An Octave Bandwidth RF Harvesting Tee-Shirt

This paper presents 16 and 81-element broadband rectenna arrays screen printed on a cotton tee-shirt for harvesting 4-130 \mu \mathrm{W}/\text{cm}^{2} power densities between 2-4 GHz. The antenna is a self-complementary tightly-coupled bow-tie array with a period of about \lambda_{\mathrm{O}}/6 at t...

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Bibliographic Details
Main Authors: Antonio Estrada, Jose, Kwiatkowski, Eric, Lopez-Yela, Ana, Borgonos-Garcia, Monica, Segovia-Vargas, Daniel, Barton, Taylor, Popovic, Zoya
Format: Conference Proceeding
Language:English
Subjects:
energy harvesting
Rectenna
Schottky
screen printed
tee-shirt
wearable
Online Access:Request full text
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Summary:This paper presents 16 and 81-element broadband rectenna arrays screen printed on a cotton tee-shirt for harvesting 4-130 \mu \mathrm{W}/\text{cm}^{2} power densities between 2-4 GHz. The antenna is a self-complementary tightly-coupled bow-tie array with a period of about \lambda_{\mathrm{O}}/6 at the highest frequency. Each array element feed is connected to a packaged Schottky diode using silver paint. Full-wave antenna simulations are performed with specific tissue electrical parameters for the torso, as well as for a body phantom. The diodes impedance as a function of dc load and input power density is analyzed using source-pull harmonic-balance simulations. Measurements using a water-filled phantom show up to \mathrm{P}_{\text{DC}=}10 \mu\mathrm{W} for incident power densities of 4 \mu\mathrm{W}/\text{cm}^{2} at the center of the band, with a DC load of \mathrm{R}_{\text{DC}}=2\mathrm{k}\Omega .
ISSN:2573-7651
DOI:10.1109/WPTC45513.2019.9055642