Microwave power transmission using rectenna

Microwave power transmission using rectenna   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Abstract microwave power transmission using rectenna A high efficient rectanna was design and tested at 5.8GHz frequency, which is use to power up applications. Patch antenna used with a low return low simulated in ADS. The micro-strip patch is a good practice for manufacturing physical antenna, as it will be easy to fabricate. The designed patch antenna have been employed in a 22 and 14 triangular antenna array so that the power and gain can be increased. The patch antenna captures the RF signal and then feed through 50 ohm feed line into the low pass filter and then into the rectifying circuit giving DC power. A low pass filter at 5.8 GHz was constructed. The diode used for the rectifying circuit is HSMS 2862 or HSMS 2080 schottky. A comparison analysis has been done between different designs of antenna. The results compared and best possible DC voltage was achieved in ADS simulation. ADS results achieved by simulating the designs for antennas, low pass filters and rectifying circuits were efficient. The designs were manufactured. The result generated from the physical antenna and the simulation is studied. Chapter 1 1 Introduction As the technology is growing the world is now moving toward wireless power. We can see that now days everyone prefers to use a wireless mouse or a wireless headphone. The use of batteries can make this possible but the problem is that too many batteries are being used and there has to be a way by which these applications can run wirelessly and the best thing would be if the batteries were not used. How can this be possible? This is the problem which we will try to solve in the design. The rectanna used will convert the RF power into dc signal and instead of batteries the application will have a rectanna to produce the power. Therefore we will have a true wireless system, which has no wires and no batteries. Although we have to agree that may be so power will not be produced by these rectanna but still as the technology increase, the rectanna manufacturing will also be improved. The word ‘rectenna as we know today was first introduced by Brown [4]. The basic concept of rectanna is a â€Å"rectifying antenna†. In other word an antenna which will be used for receiving RF signal and a rectifying circuit which is used to give us DC power. Personally I view rectanna as a wireless battery, which is a very cool device. Wireless power transmission (WPT) can be viewed as an electrical grid which generates power. WPT is the technology which is used for wireless transmission of power, this will be used in future for solar power satellites [4]. Let me explain the concept in detail. As the satellites are orbiting around the earth 24 hour and the satellites have the capability to convert the solar power into RF signals and then beam those RF signal to the earth. Array of antennas will be used to capture those RF signals and the rectifying circuits to convert those into DC power. If sufficient amount of array antennas are used, a lot of power can be produced. The electrical power station would be viewed as RECTANNA stations where RF signal would be converted into DC power. 1.1 History of Microwave Power Transmission Tesla was the first person who introduced the idea of wireless power transmission. Tesla was not able to produce power with the RF signal because the transmitted power got diffused in all the direction with 140 KHz radio signal [4]. The problem faced by Tesla was overcome, by the fact that higher RF frequency has greater directivity and so the power can be transmitted in a particular direction. Radar technology used in world-war 2 was also very helpful in advancing the growth of wireless power. In the early 1960s W.C. Brown used that latest technology to produce wireless power for the first time. The word â€Å"Rectanna† which we use today was first developed by W.C. Brown. He used an antenna with a rectifying circuit to produce power. The conversion was very good. Based on browns research work, where P.E. Glaser in 1968 introduced a solar power satellite [4] [3]. 1.2 Objectives The object of this thesis is to design a rectanna which will be able to receive microwave energy at 5.8 GHz and then converting that signal to DC power. This thesis will also help to provide a new ways of exploring energy resources. A secondary objective is to reduce the return losses so that maximum output can be achieved. A comparison analysis is done between series and parallel configuration of the 5.8ghz antenna. 1.2.1 Scope of thesis: Perform a good and comprehensive literature review so that all the concepts of RF electronics could be understood. Understand different antenna designs and test them to get the best possible result. Simulating and creating a functional micro-strip patch antenna design suitable for the rectenna frequency of operation of 5.8 GHz. Designing, simulating and creating the rectifier circuit. 