scholarly journals A miniaturized ultrawideband Archimedean spiral antenna for low‐power sensor applications in energy harvesting

2018 ◽  
Vol 61 (1) ◽  
pp. 211-216 ◽  
Author(s):  
Antonio Alex‐Amor ◽  
Pablo Padilla ◽  
José M. Fernández‐González ◽  
Manuel Sierra‐Castañer
Keyword(s):  
Energy Harvesting ◽  
Low Power ◽  
Spiral Antenna ◽  
Archimedean Spiral ◽  
Sensor Applications ◽  
Power Sensor

scholarly journals RF Energy Harvesting System Based on an Archimedean Spiral Antenna for Low-Power Sensor Applications

Sensors ◽  
2019 ◽  
Vol 19 (6) ◽  
pp. 1318 ◽  
Author(s):  
Antonio Alex-Amor ◽  
Ángel Palomares-Caballero ◽  
José Fernández-González ◽  
Pablo Padilla ◽  
David Marcos ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Low Power ◽  
Power Level ◽  
Storage Capacitor ◽  
Spiral Antenna ◽  
Archimedean Spiral ◽  
Rf Energy Harvesting ◽  
Correct Operation ◽  
Energy Harvesting System ◽  
Rf Energy

This paper presents a radiofrequency (RF) energy harvesting system based on an ultrawideband Archimedean spiral antenna and a half-wave Cockcroft-Walton multiplier circuit. The antenna was proved to operate from 350 MHz to 16 GHz with an outstanding performance. With its use, radio spectrum measurements were carried out at the Telecommunication Engineering School (Universidad Politécnica de Madrid) to determine the power level of the ambient signals in two different scenarios: indoors and outdoors. Based on these measurements, a Cockcroft-Walton multiplier and a lumped element matching network are designed to operate at 800 MHz and 900 MHz frequency bands. To correct the frequency displacement in the circuit, a circuit model is presented that takes into account the different parasitic elements of the components and the PCB. With an input power of 0 dBm, the manufactured circuit shows a rectifying efficiency of 30%. Finally, a test is carried out with the full RF energy harvesting system to check its correct operation. Thus, the RF system is placed in front of a transmitting Vivaldi antenna at a distance of 50 cm. The storage capacitor has a charge of over 1.25 V, which is enough to run a temperature sensor placed as the load to be supplied. This demonstrates the validity of the RF energy harvesting system for low-power practical applications.

A ΔΣ ADC for low power sensor applications

2010 ◽  
Author(s):  
Jarno Salomaa ◽  
Mikail Yucetas ◽  
Antti Kalanti ◽  
Lasse Aaltonen ◽  
Kari Halonen
Keyword(s):  
Low Power ◽  
Sensor Applications ◽  
Power Sensor

Enhanced Energy Harvesting from Piezoceramic Using Hybrid Stimulations

2016 ◽  
Vol 848 ◽  
pp. 205-209 ◽  
Author(s):  
Bin Zhang ◽  
Benjamin Ducharne ◽  
Jun Gao
Keyword(s):  
Energy Harvesting ◽  
Power Consumption ◽  
Low Power ◽  
Potential Method ◽  
Induced Polarization ◽  
Low Power Consumption ◽  
Current Amplifier ◽  
Sensor Applications ◽  
Stimulation Method ◽  
A Current

Energy harvesting from ambient environment vibration is a potential method to supply the low-power consumption devices. This paper demonstrates a new method to proceed energy harvesting using a piezoceramic. Both the mechanical and electrical excitations (hybrid stimulation) have been exerted on a piezoceramic. Current was measured though a current amplifier to calculate the induced polarization. By comparing the hybrid stimulation and the pure mechanical one, it can be found that the hybrid stimulation method enable to amplifier the harvested energy, which is promising to be used in energy harvesting and sensor applications.

Ultra-low power incremental delta-sigma ADC for energy harvesting sensor applications

2017 ◽  
Vol 92 (3) ◽  
pp. 369-382 ◽  
Author(s):  
Jarno Salomaa ◽  
Shiva Jamali-Zavareh ◽  
Mika Pulkkinen ◽  
Shailesh Singh Chouhan ◽  
Kari Halonen
Keyword(s):  
Energy Harvesting ◽  
Low Power ◽  
Ultra Low Power ◽  
Sensor Applications ◽  
Delta Sigma

scholarly journals Performance Evaluation of Thermoelectric Energy Harvesting System on Operating Rolling Stock

Micromachines ◽  
2018 ◽  
Vol 9 (7) ◽  
pp. 359 ◽  
Author(s):  
Dahoon Ahn ◽  
Kyungwho Choi
Keyword(s):  
Energy Harvesting ◽  
Low Power ◽  
High Speed ◽  
Waste Heat ◽  
Rolling Stock ◽  
Maximum Speed ◽  
Thermoelectric Energy ◽  
Thermoelectric Energy Harvesting ◽  
Energy Harvesting System ◽  
Power Sensor

During rolling stock operation, various kinds of energy such as vibration, heat, and train-induced wind are dissipated. The amount of energy dissipation cannot be overlooked when a heavy railroad vehicle operates at high speed. Therefore, if the wasted energy is effectively harvested, it can be used to power components like low power sensor nodes. This study aims to review a method of collecting waste heat, caused by the axle bearing of bogie in a rolling stock. A thermoelectric module (TEM) was used to convert the temperature gradient between the surface of the axle bearing housing and the outdoor air into electric energy. In this study, the output performance by temperature difference in the TEM was lab-tested and maximized by computational fluid analysis of the cooling fins. The optimized thermoelectric energy harvesting system (TEHS) was designed and applied on a rolling stock to analyze the power-generating performance under operation. When the rolling stock was operated for approximately 57 min including an interval of maximum speed of 300 km/h, the maximum open circuit voltage was measured at approximately 0.4 V. Based on this study, the system is expected to be utilized as a self-powered independent monitoring system if applied to a low-power sensor node in the future.

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