RF Energy Harvesting of HOM Power (original) (raw)
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Investigation of RF Signal Energy Harvesting
Active and Passive Electronic Components, 2010
The potential utilization of RF signals for DC power is experimentally investigated. The aim of the work is to investigate the levels of power that can be harvested from the air and processed to achieve levels of energy that are sufficient to charge up lowpower electronic circuits. The work presented shows field measurements from two selected regions: an urbanized hence signal congested area and a less populated one. An RF harvesting system has been specifically designed, built, and shown to successfully pick up enough energy to power up circuits. The work concludes that while RF harvesting was successful under certain conditions, however, it required the support of other energy harvesting techniques to replace a battery. Efficiency considerations have, hence, placed emphasis on comparing the developed harvester to other systems.
A tuned rectifier for RF energy harvesting from ambient radiations
A circuit topology based on accumulate-and-use philosophy has been developed to harvest RF energy from ambient radiations such as those from cellular towers. Main functional units of this system are antenna, tuned rectifier, supercapacitor, a gated boost converter and the necessary power management circuits. Various RF aspects of the design philosophy for maximizing the conversion efficiency at an input power level of 15 W are presented here. The system is characterized in an anechoic chamber and it has been established that this topology can harvest RF power densities as low as 180 W/m 2 and can adaptively operate the load depending on the incident radiation levels. The output of this system can be easily configured at a desired voltage in the range 2.2–4.5 V. A practical CMOS load – a low power wireless radio module has been demonstrated to operate intermittently by this approach. This topology can be easily modified for driving other practical loads, from harvested RF energy at different frequencies and power levels.
In this paper, we present a study of ambient RF energy harvesting techniques. The measurement of the ambient RF power density is presented. The average of the density in broadband (1GHz-3.5GHz) is in the order of -12dBm/m² (63µW/m²). Two systems have been studied to recover the RF energy. The first is a broadband system without matching circuit. The second is a narrow band system (1.8-1.9GHz) with a matching circuit. The rectifier circuit RF / DC and the choice of the load to optimize the DC power recovered are presented. The preliminary results indicate that the recovered energy is not sufficient to directly power devices but could be stored in a super-capacity or micro-batteries.
An integration scheme for rf power harvesting
Proc. STW Annual …, 2005
This paper describes an integration scheme for RF energy harvesting. The scheme includes a resonant voltage boosting network, which provides high amplitude swing from a small signal; and a rectifier that produces DC voltage. Design issues are addressed. Testing circuits are implemented in a Silicon-on-Glass technology. Simulation results show that a DC voltage of 0.8 V can be achieved at -20dBm input energy level at 868.3 MHz ISM band. This would correspond to a potential working distance of 10 meters. Fig. 2. Simple resonant tank
INVESTIGATING TECHNIQUES AND RESEARCH TRENDS IN RF ENERGY HARVESTING
IAEME PUBLICATION, 2014
For more than two decades, there were extensive research activities towards harnessing the energy captured from the natural resources and use it for human utility. This field of research, commonly known as energy harvesting, has various characteristics and subsidiary applications. Presently, it is seen that use of mobile phones are increasing due to the advancement of communication systems and numerous services incorporated within it make the availability of free RF signals. This paper discusses various techniques and attempts initiated by research community in harnessing this free RF signals for the purpose of energy harvesting to power up low-powered electronic devices and embedded systems. It also presents some of the most significant research procedures that use RF signals for harvesting energy and their implausible research gap.