1.3 Thesis Outline The thesis was completed in two semesters. Each a certain number task must be completed. Semester 1: Involves literature review of patch antenna, low pass filter and rectifier. The array of antenna design will also be taken under consideration and will be tested and simulated in ADS software and a prototype of 44 circular and triangular patch antenna will be build for testing purpose. Semester I Introduction to the topic Finding the research papers and resources Literature review Design proposal Simulation in ADS Operational system in ADS Prototype for testing Semester 2: The 2nd semester was utilized to make better designs and operation of antennas. Rectifying circuit will be improved as well. An application will be tested, so that the patch antenna can be used to power a small application. Semester II Tweaking of the design Making system efficient Measurements and results Comparison analysis of design Documentation and final report Chapter 2 2 Introduction To Literature Review This section outlines brief theory of micro-strip patch antennas .. The library resources were used extensively and the journals related to the power transmission using rectanna were studied in detail. The articles were used to get idea about the design as well as methods of adapting the microwave techniques. 2.1 Motivation The possibility of transferring power wirelessly can open up infinite applications. The fact that wireless application will not be powered by the batteries but instead use RF signal to generate the power is so extraordinary that everyone would want to be a part of the technology. The idea of using the solar space satellites to create power is not very new. It was first presented in 1968 by Peter E. Glaser [4] [3]. The area of wireless power is not only limited to power generation by satellites but in fact it can be used in daily electronics, such as a wireless headphone, wireless keyboard, wireless mouse and even in wireless small motors. This research will give me a glimpse of future technologies that lies ahead of us. 2.2 What I Want to Achieve At the end of this thesis I hope to have a rectenna which will convert RF signals into DC power and that DC power will be used for any selected application. 2.3 Important Points About Antenna An antenna is device which is made so that it can radiate and receive radiating power from the electromagnetic wave. There are some important points that we need to know about antenna before proceeding towards the main antenna design. 2.3.1 Antenna gain: The ratio of input power to the output power is called antenna gain. 2.3.2 Directivity: The property of antenna to radiate electromagnetic waves in a particular direction is called directivity. If the electromagnetic waves are concentrated in a particular direction then we can that antenna has good directivity. Directivity and gain are related to each other by the following formula. Gain = efficiency/Directivity. 2.3.3 Polarization: The phenomena of polarization can be understand as the orientation of electromagnetic waves at distance from the source. The polarization types have been show in the table below. 2.3.4 Impedance Matching: The energy transfer can only be possible if the antenna and the transmission lines are matched. Typically 50 ohm impedance is used for the radio. If the antenna is not match then the input power or the output power will be reflected back. As a result power will be lost and desired results will not be achieved. 2.3.5 VSWR and the Reflected power of antenna: The voltage standing wave ratio (VSWR) is a parameter, which tells us that how good the impedance match is done. A VSWR of 2:1 is considered good. Most of the antennas which are built have a VSWR of 1.5:1. Chapter 3 3 Rectenna design 3.1 Introduction to rectenna The above diagram shows a basic design of a rectanna. The antenna receives the RF signals. The signal is passed to the low pass filter by a transmission line which has an impedance of 50 ohm. The low pass filter will filter the desired frequency so that unwanted frequency does not go through the rectifying circuit. The low pass filter is also used to stop the harmonics reflected back from the diode. The rectifying circuit is used in double configuration. The double configuration is used so that maximum RF signal can be converted into DC power. Schottky diodes will be used in the rectification process as they have low voltage drop across it. The overall efficiency of the rectanna can be determined by ?= PdcPinc, Pdc is the DC output power. Pinc is the Incident RF power 3.2 Operating frequency The most common frequency used is 2.45GHz and 5.8GHz. The directivity of antenna is more at 5.8GHz. Over all a lot of applications are available at these frequencies. 3.3 Substrate Material Taconic TLX-0 was used for the physical design of the antennas. It has the following properties: H = 0.787 mm(height) T = 17  µm er= 2.45 TanD = 0.0019 Taconic TLX-0 laminate are low loss antennas.[8] 3.4 Design Specifications Chapter 4 4 Array Antennas and Design: 4.1 Introduction to Array Antennas and Design In this section is related with the antenna design in detail and the array antenna design for achieving greater power. 