An Ultrawideband Microfabricated Gold-Based Antenna Array for Terahertz Communications

2020 ◽  
Author(s):  
Abdoalbaset Abohmra ◽  
Hasan Abbas ◽  
Jalil Kazim ◽  
Muhammad Rabbani ◽  
Chong Li ◽  
...  
Keyword(s):  
Communication Networks ◽  
Energy Efficient ◽  
High Speed ◽  
Coplanar Waveguide ◽  
Microwave Frequency ◽  
Future Generation ◽  
Data Rates ◽  
Terahertz Communications ◽  
High Bandwidth ◽  
The Cost

Abstract The microwave frequency band typically used for wireless communications will soon become saturated and will no longer be able to fulfil the high bandwidth demands of modern communication networks. Terahertz (THz) communication has appeared as a highly attractive, future-generation wireless technology that offers higher spectral bandwidth and, therefore, higher data rates. However, the full exploitation of THz technologies is contingent upon the availability of energy-efficient sources and devices. In this article, we presented a fabrication and measurement of microscale planar inverted cone antenna (PICA) array made of gold. Using an ungrounded coplanar waveguide feed, the microfabricated structure provides a bandwidth of 37.9 % with the resonant frequency of 0.925 THz. Given the cost of microfabrication is reducing substantially with rapid technological advancements, the results of this paper suggest that high-speed THz communications can be realised for widescale applications.

scholarly journals NanoLEDs for energy-efficient and gigahertz-speed spike-based sub-λ neuromorphic nanophotonic computing

Nanophotonics ◽  
2020 ◽  
Vol 9 (13) ◽  
pp. 4149-4162 ◽  
Author(s):  
Bruno Romeira ◽  
José M. L. Figueiredo ◽  
Julien Javaloyes
Keyword(s):  
Neural Networks ◽  
Energy Efficient ◽  
High Speed ◽  
Dynamic Properties ◽  
Optical Computing ◽  
Differential Conductance ◽  
Rate Equations ◽  
Dynamical Equations ◽  
Electrical Modulation ◽  
High Bandwidth

AbstractEvent-activated biological-inspired subwavelength (sub-λ) photonic neural networks are of key importance for future energy-efficient and high-bandwidth artificial intelligence systems. However, a miniaturized light-emitting nanosource for spike-based operation of interest for neuromorphic optical computing is still lacking. In this work, we propose and theoretically analyze a novel nanoscale nanophotonic neuron circuit. It is formed by a quantum resonant tunneling (QRT) nanostructure monolithic integrated into a sub-λ metal-cavity nanolight-emitting diode (nanoLED). The resulting optical nanosource displays a negative differential conductance which controls the all-or-nothing optical spiking response of the nanoLED. Here we demonstrate efficient activation of the spiking response via high-speed nonlinear electrical modulation of the nanoLED. A model that combines the dynamical equations of the circuit which considers the nonlinear voltage-controlled current characteristic, and rate equations that takes into account the Purcell enhancement of the spontaneous emission, is used to provide a theoretical framework to investigate the optical spiking dynamic properties of the neuromorphic nanoLED. We show inhibitory- and excitatory-like optical spikes at multi-gigahertz speeds can be achieved upon receiving exceptionally low (sub-10 mV) synaptic-like electrical activation signals, lower than biological voltages of 100 mV, and with remarkably low energy consumption, in the range of 10–100 fJ per emitted spike. Importantly, the energy per spike is roughly constant and almost independent of the incoming modulating frequency signal, which is markedly different from conventional current modulation schemes. This method of spike generation in neuromorphic nanoLED devices paves the way for sub-λ incoherent neural elements for fast and efficient asynchronous neural computation in photonic spiking neural networks.

The Internet — A New Dimension in University—Industry Collaboration

1997 ◽  
Vol 11 (6) ◽  
pp. 349-354 ◽  
Author(s):  
C. Grant ◽  
T. Scott
Keyword(s):  
Communication Networks ◽  
High Speed ◽  
Advanced Technology ◽  
The Internet ◽  
Industry Collaboration ◽  
Working Together ◽  
Working Day ◽  
Technology And Communication ◽  
The Cost ◽  
University Industry

This paper examines how advanced technology and communication networks are revolutionizing the way university researchers, scientists and industrialists are communicating and working together. In collaborative projects, partners often come from different environments, backgrounds and possibly different regions and countries. Barriers such as geographical remoteness, lack of time in the working day, the cost of travel and differences in culture can seriously hinder regular communication and development work. However the Internet is fast becoming an indispensable international communications tool. It constitutes a resource that is invaluable to the knowledge and technology transfer process. It links over two-thirds of universities and is enabling industry and universities all over the world to develop in new and exciting ways – although there are both opportunities and threats associated with its explosive growth. This paper illustrates how the authors have gained advantage by exploiting current technology to form successful partnerships in this new high-speed ‘no boundaries’ information age.

scholarly journals Discrete-variable quantum key distribution with homodyne detection

