The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
There is a conflict between the energy transfer efficiency and maximum transferred power in conventional inductive power transfer (IPT) systems, and the energy transfer efficiency is only 50% when maximum power is transferred. To solve this problem, a new topology which is operated at switched-mode is proposed in this paper. The high frequency current of the topology is generated by the free oscillation...
Charging the medical implant device is a hot issue, the current commonly used methods are RF telemetry, transmission of light telemetry, ultrasonic transmission, but their common drawback is that the body's ionic body fluids will affect the transmission efficiency, resulting in energy transmission reliability to reduce. This paper presents a charge model based on human skins, which utilize body's...
Introduction Contactless energy transfer (CET) is used in many applications where a physical connection between a device and a power source is impractical or even impossible.
Biomedical systems using microwave technology consume electric energy depending upon their applications. Those systems are deployed inside or outside living bodies. Energy can be supplied through wireless power transfer to the injected biomedical devices from outside, or can be harvested using various technologies such as RF, heat and vibration. For bio-systems or devices deployed outside living bodies...
The uniform lumped element transmission line that exhibits translational symmetry is an inherently dispersive network. The dispersion properties can be transformed by imposing a harmonic symmetry that requires all of the resonant frequencies of the network to be integral multiples of some fundamental frequency. The resulting line will have spatially varying component values, thus breaking the network's...
A coupled of ultrasonic transducer can act as a power transmission device by means of Acoustic Energy Transfer (AET). This method is relatively new method of contactless energy transfer and could be an alternative to the currently established technologies for the contactless transmission of power, such as inductive power transfer (IPT) and capacitive coupled power transfer (CPT). This paper presents...
Stepped exponential horns are proposed as a measure of acoustic impedance adaptation in an acoustic energy transfer (AET) system. Resonances due to impedance mismatches in the horn are used to obtain a maximal power throughput at a single frequency. Finite element (FE) models are used for optimisation of the horn parameters. Although experimental results do not match particularly well with simulations,...
Transcutaneous energy transfer (TET) is capable of supplying power across the skin to implantable devices and avoids the risk of infection associated with wires passing through the skin. These systems rely on a high frequency magnetic field to overcome the relatively low coupling between a coil located outside the body, and a coil implanted within the body. This paper introduces a new optimisation...
This article is dedicated to the design of rectifying antenna for wireless energy transfer at 2.45 GHz in the special case of low input power (typically <−10 dBm). As the rectifiers present an important non-linear behavior with such power levels, specific design guidelines must be respected in order to optimize the structure. Different rectifying circuits have been studied and their performances...
Electromagnetic wireless resonant energy links (WRELs) can be realized by using resonant coils coupled via their magnetic fields. By means of a simple equivalent network we investigate the efficiency of WRELs. It is demonstrated that, in order to improve the efficiency, a matching network at the input and output section should be used. In our arrangement the matching network is made by placing the...
An analytical methodology for establishing an equivalent-circuit network of nonradiative surface plasmon (SP) energy transport along the metallic nanowire (MNW) is presented. To find out the passive elements for MNW, the SP dispersion and damping relation through modified Bessel function electromagnetic (EM) field expansion was derived, thus demonstrating the low-pas transmission-line (TL) model....
The X-Delta model for through-skin volume conduction systems is introduced and analyzed. This new model has advantages over our previous X model in that it explicitly represents current pathways in the skin. A vector network analyzer is used to take measurements on pig skin to obtain data for use in finding the model's impedance parameters. An optimization method for obtaining this more complex model's...
In PCB circuits, signal traces are often routed close to other signal traces. This situation originates the appearance of coupled strip sections. Due to the fact that coupled strip sections behave as multimodal transmission lines, several electromagnetic modes propagate simultaneously. Any asymmetry in the circuit will generate an energy exchange among the propagating modes which will lead to signal...
The ??global?? energy cost is defined as the plug energy needed to destroy a given pollutant quantity. A minimum global energy cost is obtained if there is a maximum energy transfer from the pulsed high voltage generator (pulser) to the corona plasma, and if the corona plasma destroys a maximum pollutant quantity. The paper presents the research regarding these both components of the global energy...
The aim of this paper is to describe the GAEL electron-beam generator. This machine is a 1.2-MV Marx generator connected to a 2-ohm water coaxial line (1). The addition of an intermediate storage line and a water switch reduces the diode current rise time from 50 ns to 8 ns without important additional losses in the energy transfer. In the first section, we describe the generator. Our theoretical...
Pinch reflex diodes have been driven by the long pulse SIDONIX generator in negative polarity at the 0.5 TW level. Small radius diodes, favorable for focussing led to low energy transfers because of early gap closure. With larger radii : 5 cm, 200 kA of Deuterons were accelerated during a 100 ns pulse for a Marx energy of up to 230 kJ.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.