Enhanced RF Energy Harvester for Power Efficient Internet-of-Things Wireless Sensors

Afyf, Amal; Sennouni, Mohamed Adel; Bellarbi, Larbi; Achour, Anouar; Yaakoubi, Nourdin

doi:10.1109/icmcs.2018.8525940

Cited by 4 publications

(1 citation statement)

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“…However, the limited battery capacity remains a bottleneck that restricts the durability and portability of wireless devices [2]. There is an urgent need to address the problem of efficiently powering wireless devices before their massive deployment for thriving applications such as 5G, Internet of Things (IoT) [3], [4], Wireless Sensor Networks (WSN) [5], etc. Today, electronic devices like mobile phones and medical implants can be charged by the way of electromagnetic induction, and the The associate editor coordinating the review of this manuscript and approving it for publication was Andrei Muller .…”

Section: Introductionmentioning

confidence: 99%

Dual-Polarized Communication Rectenna Array for Simultaneous Wireless Information and Power Transmission

Zhu

Yang

et al. 2019

IEEE Access

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A dual-polarized communication rectenna array with high isolation and low cross polarization for simultaneous wireless information and power transmission (SWIPT) is presented. It consists of a 2 × 2 element receiving antenna array and a high efficiency rectifier based on voltage doubler topology. The receiving element is corner-fed to achieve high isolation of more than 20 dB between the dual-polarized ports, which guarantees low mutual interference between the communication and the rectifying ports. To receive enough electromagnetic (EM) wave for rectifying and meanwhile meet the communication sensitivity, this 2 × 2 array uses its 2 × 2 vertical polarization ports and 1 × 2 horizontal polarization ports for power rectifying, and the rest 1 × 2 horizontal polarization ports for communication. For the communication port, the measured gain is 10.9 dBi and the cross polarization is less than −20 dB. The performance of the whole communication rectenna array has been measured, where a 2 × 4 circularly-polarized array with a gain of 17.5 dBi, settled 1 meter away is used as the transmitter. Measured results show that the system achieves a peak microwave -direct circuit (mw-dc) conversion efficiency of 74.9 % for the CW signal, and 67 % for the QPSK signal with 10 MHz channel bandwidth on the load of 345 at 2.58 GHz operating frequency.INDEX TERMS Simultaneous wireless information and power transmission (SWIPT), rectenna array, rectifier, conversion efficiency.

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