽  
Mateusz Wyrzykowski ◽  
Christof Schröfl ◽  
Didier Snoeck ◽  
Pietro Lura ◽  
...  
Keyword(s):  
State Of The Art ◽  
Research Work ◽  
Major Product ◽  
The State ◽  
Chemical Admixtures ◽  
Cement Based Materials ◽  
International Experts ◽  
Important Progress ◽  
Made In ◽  
Working Mechanisms

AbstractSuperabsorbent polymers (SAP) are a new, promising class of chemical admixtures which offer new possibilities in respect of influencing the properties of cement-based materials in the fresh, hardening, and hardened states. Much research work has been done in the last two decades to set the stage for introducing this truly multipurpose agent into the practice of construction. In particular, three RILEM Technical Committees: 196-ICC, 225-SAP and 260-RSC contributed considerably to the related progress by coordinating and combining the efforts of international experts in the field. The major product of the RILEM TC 225-SAP work was the State-of-the-Art Report published in 2012. This comprehensive document covered all topics relevant to the application of SAP as a concrete admixture. Since then further important progress has been made in understanding the working mechanisms of SAP in concrete and the effects of SAP-addition on various concrete properties. The article at hand presents an update on the state-of-the-art and is the concluding document delivered by the RILEM TC 260-RSC.

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