Design of radio frequency energy harvesting system for an unmanned airplane (original) (raw)

Wireless Charging of Mobile Battery via Optimization of RF Energy Harvesting System

— RF energy harvesting is a field whose time has come and its possibilities need to be explored. RF energy is everywhere. We are being bombarded with Radio Frequency energy which is emitted by sources that generate high electromagnetic fields such as TV signals, wireless radio networks and cell phone towers. Even it is new idea, many researches have been done for the optimization of RF energy harvesting system. Many of the works are related with regard to the optimization of antenna, some are with matching network and voltage doubler circuit. Those research in which matching network is concern, the author has done matching without considering the diode in the circuit, i.e. only considering capacitor and resistor because matching the diode is not straightforward. What we have done is matching the circuit with considering diode in the circuit in the Agilent ADS software. With regard to RF-DC conversion, voltage doubler, we have used Greinacher voltage doubler circuit and simulated it in ADS software up to 9 stage circuit. For the optimum stage of voltage doubler, it should be greater than 4 (n>4) and first stage capacitor should be double of the rest capacitor. With regard to the result for this paper, we have used 5 stage voltage doubler so as to trade-off between output voltage and output current. The simulated result is, at 0 dBm Vout is 1.8 V and Iout is 0.1814 mA, at 10 dBm V out is 7.77 V and Iout is 1 mA and at 20 dBm V out is 17.88 V and I out is 2 mA. Moreover, it can be concluded analysing the effect of distances between Tx and Rx antennas on the RF energy harvesting system and on the output by Friis Transmission Equation, which is that at 10 cm, the small battery can be charged in a day.

A Review on the Contemporary Research on Radio Frequency Energy Harvesting

International Journal of Engineering & Technology, 2018

Radio Frequency harvesting has recently become one of the alternate approaches to power up low power wireless networks. This evolving technology opens the gate for positive energy renewal for wireless components. This paper presents a comprehensive review which includes all the important components in a RF energy harvesting system which are microstrip patch antennas, rectifier modules and power management modules. Different types of microstrip patch antennas and its designs and outputs are discussed. Rectifier modules with Schottky diodes operating under two different frequency bands are also compared and discussed. In addition, different methods of available power management circuits with different methods are also deliberated in this paper. This review also explores various key design issues and envisions some open research directions.

Review Paper on RF based Energy Harvesting System

Communications on Applied Electronics

As the law of conservation of Energy states that energy can neither be created nor be destroyed, it can only be converted or transformed from one form to another, moreover there are various sources of energy like solar, wind, geothermal etc. The purpose of this paper is to put light on radio frequency based energy harvesting systems. The said RF energy is currently transmitted from various sources/transmitters which include mobile base stations, mobile, telephone, TV/radio broadcast stations and handheld radios. The propensity to gather or harvest RF energy from the committed sources empowers or authorizes wireless charging for low power appliances or devices which furthermore results in better product design dependableness and utilization. The battery operating systems can be charged gradually and slowly to abolish battery replacements or to extend battery durability disposable batteries can be used. The battery free systems i.e. RF energy based devices can be designed to work upon availability i.e. when the sufficient charge is accumulated. In all the cases mentioned above the devices or the appliances can be operated without the usage of cables battery panels connectors which can make these devices more mobile and portable while operation and charging as well. All this and more can be achieved by RF based energy harvesting and main cause or reason to harvest RF based energy is that it is consequentially FREE energy. The sources of RF energy are increasing day by day like mobile based transmitters from which more and more energy can be harvested. This paper more importantly focuses on parameters to design the system, methods, different frequency ranges that can be utilized and the respective circuitry for converting Low voltage output to High voltage for various applications using RF based energy harvesting.

