Optimized rectenna design

Visser Hubregt J.; Keyrouz Shady; Smolders A. B.; Visser Hubregt J.; Keyrouz Shady; Smolders A. B.

doi:10.1017/wpt.2014.14

2015 Volume 2

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Optimized rectenna design

1.
Holst Centre/imec, PO Box 8550, Eindhoven 5605 KN, The Netherlands
2.
Faculty of Electrical Engineering, Eindhoven University of Technology, PO Box 513, MB Eindhoven 5600, The Netherlands

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Author Bio:
Hubregt J. Visser received the M.Sc. degree in Electrical Engineering from Eindhoven University of Technology (TU/e), The Netherlands, in 1989. In 1990, he joined TNO Physics and Electronics Laboratory, The Hague, The Netherlands. He has participated in several projects concerning near-field antenna measurements, monolithic microwave integrated circuits design, and phased-array antenna design. In 2001 he joined TNO Science and Industry, Eindhoven, The Netherlands where he has been involved in antenna miniaturization projects. In 2009, he joined the Holst Centre as an employee of Imec working on wireless energy transfer. In 2009, he obtained a Ph.D. degree from Eindhoven University of Technology, The Netherlands and Katholieke Universiteit Leuven, Belgium. In 2014, he was appointed as professor at TU/e. Hubregt is the author of the books "Array and Phased Array Antenna Basics" (Wiley, 2005), "Approximate Antenna Analysis for CAD" (Wiley, 2009), and 'Antenna Theory and Applications' (Wiley, 2012).

Shady Keyrouz received the B.Sc. degree in Electrical Engineering from Notre Dame University in Beirut, Lebanon, in 2008. He received the M.Sc. degree in Communication Technology from Ulm University in Germany, in 2010 and the Ph.D. degree from Eindhoven University of Technology, The Netherlands, in 2014. His research interests include antenna modeling, rectenna design, wireless power transmission, and reflect-array antennas.

Bart Smolders received his M.Sc. and Ph.D. degree in Electrical Engineering from the Eindhoven University of Technology (TU/e), The Netherlands, in 1989 and 1994, respectively. From 1989 to 1991, he worked as an IC Designer at FEL-TNO, The Hague, The Netherlands. From 1994 to 1997, he was a Radar System Designer with Thales, The Netherlands. From 1997 to 2000, he was the project leader of the Square Kilometer Array (SKA) with the Netherlands Foundation for Research in Astronomy (ASTRON). From 2000 to 2010, he has been with NXP (formerly Philips) Semiconductors, The Netherlands, responsible for the innovation in the RF business line. In 2007, he was appointed as professor at TU/e in the Electromagnetics Group with special interest in antenna systems and applications. He is the Chairman of the NERG (Nederlands Radio- en Elektronica Genootschap), Vice-chair of IEEE-Benelux, and Vice-chair of the EuCAP 2014 Organizing Committee
Corresponding author: H. J. Visser Email: Huib.Visser@imec-nl.nl

Wireless Power Transfer 2015, 2(1): 44-50 | Cite this article

Abstract

Design steps are outlined for maximizing the RF-to-dc power conversion efficiency (PCE) of a rectenna. It turns out that at a frequency of 868 MHz, a high-ohmic loaded rectifier will lead to a highly sensitive and power conversion efficient rectenna. It is demonstrated that a rectenna thus designed, using a 50 Ω antenna and lumped element matching network gives a superior PCE compared with state of the art also for lower resistive loading. By omitting the matching network and directly, conjugate impedance matching the antenna to the rectifier, the PCE may be further increased and the rectenna size reduced as it is demonstrated with a rectenna prototype measuring only 0.028 squared wavelengths at 868 MHz and demonstrating a PCE of 55% for a −10 dBm RF input power level.
- Antenna,
- Rectenna,
- Impedance,
- Efficiency

