steerable beam (radiation direction change) as in smart antennas. 2. They can provide a high gain (array gain) by using simple antenna elements. 3. They provide a diversity gain in multipath signal reception. 4. They enable array signal processing. Hon Tat Hui 1 Antenna Arrays NUS/ECE EE4101 An important characteristic of an array is the change of its radiation pattern in response to different excitations of its antenna elements. Unlike a single antenna whose radiation pattern is fixed
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Background Information: Spectrophotometry is a method that measures how much light is absorbed by using the electromagnetic spectrum. By seeing which colors are absorbed and which are reflected scientists can determine what a substance is without having to touch them. This is possible because each substance has a specific absorbance spectrum‚ meaning that the absorption spectrum of two different substances cannot be the same. Purpose/Hypothesis: 1. The purpose of the experiment was to determine
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purpose is to provide information on cell phone radiation‚ the risks that can be caused by cell phone radiation‚ and the potential health problems that could result from this. Details of the topic: I am going to talk about the arguments about how cell phone radiation can affect our lives and whether these arguments are accurate or not. Cell phone radiation is a type of electromagnetic radiation that has the ability to cause health issues. The radiation from this device can cause serious brain tumours
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Cited: 1. National Research Council. 1996. National Science Education Standards. Washington D.C.: National Academy Press. 2. John Vassallo (ed) 1995 Special issue on synchrotron infrared spectroscopy Synchrotron Radiation News 8. 3. R. L. Brunelle and Reed 1984 Forensic Examination of ink and Paper (Charles C. Thomas Pub Ltd‚ Springfield). 4. R. Saferstein (ed) 2001 Forensic Science Handbook (Volume 1) (Prentice Hall‚ New Jersey) 2nd edn. 5. R. Cross‚ “Fatal falls
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Test# 2 Name: Group: | |Question text |Criteria | |Q1 |[pic] | | | |Where I0 is the initial intensity of photons and [pic] is the linear……………..which describes the fraction of beam of ………rays or |
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The following is a project made by anonymous: INTRODUCTION The general purpose photoconductive cell is also known as LDR – light dependent resistor. It is a type of semiconductor and its conductivity changes with proportional change in the intensity of light. There are two common types of materials used to manufacture the photoconductive cells. They are Cadmium Sulphide (CdS) and Cadmium Selenide (CdSe). Extrinsic devices have impurities added‚ which have a ground state energy closer to the conduction
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subset of telecommunication involving the transmission of data to and from computers and components of computer systems. More specifically data communication is transmitted via mediums such as wires‚ coaxial cables‚ fiber optics‚ or radiated electromagnetic waves such as broadcast radio‚ infrared light‚ microwaves‚ and satellites. Data Communications = Movement of computer information by means of electrical or optical transmission systems Information can be represented using analog signals Analog
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Microwave Transmission Basics Microwave Transmission Basics Table of Contents • MW Advantages • MW Frequency bands • MW Link elements • Antenna Radiation Pattern • MW Alarms Microwave Transmission Basics Features Advantages Rapid Deployment – A microwave link can be installed in as little as one day No right-of-way issues – Radio spans all obstacles such as roads‚ railways‚ etc.‚ avoiding any requirement to seek permissions that inevitably are costly and introduce time delays
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comes from atoms that are in a excited state because of the high thermal energy of the flame. Each element is measured by absorption or emission of ultraviolet or visible radiation by the gaseous atoms. Samples are vaporized between 2000 and 8000 K and the vapors are measured by absorption of characteristic wavelengths of radiation. The samples should be diluted to ppm to analyze major constituents. Chemical equations that were used were the equation of the line y = mx + b which would be attained
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makes G3P. The energy in photosyntsis is located as solar energy in the beginning and winds up kinetic at the end from going from sunlight to electron carriers. At the end of the Calvin cycle energy becomes G3P to power the plant. Sunlight is electromagnetic energy At the end of light reactions the energy is in form of glucose while in the calvin cycle into G3P another form of
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