A Multi-Band Stacked RF Energy Harvester With RF-to-DC Efficiency Up to 84%
IEEE Transactions on Microwave Theory and Techniques, 2015
The aim of this paper is to show the possibility to harvest RF energy to supply wireless sensor networks in an outdoor environment. In those conditions, the number of existing RF bands is unpredictable. The RF circuit has to harvest all the potential RF energy present and cannot be designed for a single RF tone. In this paper, the designed RF harvester adds powers coming from an unlimited number of sub-frequency bands. The harvester's output voltage ratios increase with the number of RF bands. As an application example, a 4-RF band rectenna is designed. The system harvests energy from GSM900 (Global System for Mobile Communications), GSM1800, UMTS (Universal Mobile Telecommunications System) and WiFi bands simultaneously. RF-to-dc conversion efficiency is measured at 62% for a cumulative 10-dBm input power homogeneously widespread over the four RF bands and reaches 84% at 5.8 dBm. The relative error between the measured dc output power with all four RF bands ON and the ideal sum of each of the four RF bands power contribution is less than 3%. It is shown that the RF-to-dc conversion efficiency is more than doubled compared to that measured with a single RF source, thanks to the proposed rectifier architecture.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2011
A fundamental element of the CLIC concept is two-beam acceleration, where RF power is extracted from a high current, low energy drive beam in order to accelerate the low current main beam to high energy [1]. The CLIC Power Extraction and Transfer Structure (PETS) is a passive microwave device in which bunches of the drive beam interact with the constant impedance of the periodically loaded waveguide and excite preferentially the synchronous mode. The RF power produced is collected downstream of the structure by means of the RF power extractor; it is delivered to the main linac using the waveguide network connecting the PETS to the main CLIC accelerating structures [2]. The PETS should produce 135 MW at 240 ns RF pulses at a very low breakdown rate: BDR o 10 À 7 /pulse/m. Over 2010, a thorough high RF power testing program was conducted in order to investigate the ultimate performance and the limiting factors for the PETS operation. The testing program is described and the results are presented.
A Survey on Conceptualization of RF Energy Harvesting
Journal of Applied Science and Computations, 2019
Radio Frequency Energy Harvesting (RFEH) and Wireless Power Transfer (WPT) techniques have recently attracting huge attention and hold a promising future to generate power to the next-generation wireless networks. As these emerging technologies enable proactive energy replenishment of wireless devices and offers various environmentally friendly alternative energy sources. The Simultaneous Wireless Information and Power Transfer (SWIPT) is an advanced way to deliver electrical energy for mobile devices. Extensive research conducted in SWIPT systems. On the other hand, most former works mainly focus on energy harvesting over a relatively narrow frequency range. RF energy has remarkable key features that make it very attractive for low-power consumer electronics and Wireless Sensor Networks (WSNs). Ambient RF energy is present in various frequency bands such as DTV (550-600MHz), LTE (750-800MHz), GSM900 (850-910MHz), GSM1800 (1850-1900MHz), UMTS (2150-2200MHz), Wi-Fi(2.4-2.45GHz), Band for radio & television applications (900MHz-2GHz), ISM (2.1-2.6GHz), UWB (3.1-10.6GHz), WLAN (3.1-4.4GHz), HIPERLAN (5.1-5.3GHz), C-BAND (4.4-5GHz) etc. The RFEH network has a sustainable power supply from a radio environment. High-efficiency rectennas for RFEH have been studied for decades, but most of the literature addresses the rectennas aiming at dedicated RF sources, antenna designs for collecting large ambient RF power, the improvement of Power Conversion Efficiency (PCE) has emerged in a scattered way. Because the theoretical limit of PCE has not yet been described and the optimal rectenna structure approaching such maximum PCE is still un-investigated. Here we discuss general idea of the RF Energy Harvesting Networks (RFEHNs) including system architecture and existing applications. We also explore various key design issues in the development of RFEHNs. This summary serves as a guide for the design of RF energy harvesting units; it gives the potential to user in a new generation of the self-powered devices.
A dual band 915MHz/2.44GHz RF energy harvester
2015 European Microwave Conference (EuMC), 2015
This paper presents the development of a dualband rectenna optimized to convert far-field RF energy to DC voltage at very low received power. Implemented on a standard FR4 substrate with commercially off-the-shelf (COTS) devices, the RF harvester provides a rectified voltage of 1V for a combined power of-19.5dBm at 915MHz and-25dBm at 2.44GHz. The remote powering of a clock is demonstrated, and the rectenna yields a power efficiency of 27%.