Impedance optimization of wireless electromagnetic energy harvesters for maximum output efficiency at µW input power

Antwi Nimo; Dario Grgic; Leonhard M. Reindl

doi:10.1117/12.914778

27 March 2012 Impedance optimization of wireless electromagnetic energy harvester for maximum output efficiency at μW input power

Antwi Nimo, Dario Grgic, Leonhard M. Reindl

Author Affiliations +

Proceedings Volume 8341, Active and Passive Smart Structures and Integrated Systems 2012; 83410W (2012) https://doi.org/10.1117/12.914778
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2012, San Diego, California, United States

Abstract

This work presents the optimization of radio frequency (RF) to direct current (DC) circuits using Schottky diodes for remote wireless energy harvesting applications. Since different applications require different wireless RF to DC circuits, RF harvesters are presented for different applications. Analytical parameters influencing the sensitivity and efficiency of the circuits are presented. Results showed in this report are analytical, simulated and measured. The presented circuits operate around the frequency 434 MHz. The result of an L-matched RF to DC circuit operates at a maximum efficiency of 27 % at -35 dBm input. The result of a voltage multiplier achieves an open circuit voltage of 6 V at 0 dBm input. The result of a broadband circuit with a frequency band of 300 MHz, achieves an average efficiency of 5 % at -30 dBm and open circuit voltage of 47 mV. A high quality factor (Q) circuit is also realized with a PI network matching for narrow band applications.

Citation Download Citation

Antwi Nimo, Dario Grgic, and Leonhard M. Reindl "Impedance optimization of wireless electromagnetic energy harvester for maximum output efficiency at μW input power", Proc. SPIE 8341, Active and Passive Smart Structures and Integrated Systems 2012, 83410W (27 March 2012); https://doi.org/10.1117/12.914778

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available