Millimeter-Wave Power Transmission for Compact and Large-Area Wearable IoT Devices Based on a Higher Order Mode Wearable Antenna

Owing to the shorter wavelength in millimeter-wave (mmWave) spectrum, miniaturized antennas can receive power with a higher efficiency than UHF bands, promising sustainable mmWave-powered Internet of Things (IoT) devices. Nevertheless, performance mmWave receiver has not been compared, numerically or experimentally, its sub6-GHz counterpart. In this article, receivers is evaluated based on novel wearable textile-based order mode microstrip antenna, showing benefits wireless transmission (WPT). First, broadband antenna proposed maintaining stable measured bandwidth from 24.9 31.1 GHz, over threefold improvement compared conventional patch. The 8.2 dBi co-polarized gain highest thickness-normalized antenna. When for compact receivers, path shows that WPT at 26 GHz outperforms 2.4 by 11 dB. A rectenna array then analytically potential up $6.3\times $ reception patch, antenna’s and an empirical path-loss model. Both use cases demonstrate rectennas are suitable area-constrained large-area IoT applications.