Department of Electrical and Electronics Engineering

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Author: search.filters.author.Rano, DineshSubject: search.filters.subject.Defected Ground Structure (DGS)

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    Misalignment Study of Dual-Band SIMO- and MIMO- WPT Systems
    (IEEE, 2023) Rano, Dinesh
    In this paper, the misalignment study of single input-multi output (SIMO) and a multi input-multi output (MIMO) defected ground structure based dual-band wireless power transfer (DGS-WPT) system is discussed. As a case study, WPT systems operating at 300 MHz / 700 MHz are designed in CST and prototyped. In this case, the best system efficiency is obtained for the separation of h = 18 mm between the transmitter (TX) and receivers (RXs). The misalignment study includes a detailed analysis of shift in the lateral and angular position of RXs with respect to the TX. It was observed that the misalignment has more negative impact on the performance of SIMO than the MIMO type WPT system.
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    On the Use of Dual-Band SIMO- and MIMO-Based Defected Ground Structures in the Design, Characterization, and Validation of RF WPT System
    (IEEE, 2023) Rano, Dinesh
    This article reports, for the first time, a single-input–multi-output (SIMO) and a multi-input–multi-output (MIMO)-based dual-band defected ground structure wireless power transfer (DGS-WPT) system. At first, novel equivalent circuits of both the systems are developed using the theory of impedance/admittance matrix and quasi-static approximation. Subsequently, these equivalent circuits are used to perform a thorough investigation and analysis to address the issues related to characterization and cross-coupling in such dual-band WPT systems. As a case study, dual-band SIMO- and MIMO-DGS-WPT systems operating at 300 and 700 MHz are fabricated and characterized while keeping the transmitter (TX) and receiver (RX) at an optimal distance ( h ) of 18 mm. An excellent agreement between the measured and simulation results demonstrates the effectiveness of the proposed approach. The power transfer efficiency for the SIMO-WPT system is 68.7% and 70% at the design frequencies of 300 and 700 MHz, respectively. Similarly, the corresponding values for the MIMO-WPT system are 75.1% and 73.2%. These results are unique and advance the state-of-the-art significantly.
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    Measurements and Characterization of a Newly Developed Novel Miniature WIPT System
    (IEEE, 2021-05) Rano, Dinesh
    This article reports, for the first time, the design and experimental evaluation of a compact wireless information and power transfer (WIPT) system operating at radio frequency (RF). The design of WIPT system is facilitated by the development of a novel tri-band defected ground structure (DGS) based bandstop filter (BSF) operating at three different frequencies of 300, 433, and 700 MHz. Then, two similar BSFs are arranged in a back-to-back configuration to achieve near-field resonant inductive coupling for transfer of information and power. The measurement carried out on a prototyped system shows an excellent agreement between the measured and simulation results and provides power transfer efficiencies of 70.1%, 66%, and 65% at 300, 433, and 700 MHz, respectively, at a separation distance of 23 mm. These figures are a significant advancement over the existing state of the art. Furthermore, up-link and down-link of data transfer at 433 and 700 MHz are demonstrated using universal software radio peripheral (USRP), and power transfer is shown by illuminating a light emitting diode (LED) at 300 MHz.