THESIS STATEMENT/PURPOSE STATEMENT

[1] Optimization of the Voltage Doubler Stages in an RF-DC Convertor Module for Energy Harvesting

ABSTRACT

This paper presents an optimization of the voltage doubler stages in an energy conversion module for Radio Frequency (RF) energy harvesting system at 900 MHz band. The function of the energy conversion module is to convert the (RF) signals into direct-current (DC) voltage at the given frequency band to power the low power devices/circuits. The design is based on the Villard voltage doubler circuit. A 7 stage Schottky diode voltage doubler circuit is designed, mod-eled, simulated, fabricated and tested in this work. Multisim was used for the modeling and simulation work. Simulation and measurement were carried out for various input power levels at the specified frequency band. For an equivalent incident signal of –40 dBm, the circuit can produce 3 mV across a 100 kΩ load. The results also show that there is a multiplication factor of 22 at 0 dBm and produces DC output voltage of 5.0 V in measurement. This voltage can be used to power low power sensors in sensor networks ultimately in place of batteries.

Thesis Statement:

This paper presents an optimization of the voltage doubler stages in an energy conversion module for Radio Frequency (RF) energy harvesting system at 900 MHz band.

From the Title:

By the utilization of Radio Frequency it gives the signal whenever the Direct Current begins to power up the low voltage and measures various power of specified frequency.

[2]Development of a New Cascade Voltage-Doubler for Voltage Multiplication

ABSTRACT

For more than eight decades, cascade voltage-doubler circuits are used as a method to produce DC output voltage higher than the input voltage. In this paper, the topological developments of cascade voltage-doublers are reviewed. A new circuit configuration for cascade voltage-doubler is presented. This circuit can produce a higher value of the DC output voltage and better output quality compared to the conventional cascade voltage-doubler circuits, with the same number of stages.

Thesis Statement:

In this paper, the topological developments of cascade voltage-doublers are reviewed. This circuit can produce a higher value of the DC output voltage and better output quality compared to the conventional cascade voltage-doubler circuits, with the same number of stages.

From the Title:

Out from coventional casade voltage doubler circuit, this new casades improves the development of new voltage multiplier that gives off twice a number of an input voltage into output voltage and multiplication.

[3] Optimization of Voltage Doublers for Energy Harvesting Applications

ABSTRACT

Energy harvesting is increasingly enabling the expansion of wireless sensor networks in challenging applications by replacing batteries in low power sensors. Many forms of energy harvester suffer from low output voltage that can be partially compensated for by the use of a Cockcroft-Walton voltage doubler ahead of a dc-dc converter. Impedance matching of energy harvesters is critical to achieve high output power/unit volume. This paper explores optimum impedance match for an energy harvester with a voltage doubler and dc-dc converter. Formulas are derived and experimentally confirmed, which calculate optimum impedance match between the harvester and a load, and calculate voltage at the input to the dc-dc converter for a given wireless sensor power consumption. Further, the formula for optimum impedance match is validated against independently published results.

Thesis Statement:

This paper explores optimum impedance match for an energy harvester with a voltage doubler and dc-dc converter. Formulas are derived and experimentally confirmed, which calculate optimum impedance match between the harvester and a load, and calculate voltage at the input to the dc-dc converter for a given wireless sensor power consumption. Further, the formula for optimum impedance match is validated against independently published results.

From the Title:

Energy Harvesting by default it enhace the expansion wireless application a means of replacing batteries from a lower power detector and effective voltage doubler.

[4] A COMPARATIVE STUDY: VOLTAGE MULTIPLIERS FOR RF ENERGY HARVESTING SYSTEM

ABSTRACT

 Voltage multipliers are widely used for energy harvesting processes to convert the received AC signal to DC signal, also enhanced the low level received signal. In this study, Villard, Dickson and Greinacher type voltage multipliers are analyzed without impedance matching and substrate materials to decide the effective voltage multiplier type depending on the inputs of the harvester. So, load resistance, input power and input frequencies’ effects are analyzed and compared with each other. Agilent Advanced Design System (ADS) is used for simulations. HSMS 2852 Schottky diode and capacitors are used for these voltage multipliers. Results show that, determining load resistance is important for evaluating high efficiency, e.g. efficiency differences are reached 33% between 2kΩ and 20 kΩ for Dickson voltage multiplier at 100 MHz input frequency. Furthermore, the best efficiency is obtained by Greinacher voltage multiplier for low input frequencies which is lower than 1 GHz but there are no significant differences are observed for high frequencies. This study shows that load resistance, input frequency and input power are important parameters for voltage multiplier selection and Greinacher voltage multiplier is the best choice to obtain high efficiency for low frequency application of RF harvesting.

