RF/baseband co-design of switching receivers for multiband microwave energy harvesting

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• 作者：Alessandra Costanzo^a ; ^{alessandra.costanzo@unibo.it}  ; [Author Vitae] ; Aldo Romani^a  ; [Author Vitae] ; Diego Masotti^b  ; [Author Vitae] ; Nicola Arbizzani^b  ; [Author Vitae] ; Vittorio Rizzoli^b  ; [Author Vitae]
• 关键词：Rectenna ; Energy harvesting systems ; DC&ndash ; DC conversion ; Multi-domain simulation
• 刊名：Sensors and Actuators A: Physical
• 出版年：2012
• 出版时间：June, 2012
• 年：2012
• 卷：179
• 期：Complete
• 页码：158-168
• 全文大小：1322 K

文摘

The paper addresses a new integrated design of RF/Microwave receivers and conversion systems for energy harvesting to be adopted in ultra-low power density environments. Such systems can be very useful in typical humanized scenarios in the presence of existing wireless systems with power densities as low as a few ¦ÌW/cm². Despite of the scarce RF power available, energy usable to extend battery life or to self-power low-duty cycle electronics may be scavenged by highly efficient receivers and power converter circuits designed in a unique design process. A multi-band antenna is used as the RF power receiver. Its rigorous frequency-dependent equivalent circuit in the presence of incident fields, simultaneously radiated in several bands, is used in the joint design of a rectifier stage and of a boost converter that can dynamically track the maximum power point. This is obtained by a new simulation platform combining SPICE-like time-domain models of dispersive multiport components with the transient analysis of the storage and control sub-systems. The system operation is fully measured in a practical application and predicted and measured stored energy and system efficiency are discussed. As preliminary results the converter is realized by discrete components, but a significant reduction in power consumption is expected by an integrated circuit design.