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A constant voltage output independent of loads is desirable in magnetically resonant wireless power transfer (WPT) systems. Most of the magnetically resonant WPT systems developed so far do not have such a property. In this paper, we introduce compensation networks to the WPT systems and develop the conditions and parameters that allow the magnetically resonant coupling WPT systems to be of load independent.
This paper presents a new transmitting array of magnetically-coupled resonance system for multi-receiver wireless power transfer systems. It consists of several resonant coils driven by a single source loop. Our analysis shows that it can deliver power wirelessly to multiple receivers evenly and automatically without any control circuits with a relatively high power transfer efficiency. The proposed...
Antenna diversity has long been one method of increasing gains and enhancing performance in wireless systems. Such diversity provides a means to overcome the effects of signal multipath and fading in realistic RF channels or propagation environments. The design proposed here uses hybrid combining of two types of antenna diversity, spatial and polarization, to provide a consistently better received...
The proposed designs are include in array of 1×2 resonators, the array of 2×2 resonators and the array of 3×3 resonators for magnetically-coupled resonance wireless power transfer (MCR-WPT) system. The arrays of WPT system provide high performance when the transmitter and the receiver are in misaligned positions in over-coupled and under-coupled situations. Also, we introduced a method for simulation...
In recent years, millimeter waves attract significance attention due to its global availability of massive spectral resources. Many technologies have been developed using millimeter waves for various applications. Among them, wideband impulse radio technology offers several advantages compared to traditional narrowband systems. In this paper, we propose and present the implementation of an impulse...
This paper presents the thermal noise in nano-scale MOSFETs — from measurement, characterization, modeling, and potential technology enhancement for future low power, mixed-signal, and radio-frequency (RF) applications. Experimental data from five CMOS technology nodes, namely 180 nm, 130 nm, 90 nm, 65 nm, and 40 nm nodes are presented and discussed.
Presently most signal processing technologies employed in impulse radio UWB transceivers are straightforward derivatives of those designed for conventional wireless transceivers. They appear not to take full advantage of some special features offered by the impulse radio UWB transceivers, such as ultra-wide bandwidth and very short duration pulses. To move beyond this shortcoming, in this paper, we...
This paper investigates code synchronization for arecently proposed code-shifted reference (CSR) impulseradio ultra-wideband (IR-UWB) system. In the CSRscheme every symbol with the code-shifted informationbits is conveyed by several frames and during each frameonly one pulse is transmitted. By assuming that the startof each frame concerning the receiver’s clock is known,two code synchronization algorithms...
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