Abstract
In this article, we demonstrate flexible and lightweight textile-integrated rectenna arrays for powering wearable electronic devices. We propose a method to exploit large clothingareas to integrate arrays consisting of 2 × 2 and 2 × 3 rectenna elements. Each element comprises a patch antenna and a rectifier which are fabricated using embroidery of conductive thread on the textile substrates. The rectifier used single-diode circuit configuration and showed a radio frequency (RF)-to-dc conversion efficiency of 70% for an applied input RF-power of 8 dBm at its input port. We also present several tests to demonstrate the applicability of the rectenna array. Specifically, in boosted-Wi-Fi modality, a dc power of 600 μW was collected at 10 cm from the source and 80 μW was collected at 60 cm from the source. These demonstrations show the proposed system's applicability for charging and powering low-power wearable electronic devices.
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