Quantum ◽  
2022 ◽  
Vol 6 ◽  
pp. 613
Author(s):  
Ignatius William Primaatmaja ◽  
Cassey Crystania Liang ◽  
Gong Zhang ◽  
Jing Yan Haw ◽  
Chao Wang ◽  
...  
Keyword(s):  
Quantum Key Distribution ◽  
High Speed ◽  
Cost Effective ◽  
Key Distribution ◽  
Continuous Variable ◽  
Discrete Variable ◽  
Quantum State Preparation ◽  
High Bandwidth ◽  
The Cost ◽  
Selection Of

Most quantum key distribution (QKD) protocols can be classified as either a discrete-variable (DV) protocol or continuous-variable (CV) protocol, based on how classical information is being encoded. We propose a protocol that combines the best of both worlds – the simplicity of quantum state preparation in DV-QKD together with the cost-effective and high-bandwidth of homodyne detectors used in CV-QKD. Our proposed protocol has two highly practical features: (1) it does not require the honest parties to share the same reference phase (as required in CV-QKD) and (2) the selection of decoding basis can be performed after measurement. We also prove the security of the proposed protocol in the asymptotic limit under the assumption of collective attacks. Our simulation suggests that the protocol is suitable for secure and high-speed practical key distribution over metropolitan distances.

High Speed Serial Interfaces in 2.5D Integrated Systems

2016 ◽  
Vol 2016 (1) ◽  
pp. 000155-000159 ◽  
Author(s):  
Muhammad Waqas Chaudhary ◽  
Andy Heinig
Keyword(s):  
High Speed ◽  
Serial Communication ◽  
Integrated Systems ◽  
Electromagnetic Simulation ◽  
Measurement Equipment ◽  
Data Sampling ◽  
High Data ◽  
Data Rates ◽  
Simulation Based ◽  
High Bandwidth

Abstract High speed communication has been a topic of great interest in the last decade due to excessively high data rates required between chips especially pushed by the measurement equipment industry to support extremely high bandwidth data sampling. Serial communication is chosen to support these data rates which are pushing further and further into higher data rate regimes. It is important to understand how the 2.5D integration of chips on the interposer can support serial communication and what the designer can do to leverage the special features of interposer channel to achieve lower power and higher speed. This paper will present the interposer complete channel full 3D Electromagnetic simulation based model extraction. It also presents the simulation of channel with real serial communication transmitter and receiver circuit models to describe the proposed interposer performance for multi Gb/s data rates. Also a comparison is shown for different settings of transmitter and receiver circuits under the interposer channel.

scholarly journals PR_30 Towards Programmable Optical Network Front-end Devices Using Silicon Photonics (1525090-PO)

2022 ◽  
Author(s):  
Shayan Mookherjee
Keyword(s):  
Communication Networks ◽  
Silicon Photonics ◽  
Energy Efficient ◽  
National Science Foundation ◽  
Optical Network ◽  
Project Outcomes ◽  
Energy Efficient Communication ◽  
Efficient Communication ◽  
National Science ◽  
High Bandwidth

We study how the performance and utility of high-bandwidth, energy-efficient communication networks can be improved by enabling programmability and user-defined tunability in the optical front-ends using silicon photonics. Summary of a Project Outcomes report of research funded by the U.S. National Science Foundation under Project Number 1525090 (Year 1).

scholarly journals Review on Free Space Optics

2013 ◽  
Vol 8 (1) ◽  
pp. 734-742 ◽  
Author(s):  
Er. Rajeev Thakur ◽  
Er. Sukhbir Singh ◽  
Er. Abhishek Sharma
Keyword(s):  
Free Space ◽  
High Speed ◽  
Free Space Optics ◽  
High Data ◽  
Space Optics ◽  
Free Spectrum ◽  
Data Rates ◽  
High Bandwidth ◽  
Bottle Neck ◽  
High Data Rates

Present era demands high bandwidth with high data rates especially for internet. For high data rates requires high speed transmission medium like optical fiber. To overcome the bottle neck of last mile communication free space optics has emerged as a better option for radio engineers. Using Infrared beams provides license free spectrum, high bandwidth with maximum data rates. In this paper different aspects for utilizing an FSO link are reviewed showing there advantages and disadvantages. 

scholarly journals A Complete EGSE Solution for the SpaceWire and SpaceFibre Protocol Based on the PXI Industry Standard

Sensors ◽  
2019 ◽  
Vol 19 (22) ◽  
pp. 5013 ◽  
Author(s):  
Luca Dello Dello Sterpaio ◽  
Antonino Marino ◽  
Pietro Nannipieri ◽  
Gianmarco Dinelli ◽  
Daniele Davalle ◽  
...  
Keyword(s):  
High Speed ◽  
Application Programming Interface ◽  
Future Generation ◽  
Test Equipment ◽  
Industry Standard ◽  
Data Rates ◽  
Complete Test ◽  
Star Tracking ◽  
Programmable Devices ◽  
Tracking Devices

