A Wide Dynamic-Range Rectifier at 433 MHz for Multiple-Antenna Impedances

Au, Ngoc Duc; Le-Huu, Hoang; Seo, Chulhun

doi:10.1109/lmwc.2020.3036375

Cited by 5 publications

(2 citation statements)

References 19 publications

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“…where |S 11 | is the reflection coefficient of the WPT Tx, and |S 21 | is the transmission coefficient between WPT Tx and self-diplexing implantable antenna. Moreover, the efficiency of overall WPTS can be evaluated by multiplying the WPT efficiency (PTE) with the rectifier efficiency (η RF-dc ) using ( 15) [42]. The overall efficiency of the WPTS is 0.81% for the input power of 0 dBm…”

Section: Resultsmentioning

confidence: 99%

Biotelemetry and Wireless Powering of Biomedical Implants Using a Rectifier Integrated Self-Diplexing Implantable Antenna

Iqbal

Al‐Hasan

Mabrouk

et al. 2021

IEEE Trans. Microwave Theory Techn.

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This article proposes an efficient and complete wireless power transfer (WPT) system (WPTS) for multipurpose biomedical implants. The WPTS is composed of a self-diplexing implantable antenna, efficient rectifier, and WPT transmitter (WPT Tx). The proposed system is capable of simultaneously transmitting recorded data and recharging the batteries of the devices (so as to elongate the implant life). The WPT Tx occupies dimensions of 50 × 50 × 1.6 mm 3 and is optimized to effectively transfer power at 1470 MHz to a 55-mm deep implantable device. An efficient and compact (3.4 × 6.7 mm 2 ) rectifier is used at 1470 MHz to convert the harvested RF power into a useful direct current (dc) power. The proposed rectifier circuit exhibits a high conversion efficiency of 50% even at an input power of −14 dBm and maximum efficiency of 76.1% at 2 dBm. The proposed self-diplexing implantable antenna occupies small dimensions (9.4 mm 3 ) and operates at 915 and 1470 MHz by exciting ports 1 and 2, respectively. The biotelemetry operation is performed using a 915 MHz band (port 1), and the rectifier circuit is connected to port 2 (1470 MHz) to perform wireless powering. The simulated results are validated by examining the individual elements (WPT Tx, rectifier, and self-diplexing antenna) and overall WPTS in a saline solution and minced pork. The results prove that the proposed scheme is suitable for biotelemetry and wireless powering of biomedical implants.

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Section: Resultsmentioning

confidence: 99%

Biotelemetry and Wireless Powering of Biomedical Implants Using a Rectifier Integrated Self-Diplexing Implantable Antenna

Iqbal

Al‐Hasan

Mabrouk

et al. 2021

IEEE Trans. Microwave Theory Techn.

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“…Therefore, the prototype implementation of this research uses organic thin-film solar cells. Finally, the entire integrated circuit is evaluated based on the DC voltage level collected through the RF and solar sources [17], [32]. By simultaneously comparing the two in Figure 5, it is obtained that the increase in energy harvesting using a tiny electromagnetic source with the optimization of solar sources can increase the DC voltage output level up to 20×.…”

Section: Integrated the Hybrid Electromagnetic Solar Energy Harvestin...mentioning

confidence: 99%

Ring slot CP antenna for the hybrid electromagnetic solar energy harvesting and IoT application

Mujahidin

Kitagawa

2023

TELKOMNIKA

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The research proposed a compact antenna integrated with dual-function solar cells to optimize internet of things (IoT) communication devices and energy harvesting. The use of integrated solar cells with electromagnetic elements as antennas and energy-gathering in a design is a solution for wireless communication sensors and simultaneously electromagnetic and solar energy harvesting. Radiation performance testing of solar cell antennas and optical experiments were carried out to test the ability of solar energy collection. A double feed ring slot circular polarization (CP) antenna coplanar antenna with a configuration has highly sensitive to vertical and horizontal waves. It is to accommodate the impact of circular polarization wave and solar cell distortion on antenna performance. This technology promises green communications, renewable energy, and environmental protection to combine wireless communication and green battery components. The study presents the performance and design results of a double line-feed microstrip antenna circuit connected with CP antenna on the S-band for IoT communication by accommodating electromagnetic energy transmission. The importance of adopting an integrated radio frequency (RF) solar energy harvesting strategy rather than a single source method makes this research very significant in its novelty by optimizing the analysis of multiple signal access in IoT communications.

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A Novel Methodology to Improve Efficiency and Extend Dynamic Range of Shunt-Diode Class-F Rectifier for Wireless Power Transfer

Bui,

Nguyen,

Seo

2023

IEEE Access

Self Cite

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This paper presents a novel methodology to enhance power conversion efficiency (PCE) and extend dynamic range for class-F shunt-diode rectifier design based on increasing the number of diodes connected in parallel. The prototypes employ class-F harmonic termination which can eliminate almost loss due to harmonic generation and instead of one diode, using more diodes connected in parallel will reduce losses on the diode due to built-in potential voltage (V bi ) and breakdown voltage (V br ). The proposed methodology mechanism is analyzed and demonstrated by closed-form equations where the variation of the losses is clarified in the comparison. Furthermore, based on Schottky diode HSMS2850, two prototypes in two cases: a single diode and two parallel-connected diodes are designed at 0.915 GHz, and measured to compare the efficiency for methodology verification. The implementation results show that the PCE of two parallel-connected diode case is higher than the one of a single diode case when the highest PCEs of two parallel connected diodes are 78.3% in simulation and 73.2% in measurement while the corresponding PCEs of single diode case are only 75.3% and 70.7%. Moreover, the dynamic range of the two-diode prototype is also improved by about 2 dB. These experimental results have good agreement with theory and clarify the advantages of the proposed methodology.INDEX TERMS Class-F harmonic termination, efficiency improvement, shunt-diode rectifiers, wide dynamic range, wireless power transfer.

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A Wide Dynamic-Range Rectifier at 433 MHz for Multiple-Antenna Impedances

Cited by 5 publications

References 19 publications

Biotelemetry and Wireless Powering of Biomedical Implants Using a Rectifier Integrated Self-Diplexing Implantable Antenna

Biotelemetry and Wireless Powering of Biomedical Implants Using a Rectifier Integrated Self-Diplexing Implantable Antenna

Ring slot CP antenna for the hybrid electromagnetic solar energy harvesting and IoT application

A Novel Methodology to Improve Efficiency and Extend Dynamic Range of Shunt-Diode Class-F Rectifier for Wireless Power Transfer

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