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Visser HJ, Keyrouz S, Smolders AB. 2015. Optimized rectenna design. Wireless Power Transfer 2(1): 44-50 doi: 10.1017/wpt.2014.14

Visser HJ, Keyrouz S, Smolders AB. 2015. Optimized rectenna design. Wireless Power Transfer 2(1): 44-50 doi: 10.1017/wpt.2014.14

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Optimized rectenna design

1.
Holst Centre/imec, PO Box 8550, Eindhoven 5605 KN, The Netherlands
2.
Faculty of Electrical Engineering, Eindhoven University of Technology, PO Box 513, MB Eindhoven 5600, The Netherlands

Author Bio:
Hubregt J. Visser received the M.Sc. degree in Electrical Engineering from Eindhoven University of Technology (TU/e), The Netherlands, in 1989. In 1990, he joined TNO Physics and Electronics Laboratory, The Hague, The Netherlands. He has participated in several projects concerning near-field antenna measurements, monolithic microwave integrated circuits design, and phased-array antenna design. In 2001 he joined TNO Science and Industry, Eindhoven, The Netherlands where he has been involved in antenna miniaturization projects. In 2009, he joined the Holst Centre as an employee of Imec working on wireless energy transfer. In 2009, he obtained a Ph.D. degree from Eindhoven University of Technology, The Netherlands and Katholieke Universiteit Leuven, Belgium. In 2014, he was appointed as professor at TU/e. Hubregt is the author of the books "Array and Phased Array Antenna Basics" (Wiley, 2005), "Approximate Antenna Analysis for CAD" (Wiley, 2009), and 'Antenna Theory and Applications' (Wiley, 2012).

Shady Keyrouz received the B.Sc. degree in Electrical Engineering from Notre Dame University in Beirut, Lebanon, in 2008. He received the M.Sc. degree in Communication Technology from Ulm University in Germany, in 2010 and the Ph.D. degree from Eindhoven University of Technology, The Netherlands, in 2014. His research interests include antenna modeling, rectenna design, wireless power transmission, and reflect-array antennas.

Bart Smolders received his M.Sc. and Ph.D. degree in Electrical Engineering from the Eindhoven University of Technology (TU/e), The Netherlands, in 1989 and 1994, respectively. From 1989 to 1991, he worked as an IC Designer at FEL-TNO, The Hague, The Netherlands. From 1994 to 1997, he was a Radar System Designer with Thales, The Netherlands. From 1997 to 2000, he was the project leader of the Square Kilometer Array (SKA) with the Netherlands Foundation for Research in Astronomy (ASTRON). From 2000 to 2010, he has been with NXP (formerly Philips) Semiconductors, The Netherlands, responsible for the innovation in the RF business line. In 2007, he was appointed as professor at TU/e in the Electromagnetics Group with special interest in antenna systems and applications. He is the Chairman of the NERG (Nederlands Radio- en Elektronica Genootschap), Vice-chair of IEEE-Benelux, and Vice-chair of the EuCAP 2014 Organizing Committee
Corresponding author: H. J. Visser Email: Huib.Visser@imec-nl.nl

Wireless Power Transfer 2, Article number: 10.1017/wpt.2014.14 (2015) | Cite this article

Abstract: Design steps are outlined for maximizing the RF-to-dc power conversion efficiency (PCE) of a rectenna. It turns out that at a frequency of 868 MHz, a high-ohmic loaded rectifier will lead to a highly sensitive and power conversion efficient rectenna. It is demonstrated that a rectenna thus designed, using a 50 Ω antenna and lumped element matching network gives a superior PCE compared with state of the art also for lower resistive loading. By omitting the matching network and directly, conjugate impedance matching the antenna to the rectifier, the PCE may be further increased and the rectenna size reduced as it is demonstrated with a rectenna prototype measuring only 0.028 squared wavelengths at 868 MHz and demonstrating a PCE of 55% for a −10 dBm RF input power level.

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