scholarly journals Glass Superstrate Nanoantennas for Infrared Energy Harvesting Applications

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Isa Kocakarin ◽  
Korkut Yegin
Keyword(s):  
Electromagnetic Wave ◽  
Energy Harvesting ◽  
Glass Substrate ◽  
Figure Of Merit ◽  
Superior Performance ◽  
Fractional Bandwidth ◽  
Spiral Antenna ◽  
Antenna Performance ◽  
Half Power ◽  
Peak Gain

Several nanoantennas for infrared energy harvesting applications at 30 THz are studied. Contrary to usual antenna designs, we implemented glass superstrate as opposed to glass substrate for better antenna performance. We defined a figure of merit (FOM) which includes antenna fractional bandwidth, peak gain, and half-power beamwidth of the antenna under consideration. Three different antenna structures with glass superstrate and one of them with glass substrate are studied in detail. According to our FOM definition, the Archimedean balanced spiral antenna exhibited superior performance among other structures with less sensitivity to the incoming polarization of the electromagnetic wave.

scholarly journals Bi-Directional Loop Antenna Array Using Magic Cube Origami

Sensors ◽  
2019 ◽  
Vol 19 (18) ◽  
pp. 3911 ◽  
Author(s):  
Ying Xu ◽  
Yeonju Kim ◽  
Manos M. Tentzeris ◽  
Sungjoon Lim
Keyword(s):  
Antenna Array ◽  
High Mobility ◽  
Beam Width ◽  
Directional Pattern ◽  
Loop Antenna ◽  
Single Antenna ◽  
Antenna Performance ◽  
Magic Cube ◽  
Half Power ◽  
Peak Gain

In this paper, we propose a bi-directional loop antenna array using magic cube origami. The proposed antenna array consists of three one-wavelength loop antenna elements with series feeding. Each loop antenna is realized on a single magic cube, and three cubes are connected in series to form the array. The three cubes can be easily folded and unfolded due to being constructed in the form of a magic cube origami. Antenna volume can be minimized for high mobility by folding the array, which radiates a bi-directional pattern with full volume when unfolded. The proposed antenna was designed at 1.39 GHz. When the single antenna is realized on the single cube, the peak gain is 4.03 dBi. The peak gain increased to 5.2 and 5.53 dBi with two and three antennas, respectively. Half-power beam width (HPBW) with three antenna elements decreased to 40° from 360° compared to the HPBW with the single antenna. The proposed antenna performance was assessed numerically and experimentally.

scholarly journals Electrode and electrolyte configurations for low frequency motion energy harvesting based on reverse electrowetting

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Pashupati R. Adhikari ◽  
Nishat T. Tasneem ◽  
Russell C. Reid ◽  
Ifana Mahbub
Keyword(s):  
Energy Harvesting ◽  
Bias Voltage ◽  
Energy Harvester ◽  
Superior Performance ◽  
Maximum Output ◽  
Electrowetting On Dielectric ◽  
External Bias ◽  
Motion Energy ◽  
Ac Current ◽  
Self Powered

AbstractIncreasing demand for self-powered wearable sensors has spurred an urgent need to develop energy harvesting systems that can reliably and sufficiently power these devices. Within the last decade, reverse electrowetting-on-dielectric (REWOD)-based mechanical motion energy harvesting has been developed, where an electrolyte is modulated (repeatedly squeezed) between two dissimilar electrodes under an externally applied mechanical force to generate an AC current. In this work, we explored various combinations of electrolyte concentrations, dielectrics, and dielectric thicknesses to generate maximum output power employing REWOD energy harvester. With the objective of implementing a fully self-powered wearable sensor, a “zero applied-bias-voltage” approach was adopted. Three different concentrations of sodium chloride aqueous solutions (NaCl-0.1 M, NaCl-0.5 M, and NaCl-1.0 M) were used as electrolytes. Likewise, electrodes were fabricated with three different dielectric thicknesses (100 nm, 150 nm, and 200 nm) of Al2O3 and SiO2 with an additional layer of CYTOP for surface hydrophobicity. The REWOD energy harvester and its electrode–electrolyte layers were modeled using lumped components that include a resistor, a capacitor, and a current source representing the harvester. Without using any external bias voltage, AC current generation with a power density of 53.3 nW/cm2 was demonstrated at an external excitation frequency of 3 Hz with an optimal external load. The experimental results were analytically verified using the derived theoretical model. Superior performance of the harvester in terms of the figure-of-merit comparing previously reported works is demonstrated. The novelty of this work lies in the combination of an analytical modeling method and experimental validation that together can be used to increase the REWOD harvested power extensively without requiring any external bias voltage.