4.2 Micro-strip Patch Antenna The patch antenna is triangular. It has 3 layers. The bottom layer is the ground, middle is the dielectric substrate and the upper layer which is made up of copper or gold. As you can see in the figure, the 3 layer are shown. The patch antenna radiates because of the fringing fields between the ground and the patch. For good performance the thick dielectric should be used with a low dielectric constant [13]. As the design does not allow us to use a thick dielectric, otherwise the size of the antenna would be very big, so in our design a thin dielectric with high dielectric constant would be used. A micro strip antenna has some advantages and some drawback. Some of the advantages and drawbacks are given in the table. ADVANTAGES OF MICROSTRIP ANTENNA Light weight and have low volume with low profile. Fabrication cost is low, easily manufactured in big quantities. Circular and Linear polarizations can be made in them. Dual frequency and dual-polarization is also possible with this. Microwave integrated circuits can be integrated with them as well. The antenna structure can be fabricated with Feed lines and matching networks within. Figure 7 Advantages of microstrip DISADVANTAGES OF MICROSTRIP ANTENNA Bandwidth Narrow Lower gain Large losses with the feed structure. Cannot be high power handling capacity Figure 8 Disadvantages of microstrip 4.3 Feed Technique There are two types of feeding techniques Contacting: In this type feed network the RF signal is feed directly into the patch antenna. Non contacting: In this configuration electromagnetic field coupling occurs due to transfer of energy between the line of mirco-strip and the patch. 4.3.1 Micro-strip Line Feed As you can see in the figure the simplest way of having a feed line is to attach a transmission line feed with the edge of the antenna. This feed line technique is very useful as the feed line and the antenna are both on the same plane. The structure is on the same surface and area is also reduced. It has a better utility as now the antenna (with the feed line) can be place in numerous applications. The thickness of the feed line determines the impedance of the line. 4.4 ANALYSIS 4.4.1 Triangular patch antenna : As we know that lots of work have been on rectangular patch antennas and the circular patch but for my design I will be using a triangular patch so that the radiation pattern and the return losses can be studied. The size of the triangular patch is smaller than the rectangular patch, so a much more efficient design. The design formulas are, in the later sections of the report. 4.4.2 Design specifications 4.4.2.1 TRANMISSION LINE MODEL : In my design I have used the transmission line model to develop the concepts and theory behind the triangular patch antennas the equilateral triangular patch was also design using the transmission model. Resonant frequency The resonant frequency is given by [14] fr=ckmn2pEr =2c3aEr(m2 +mn+n2)1/2 1 In the above equation c is the velocity of the light in the free space. Er is the dielectric constant and K(mn) are the different modes of harmonic order. The lowest order resonant frequency given by [14] fr=2c 3aEr2 The effect of fringing field was not consideration in the above equation. The fringing field occurs at the antenna patch edge. In our case the fringing field will occur at the edge sides of the equilateral triangle. The fringing fields are depended on the physical dimension of the triangular patch and the height of the substrate material. The figure below shows the field lines of a micro-strip antenna. The maximum amount of field lines are going into the substrate and some of them are in the air. The side of a patch is increased due to the fringing field effect. The side length of a triangular patch antenna will no longer will be the same as we have to take account of the effective dielectric constant Ee. The modified equations are given below. The equation above does not take given very accurate results, as it does not consider the fringing fields produced by the antennas. The Er in equation (1) and (2) can be replaced by effective dielectric constant. The dielectric constant given by [14] Ee=Er+12+Er-14(1+12h/a)-12 3 Similarly the a can be replaced by aeff (effective). The value of the aeff (effective) given by [14] aeff=a+hEr -4 Where h is the height of the material Thus equation 2 can be replaced with the effective value of aeff and Ee giving us the final equation given by [14] fr=2c 3aeffEe5 4.4.3 Excitation technique: 4.4.3.1 Micro-strip feed: The location of feed point is determined according to dimension of the antenna. Once we have calculated the accurate dimension of the antenna then we have to connect it with a 50ohm transmission line. In my design I will be using the center fed for the patch antenna. There are two ways to do this. The first is using a quarter wave transformer and the 2nd is to use the inset model. 4.4.3.2 INSET MODEL: A triangular patch antenna was designed using the inset model. The advantage of using the inset model is that the size of the antenna reduces as compared to the quarter wave transformer design [14]. The length of the triangular patch is d. the length of transmission patch is l and the width of the transmission patch is w. the width and length of transmission patch if design do that a 50ohm impedance can be achieved. 