scholarly journals Modelling and Design of HF RFID Passive Transponders with Additional Energy Harvester

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Piotr Jankowski-Mihułowicz ◽  
Włodzimierz Kalita ◽  
Mariusz Skoczylas ◽  
Mariusz Węglarski
Keyword(s):  
Electromagnetic Field ◽  
Energy Harvester ◽  
Communication Process ◽  
Electronic Circuits ◽  
Radio Communication ◽  
Additional Energy ◽  
Power Load ◽  
Passive Transponders ◽  
Proper Operation ◽  
Load Impact

The huge progress in electronics technology and RFID technique gives the opportunity to implement additional features in transponders. It should be noted that either passive or semipassive transponders are supplied with energy that is derived from the electromagnetic field generated by the read/write device and its antenna. This power source is used to conduct radio-communication process and excess energy could be used to power the extra electronic circuits, but the problem is to determine the additional power load impact on the RFID system proper operation and size of interrogation zone. The ability to power the supplementary electronic blocks applied in the HF passive transponders is discussed in detail this paper. The simulation model and test samples with a harvester that recovers energy from the electromagnetic field of read/write device and its antenna have been developed in order to conduct investigations. The harvested energy has been utilized to supply a microprocessor acquisition block for LTCC pressure sensor developed in research previously described by authors.

PROCEDURE FOR ESTIMATING THE BOUNDARY DISTANCE OF SHORE RADIO STATIONS IN VHF RANGE FOR THE SHORE-TO-SHIP DIRECTION

2021 ◽  
Author(s):  
М.Б. ПРОЦЕНКО ◽  
В.В. ГРОМОЗДИН ◽  
М.С. КОЗУБ
Keyword(s):  
Electromagnetic Field ◽  
Field Strength ◽  
Radio Communication ◽  
Radio Stations ◽  
Noise Environment ◽  
Electromagnetic Field Strength ◽  
Radio Equipment ◽  
Boundary Distance

Сформулирована и детализирована методика оценивания граничной дальности береговых ОВЧ радиостанций в направлении Берег-Судно, которая основана на зависимостях напряженности поля, полученных эмпирическим путем. Определены численные значения граничной дальности ОВЧ радиосвязи применительно к типовому судовому радиооборудованию и шумовой обстановке вблизи судовой антенны. Проведена оценка максимальных допусков определения граничной дальности ОВЧ радиосвязи. The procedure for estimating the boundary distance of the shore VHF radio stations in the shore-to-ship direction, which is based on the dependences of the electromagnetic field strength obtained empirically, has been formulated and detailed. Numerical values of the boundary distance of VHF radio communication in relation to typical ship radio equipment and the noise environment near the ship's antenna are determined. The estimation of the maximum tolerances for determining the boundary distance of VHF radio communication is carried out.

scholarly journals Use Ultra-Wideband Discone Rectenna for Broadband RF Energy Harvesting Applications

Technologies ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 21 ◽  
Author(s):  
Manolis G. Tampouratzis ◽  
Demosthenes Vouyioukas ◽  
Dimitrios Stratakis ◽  
Traianos Yioultsis
Keyword(s):  
Electromagnetic Field ◽  
Urban Environment ◽  
Energy Harvester ◽  
Ultra Wideband ◽  
Broadband Radio ◽  
Rf Energy ◽  
Short Time ◽  
Storage Energy ◽  
Energy Element ◽  
Rf Energy Harvester

In this study, a broadband Radio Frequency (RF) energy harvester implementation is presented. The system uses a broadband discone antenna, which can operate efficiently in a broad frequency spectrum, including LTE, DCS 1800 and UMTS 2100 cellular frequency bands. The system is able to harvest energy from various electromagnetic field sources, thus has the potential to efficiently charge a storage energy element in a short time. The prototype broadband RF energy harvester was tested in the laboratory and also in a typical urban environment.

scholarly journals Using of New Narrowband Waveforms to Ensure Proper Operation of Command and Communication Systems

2018 ◽  
Vol 215 (4) ◽  
pp. 47-61
Author(s):  
Robert Matyszkiel ◽  
Bogusław Grochowina ◽  
Adam Dobkowski ◽  
Marcin Wiśniewski ◽  
Paweł Domaros
Keyword(s):  
High Frequency ◽  
Communication Systems ◽  
Radio Communication ◽  
Very High Frequency ◽  
Communication Devices ◽  
Working Groups ◽  
Basic Services ◽  
Radio Systems ◽  
Services Implementation ◽  
Proper Operation