Piezoelectric Energy Harvesting Design Principles for Materials and Structures: Material Figure‐of‐Merit and Self‐Resonance Tuning

2020 ◽  
Vol 32 (51) ◽  
pp. 2002208
Author(s):  
Hyun‐Cheol Song ◽  
Sun‐Woo Kim ◽  
Hyun Soo Kim ◽  
Dong‐Gyu Lee ◽  
Chong‐Yun Kang ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Figure Of Merit ◽  
Design Principles ◽  
Piezoelectric Energy Harvesting ◽  
Piezoelectric Energy ◽  
Resonance Tuning

scholarly journals Antenna Performance Improvement Techniques for Energy Harvesting: A Review Study

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Raed Abdulkareem ◽  
Abdulrashid O. ◽  
Yasir A. ◽  
Mustafa S. ◽  
Rozlan Alias ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Performance Improvement ◽  
Antenna Performance ◽  
Review Study

scholarly journals Multifunctional Partially Reflective Surface for Smart Blocks

Sensors ◽  
2021 ◽  
Vol 21 (19) ◽  
pp. 6508
Author(s):  
Jae Hee Kim ◽  
Dong-Jin Lee ◽  
Tae-Ki An ◽  
Jong-Gyu Hwang ◽  
Chi-Hyung Ahn
Keyword(s):  
High Gain ◽  
Antenna Gain ◽  
High Gain Antenna ◽  
Reflective Surface ◽  
Antenna Performance ◽  
Directional Radiation ◽  
Performance Deterioration ◽  
Polarization Characteristics ◽  
Half Power ◽  
Gain Characteristic

In general, a partially reflective surface (PRS) is mainly used to increase the gain of an antenna; some metallic objects placed on the PRS degrades the antenna performance because the objects change the periodic structure of the PRS. Herein, we propose a multifunctional PRS for smart block application. When a passenger passes over a smart block, the fare can be simultaneously collected and presented through the LED display. This requires high gain antenna with LED structure. The high gain characteristic helps the antenna identify passengers only when they pass over the block. The multifunctional PRS has a structure in which an LED can be placed in the horizontal direction while increasing the antenna gain. We used the antenna’s polarization characteristics to prevent performance deterioration when LED lines are placed in the PRS. We built the proposed antenna and measured its performance: At 2.41 GHz, the efficiency was 81.4%, and the antenna gain was 18.3 dBi. Furthermore, the half-power beamwidth was 18°, confirming a directional radiation pattern.

Log-spiral Antenna Integrated with GaAsSb-base Backward Diodes for Microwave Energy Harvesting

2019 ◽  
Author(s):  
Masaru Sato ◽  
Kenichi Kawaguchi ◽  
Tsuyoshi Takahashi ◽  
Naoya Okamoto ◽  
Tasuku Kurosawa ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Microwave Energy ◽  
Spiral Antenna

scholarly journals Enhanced figure of merit in Pb(Zr,Ti)O3 nanorods for piezoelectric energy harvesting

AIP Advances ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 105101
Author(s):  
Jundong Song ◽  
Tomoaki Yamada ◽  
Kazuki Okamoto ◽  
Masahito Yoshino ◽  
Takanori Nagasaki
Keyword(s):  
Energy Harvesting ◽  
Figure Of Merit ◽  
Piezoelectric Energy Harvesting ◽  
Piezoelectric Energy

A Quantitative Analysis of Kinetic Energy Harvesting for Hybrid Power Supplies

2012 ◽  
Author(s):  
Edwar Romero ◽  
Gerardo Carbajal ◽  
Robert Warrington ◽  
Michael Neuman
Keyword(s):  
Quantitative Analysis ◽  
Energy Harvesting ◽  
Figure Of Merit ◽  
Energy Harvester ◽  
Electronic Devices ◽  
Consumer Electronics ◽  
Power Supplies ◽  
Body Motion ◽  
Battery Life ◽  
Biomedical Monitoring

This study presents a quantitative analysis of experimental data for extracting energy from human body motion and its possibility of powering portable electronic devices, such as consumer electronics or biomedical monitoring sensors. Since portable electronic devices are typically limited by the size and lifespan of batteries, energy harvesting shows potential as alternative for extending battery life. The acceleration was collected experimentally from 10 subjects while walking and running at different velocities on a treadmill. The acceleration results were studied and a figure of merit consisting of the acceleration-squared-to-frequency was found to determine, in addition to the quality factor, as the important factors for optimal energy harvesting. It was determined that from average walking an energy harvester can produce a power output density greater than 1mW/cm3.

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