invisible) to radar‚ infrared‚[2] sonar and other detection methods. It corresponds to camouflage for these parts of the electromagnetic spectrum. Development in the United States occurred in 1958‚[3][4] where earlier attempts in preventing radar tracking of its U-2 spy planes during the Cold War by the Soviet Union had been unsuccessful.[5] Designers turned to develop a particular shape for planes that tended to reduce detection‚ by redirecting electromagnetic waves from radars.[6] Radar-absorbent
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determined by measurements of range and bearing on radar. 2. Relative Course means the direction of motion of a target relative to own ship’s position expressed as an angular displacement from north. It is deduced from a number of measurements of target range and bearing or own ship’s radar. 3. Relative Speed means the speed of a target relative to own ship’s position. It is deduced from a number of measurements of target range and bearing on own ship’s radar. 4. Relative Motion means the combination
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Study‚ design‚ and fabrication of power amplifier module to be used for low-attitude radar system operating at UHF band (820MHz-900MHz) Long Hoang Duc* Duong Bach Gia University of Engineering and Technology‚ Hanoi VNU 144th Xuan Thuy road‚ Cau Giay Dist Hanoi‚ Vietnam (*) Corresponding author Email: longhd@vnu.edu.vn University of Engineering and Technology‚ Hanoi VNU 144th Xuan Thuy‚ Cau Giay Dist Hanoi‚ Vietnam Email: duongbg@vnu.edu.vn Abstract—In this paper‚ we introduces
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has been developed using environmental detection sensors ‚ such as long and short range radars ‚ wide dynamic range cameras‚ ultrasonic sensors and laser scanners‚ Among these detection sensors ‚ radars can quickly provide drivers with reliable weather conditions ‚ in Adaptive Cruise Control System (ACCS)‚ these radars can detect object in-path and in the adjacent lane and is proposed for use in (ACCS) using radar components ‚ such as an antenna ‚ transceiver module ‚ transceiver control‚ target detection
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which automatically adjusts the vehicle speed and distance to that of a target vehicle. ACC uses a long range RADAR/LIDAR sensor to detect a target vehicle up to 200 meters in front and automatically adjusts the ACC vehicle speed and gap accordingly. ACC automatically decelerates or accelerates the vehicle according to the desired speed and distance settings established by the driver. The RADAR/LIDAR sensors are located under or behind the front bumper or behind the grille. 1. INTRODUCTION A typical
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This device is called the GPR‚ or Ground Penetrating Radar. NASA used this way of finding things in Turkey‚ it is said that "Working in that sweltering heat‚ they dragged a GPR device that looked like a lawnmower across the ground. The GPR sent pulses of microwave energy underground‚ where it bounced off buried objects. They used state of the art software to analyze the radar echoes and constructed a 3D map. The data located the position of artifacts and tombs. (Source
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range of techniques used with aircraft‚ ships and missiles‚ in order to make them less visible (ideally invisible) to radar‚ infrared and other detection methods. The concept of stealth is not new: being able to operate without giving the enemy knowledge has always been a goal of military technology and techniques. However‚ as the potency of detection and interception technologies (radar‚ IRST‚ surface-to-air missiles etc.) has increased‚ so too has the extent to which the design and operation of military
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Jammer Next Four industry teams vie to produce a more capable‚ next generation tactical jammer By Bill Carey With the award of technology maturation contracts to four industry teams in July‚ the U.S. Navy NextGen Jammer (NGJ) program within two years will advance from competing concepts to prototypes of the electronic warfare sensor of the future. The same four contractors and industry partners participated in technology maturation trade studies awarded by the Navy in January 2009. The NGJ is
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weapon called radar. What is radar? Radar stands for radio detecting and ranging‚ it is used to find radio waves and retrieve information and also to transmit radio wave information. Heinrich Rudolf Hertz a German scientist studying electromagnetic theory of light is responsible for the development of the radar system. Along with other less well known scientist under him. There are multiple different types of radar‚ AIR SEARCH RADAR‚ meaning plane missiles response. HEIGHT FINDING RADAR- when in
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active phased array radars are seen as the vehicle to address the current requirements for true ‘multifunction’ radars systems. Their ability to adapt to the enviournment and schedule their tasks in real time allows them to operate with performance levels well above those that can be achieved from the conventional radars. Their ability to make effective use of all the available RF power and to minimize RF losses also makes them a good candidate for future very long range radars. INTRODUCTION
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