This article presents a complete test equipment for the promising on-board serial high-speed SpaceFibre protocol, published by the European Committee for Space Standardization. SpaceFibre and SpaceWire are standard communication protocols for the latest technology sensor devices intended for on-board satellites and spacecrafts in general, especially for sensors based on image acquisition, such as scanning radiometers or star-tracking devices. The new design aims to provide the enabling tools to the scientific community and the space industry in order to promote the adoption of open standards in space on-board communications for current- and future-generation spacecraft missions. It is the first instrument expressly designed for LabVIEW users, and it offers tools and advanced features for the test and development of new SpaceFibre devices. In addition, it supports the previous SpaceWire standard and cross-communications. Thanks to novel cutting-edge design methods, the system complex architecture can be implemented on natively supported LabVIEW programmable devices. The presented system is highly customizable in terms of interface support and is provided with a companion LabVIEW application and LabVIEW Application Programming Interface (API) for user custom automated test-chains. It offers real-time capabilities and supports data rates up to 6.25 Gbps.The proposed solutions is then fairly compared with other currently available SpaceFibre test equipment. Its comprehensiveness and modularity make it suitable for either on-board device developments or spacecraft system integrations.

High-Speed Light Sources in High-Speed Optical Passive Local Area Communication Networks

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
IS Amiri ◽  
Ahmed Nabih Zaki Rashed ◽  
P Yupapin
Keyword(s):  
Communication Networks ◽  
High Speed ◽  
Network Performance ◽  
Optical Filters ◽  
Local Area ◽  
Optical Amplifier ◽  
Error Rates ◽  
Measured Signal ◽  
Light Sources ◽  
Data Rates

AbstractThis study outlines the high-speed light sources in high-speed passive optical local area communication networks. Directly modulated laser measured is selected as a light source for data rate transfer of 40 Gb/s for propagation range up to 20 km. Optical output power after fiber-optic cable is measured. Signal power amplitude, Q-factor, and data error rates after the receive side are also measured. Hybrid optical amplifier, optical filters, and electrical filters are used for upgrading the network performance operation efficiency. The study assured that the optical communication network can be extended to 20 km distance with data rates of 40 Gb/s with achieving maximum Q-factor of 14.98 and minimum data rates of 3.55 ×10–51.

scholarly journals Atmospheric pressure air microplasma current time series for true random bit generation

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Anis Allagui ◽  
Sohaib Majzoub ◽  
Ahmed S. Elwakil ◽  
Andrea Espinel Rojas ◽  
Hussain Alawadhi
Keyword(s):  
Time Series ◽  
Atmospheric Pressure ◽  
High Speed ◽  
Electrical Current ◽  
Current Time ◽  
High Data ◽  
Deterministic Algorithms ◽  
Data Rates ◽  
Promising Solution ◽  
The Cost

AbstractGenerating true random bits of high quality at high data rates is usually viewed as a challenging task. To do so, physical sources of entropy with wide bandwidth are required which are able to provide truly random bits and not pseudorandom bits, as it is the case with deterministic algorithms and chaotic systems. In this work we demonstrate a reliable high-speed true random bit generator (TRBG) device based on the unpredictable electrical current time series of atmospheric pressure air microplasma (APAMP). After binarization of the sampled current time series, no further post-processing was needed in order for the bitstreams to pass all 15 tests of the NIST SP 800-22 statistical test suite. Several configurations of the system have been successfully tested at different sampling rates up to 100 MS/s, and with different inter-electrode distances giving visible/non-visible optical emissions. The cost-effectiveness, simplicity and ease of implementation of the proposed APAMP system compared to others makes it a very promising solution for portable TRBGs.

scholarly journals Passive Equalization Networks—Efficient Synthesis Approach for High-Speed Signal Integrity Characterization

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1222
Author(s):  
Diana Brinaru
Keyword(s):  
High Speed ◽  
Constant Input ◽  
Microstrip Technology ◽  
Eye Diagram ◽  
High Attenuation ◽  
High Data ◽  
Filter Synthesis ◽  
Data Rates ◽  
New Variant ◽  
The Cost

High data rates challenges and long traces from current state-of-the-art systems imply high attenuation. In the present article, we will present a detailed process of synthesis of equalizers, for choosing the correct one for a given application. The methods are based on scattering parameters applied on interconnections modeled as microstrip or stripline. Firstly, one may have an overview of types of equalizers, passive, active, and adaptive ones, and a detailed filter synthesis is applied in microwave systems having as start point the insertion loss of a given trace on a given substrate. Next, time domain analyses offer a better understanding of the performance of the interconnect, based on eye diagram inspection and the variation of waveforms with time. Finally, we will present results based on simulation of the equalizers network in a microstrip technology followed by discussions and conclusions. The study proposes to use equalizers in either the transmitter or receiver point, proposes a bridge equalizer with the cost of additional elements but improved constant input, output impedance, and also a new variant for single ended trace based on microwave resonator is proposed. Performance is demonstrated by results from simulations.

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