In this paper, a fully integrated active rectifier with triple feedback loops is proposed to enhance power conversion efficiency (PCE) over wide loading range by calibrating both the gate transition timing and switch size. The on- off-transitions of switches are calibrated using hybrid delay-based control circuit (HDGCC) loops. Conventional rectifiers that only focused on NMOS fixed size exhibit low PCE when condition deviates from predetermined range. Thus, an automatic selector based third...

A photovoltaic (PV) energy harvesting system with 2-Dimensional Fast Maximum Power Point Tracking (2-D FMPPT), based on the hill climbing (HC) MPPT technique is proposed. The 3-step modes for are employed to obtain KVOC that independent of environmental effects such as irradiance and radiated temperature. consists a dynamic peak transducer power sensor (DPTPS), Coarse (1st) FMPPT mode, Ton Increment/Decrement Mode, Fine (2nd) logics, controller. can handle voltage range 0.5 V 2.4 1.4 mW 119...

This paper presents a wide input range active rectifier using bipolar-CMOS-DMOS (BCD) process with high voltage conversion ratio (VCR) and power efficiency (PCE). The proposed ensures safe robust operation under large variations, which can be caused by changes in the magnetic coupling or loading conditions. It supports an 3-12 V adaptive delay-compensated of switches. An signal clamper voltage-time hybrid gate control circuit two compensation loops was for optimal transition low-side NMOS...

Despite coronavirus disease 2019, cardiovascular disease, the leading cause of global death, requires timely detection and treatment for a high survival rate, underscoring 24 h monitoring vital signs. Therefore, telehealth using wearable devices with sign sensors is not only fundamental response against pandemic but solution to provide prompt healthcare patients in remote sites. Former technologies which measured couple signs had features that disturbed practical applications devices, such...

Fully integrated on-time-based mode control is utilized to achieve an efficient of a PWM/PFM buck converter for implantable medical devices. The proposed method predicts load current from the on-time power switches and does not require additional sensor. Additional passive components estimation are required in this approach. Moreover, consumes less requires smaller area compared with other circuits used prediction. dual fabricated using TSMC <inline-formula...

Abstract Research on magnetically resonant wireless power transfer (MRWPT) is actively pursued for diverse applications. Dependent magnetic fields (WPT), MRWPT encounters a challenge due to the absence of monopole properties, impacting efficiency (PTE) sensitivity receiver arrangement. Despite extensive research, achieving desired freedom remains persistent challenge—a core limitation rooted in field‐based WPT. To address this, electrically (ERWPT) proposed, utilizing an open bifilar coil at...

Recently, research has been actively conducted to overcome various challenges observed in wireless power transfer (WPT) technology. However, as additional techniques are implemented, the complexity and cost of WPT systems increased. Therefore, there is a need for new method that can shortcomings existing This paper presents metal surface guided-wireless (MSG-WPT) system applications with multiple receivers (Rxs). First, plate-wire propagation enhancer (PWPE) shown improve efficiency (PTE)....

This paper presents a triple-band radio frequency (RF) energy harvesting system with 99.99% peak tracking efficiency and the triple band rectifier achieves 4.6% improvement in power conversion (PCE). The proposed has range of −11 to 7 dBm three bands targeted on 900, 1900, 2400 MHz. In this paper, voltage characteristics at each are extracted as raw data by measurement. DC-DC boost converter is applied achieve maximum point (MPPT), which exploits hill-climbing MPPT method. method implemented...

A decade ago, non-radiative wireless power transmission reemerged a promising alternative to deliver electrical devices where physical wiring proved be unfeasible. However, conventional coupling-based approaches are neither scalable nor efficient when multiple involved, as they restricted by factors like coupling and external environments. Zenneck waves excited at interfaces, surface plasmons have the potential placed on conducting surface. Here, we demonstrate, long range delivery of...

A key limitation inherent in wireless power transmission (WPT) systems using coils is a high sensitivity to the alignment between transmitting and receiving coils. Moreover, physical separation of or any metallic barrier them can notably reduce efficiency. To overcome these limitations, practical WPT system that insensitive obstacles proposed. It uses printed circuit board‐type antenna fabricated by reducing structure an used previous research designed resonate at target frequency through...

Using layers of mesh shaped and flat copper plate, this paper demonstrates single metal path power transfer system without return through the surface aluminum foil at 13.56MHz. Transceivers are isolated from energy propagating medium but wave gets excited. This technology is free co-alignment limitation between Tx Rx, enabling position Rx with given plate environment. Around 20% efficiency was achieved a LC matching network part.

We present a metasurface antenna comprising periodic arrangement of interconnected rectangular unit cells. The proposed is designed to utilize evanescent mode resonance. resonance achieved by utilizing strong cavity oscillation, when the placed over metallic surface. However, freely suspended in air, its natural state, absent. At an optimized feed point, can be excited directly with 50 ohm impedance line.

A decade ago, non-radiative wireless power transmission re-emerged as a promising alternative to deliver electrical devices where physical wiring proved be unfeasible. However, existing approaches are neither scalable nor efficient when multiple involved, they restricted by factors like coupling and external environments. Zenneck waves excited at interfaces, surface plasmons have the potential placed on conducting surface. Here, we demonstrate, long range delivery of exciting over metal...

A decade ago, non-radiative wireless power transmission re-emerged as a promising alternative to deliver electrical devices where physical wiring proved be unfeasible. However, existing approaches are neither scalable nor efficient when multiple involved, they restricted by factors like coupling and external environments. Zenneck waves excited at interfaces, surface plasmons have the potential placed on conducting surface. Here, we demonstrate, long range delivery of exciting nonradiative...

This study reports a miniaturised discontinuous conduction mode (DCM) variable on‐time (VOT) buck converter providing an output of 1.8 V in the input range 3–12 to support applications with large wireless coupling. Conventionally, additional capacitor has been used as bootstrap drive high‐side switch converters, which prevents minimisation. In this study, standalone momentary power consumption level shifter is proposed remove and increase conversion efficiency (PCE) converter. A Zener diode...