Compactmulti‐frequencysystem design forSWIPTapplications

Abstract

The potential advantages of simultaneous wireless information and power transfer (SWIPT) applications have necessitated innovations in the associated circuits and systems. This article, therefore, explores the concept of cascaded resonators, for the first time, in the design of a compact-size defected ground structure (DGS)-based tri-band wireless power transfer (WPT) system to advance the SWIPT technology. The design is augmented with a systematic design procedure that is preceded by the development of a new double-elliptic DGS-based tri-band resonator. Initially, the analysis of the proposed resonator is performed to identify the impact of defect size on the bandwidth. Subsequently, the resonators are cascaded to achieve a tri-band functionality and then utilized in the design of WPT. The designed WPT operates at 0.3, 0.5, and 0.9 GHz, and takes a compact size of 39 × 13 mm 2 . The measurement of the realized WPT with the transmitter and receiver, separated by the distance of 10 mm, provides an efficiency of around 60% at all three bands with the figure of merit values of about 0.5. Furthermore, the proposed design achieves a bandwidth of more than 3 MHz bandwidth at the frequencies corresponding to communication standards.

A Comprehensive Analysis, Design, and Experimental Evaluation of Single-Loop Polygonal Slotted RF Resonators and WPT Systems

“…The influence of etched slots is multifaceted and, as a result, they can lead to a variety of outcomes. In essence, in the presence of slots in the ground plane a typical behavior of transmission lines is significantly modified [5]. As a consequence, microstrip lines (MLs) demonstrate different stop-band features.…”

“…Apparently, the successful realization of this method highly depends on the performance of SGP-based resonators which act as the system's end modules. In such systems, one resonator acts as Tx whereas another one is Rx [5]. Essentially, the optimized resonators, meeting the WPT specification requirements, can be coupled at a certain proximity to achieve the power transfer wirelessly.…”

“…As a concept, magnetic resonant coupling (MRC) also falls under the umbrella of inductive coupling. This enables the synchronization of the resonance of the transmitter (Tx) and receiver (Rx) to enhance the WPT performance [5]. In this instance, it should be noted that a number of factors, namely, power level, cou-pling degree, operating frequency, resonator structure, and size, influence the performance of MRC-based WPTs [6].…”

Dual-Polarized Wearable Antenna/Rectenna for Full-Duplex and MIMO Simultaneous Wireless Information and Power Transfer (SWIPT)

“…Furthermore, [19], [21], [22] are not different from standard dual-port 50Ω antennas, and rely on an external rectifier matching network. Recently, a triple-band coupled resonator was proposed for SWIPT applications, RF-DC performance as well as power splitting mechanisms have not been investigated [23].…”