4.4.3.3 Quarter Wavelength Transformer The quarter wave transformer is a system which is used to match the impedance. As we know that the resistance Rin of the antenna will not matched with the feed line which has a impedance of 50 ohm. A formula is used to calculate the impedance of the quarter wave transformer. 4.5 Antenna design The calculation for different antennas was designed in ADS. And the result will be shown in much detail the later sections of the report. The operating frequency is 5.8GHz. The result show in the table below is for triangular patch. 4.6 Introduction to Array theory The range of the system can be increased by array of antennas which are working together and the focus of the reception or transmission of energy also increase in a particular direction[10]. The antenna in an array can be manufactured on a micro-strip with a feed network and a power divider. There are two kinds of feed network in array antennas Single line(series feed network) Multiple feed network The series-feed network in an array of antennas is limited with a fixed beam[13]. We can see that series feed is easy to manufacture as it has the same configuration which repeats. There is a major disadvantage, any change to a single element can affect the remaining elements. The antenna elements are fed by a 1 to N (in corporate network).The power divider network has a identical path lengths to all the elements, from the feed point [13]. The phase of the element can be controlled in the corporate network with the help of phase shifters. Amplifier can be used to fix the amplitude [13]. 4.6.1 The Array Factor The array factor depends on Number of elements Element spacings Amplitude Excitation phase which is applied to each elements within the array 4.6.2 Array design As we see in the previous section that that array design is deeply affected by the element of spacing, so for 5.8 GHZ antenna the wavelength is 51.72mm, based on these factors the element spacing for 5.8GHZ antenna the element spacing should be 38.79mm. We can see that the element spacing is 0.75 % of the given wavelength. As we can see in the below figure that the quarter transformer is matched with antenna which has a impedance of 100ohm. The 100ohm line are combined together and gives a resulting impedance of 50ohm at the meeting point of the line. In the last the two 100ohm lines are combined to give a 50ohm impedance which is same for a feed line. 4.6.3 Metering of Corners In our design we are using a microstrip. So with the mircostrip antennas, the 90% angle at any corner can cause large reflection from the 90% degree angle. So a smooth edge has to be made, so that there are no reflection losses. To reduce the reflection factor the edges are metered at the corner so that there is a smooth flow of current. A equation can be used to metered the corners which is given by the equation below. 4.7 Simulation results in ADS 4.7.1 Single triangular patch 4.7.1.1 Single triangular patch : 4.7.2 Single patch with inset model: 4.7.2.1 Single patch with inset model: 4.7.3 2X2 triangular patch with inset model: 4.7.4 14 linear triangular patch: 4.7.5 Single patch with quarter wave transformer 4.7.6 22 triangular patch with quarter wave transformer CHAPTER- 5 LOW PASS FILTER 5 Low Pass Filter 5.1 Introduction to low pass filter In this chapter we will discuss the low pass filter and why is it important for the rectanna design. The techniques which will be used and calculation used to make a low pass filter. The results which are calculated by the ADS calculation will also be show in this section. 5.2 Theory behind LPF The antennas which were designed in the previous section was for 5.8Ghz but still some extra frequencies have to be filtered. The rectifying circuit also cause reflection from the first harmonics. To stop those reflection from the diode, LPF is used. LPF is extensional for the design as it can increase the power of the antenna. The LPF block the signal coming back from the diode and so the phenomena of re-radiation does not occur. The LPF is usually designed for the lower frequencies. We can use lamped component for the design but there is a problem with that. The lamped component can also cause reflection, so SMT components should be used to avoid the reflections from the inductor or the resistors. There is another good way, instead of using lumped component, the LPF can also be designed on the same transmission line by using Richard transmission. I think it would be the best thing for our design because then we would be able to make the design on the same surface. The whole design would have the same physical platform and planer surface can be achieved. There are two kinds of low pass filter which we can use in our design. Equal ripple Maximum flat 5.3 LPF Design The filter can be designed by using â€Å"Richardson method from chapter of Micro-wave engineering by david pozar[9]. We have to get the values from the table then Richard transformation is used to get the series inductors and the stub used and the shunt capacitors to shunt stubs. For Richard ?/8 at ?= ?C. Then the 2nd step would be to use the kuroda identity to series stub and shunt stubs. For the frequency of ?/8 at 2.45 GHz) and (?