is called a directional antenna. When these pulses hit an object like a ship‚ or aircraft they bounce off the object and back to the antenna. These signals are then converted into an electric signal and shown on screen where they can be viewed by an operator. The position of a detected target is determined by measuring the time it takes the signal pulse to travel to the target‚ bounce off‚ and return to the transmitting antenna. Combining this with the direction the antenna is pointing‚ gives the
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(2009) Predicted (2010) Antennas on Cell tower transmit in the frequency range of: • 869 - 890 MHz (CDMA) • 935 - 960 MHz (GSM900) • 1805 – 1880 MHz (GSM1800) • 2110 – 2170 MHz (3G)* Microwave radiation effects are classified as: •Thermal •Non-thermal The current exposure safety standards are mainly based on the thermal effects‚ which are inadequate. EXPERIMENT: Radiation level measurements near several Cell Tower sites A broadband monopole antenna of gain = 2 dB was used to measure
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Installation Guide Page 2 of 4 Mounting the Cello 6W The Cello 6W antenna is housed in the lid of the product. The radiation pattern is upwards and outwards as in picture #1 Pit mounting The Cello 6W unit is to be mounted with the antenna facing upwards and as close to the top of the pit as possible‚ this is to ensure the unit has the greatest signal strength. Kiosk mounting The Cello 6W unit is to be mounted with the antenna facing out of the Kiosk‚ to ensure the unit has the greatest signal strength
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benefits of military radar‚ system configuration of a typical military radar‚ operating the radar‚ system functions‚ various terminal equipments used along with their functions and some of the important parts of the radar such as transmitter‚ receiver‚ antenna‚ AFC (Automatic Frequency Control) etc. MILITARY RADARS INTRODUCTION Military radar should be an early warning‚ altering along with weapon control functions. It is specially designed to be highly mobile and should be such that it can be deployed
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gKit 32. TWO STAGE FM TRANSMITTER This Kit is a powerful two stage‚ 9V FM transmitter (Tx) with a range of up to 1 kilometer in the open. It uses an RF transistor in its output stage. Distance of transmission is critically dependent on the operating Conditions (in a building or out on the open)‚ type of aerial used (single wire or dipole)‚ operating voltage (12V is better than 6V) and if the circuit is peaked for maximum performance. The kit is constructed on a single-sided printed circuit board
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Abstract- Driverless cars are the promising approach to reduce the traffic problems. In driverless cars the frequently changing state of the road due to obstacles is controlled by array of sensors‚ which acknowledges the presence of obstacles on the driving path and creates the suitable path by frequently updating the route. This paper describes the efficient Doppler radar system and specialized algorithms to measure the speed of a vehicle used in autonomous vehicles. The velocity‚ acceleration and
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Upon researching the current Plain Old Telephone Service (POTS) that the company is currently using the following components‚ Local Loop‚ Central Office‚ Local Exchanges‚ POP‚ Long Distance System‚ and Fixed Line. A brief description of each components are as follows: a Local Loop is a simple network that connects a home to the Central Office of the Telephone Company. It consists of twisted pair cables with a maximum length of three miles. The Central Office is an office in a locality to which a
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the use of antenna arrays in interference cancellation and for receive diversity. This final chapter takes a broad view of the use of antenna arrays in wireless communications. In particular‚ we will investigate the capacity of systems using multiple transmit and/or multiple receive antennas. This provides a fundamental limit on the data throughput in multipleinput multiple-output (MIMO) systems. We will also develop the use of transmit diversity‚ i.e.‚ the use of multiple transmit antennas to achieve
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really top-of-the-world view of Toronto. But many people don’t consider the CN tower to be a building‚ since it does not contains occupied floors throughout its full height. People disagree on whether things like telecom towers‚ flagpoles‚ antennas‚ and spires should be included when measuring a building’s height. They say that buildings are used for offices and apartments‚ but structures are not–they do not have residential or office space. Are observation towers buildings or structures? What
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Coursework 3: Research on a new area or new technology of computing: IEEE 802.11AC THE FIFTH GENERATION OF WI-FI Table of Contents TOC \o "1-3" \h \z \u 1. INTRODUCTION PAGEREF _Toc400884340 \h 22. DRIVERS FOR 802.11AC PAGEREF _Toc400884341 \h 43. NEW FEATURES IN 802.11AC PAGEREF _Toc400884342 \h 54. CONCLUSION PAGEREF _Toc400884343 \h 105. REFERENCES PAGEREF _Toc400884344 \h 11 INTRODUCTION Usually Wi-Fi was a means for users to stay connected at home or in the enterprise to the internet
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