called a master earth station) • The satellite • A virtually unlimited number of VSAT earth stations in various locations - across a country or continent Content originates at the hub‚ which features a very large -15 to 36-foot (4‚5 -11m)- antenna. The hub controls the network through a network management system (NMS) server‚ which allows a network operator to monitor and control all components of the network. The NMS operator can view‚ modify and download individual configuration information
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INTRODUCTION This project implements the concept of wireless technology and LED scrolling display to construct an energy efficient and versatile electronic notice board for institutional purpose. The system uses dot matrix LED panels to construct a horizontal display module in which any kind of messages can be displayed and scrolled. The message to be displayed can be send wirelessly from a remote computer with the help of wireless RF transmitter and receiver. This system is also equipped with
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CHAPTER 1 INTRODUCTION 1. INTRODUCTION Airborne Internet is a concept that overlays computer network theory and principles into the transportation realm. The goal is to create information connectivity by providing a general purpose‚ multi-application data channel for people in transit. It is an approach to provide a general purpose high speed digital network to aviation. In doing so it has the potential to provide significant cost savings
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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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Wire Symbols Electrical Wire Conductor of electrical current Connected Wires Connected crossing Not Connected Wires Wires are not connected Switch Symbols and Relay Symbols SPST Toggle Switch Disconnects current when open SPDT Toggle Switch Selects between two connections Pushbutton Switch (N.O) Momentary switch - normally open Pushbutton Switch (N.C) Momentary switch - normally closed DIP Switch DIP switch is used for onboard configuration SPST Relay Relay open
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or person for the purpose of identification and tracking using radio waves. Some tags can be read from several meters away and beyond the line of sight of the reader. What is RFID? A basic RFID system consists of three components: a) An antenna or coil b) A transceiver (with decoder) c) A transponder (RF tag) Electronically programmed with unique information. There are many different types of RFID systems out in the market. They are categorized according to there frequency ranges. Some
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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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