/8 at 5.8 GHz) we need to apply the impedance and the frequency scaling to get the accurate value. 5.3.1 Equal ripple low pass filter 5.3.2 Maximum low pass filter 5.4 Simulation results from ADS 5.5 LPF AT 5.8GHZ 5.5.1 LFP EQUAL RIPPLE (5.8GHZ) 5.5.2 LPF MAX FLAT(5.8GHZ) CHAPTER 6 6 RECTIFYING CIRCUIT FOR RECTENNA 6.1 INTRODUCTION TO RECTIFYING CIRCUIT FOR RECTENNA The final stage of the rectenna design is the rectanna which actually converts the RF signal into the DC voltage. As the diode has its own impedance so we have to match the impedance of the rectifying circuit as well. The method by which the impedance was match and the results obtained from the ADS simulation will be looked. 6.2 Single Rectifier design The single diode configuration is very easy to understand. In the positive wave of the AC signal the diode d5 is forward biased and the capacitor is being charged. When the negative wave come, the diode is reverse biased and no current crosses the diode and at that time the capacitor is providing the voltage. As the capacitor is providing the voltage we have small ripples in the simulation and in practical applications. 6.3 Single voltage quadrupler: The quadrapler provides 4 times the voltage as campared to the single rectifying circuit. The configuration is easy to fabricate and easy to understand. In the positive cycle the 2nd diode and the 4th diode is forward biased allowing the capacitor c4 and c1 to be charged. In the negative cycle the 1st and the 3rd diode are reversed biased and the capacitor c3 and c2 are being charged. The four capacitor voltages adds up before the resistor, giving us four times the voltage at the resistor. 6.4 Four 5.8 ghz with quadraupler in parallel configuration: In this design we have again used a quatrupler configuration bt this time we are using 4 sources in parallel with each other. The four parallel source were used to replicate the design, when 4 parallel antennas are used and then feeding into a single quadrupler rectifier configuration. The results are show below. 6.5 Four 5.8 ghz with four individual quadraupler rectifier in parallel configuration: The difference between the above design and this design is that, this time individual rectifier is being used with a single 5.8ghz source. The configuration is used in parallel combination. 6.6 Four 5.8 ghz with quadraupler in series configuration : In the design below a series combination was used. Four 5.8ghz source which is acting like a 5.8ghz patch antenna are configured in series conbination. The output from the source is then feed into the voltage quadrupler. The results are shown below. 6.7 HSMS 2862k Diode parameters Chapter 7 7 Conversion efficiency 7.1 Introduction to Conversion efficiency The design with different configuration was tested in ADS simulation. Now we have to move towards the physical antennas and we need to determine how we can mearsure the efficiency of a rectanna. When the antenna designs are manufactured we will tested the parrallel combination with the series combination. We will be comparing two designs. 14 array of antenna 22 array of antenna Chapter 8 8 Complete Rectenna design In this section we will see the complete rectanna design on a single surface. Which means that the low pass filter and the rectifying circuit will be on the same surface as that of the array antennas The dimension and the simulated results of all the component were shown in the above sections of the report. Chapter 9 9 CONCLUSION As we have seen that all the design of the antennas and the other component were tested at maximum in ADS and the results obtained from the ADS simulation shows that we are on the right track and we will be cable of manufacture a good efficient antenna is the next semester. The antenna will be able to convert the RF signal in DC power. The low pass filters were designed and we saw that the equal ripple filter show a much better results and so we will be using that with our design. The rectifying circuit were build and tested and a practical results show that we need a minimum of 3dbm power, so that the SMT led can be turned ON. In the future a 5.8 ghz antenna with array of 22 and 14 will be made. The simulation of 22 and 14 antenna array is already done in ADS. The designs are ready for manufacturing. 9.1 Prototype and gerber Files for Manufacturing 10 Appendix References J.O. McSpaden J.C. Mnakins, â€Å"solar power programs and MWP(micro wave wireless power),† IEEE Micro, volume. 3, number. 4, pages. 46-57, Dec 2002 J.A. Hagerty and Z.Popovic, â€Å"experimental results of a broad band arbitrarily polarized antenna,† found in IEEE MTT-S Int. Moscow Sym. Dig., May 2001, volume 3.,pages 1855-1858 D.G.Guha, Y.M.Antar and J.Y. Siddiqui and M. Biswas â€Å"Resonanting resistance for microstrip-line-fed for a circular-micro-strip patches† Ieee Proc Microw. Antennas Propagation† found in volume 152, Number 6, Dec 2005 W C. brown, â€Å"history of wireless power transmisson† IEEE Transaction on Microwave Theory and Techniques, 1983 Wireless-Power-Transmission(WPT) for the use of Solar Power Satellite found at site www.sspi.gatech.edu (Accessed 13th June 2008) R.P. Jedelika, â€Å"measured mutal coupling between antennas and the patch antennas†, IEEE Trans. on Antennas and Prop., pp. 147-149 Jan. 1981 Change, K. â€Å"Radio frequency and Microwave Wireless Systems† by John Wiley and Sons, Inc 2000 Taconic material â€Å"TLX-0 Data Sheet† TACONIC Advanced Dielectric Division David, M. P. â€Å"Microwave Engineering, second edition by † John Wiley and Sons, Inc 1998 Chang.K. â€Å"Radio Frequnecy and Micro-wave power wireless wystems, Chapter 3 to Chapter 4 Antenna Systems† by John Wiley and Sons, Inc 2000 Kai.chang,RF and microwave wiresless system chapter.3 pp 89-98. 