In this presentation we discuss the entire nonlinear RF-base/band co-design procedure of RF rectifiers required to dynamically cooperate with ultra-low power management unit (PMU), which represent their actual loads. The design targets are battery-less RF energy harvesting applications with typical input power ranging from 10 to 100 microW. In order to allow activation in discharged states, the PMU is equipped with a low voltage start-up stage, specifically optimized for biasing the rectifier accordingly. When a sufficient voltage is reached, the PMU activates a more efficient boost converter stage with maximum power point tracking (MPPT) capabilities and micro-power consumption. These two configurations thus result in two very different loading conditions for the nonlinear operations of the rectifier. Thus to obtain successful operation, a joint design of the nonlinear rectifier paths and of the PMU sub-systems is mandatory, along with a circuit solution for automatically switching between the start-up stage and the boost converter. The design procedure will be extensively described and its steps demonstrated by means of a microstrip prototype and by a discrete components PMU. Finally possible different technology solutions will also be discussed.
Costanzo, A., Masotti, D., Fantuzzi, M. (2015). RF-baseband nonlinear co-design of zero-power harvesting systems.
RF-baseband nonlinear co-design of zero-power harvesting systems
COSTANZO, ALESSANDRA;MASOTTI, DIEGO;FANTUZZI, MARCO
2015
Abstract
In this presentation we discuss the entire nonlinear RF-base/band co-design procedure of RF rectifiers required to dynamically cooperate with ultra-low power management unit (PMU), which represent their actual loads. The design targets are battery-less RF energy harvesting applications with typical input power ranging from 10 to 100 microW. In order to allow activation in discharged states, the PMU is equipped with a low voltage start-up stage, specifically optimized for biasing the rectifier accordingly. When a sufficient voltage is reached, the PMU activates a more efficient boost converter stage with maximum power point tracking (MPPT) capabilities and micro-power consumption. These two configurations thus result in two very different loading conditions for the nonlinear operations of the rectifier. Thus to obtain successful operation, a joint design of the nonlinear rectifier paths and of the PMU sub-systems is mandatory, along with a circuit solution for automatically switching between the start-up stage and the boost converter. The design procedure will be extensively described and its steps demonstrated by means of a microstrip prototype and by a discrete components PMU. Finally possible different technology solutions will also be discussed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.