Abstract Accomplishment of basic services implementation with specific quality is one of the main challenges of the command and communication systems for modern maritime safety and defense. The specificity of the marine environment imposes the use of narrowband HF (High Frequency) and VHF (Very High Frequency) radio communication devices which are capable to implement IP transmission. This paper presents the requirements for the HF and VHF radio systems according to the IP protocol requirements. At the beginning basic properties of narrowband HF and VHF waveforms in context of their operational scenarios has been described. Then results of experimental research (implementation of narrowband services — voice and data) has been presented. Finally further research directions with contribution of the authors, in NATO working groups related to the development of NBWF (Narrowband Waveform) for coalition communication has been presented.

scholarly journals Stabilisation of the high-energy orbit for a non-linear energy harvester with variable damping

2015 ◽  
Vol 230 (12) ◽  
pp. 2003-2012 ◽  
Author(s):  
Dongxu Su ◽  
Rencheng Zheng ◽  
Kimihiko Nakano ◽  
Matthew P Cartmell
Keyword(s):  
Energy Harvesting ◽  
Energy Harvester ◽  
High Energy ◽  
Low Energy ◽  
Additional Energy ◽  
Non Linear ◽  
In Series ◽  
Improved Performance ◽  
Non Linear Oscillator ◽  
Energy Orbit

The non-linearity of a hardening-type oscillator provides a wider bandwidth and a higher energy harvesting capability under harmonic excitations. Also, both low- and high-energy responses can coexist for the same parameter combinations at relatively high excitation levels. However, if the oscillator’s response happens to coincide with the low-energy orbit then the improved performance achieved by the non-linear oscillator over that of its linear counterpart, could be impaired. This is therefore the main motivation for stabilisation of the high-energy orbit. In the present work, a schematic harvester design is considered consisting of a mass supported by two linear springs connected in series, each with a parallel damper, and a third-order non-linear spring. The equivalent linear stiffness and damping coefficients of the oscillator are derived through variation of the damper element. From this adjustment the variation of the equivalent stiffness generates a corresponding shift in the frequency–amplitude response curve, and this triggers a jump from the low-energy orbit to stabilise the high-energy orbit. This approach has been seen to require little additional energy supply for the adjustment and stabilisation, compared with that needed for direct stiffness tuning by mechanical means. Overall energy saving is of particular importance for energy harvesting applications. Subsequent results from simulation and experimentation confirm that the proposed method can be used to trigger a jump to the desirable state, thereby introducing a beneficial addition to the performance of the non-linear hardening-type energy harvester that improves overall efficiency and broadens the bandwidth.

Electricity and Electronics for Clinical Neurophysiology

2009 ◽  
pp. 5-20 ◽  
Author(s):  
Terrence D. Lagerlund
Keyword(s):  
Clinical Neurophysiology ◽  
Simple Circuit ◽  
Electronic Circuits ◽  
Complete Understanding ◽  
Basic Principles ◽  
Proper Operation

This chapter reviews the basic principles of electric and electronic circuits that are important to clinical neurophysiology. Knowledge of these basic principles and how to solve simple circuit problems is necessary for a complete understanding of the proper operation of equipment used in clinical neurophysiology and of the terminology and specifications given in equipment manuals.

scholarly journals Energy Harvesting from the Stray Electromagnetic Field around the Electrical Power Cable for Smart Grid Applications

2016 ◽  
Vol 2016 ◽  
pp. 1-20 ◽  
Author(s):  
Farid Ullah Khan
Keyword(s):  
Electromagnetic Field ◽  
Energy Harvester ◽  
Electrical Power ◽  
Power Line ◽  
Power Cable ◽  
Solid Core ◽  
Wireless Sensor Node ◽  
Super Capacitor ◽  
Energy Harvesters ◽  
Steel Core

For wireless sensor node (WSN) applications, this paper presents the harvesting of energy from the stray electromagnetic field around an electrical power line. Inductive and capacitive types of electrodynamic energy harvesters are developed and reported. For the produced energy harvesters, solid core and split-core designs are adopted. The inductive energy harvester comprises a copper wound coil which is produced on a mild steel core. However, the capacitive prototypes comprise parallel, annular discs separated by Teflon spacers. Moreover, for the inductive energy harvesters’ wound coil and core, the parametric analysis is also performed. A Teflon housing is incorporated to protect the energy harvester prototypes from the harsh environmental conditions. Among the inductive energy harvesters, prototype-5 has performed better than the other harvesters and produces a maximum rms voltage of 908 mV at the current level of 155 A in the power line. However, at the same current flow, the capacitive energy harvesters produce a maximum rms voltage of 180 mV. The alternating output of the prototype-5 is rectified, and a super capacitor (1 F, 5.5 V) and rechargeable battery (Nickel-Cadmium, 3.8 V) are charged with it. Moreover, with the utilization of a prototype-5, a self-powered wireless temperature sensing and monitoring system for an electrical transformer is also developed and successfully implemented.