Thesis Statement:

In this study, Villard, Dickson and Greinacher type voltage multipliers are analyzed without impedance matching and substrate materials to decide the effective voltage multiplier type depending on the inputs of the harvester.

From the title:

Simply indicate that voltage multiplier is the best choice to obtain high efficiency while energy harvesting is to increasingly enables to partially compansated the output voltage as the result.

[5] Low Cost DC High Voltage Generator for Industries and Laboratories

ABSTRACT

This work describes the details of high voltage D.C. power supply whose output is 60 kV, whereas its input voltage is 1-Φ 50 Hz 5 kV of sinusoidal waveform. This

test set is suitable for field testing of high

voltage cables, as a prime D.C source for very low frequency high voltage test, oscillating wave technique and impulse voltage charging unit due to its light weight and portability. In this study, we constructed a prototype high voltage power supply based on design, simulation and implementation of hardware work in laboratory. The simulation work has been done by using Mat. Lab.

Thesis Statemeng:

In this study, we constructed a prototype high voltage power supply based on

design, simulation and implementation of hardware work in laboratory.

From the Title:

A very functional Direct Current while on a High voltage that lower a cost in laboratories that ensure generated supply.

BALAK

SA LAPUKONG MATA SA LANGIT
By: Michael Obenieta

Ulan mihagsa, ug misaka-sayaw ang abog. Samtang miindak-indak ang han-ay sa mga tiil nga gamitoy, mikinto tingali ang mga higante. Ibabaw sa dahong ga lutaw, duha ka hulmigas. Unsa man kita wa'y imik nga nagpunsisok dinhi sa atong ge pasilongan samtang galantaw sa lunop Sa lapukong mata sa langit?

SA ATONG PANAGKUYOG

By: Michael Obenieta

Ayaw kahibulong sa atong panagkuyog, kutob ra ko's hunghong, ug nganong ang akong mga bukton sa imong abaga dili motugdon. Kini tingali kay ang imong kasingkasing hugot nakong gihuptan sa tuo kong kamot samtang ang pikas gasukod, gadangaw sa gilapdon sa panganod. Kon bug-at og kamot ang pangangayam, kining gugma ko gaan samas' langgam.

How the Barangay got its name?

Barangay Tomas Cabili the story untold

Barangay Hall 

Its been a while how our ancestors best described and explained to us the Legend that left as a mark of Barangay Tomas Cabili told us thrilling tales behind the aforementioned Barangay whose origin remain unknown. According to the recent Barangay administration Secretary said that it was therefore named after an American Calvary officer "Tommy" who used to visit the place regularly on a horse or simply the place is called "Nagtubo" which means it grow. Although the certain Barangay's population is fast increasing and growing.

It could bot be a hilarious story to tell because of the reason it must undergo due process if law for legality to govern its sovereignty. First step, Barangay Tominobo was created by vitue of a resolution no. 58, series 1967 of the city council of Iligan a d city ordinance no. 337 which was approved on December 31, 1967.

Sen. Tomas L. Cabili

On 1978, Kagawad Feliciano L. Palos was trying to amend a resolution the Barangay council of Tominobo passed and approved. Secondly, by changing its name from Barangay Tominobo into Barangay Tomas L Cabili in honor of late Senator from Iligan City to commemorate his greatness in the past years. This was being presented during the Barangay Assembly it seems like no one or without a single opposition.

It was also presented at the Batasang Pambansa helding by Assemblyman Henry Y. Regalado of Misamis Oriental as the main sponsor because that time, Assemblyman Abdulah Dimaporo was not able to pre-occupy the sit under election pre-proclamation protest.

Finally on March 16, 1892. The former President Ferdinand E. Marcos that time signed the Batasang Pambansa No. 196 into law. Since then the act renaming Barangay Tominobo to Barangay Tomas Cabili.

We may be had our own version of naming a certain places that would come up into many interpretations. At the same time it made me have a second thought of how ironic those legend were a part of developing and forming a well established areas that play significant value along the time before it has been recognized by the society.