Abstract
In this letter, an ultra-broadband rectifier with expanded dynamic input
power range (IPR) for both wireless power transfer (WPT) and radio
frequency energy-harvesting (RFEH) is proposed and analyzed. Expanded
dynamic IPR and broadband impedance matching are realized by utilizing a
microstrip transmission line impedance compression circuit (MTLICC) with
the topology of the paralleled voltage doubler. A proof-of-concept
prototype shows a dynamic IPR of 8.5–23.5 dBm, a frequency range of
0.33–2.61 GHz (fractional bandwidth of 155%), PCE is greater than
50%, and a peak PEC of 79.7% (achieved at an input-power level of 19
dBm). The measurement results are in good agreement with the simulation.
Covering most 3G/4G/5G/ISM frequency bands, this design is promising for
RF power transmission and energy harvesting in the age of the Internet
of Things systems.