Energizing an IoT Sensor Using Regenerative Opposite Fringing Fields From an Embedded Communicating Patch Antenna

Abstract

An integrated, miniature, dual-purpose circular patch antenna is proposed for Simultaneous Wireless Information and Power Transmission (SWIPT). The design proposes a proximity-coupled feed to the radiative circular patch for Wireless Information Transfer (WIT) in ${\mathrm {5.7 \text {GHz}}}$ - ${\mathrm {6.0 \text {GHz}}}$ band and an integrated capacitive-coupled feeding network, with full-wave rectification (FWR) using regenerative opposite fringing fields from the radiating edges of the patch for energizing IoT sensors by means of wireless power transfer (WPT) at ${\mathrm {5.2 \text {GHz}}}$ . For the realization, two co-polarized fringing field harvesters are capacitively coupled to the radiating edges of the patch to regenerate those opposite fringes whose currents are effectively matched to the FWR using a pair of Schottky diodes for direct current (DC) power generation. Since the gain and efficiency of the patch, in WIT mode, are favoured when using the FWR network, the effective regenerative fields, which are deemed attractive in modern wireless sensor network (WSN) applications for boosting the lifespan of sensor nodes.

Keywords

• WPT
• WIT
• FWR
• IoT
• SWIPT
• patch antennas