2000 I. J. Bahle and P. Bhartia, â€Å"Microstrip patch Antennas†, Artech House Inc, Dedham, MA 1980 Balanise, C.A â€Å"Antenna Theory and Analysis for Design by † Wiley-Interscience, John Wiley and Sons, Inc., Hoboken, New Jersey 2005 I. J. Bahle and P. Bhartia, â€Å"Microstrip Antennas†, Artech House Inc, Dedham, MA 1980 Matsumoto. H Shinohara. N, â€Å"study on array of antennas for wireless power transmission† IEEE, volume. 46, number. 3, 1998 Bhartia, B. Roa and K.V.S. Tomar, R.S. â€Å"Millimeter-Wave Microstripe for Printed Circuit and Antennas† Arteche House, Inc, United States of America, 1991

Ways to Generate Awareness Among the People

Oil Conservation Fortnight (OCF) – 4th  Ã¢â‚¬â€œ 19th  January Petroleum or crude oil is a non renewable energy source that means it is present in the limited amount. If the use of oil will continue with the careless nature it is going to exhaust definitely at one day. Hence conservation of this valuable resource is the need of the hour. Therefore in order to generate awareness among the masses about the urgency of conserving petroleum products, the celebration of an Oil Conservation Week (OCW), with the participation of the Petroleum Conservation Research Association (PCRA) and the entire oil industry under the guidance of the Ministry of Petroleum & Natural Gas (MPNG), began in January, 1991. Considering the overwhelming response and enthusiasm generated by OCW in the country, and to further increase the reach as well as the effectiveness of the oil conservation campaign, the duration of the program was increased to a fortnight from the year 1997 onwards. During this fortnight, the entire oil industry undertakes various kinds of activities to emphasize the need and importance of the conservation of petroleum products and environment protection. This is carried out through print and electronic media, training programs, kisan or farmer melas, technical meets and distribution of literature in national as well as vernacular languages all over the country. The activities are carried out by the State Level Coordinators (SLCs) of the oil industry in each State under the direction of the Regional Level Coordinators (RLCs). Awards are given to Large, Medium & Small industries, State & Regional Level Coordinators, State Transport Undertakings, Energy Auditors, Upstream & Refining oil. Companies for outstanding performance in oil conservation activities. The State/ National level Essay Competition Awards for students & teachers are also given. Oil & Gas Conservation: Oil and gas conservation means their better and more efficient use with regard to economic, social or environmental costs and benefits, resulting in attainment of higher energy use efficiencies, minimization of wasteful practices and wastage and protection of the environment. Petroleum is the primary energy source in India and a preferred swing fuel. Its consumption has been increasing at a very steep rate from 3. 5 MMT in 1950-51 to 84. 3 MMT in 1997-98 and reached 130 MMT in 2001-02 and 175 MMT in 2006-07. The current estimate of natural gas reserves is about 100 million metric tons in the world. At current usage levels, this supply will last an estimated 100 years. In India, the power and fertilizer sector are major users of natural gas. In India, production of Natural gas increased from 17998 Million Cubic Metres in 1990-91 to 32274 Million Cubic Metres in 2007-08. Accordingly Strategy of Promoting Oil Conservation: Government has initiated various steps to promote conservation of petroleum products in the transport, industrial, agricultural and domestic sectors. These include adoption of measures and practices which are conducive to increase fuel efficiency and training programme in the transport sector; modernization of boilers, furnaces and other oil operated equipments with efficient ones and promotion of fuel efficient practices and equipment in the industrial sector; standardization of fuel efficient irrigator pump-sets and rectification of existing pump-sets to make them more energy efficient in the agricultural sector and development as well as promotion of the use of fuel efficient equipment and appliances like kerosene and LPG stoves in the household sector. These activities are promoted and coordinated by the Petroleum Conservation Research Association (PCRA) and Oil Marketing Companies under the guidance and supervision of Ministry of Petroleum & Natural Gas. The following specific activities are taken up from time to time. * Multi Media Mass Awareness Campaign Effective and result-oriented conservation methods adopted by the upstream undertakings in the oil sector like reduction of gas flaring by re-injection of gas to underground reservoir, installation