YAGI-UDA ANTENNA Dr. Shintaro Uda and Dr. Hidetsugu Yagi of the Tohoku Imperial University invented a directional antenna system consisting of an array of coupled parallel dipoles. Yagi-uda or simply yagi antennas or yagi’s are the most high gain antennas. It consists of a driven element‚ a reflector and one or more directors. i.e.‚ yagi uda antenna is an array of a driven element and one or more parasitic elements. The driven element is a resonant half wave dipole usually of metallic rod. The
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SUBJECT: ANTENNAS AND WAVE PROPAGATION 1. Define an antenna. Antenna is a transition device or a transducer between a guided wave and a free space wave or vice versa. Antenna is also said to be an impedance transforming device. 2. What is meant by radiation pattern? Radiation pattern is the relative distribution of radiated power as a function of distance in space .It is a graph which shows the variation in actual field strength of the EM wave at all points which are at equal distance from the
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Smart Antenna Systems for Mobile Communications FINAL REPORT Ivica Stevanovi´‚ Anja Skrivervik and Juan R. Mosig c January 2003 Laboratoire d’Electromagn´tisme et d’Acoustique e Ecole Polytechnique F´d´rale de Lausanne e e CH-1015 Lausanne Suisse http://lemawww.epfl.ch/ ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE Contents 1 Introduction 1.1 Evolution from Omnidirectional to Smart Antennas 1.1.1 1.1.2 1.1.3 1.2 . . . . . . . . . . . . . . . . . . . 1 4 4 5 5 8 8 10 14 17 17 19 20 21
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things can be done as well as others”‚ the famous line of Sam Patch became a well-known saying amongst U.S. citizens especially Jeffersonian and Jacksonian democrats (Johnson‚ 163). Sam Patch was many things in his lifetime from a famous falls jumper to a destitute mill worker to also the first American-born boss spinner. He however was viewed different amongst social groups in America. The common folk and Jeffersonian democrats viewed Patch as a good man and somewhat of a folk hero‚ while the middle
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Array Representation A complete binary tree has a simple array representation. Suppose we number the nodes from left to right‚ beginning at the top and ending at the bottom. Then we can store the various data items in the corresponding elements of an array. For example can be represented by the array This in fact corresponds to the level order enumeration of the tree. Note that we only use an initial segment of the array. Provided the array is long enough‚ and we know the number of
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Parallel arrays and arrays of structures An array of structures are usually equivalent to parallel arrays of the components. For example‚ if each student record consists of an ID number and a GPA value‚ then a list of students can be represented as an array of structure: The same data can be stored as two arrays that "parallel" to each other‚ in the sense that the same index in them indicate data for the same student: Usually the first way is more natural and convenient. Advantages and
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a person‚ I guarantee‚ you’ll win no matter what the outcome is.” – Patch To some people‚ life is hard‚ cruel and merciless. These people see life as punishment throughout their entire lives. They therefore resigned themselves to fate‚ believing all is finished. They lost every sense of direction and most times‚ some of them go as far as committing suicide‚ just to escape the injustice life has meted out to them. Hunter “Patch” Adams isn’t one to escape this dilemma. Having been institutionalized
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DERIVED DATA TYPES: REFERENCES‚ ARRAYS AND POINTERS Krishna M. Singh Department of Mechanical and Industrial Engineering Indian Institute of Technology Roorkee Roorkee 247667 Reference: Deitel and Deitel. C++ : How to Program. Prentice Hall‚ 2008 Krishna M. Singh‚ Department of Mechanical & Industrial Engineerig‚ IIT-Roorkee 1 Fundamental Data Types Basic Types: Boolean‚ character‚ integer and floating point types. Additional Types: void : To signify absence of information
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1. An array is a list of data items that _____. are of different data types are all integers have different names are indexed | 2. An array that stores five days of closing stock prices can be declared as _____. decimal price1‚ price2‚ price3‚ price4‚ price5; decimal [] price = new decimal[5]; decimal price[] = new decimal[5]; decimal [] price = new price[5]; | 3. Which statement is true about this array declaration? int [] myArray = {1‚4‚3‚5‚6}; It declares a 5 dimensional array
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Student Name Class Comp 230 Date VBScript IP Array Report In the space provided below‚ copy and paste your IP_Array.vbs Program Code. If it doesn’t fit‚ use the next page for the continuation of your sourcecode program ’ VBScript: IP_Array.vbs ’ Written by: Student Name ’ Date: Today’s Date ’ Class: COMP230 ’ Professor: Professor Name ’ =================================== ’ Below is an initialize a 2-dimension ’ array of IP Address. The first index ’ +100 is the room# and the
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