Transmission Line Resistance Compression Networks and Applications to Wireless Power Transfer
Open Access
- 21 April 2014
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal of Emerging and Selected Topics in Power Electronics
- Vol. 3 (1), 252-260
- https://doi.org/10.1109/jestpe.2014.2319056
Abstract
Microwave-to-dc rectification is valuable in many applications, including RF energy recovery, dc-dc conversion, and wireless power transfer. In such applications, it is desired for the microwave rectifier system to provide a constant RF input impedance. Consequently, variation in rectifier input impedance over varying incident power levels can hurt system performance. To address this challenge, we introduce multiway transmission line resistance compression networks (TLRCNs) for maintaining near-constant input impedance in RF-to-dc rectifier systems. A development of TLRCNs is presented, along with their application to RF-to-dc conversion and wireless power transfer. We derive analytical expressions for the behavior of TLRCNs, and describe two design methodologies applicable to both single and multistage implementations. A 2.45-GHz four-way TLRCN network is implemented and applied to create a 4-W resistance compressed rectifier system that has narrow-range resistive input characteristics over a 10-dB power range. It is demonstrated to improve the impedance match to mostly resistive but variable input impedance class-E rectifiers over a 10-dB power range. The resulting TLRCN plus rectifier system has >50% RF-to-dc conversion efficiency over a >10-dB input power range at 2.45 GHz (peak efficiency 70%), and standing wave ratio <;1.1 over a 7.7-dB range, despite a nonnegligible reactive component in the rectifier loads.Keywords
This publication has 31 references indexed in Scilit:
- Transmission line resistance compression networks for microwave rectifiersPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2014
- High Efficiency Resonant DC/DC Converter Utilizing a Resistance Compression NetworkIEEE Transactions on Power Electronics, 2013
- An Efficient, Watt-Level Microwave Rectifier Using an Impedance Compression Network (ICN) With Applications in Outphasing Energy Recovery SystemsIEEE Microwave and Wireless Components Letters, 2013
- Four-way lossless outphasing and power combining with hybrid microstrip/discrete combiner for microwave power amplificationPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2013
- A transmission line based resistance compression network (TRCN) for microwave applicationsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2013
- Experimental Validation of a Four-Way Outphasing Combiner for Microwave Power AmplificationIEEE Microwave and Wireless Components Letters, 2013
- Low-Power Wireless Power DeliveryIEEE Transactions on Microwave Theory and Techniques, 2012
- A New Power Combining and Outphasing Modulation System for High-Efficiency Power AmplificationIEEE Transactions on Circuits and Systems I: Regular Papers, 2011
- An interdisciplinary effort to develop a wireless embedded sensor system to monitor and assess corrosion in the tendons of prestressed concrete girdersPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2004
- Theoretical and experimental investigation of a rectenna element for microwave power transmissionIEEE Transactions on Microwave Theory and Techniques, 1992