affect the motivation of the team? The level of danger involved‚ the level of success of the goals/objectives 12. What contingency plans did you make? Why were they necessary? To find the ‘field expedient’ antenna material and use the materials to set up an emergency satellite antenna up-link to direct the rescue helicopter into the makeshift landing zone. To walk to the border of the nearest friendly country. They were necessary in case the primary goal/s failed 13. How does this problem
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A Technical Comparison of 802.11n to 802.11g A Technical Comparison of 802.11n to 802.11g Abstract 802.11n was developed to address issues of distance and speed. These were issues with wireless g and especially big issues with legacy devices that were used previously. Wireless N devices allow for a wider range by using multiple-input multiple-out and multiplexing allowing more data to be sent at a given time than before in previous a/g devices. It also allows for better communication between
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can be integrated over the surface of a sphere enclosing the dipole to obtain the total power radiated by the antenna. Call this number P watts. An isotropic antenna radiating P watts would produce a flux density at the same radius of P = P/4πr2 (3) The gain of any antenna is the ratio of the maximum flux density‚ which occurs at θ = π/2‚ to the flux density of an isotropic antenna‚ with the power density measured
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use those technologies throughout their personal and professional lives. Contents Introduction 2 What is Wireless Technology 2 The wireless medium 2 Frequencies and Regulations 3 Wireless Transmission 4 Transmission Impairments 5 Antennas 6 Satellite Systems 6 Chronological Evolution of Wireless technology 7 Emerging Wireless Technologies 8 Introduction The impact or the role of technology in our professional as well as personal lives is inevitable. For those who research
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SPIKES2K6 ANDHRA UNIVERSITY‚VISHAKAPATNAM TITLE “BUS IDENTIFICATION SYSTEM FOR VISION IMPAIRED” AUTHORS V.APARNA VALLI B.V.H.H.SUDHEER B.UMA SANKARA RAO FINAL YEAR E.I.E.DEPT
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separation distance and the height of the transmitter antenna? The carrier frequency is 900 MHz. 3. In the 2-ray path loss model with ?derive an appropriate expression far the location of the signal nulls at the receiver. 4 .Compare the received power for the exact expressions for the 2-ray ground reflection model. Assume the height of the transmitter is 40 m and the height of the receiver is 3m. The frequency is 1800 MHz‚ and unity gain antennas are used. Plot the received. 5. Referring to Figure
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Bus Topology http://compnetworking.about.com/od/networkdesign/a/topologies.htm http://fallsconnect.com/topology.htm Bus topology Bus topology refers to a single cable that connects all the workstations‚ servers‚ printers and other devices on the network. The cable runs from device to device by using tee connectors that plug into the network adapter cards. Each end device has a terminator on one end of the tee and a cable going out to the next device on the other end‚ while all devices in the
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The power needed to activate the microchip is generated only when it is scanned. When the reading device is sending microwaves to the tag‚ the antenna is receiving them and by induction the waves are transformed into power for the chip that reads the info saved on itself and the antenna sends the data back to the reader. The biggest benefit is the lack of power source in passive transponders that allows for smaller sizes and lower prices‚ which leads to their much
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CHAPTER-15 Question 15.1: * Answer (b) Answer: 10 MHz For beyond-the-horizon communication‚ it is necessary for the signal waves to travel a large distance. 10 KHz signals cannot be radiated efficiently because of the antenna size. The high energy signal waves (1GHz − 1000 GHz) penetrate the ionosphere. 10 MHz frequencies get reflected easily from the ionosphere. Hence‚ signal waves of such frequencies are suitable for beyond-the-horizon communication. Question 15.2: * Answer
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equal displacement of the particles composing a wave of vibration. Space wave: The component of a ground wave that travels directly through space from a transmitting antenna to a receiving antenna; one part of the space wave goes directly from one antenna to the other; another part is reflected off the earth between the antennas. Plane Polarised: a type of polarization in which the electric vector of waves of light or other electromagnetic radiation is restricted to vibration in a single plane
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