Abstract
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 Ω at 2.58 GHz operating frequency.
Highlights
With the pervasive expansion of the wireless technology in people’s daily life, the requirement for wireless devices has experienced rapid growth in recent years [1]
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
We propose a novel 2×2 communication rectenna array for simultaneous wireless information and power transmission (SWIPT)
Summary
With the pervasive expansion of the wireless technology in people’s daily life, the requirement for wireless devices has experienced rapid growth in recent years [1]. A linear-polarized rectenna for SWIPT usage was proposed in [19], where transmitting EM wave power and information alternated at the different time. A dual-polarized rectenna with data communication capability was proposed in [20], where the two orthogonal polarization ports were used as transferring power and information simultaneously. The feeding network is designed to appropriately allocate the received signal to rectification and communication, ensuring the high performance of the entire SWIPT system.
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