Design of an Energy Harvesting Rectenna for Low-Power Wireless Sensor

Lei Jun Xu; Chang Shuo Wang; Xue Bai

doi:10.4028/www.scientific.net/AMM.687-691.3391

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 687-691Design of an Energy Harvesting Rectenna for...

Design of an Energy Harvesting Rectenna for Low-Power Wireless Sensor

Abstract:

This paper presents the design of a compact 2.45 GHz microstrip rectenna for wireless sensors’ power supply. In energy harvesting system, the ambient RF energy can be collected by the rectenna and converted to direct current, therefore, it can be applied to the power supply of low-power wireless sensor. Voltage doubling rectifier circuit and T-type microstrip impedance matching network are applied to this rectenna to increase the output voltage and the rectification efficiency. The antenna is fabricatied by using double PCB board (FR4), and it is optimized by ADS to achieve the best performance. The measurement results show that the rectifier can reach the highest conversion efficiency of 78% when the load resistance is 320 Ω and the input power is 18 dBm. It also greatly improves rectenna’s conversion efficiency at lower input power when the input power is-20 dBm, which has great practical value for supplying low power consumption sensors.

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Periodical:

Applied Mechanics and Materials (Volumes 687-691)

Pages:

3391-3394

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.687-691.3391

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Online since:

November 2014

Authors:

Lei Jun Xu*, Chang Shuo Wang, Xue Bai

Keywords:

Conversion Efficiency, Energy Harvesting, Rectenna, Wireless Sensor

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