Design & Analysis of RF Energy Harvesting System for Energizing Low Power Device

Journal 4 Research - J4R Journal, 2016

Finite electrical battery life is encouraging the companies and researchers to come up with new ideas and technologies to drive wireless mobile devices for an infinite or enhance period of time. Common resource constrained wireless devices when they run out of battery they should be recharged. For that purpose main supply & charger are needed to charge drained mobile phone batteries or any portable devices. Practically it is not possible to carry charger wherever we go and also to expect availability of power supply everywhere. To avoid such disadvantages some sort of solution should be given and that can be wireless charging of mobile phones.[4] If the mobile can receive RF power signals from the mobile towers, why can " t we extract the power from the received signals? This can be done by the method or technology called RF energy harvesting. RF energy harvesting holds a promise able future for generating a small amount of electrical power to drive partial circuits in wirelessly communicating electronics devices. RF power harvesting is one of the diverse fields where still research continues. The energy of RF waves used by devices can be harvested and used to operate in more effective and efficient way.

Optimization of Passive Low Power Wireless Electromagnetic Energy Harvesters

Sensors, 2012

This work presents the optimization of antenna captured low power radio frequency (RF) to direct current (DC) power converters using Schottky diodes for powering remote wireless sensors. Linearized models using scattering parameters show that an antenna and a matched diode rectifier can be described as a form of coupled resonator with different individual resonator properties. The analytical models show that the maximum voltage gain of the coupled resonators is mainly related to the antenna, diode and load (remote sensor) resistances at matched conditions or resonance. The analytical models were verified with experimental results. Different passive wireless RF power harvesters offering high selectivity, broadband response and high voltage sensitivity are presented. Measured results show that with an optimal resistance of antenna and diode, it is possible to achieve high RF to DC voltage sensitivity of 0.5 V and efficiency of 20% at −30 dBm antenna input power. Additionally, a wireless harvester (rectenna) is built and tested for receiving range performance.

A Simple Concept of Energy Harvesting Using Radio Frequency

MATTER: International Journal of Science and Technology, 2017

Energy harvesting is a process where certain sources is extracted and converted into DC output by connecting relevant circuits. This energy harvesting technique can reduce the usage of electricity for small power consuming devices. Some of the techniques of energy harvesting is solar energy, wind turbine, radio frequency and vibrations. Radio frequency energy harvesting can be done from the surrounding sources or from dedicated sources. This energy harvesting consists of several stages processing which starts with a 50ohms radio antenna, matching network and rectifier circuit and end as product of DC output. The proposed technique of energy harvesting is by connecting the radio antenna to an L-matching network and then to a single

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.

RF energy harvesting prototype operating on multiple frequency bands with advanced power management

Indonesian Journal of Electrical Engineering and Computer Science

Radio Frequency (RF) harvesting seems to be catching up as an alternate energy source whereby RF energy is scavenged from ambient sources and converted into renewable energy in terms of DC power. This converted DC power is then utilized to power up devices that require a low start up power in which eliminates the need for battery replacement. In this paper, a novel RF energy harvesting prototype is presented which consists of two microstrip patch antennas operating on GSM (900MHz) and WIFI (2.4GHz) & WiMAX (2.3GHz) frequency bands with a bandwidth of 220MHz and 10.11MHz respectively to harvest RF signals from ambience. Two matching networks are presented as well to ensure efficient power transfer to load. Rectifiers are designed to transform the RF signals to DC power. The converted DC signals are then combined and fed to a power management circuit which charges a 4.2V NiMh battery and drives a load at a regulated output of 3V.

IRJET- Design of RF Energy Harvesting of 900 Mhz for Mobile Charging

IRJET, 2021

This paper focuses on the design of RF energy harvesting circuit using the 900 MHz microstrip patch antenna and therefore the Schottky diode rectifier. The aim of this circuit is to rework the radio frequency signals within the GSM frequency band to DC (DC) voltage. This research also provides a suggestion for the design of the 900 MHz microstrip patch antenna utilized in the circuit. The rectifier design is predicated on the doubler circuit of Villard voltage developed at 900 MHz. Three-stage voltage doubling is modeled and simulated in this project. The proposed antenna harvests the RF power and transforms it into DC voltage ranging up to 7.5 V which will be utilized in low-power DC applications.