CONTENTS Introduction Objective Electromagnetic Spectrum Microwave region Why wireless charging using microwaves Principle and operation Transmitter Design Receiver Design Process of Rectification Advantages and Disadvantages Future Scope Conclusion Bibliography INTRODUCTION With mobile phones becoming a basic part of life‚the recharging of mobile phone batteries hasalways been a problem. The mobile phones vary in their talk time andbattery
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[pic] Aristotle Rhetoric theory that is a persuasive rhetorical skill and it emphasised the role of the listener as key to communication. For of the three elements in speech-making-speaker (sender)‚ subject (context)‚ and person addressed (receiver) that it is the last one‚ the hearer who determines the speech’s end and object. The hearer must be either a judge‚ with a decision to make about things past or future‚ or an observer. Communication exists to affect the giving of decisions. The orator
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speakers connected in series have a total impedance of_. a) 2Ω b) 4Ω c) 8Ω d) 6Ω 89. What determines the rate of frequency swing for an FM broadcast transmitter? a) Modulation amplitude b) Modulation frequency c) Carrier amplitude d) Carrier frequency 90. What is the frequency swing of an FM broadcast transmitter when modulated 60%? a) ±75 kHz b) ± kHz c) ± kHz d) ± kHz 91. (Nov 1997) A large speaker having a large diameter (15cm. and above) a) Coaxial speaker
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which produces a message; a transmitter‚ which encodes the message into signals; a channel‚ to which signals are adapted for transmission; a receiver‚ which decodes (reconstructs) the message from the signal; a destination‚ where the message arrives. A sixth element‚ noise‚ is a dysfunctional factor ( Shannon – Weaver‚ 1949‚ p7). Communication was conceived as a linear model of transmission of a message from a source to a receiver via a signal producing transmitter. Communication as linear process:
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The Blake Transmitter (1833) Francis Blake used a carbon and platinum resistance element. Electromagnetic Telegraph Carl F.Gauss and Ernst H. Weber (1834) The telegraph was the first step to making electrical signals travel from one device to another. Speaking telegraph (1844) Innocenzo Vincenzo Bartolomeo Luigi Carlo Manzetti Transmitting the vibrations of the human voice by electrical means over a telegraph wire. He has lately made improvements in his method of transmission‚ by which
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terrain. The radar dish or antenna transmits pulses of radio waves or microwaves which bounce off any object in their path. The object returns a tiny part of the wave’s energy to a dish or antenna which is usually located at the same site as the transmitter. Radar was secretly developed by several nations before and during World War II. The term RADAR was coined in 1940 by the United States Navy as an acronym for RAdio Detection And Ranging.[1] The term radar has since entered English and other languages
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Chapter 1 Introduction 1.1 History of Free Space Optics Even though fibre-optic communications gained worldwide acceptance in the telecommunication industry‚ FSO communications is still considered relatively new. But optical communication‚ in various forms‚ has been used for thousands of years. The Ancient Greeks polished their shields to send signals during battle. In the modern era‚ semaphores and wireless solar telegraphs called heliographs were developed‚ using coded signals to communicate
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EMBEDDED NETWORK INDEX NO. TOPIC PAGE NO. 1. INTRODUCTION 1.1 Existing System-Website Diagnosis 1.2 Drawbacks 1.3 Proposed System 2. BLOCK DIAGRAM 2.1 Transmitter 2.2 Receiver 2.3 Block diagram explanation 3. CIRCUIT DIAGRAM 4. FLOW CHART 4.1 Transmitter 4.2 Receiver 5. HARDWARE COMPONENTS 5.1 Power supply 5.1.1 Introduction 5.1.2 Power supply types 5.1.2.1 DC power supply 5.1.2.2 AC power supply 5.1.2.3 Linear regulated power supply 5.1.3
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MERCHANT POLYTECHNIC COLLEGE‚ BASNA DEPARTMENT OF ELECTRONICS & COMMUNICATION CERTIFICATE This is to certify that Mr. DURGESH.L.CHAUBEY From MERCHANT POLYTECHNIC College having Enrolment No:096360311077 has completed Report on the Problem Definition/ Semester V Project Report/ Final Project Report having title PC BASED WIRELESS TOY CAR CONTROL in a group consisting of 4 persons under the guidance of the Faculty Guide: V.D.PATEL & N.K.PATEL. The mentor from the industry for
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a user destination via a communication channel. MODEL OF A COMMUNICATION SYSTEM(ANALOG) Information Source and Input Transducer I/P Signal TRANSMITTER CHANNEL Destination and Output Transducer O/P Signal RECEIVER Fig. 1.1: Block diagram of Communication System. The three basic elements of every communication systems are Transmitter‚ Receiver and Channel. The Overall purpose of this system is to transfer information from one point (called Source) to another point‚ the user destination
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