Waveform Optimization Using RF Pulse Signal on Voltage-Doubler Broadband Rectenna

Abstract

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Theory and Experiment of Pulse Wave Rectifier with High Efficiency

“…Apparently, the efficiencies of the modulated waves were lower than that of the CW wave, which is explained by the fact that the peak-to-average power ratios (PAPRs) of the CW and modulated waves were the same. Experimental research has found that the modulated waves with high PAPR would obtain high efficiency when the input power was low [10,11]. Pham et al measured the maximum efficiencies of 74.7% for pulse wave (PW) and 8.3% for CW when the input power was −15 dBm and the load resistance was 100 kΩ [10].…”

“…Experimental research has found that the modulated waves with high PAPR would obtain high efficiency when the input power was low [10,11]. Pham et al measured the maximum efficiencies of 74.7% for pulse wave (PW) and 8.3% for CW when the input power was −15 dBm and the load resistance was 100 kΩ [10]. In [11], the measured results showed that the OFDM, white noise and chaotic signals had a higher efficiency than CW at the input power of −10 dBm.…”

“…The first one is measurements. After designing the rectifiers based on the theory of the CW rectifier, the efficiencies of modulated signals were measured [7][8][9][10][11]. The measured peak mw-dc efficiency of the CW in [7] was 78.7%, while that of the QPSK signal was 72.4%.…”

Efficiency improvement of an UWB rectifier by using optimized pulse modulation signal: simulation and experiments

“…Facing the necessity to satisfy the energy needs of smart circuits and sensors, the improvement of DC voltage and/or RF-to-DC conversion efficiency of rectifying circuits and more generally rectennas is presented as a key challenge in particular for low power levels. In order to rise it, and instead of focusing on the rectenna cell, one can take benefit from the transmission strategy by changing the excitation signal [1][2]. In [3][4], the authors present the impact of different waveforms on a series diode converter circuit using signals such as chaotic signal, white noise as well as OFDM and show that waveforms with high Peak to Average Power Ratio (PAPR) increase the RFto-DC conversion efficiency.…”

Power Optimized Waveform for Wireless Power Transfer Systems : Simulations and Experiments

“…In [5], multisine signal is used to improve the range and readability of RFID tags. In [6][7], RF pulse signal allows to improve the output DC voltage and efficiency of rectifiers operating at 2.4 GHz when the duty cycle and the load resistances vary. In [8], the authors demonstrate that with the 3-tone Tx waveforms, the IM3 carrier generated by the nonlinear tag can be enhanced by 4 dB.…”