Abstract
Generally, a conventional voltage doubler circuit possesses a large variation of its input impedance over the bandwidth, which results in limited bandwidth and low RF-dc conversion efficiency. A basic aspect for designing wideband voltage doubler rectifiers is the use of complex matching circuits to achieve decade and octave impedance and RF-dc conversion efficiency bandwidths. Still, the reported techniques till now have been accompanied by a large fluctuation of the RF-dc conversion efficiency over the operating bandwidth. In this paper, we propose a novel rectification circuit with minimal inter-stage matching that consists of a single short-circuit stub and a virtual battery, which contributes negligible losses and overcomes these existing problems. Consequently, the proposed rectifier circuit achieves a diode physical-limit-bandwidth efficient rectification. In other words, the rectification bandwidth, as well as the peak efficiency, are controlled by the length of the stub and the physical limitation of the diodes.
Highlights
A conventional voltage doubler circuit possesses a large variation of its input impedance over the bandwidth, which results in limited bandwidth and low radio frequency (RF)-dc conversion efficiency
In the wireless power transfer (WPT) and wireless energy harvesting (EH) applications, rectifier always has been an important unit where radio frequency (RF) power must be converted to the direct current power for powering low power devices like wireless sensor networks, pacemakers, biomedical implants, e tc[1,2,3,4,5,6]
This paper presents a novel rectification circuit that can utilize the maximum available bandwidth of a conventional voltage doubler circuit for ultrawideband rectification
Summary
A conventional voltage doubler circuit possesses a large variation of its input impedance over the bandwidth, which results in limited bandwidth and low RF-dc conversion efficiency. A basic aspect for designing wideband voltage doubler rectifiers is the use of complex matching circuits to achieve decade and octave impedance and RF-dc conversion efficiency bandwidths. Diode-based rectification circuits pop up with a vast variation in input impedance resulting in impedance mismatching This inappropriate impedance matching has always been accountable to a low efficient rectification circuit. Several novel techniques to design very low to high power high-efficiency wideband rectifiers for WPT and EH applications have been investigated[23,24,25,26,27,28,29,30,31,32,33,34,35,36,37]. To cope with the large input impedance variation the design techniques like RF differential two-stage rectifier design[23,32], complex transmission line broadband
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