Next Article in Journal
Dynamic Assessment of Masonry Towers Based on Terrestrial Radar Interferometer and Accelerometers
Previous Article in Journal
A Multi-Feature and Multi-Level Matching Algorithm Using Aerial Image and AIS for Vessel Identification
Open AccessArticle

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

1
Departamento de Lenguajes y Ciencias de la Información, Universidad de Málaga, Málaga 29071, Spain
2
Information Processing and Telecommunications Center, Universidad Politécnica de Madrid, Madrid 28040, Spain
3
Departamento de Teoría de la Señal, Telemática y Comunicaciones, Universidad de Granada, Granada 18071, Spain
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(6), 1318; https://doi.org/10.3390/s19061318
Received: 14 February 2019 / Revised: 4 March 2019 / Accepted: 13 March 2019 / Published: 16 March 2019
(This article belongs to the Section Physical Sensors)
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. View Full-Text
Keywords: energy harvesting; Archimedean spiral antenna; Cockcroft-Walton multiplier; parasitic elements modeling; energy storage energy harvesting; Archimedean spiral antenna; Cockcroft-Walton multiplier; parasitic elements modeling; energy storage
Show Figures

Figure 1

MDPI and ACS Style

Alex-Amor, A.; Palomares-Caballero, Á.; Fernández-González, J.M.; Padilla, P.; Marcos, D.; Sierra-Castañer, M.; Esteban, J. RF Energy Harvesting System Based on an Archimedean Spiral Antenna for Low-Power Sensor Applications. Sensors 2019, 19, 1318.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop