Class-E amplifier has the potential to deliver high efficiency required for the next generation wireless systems. In this journal, we discuss a novel load pull analysis technique to characterize the efficiency performance of Class-E amplifier in an outphasing power combining scheme. Class-E amplifier is not an ideal current or voltage source as is required for the traditional analysis of outpha...

This paper proposes a wireless power transfer system with reconfigurable series/parallel (RSP) receiver (RX), which can adaptively change its topology to either series-series (SS) or series-parallel (SP) by sensing the load current. This leads to a high system efficiency under all load conditions. The RX IC is fabricated in TSMC 0.25μm 5V/40V BCD process and occupies an area of 1.571.90mm. Com...

This paper focuses on the load transfer improvement caused by nanofibers (NF) in carbon fiber reinforced composites. Load transfer is defined as the ability to transfer the mechanical loading between two adjacent fibers through the surrounding matrix. NF action is explored with a finite element model representing two carbon fibers separated by a layer of a NF reinforced matrix. It appears that ...

Electronic devices usually operate in a variable loading condition and the power transfer efficiency of accompanying wireless (WPT) method should be optimizable to load. In this paper, reconfigurable WPT technique is introduced maximize weakly coupled, load application. A series-series two-coil network with resonators at frequency 150 kHz presented and, under condition, shunt capacitor element ...

Carbon fibres have attracted interest from both the scientific and engineering communities due to their outstanding physical properties. Here we report that recently synthesized ultrathin diamond nanothread not only possesses excellent torsional deformation capability, but also excellent interfacial load-transfer efficiency. Compared with (10,10) carbon nanotube bundles, the flattening of nanot...

basic understanding of the process of coolant heat transfer inside an engine is an indispensable prerequisite to devise an infallible cooling strategy. coolant flow and its heat transfer affect the cooling efficiency, thermal load of heated components, and thermal efficiency of a diesel engine. an efficient approach to studying cooling system for diesel engine is a 3d computational fluid dynami...

Generally, joint performance in concrete pavements is evaluated laboratory by applying dynamic loads that require large scale experimental setups. In order to propose a simplified test, comprehensive literary review of the fundamentals load transfer at joints made, and efficiency obtained via reduced test compared under static conditions. The results confirm feasibility analysis for evaluating ...

A new design approach is presented in this paper to show that under certain conditions, in a two-coil wireless power transfer system, the double-sided inductor-capacitor-capacitor (LCC) compensated wireless power transfer (LCC-WPT) system can be more energy efficient than the series-series (SS) compensated wireless power transfer (SS-WPT) system for the same load power, with special attention b...