symmetrical 3-port-circulator 7. Applications 7.1 Decoupling of generator and load 7.2 Decoupling of amplifier stages 7.3 Decoupling of a transmitter or receiver from its antenna 7.4 Transmitter and receiver on the same antenna 7.5 Combiner for 2 or more transmitters in the VHF and UHF 7.6 Combiner for radio links 7.7 Combining amplifier stages in a solid-state transmitter 7.8 Operation of one-port-amplifiers 7.9 Locking and priming of oscillators 7.10 Variable attenuator and phase shifter Bibliography
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wireless communication. Basically‚ antennas are used as transmitter and receiver in wireless communications like cellular telephones‚ satellite communications‚ radio broadcasting‚ etc. Despite many advantages of wireless communication there are many factors that affect the quality of wireless communication systems. In urban and indoor environments‚ there are many obstacles between the clear line-of-sight (LOS) between transmitter and receiver. Instead the signal is reflected along multiple paths
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a microphone (transmitter) to speak into and anearphone (receiver) which reproduces the voice of the distant person. In addition‚ most telephones contain a ringer which produces a sound to announce an incoming telephone call‚ and a dial used to enter a telephone number when initiating a call to another telephone. Until approximately the 1970s most telephones used a rotary dial‚ which was superseded by the modern Touch-Tone push-button dial‚ first introduced by AT&T in 1963.[1] The receiver and transmitter
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A SEMINOR REPORT ON WITRICITY Submitted to JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY‚ Anantapur In partial fulfillment of award of the degree of Bachelor of Technology IN ELECTRICAL AND ELECTRONICS ENGINEERING BY D.SANDEEP KUMAR 05P11A0255 [pic] DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING CHADALAWADA RAMANAMMA ENGINEERING COLLEGE (Affiliated to J.N.T.U‚ ANANTAPUR) TIRUPATI-517506 2009 ABSTRACT Human brains always search for the new ways and means which makes life
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Tribhuvan University Institute Of Engineering Kathmandu Engineering College Kalimati‚ Kathmandu Department of Electronics and Communication Engineering PROPOSAL FOR COMPUTER CONTROLLED MODEL CAR Submitted By: Abhishek Koirala(67003) Adarsh Bhattarai(67005) Amrit Khatiwada(67008) Bijay Dulal(67025) Submitted To: Department of Electronics and Communication Engineering Thursday Jan 10‚ 2013 ABSTRACT Autonomous and semiautonomous robots have made their impact felt in industry
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In case of theft‚ the exact location of the vehicle can be found by simply sending a message to the GSM modem in the vehicle. The GSM modem then replies us with the location of the vehicle using the data get from the GPS receiver. And also an IR transmitter and an IR receiver is placed in the vehicle door entrance. So‚ whenever an unauthorized person enters the vehicle a message is sent to the owner of the vehicle. In accident identification system a microcontroller is placed to identify the
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WIRELESS POWER TRANSMISSION Abstract: We are implementing new concept in our project. We are going to transmit the electrical energy without wire. It is not easy concept. Here power is transmit from one place to another place using electromagnetic induction or laser concept. Wireless energy transfer or Wireless power is the transmission of electrical energy from a power source to an electrical load without interconnecting wires. Wireless transmission is useful in cases where interconnecting
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Theory and Terminology Note Frequency Hop Spread Spectrum vs. Direct Sequence Spread Spectrum Direct Sequence Spread Spectrum (DSSS): The DSSS encoder spreads the data across a broad range of frequencies using a mathematical key. The receiver uses the same key to decode the data. 1 As a general rule‚ FHSS can resist interference from spurious RF signals ten times better than DSSS. 928 MHz The frequency range is divided into channels. The data is transmitted on these randomly
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wires. This system consists of an electric transmitter and a receiver. The working principle of receiver is just as radio receiver where the device needs to be in the range of transmitter. Witricity produces electricity with the use of resonant magnetic field and simultaneously stops any wastage of power. With this system in place we can achieve transmission up to a range of 100 watt. MIT researchers had power a bulb of 60 watt from an electric transmitter placed at a distance of 7 feet and achieved
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Robotics‚ Wireless Communication Software : Embedded C‚ Keil‚ Proload Microcontroller : AT89S52 Power Supply : +9V‚ 500mA Regulated Power Supply Display : Television Crystal : 11.0592MHz Communication Device : RF Module Transmitter : STT – 433MHz Receiver : STR – 433MHz Applications : Industries‚ Process Control‚ Domestic and Automotives Hand Gesture Recognition Technology Based Wireless Surveillance Bomb Diffusing Robot with Mobile Jamming Technique This is an interesting
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