of waste heat recovery systems, utilization of non-conventional energy sources and close monitoring of all conservation efforts by ONGC. * Energy audits, efficiency upgradation of equipment and appliances; substitution of diesel with Natural Gas, deployment of solar-powered illumination panel, battery operated vehicles, Bio-gas etc. * Compressed Natural Gas (CNG) is used as a fuel in transport sector in many countries. Its advantage is being safe and clean burning fuel, besides being environment friendly fuel. * Blending ethanol (5%) / methanol (3%) with Petrol for using in vehicles without any modification of engine. All these steps are certainly playing a major role in conserving Oil and Gas resources which are available to us in a limited amount. Let us be a part of this national activity by using natural resources wisely! What Organization Can Do? Whenever you save energy, you not only save money, you also reduce the demand for such fossil fuels as coal, oil, and natural gas. Less burning of fossil fuels also means lower emissions of carbon dioxide (CO2), sulphur dioxide (SO2), Oxides of Nitrogen (NOX), Carbon monoxide (CO), particulate matter, Lead (Pb) etc. Lower emissions of CO2  which is a green house gas contributes to reduce the impact of global warming. Similarly, lower emission of particulate matter and other pollutant help to reduce their harmful impact on the environment. For generating awareness: * A School Children's Rally for awareness * Organizing Film Festival, Seminars, exhibitions emphasizing value of natural resources ; need for their conservation. Organizing State/ National level Essay, Painting, Speech Competition about oil conservation especially emphasizing that children could be a beacon of light to guide the elders in the family and society on how to conserve oil. * Introducing â€Å"Publicity Van† which will go all over the city spreading the message of â€Å"oil conservation. † * Organizing â€Å"Street playsâ₠¬ - with the objective to project the routine oil conservation messages in a different way. * Use of Solar Street lights. * In the rural sector, use of gobar gas plants, would be excellent fuel conservation technique. This awareness campaign should not end at the end of the fortnight, but should continue in the hearts of all of us. What we Can Do in our day today life for Oil Conservation * While cooking use wide bottom vessels with covers. * Allow food articles taken out of the refrigerators to attain room temperature before cooking them. * Soak cereals and dals for sometime before cooking them to reduce the cooking time as well as the fuel consumption. * Use just sufficient water for cooking. * Pressure cookers used with separators lead to substantial fuel saving. * Try to eat together to avoid repeated warming of food. This not only saves fuel but also preserves the nutritional value of food. * Light the flame only after all preparations have been made and the vessel is ready to be put on the stove. * Use hot water from solar water heaters for cooking if the facility is available. * Try to use a solar cookers, solar lanterns. * The first rule of fuel conservation would be to travel judiciously and curtail wasteful driving. * Wherever possible/ available and convenient, use public transport instead of using personal transport. * Matching the size of the vehicle to your need would also go a long way in conserving fuel. For instance if you have the option of a personal car and a scooter, then use the scooter when only two persons have to travel, and the car if more persons have to travel or heavy luggage needs to be transported. * Emphasis should be given on reducing the use of petroleum products in our day to day life and act accordingly. This can be achieved by adopting car-pooling like practices. Car pooling will not only conserve fuel but will also improve social relations with your colleagues. * Use of solar lanterns in rural areas instead of kerosene based lamps. As far as possible, avoid idling the vehicle between red and green signal, be it a car, scooter or any other mechanized transport. * Try to buy fuel efficient vehicles. * There is no substitute for timely attention, servicing and tuning of the vehicle in fuel conservation and emission control. This should include checking of injectors and spark plugs, correct tire pressure, re-greasing, topping up or renewal of lubricants for engine a nd gear boxes. * Correct driving habits are important for fuel conservation. Try to avoid sudden Speeding, braking ; stopping, clutch riding, idling, over- speeding, and over-loading. All these small deeds will lead to fuel conservation and pollution control, which is our moral duty as citizens of India. It is the time we inculcate these measures to become a part of our daily routines. Only by practicing and preaching these conservation tips we can think of future progress. Given the difficult times ahead, it becomes our responsibility to spread this awareness, particularly amongst the youth who will be citizens of tomorrow. Good habits taught early will salvage the oil shortage to a great extent. This awareness campaign should not end at the end of the fortnight, but should continue in the hearts of all of us.