scholarly journals OPTIMALISASI HMI SCADA UNTUK MONITORING DAN KONTROL REPEATER RADIO KOMUNIKASI MENGGUNAKAN MODEM GPRS INTEK J65i-X

2014 ◽  
Vol 18 (1) ◽  
pp. 27
Author(s):  
Al Anamila Nur Aufa ◽  
Teguh Yuwono
Keyword(s):  
Real Time ◽  
Radio Signal ◽  
Supply Voltage ◽  
The State ◽  
Communication Process ◽  
Monitoring And Control ◽  
Radio Communication ◽  
Radio Communications ◽  
Central Java ◽  
And Control

Al Anamila Nur Aufa, Teguh Yuwono, in paper SCADA HMI optimization for monitoring and control repeater using radio communication modem GPRS INTEK J65i–X explain that radio communications at PT PLN ( Persero ) APD Central Java and Yogyakarta is still a major communication medium for coordinating the work , both maintenance and handling of interference between units . Repeaters in this case an important role in the communication process between APD dispatcher JTY with Area - Area and officers in the field because of the presence of the communication range of the repeater spacing becomes wider . In operation repeaters can be susceptible to interference that can result in radio communications in the areas covered by the repeater to be disrupted so that the communication between the dispatcher APD JTY with Area - Area and field workers to be blocked. Handling repeater for this disorder is not maximized due to the lack of real time monitoring of the state of the repeater , so that when the repeater impaired in the device or on the supply , the clerk did not know in person and just waiting for a report from the repeater keeper at any time at the shelter is not a repeater . There needs to be a device that can monitor the state of the repeater , which if detected interference at the source , supply and radio , PPE JTY officer may direct monitoring , so that it can assist in the handling and analysis of causes of hearing disorders without having to come to the site . GPRS Modem Utilization Intek J65i - X allows retrieval status of the repeater equipment where it can not be done at this time . With facilities tapped digital inputs and digital outputs on the modem , any condition of equipments such as radio signal repeater RX , TX radio signal , battery , charger and 220V supply state of the supply voltage can be detected . From changes in the supply voltage available , can be detected by a GPRS modem Intek J65i - X so that when there is an interruption in the HMI SCADA can termonitoring in real time . With the monitoring and control of a radio repeater communications , personnel no longer need to go to the location (site ) only to find the cause of the disturbance . Interference analysis can also be performed before treatment is held further disruption . Reset control radio can also be done quickly if the radio have to hang in its operation , so that the future will be able to improve the performance of SCADA systems PT PLN ( Persero ) APD Central Java and DI Yogyakarta. Keywords : repeater , modem GPRS Intek J65i - X , auxiliary relays , monitoring and control , HMI SCADA

Effects of the Controller-to-Pilot Data Link (Datalink) on Crew Communication

2002 ◽  
Vol 46 (1) ◽  
pp. 61-65 ◽  
Author(s):  
Craig M. Harvey ◽  
Mike Reynolds ◽  
Andrea L. Pacley ◽  
Richard J. Koubek ◽  
Albert J. Rehmann
Keyword(s):  
New Technology ◽  
Federal Aviation Administration ◽  
Communication Process ◽  
Radio Communication ◽  
Data Link ◽  
Air Traffic Controller ◽  
Radio Communications ◽  
Pilot Data ◽  
The Impact ◽  
Flight Deck

This paper discusses a Federal Aviation Administration (FAA) manned simulation study that investigated the effects of Controller-to-Pilot Data Link (datalink) on crew communications. Professional pilots participated in high fidelity simulation tests where crews received Air Traffic Controller (ATC) messages through the datalink. The results were compared to a similar study conducted where crews only communicated by radio to controllers. Results demonstrate that the nature of crew communications within the flight deck do change because of datalink. Unlike in the past where crews became aware of ATC communications at the same time through their headsets, new communication types are now needed due to the shift from ATC radio communications to ATC datalink messages. Thus flight crews must keep each other aware of information passed through the datalink. The frequency of communication was found to be significantly different depending on the location of the datalink on the flight deck. In addition, datalink crews experienced significantly less ATC radio transmissions as expected; however, the within crew communication related to datalink increased. When within crew datalink communication and the ATC radio communication are combined, one finds that ATC related communication is significantly higher in datalink crews as compared to traditional radio crews. This study illustrates the need to fully evaluate the impact new technology has on flight crews and their communication process.

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