Design of a ferrite rod antenna for harvesting energy from medium wave broadcast signals

Dyo, Vladimir; Ajmal, Tahmina; Allen, Ben; Jazani, David; Ivanov, I.

doi:10.1049/joe.2013.0126

Cited by 14 publications

(11 citation statements)

References 15 publications

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“…e following papers [27][28][29] also used Mn-Zn cores for energy harvesting under power lines. In addition, the authors in [34,35] used Mn-Zn for other energy harvesters. For the core equivalent resistance R core , there are three losses occurring in the soft magnetic core when it is placed in the alternating magnetic field, including eddy current losses, hysteresis losses, and residual losses.…”

Section: Core Materials Selectionmentioning

confidence: 99%

A Free-Standing Electromagnetic Energy Harvester for Condition Monitoring in Smart Grid

Wang

Shi

Han

2021

Wireless Power Transfer

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Wireless energy harvesting is an effective way to power condition monitoring sensors which are the basis of smart grid. In this paper, a new free-standing I-shaped core is designed to scavenge electromagnetic energy from large alternating current. An I-shaped core can guide more magnetic flux by adding a pair of magnetic flux collector plates at both ends of the rod core. It weakens the core demagnetization field and enables more energy to be collected. Since a magnetic field line can be bent with high-permeability soft magnetic materials, a highly efficient grid-shaped coil is proposed. Compared with the I-shaped coil, its weight is lighter and power density is higher. A Mn-Zn ferrite with high relative permeability and ultralow conductivity can effectively reduce eddy current loss, which proves to be the most suitable material. The measured open circuit voltage agrees well with the theoretical value. The experimental results show that the output power can reach 4.5 mW when the I-shaped coil is placed in a magnetic flux density of 6.5 μTrms. The power density is 7.28 μW/cm3. Therefore, the proposed design can be very effective for supplying condition monitoring sensors.

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Section: Core Materials Selectionmentioning

confidence: 99%

A Free-Standing Electromagnetic Energy Harvester for Condition Monitoring in Smart Grid

Wang

Shi

Han

2021

Wireless Power Transfer

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“…The SEM A electromotive force in a vertical sensor antenna with the height of h = 10 cm may be defined as [13], [14]:…”

Section: E Front Endmentioning

confidence: 99%

“…The coil comprises 900 windings of a 0.1 mm wire. The effective height of the ferrite antenna is [14]:…”

Section: H Field Front Endmentioning

confidence: 99%

Measurement of Electromagnetic Field Component Emissions as a Precursor of Emerging Hazard in Coal Mines

Mydlikowski¹,

Maniak²

2019

JTIT

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The article presents the results of research concerning electromagnetic (EM) field emitted by rocks during the process of their destruction. The paper describes a measuring stand designed for subjecting rock samples to axial crushing. During the destruction of rock samples, both components of the electromagnetic field emitted by the rock were recorded. The paper presents the results of research on hard coal samples, presenting the obtained time domain waveforms and frequency spectrum of the emitted EM field components. Further potential uses of tests concerned with EM emitted by rocks are determined. Applications registering EM field in mine environments may provide an early mine collapse warnings.

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“…In contrast, the proposed approach uses sensors that are autonomous and that opportunistically collect energy from charging stations located in strategic positions, and therefore need to be able to extract and utilize tiny amounts of energy, wherever it is available. The work in [ 23 , 24 ] proposed an RF energy harvesting system that powers low power devices from medium wave radio signals and that can operate forever within relatively large geographical areas, but only in the proximity of a powerful MW radio station. The hybrid approach proposed in this paper however is suitable for any area instrumented by relatively inexpensive and low power custom transmitting stations.…”

Section: Related Workmentioning

confidence: 99%

On the Impact of Mobility on Battery-Less RF Energy Harvesting System Performance

Munir

Dyo

2018

Sensors

Self Cite

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The future of Internet of Things (IoT) envisions billions of sensors integrated with the physical environment. At the same time, recharging and replacing batteries on this infrastructure could result not only in high maintenance costs, but also large amounts of toxic waste due to the need to dispose of old batteries. Recently, battery-free sensor platforms have been developed that use supercapacitors as energy storage, promising maintenance-free and perpetual sensor operation. While prior work focused on supercapacitor characterization, modelling and supercapacitor-aware scheduling, the impact of mobility on capacitor charging and overall sensor application performance has been largely ignored. We show that supercapacitor size is critical for mobile system performance and that selecting an optimal value is not trivial: small capacitors charge quickly and enable the node to operate in low energy environments, but cannot support intensive tasks such as communication or reprogramming; increasing the capacitor size, on the other hand, enables the support for energy-intensive tasks, but may prevent the node from booting at all if the node navigates in a low energy area. The paper investigates this problem and proposes a hybrid storage solution that uses an adaptive learning algorithm to predict the amount of available ambient energy and dynamically switch between two capacitors depending on the environment. The evaluation based on extensive simulations and prototype measurements showed up to 40% and 80% improvement compared to a fixed-capacitor approach in terms of the amount of harvested energy and sensor coverage.

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Design of a ferrite rod antenna for harvesting energy from medium wave broadcast signals

Cited by 14 publications

References 15 publications

A Free-Standing Electromagnetic Energy Harvester for Condition Monitoring in Smart Grid

A Free-Standing Electromagnetic Energy Harvester for Condition Monitoring in Smart Grid

Measurement of Electromagnetic Field Component Emissions as a Precursor of Emerging Hazard in Coal Mines

On the Impact of Mobility on Battery-Less RF Energy Harvesting System Performance

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