Philips Kotler Marketing Management Essay

Analyzing Consumer Markets Since marketing starts from the customer, it is of primary importance to understand the psyche of the customers and their buying motives. This chapter talks about the various behavioural patterns that govern the decision making process of a customer. A marketer needs to understand these factors affecting the customer’s purchase decisions so as to design an appropriate marketing strategy. Factors affecting Consumer Buying Behaviour 1. Cultural Factors a. Culture – Frames traditions, values, perceptions, preferences. E.g. Child learning from family & surroundings. b. Sub-culture – Provides more specific identification and socialization. Include nationalities, religions, racial groups and geographic regions. c. Social Class – Homogeneous and enduring divisions in a society which are hierarchically ordered. Members share similar tastes and behaviour. 2. Social Factors a. Reference Groups – Have direct or indirect influence on person’s attitude and behaviour. Primary groups: regular interaction, e.g. family, friends, neighbours. Secondary groups: religious, professional, trade union groups. Aspirational Groups: ones that a person hopes to join. Dissociative groups: whose values or behaviour and individual rejects. b. Family – Family of orientation: parents and siblings. Acquires orientation towards religion, politics and economics, sense of personal ambition, self worth and love. Family of procreation: spouse and children. More direct influence on buying behaviour. c. Roles and Status – Role consists of activities a person is expected to perform. Each role carries a status. Marketers must be aware of the status symbol of each product. Chapter 6 – Analyzing Consumer Markets 3. Personal Factors a. Age and Stage in the Life Cycle – Tastes are age related. Markets should also consider critical life events or transitions. b. Occupation and Economic Circumstances – Economic Circumstances like spendable income, savings, assets, debts, borrowing power etc affect consumption patterns. c. Personality and Self Concept – Personality, set of distinguishing characteristics that influence his/her buying behaviour. Consumers match brand personality with their ideal self concept instead of their actual self concept. d. Lifestyle and Values 4. Psychological Factors a. Motivation: Freud’s theory of id, ego and super ego; Maslow’s need hierarchy theory; Herzberg’s two factor model. b. Perception: Process by which we select, organize and interpret information inputs. In marketing, perceptions are more important than reality. c. Learning – Induces changes in behaviour arising from experience. Marketers can build demand by associating the product with positive drives. d. Memory – Short term and long term memory. Build brand knowledge and brand recall as node in memory. Problem Recogniton Information Search Evaluation of Alternatives Purchase Decision Postpurchase Behaviour The Buying Decision Process Problem Recognition – Customer recognises a need triggered by internal or external stimuli. Marketers need to identify circumstances that trigger needs. Information Search – Two levels of involvement – Heightened attention when person becomes more receptive to information about the product. At next level consumer may enter into active information search, looking for reading material, phoning friends etc. Evaluation of Alternatives – Factors influencing a particular choice over the other include attitudes, beliefs and expectancy value. Purchase Decision – Between purchase intention and purchase decision, 2 intervening factors come into play- Attitudes of others and Unanticipated situational factors. Marketers should understand that these factors provoke  risk and should provide information to reduce it. Post purchase Behaviour – Marketers must monitor postpurchase satisfaction, postpurchase actions, and postpurchase product uses. Chapter 6 – Analyzing Consumer Markets Trends Level of customer involvement Involvement Significant Insignificant Differences in Brands High Complex Buying Behaviour Low Variety Seeking Dissonance Reducing Habitual 1. Complex Buying Behaviour: When a customer purchases something for the first time. 2. Variety Seeking: Consumers will keep switching varieties just out of boredom. Eg- Biscuits. Marketer should keep introducing new products and display the product prominently. 3. Habitual: Buying the same thing out of habit and not out of loyalty. Distribution network should be excellent in this case. Maintain consistency in product and advertising. 4. Dissonance Reducing: In case of repeat purchase of same product.

Grading Students for Assessment