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MIT雷达系统介绍课件.pdf

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    Introduction to Radar Systems
    Disclaimer of Endorsement and Liability
    Introduction to Radar Systems Introduction
    Acknowledgement
    Background on the Course
    Outline
    What Means are Available for Lifting the Fog of War ?
    What Means are Available for Lifting the Fog of War ?
    Military Means of Sensing
    Early Days of Radar Chain Home Radar, Deployment Began 1936
    Chain Home Radar System
    Chain Home Transmit & Receive Antennas
    Radar and “The Battle of Britain”
    Slide Number 14
    Slide Number 15
    Slide Number 16
    Outline
    RADAR RAdio Detection And Ranging
    Electromagnetic Waves
    Properties of Waves Relationship Between Frequency and Wavelength
    Properties of Waves Phase and Amplitude
    Properties of Waves Constructive vs. Destructive Addition
    Polarization
    Radar Frequency Bands
    IEEE Standard Radar Bands (Typical Use)
    Radar Block Diagram
    Radar Range Equation
    Signal-to-Noise Ratio
    What the #@!*% is a dB?
    Pulsed Radar Terminology and Concepts
    Pulsed Radar Terminology and Concepts
    Brief Mathematical Digression Scientific Notation and Greek Prefixes
    Radar Waveforms
    Radar Waveforms (cont’d.)
    Radar Range Measurement
    Antenna Gain
    Propagation Effects on Radar Performance
    Radar Cross Section (RCS)
    Signal Processing Pulse Compression
    Bandwidth
    Why Bandwidth is Important
    Detection of Signals in Noise
    Coherent Integration
    Doppler Effect
    Doppler Shift Concept
    Why Doppler is Important
    Clutter Doppler Spectra
    Radar Block Diagram
    Outline
    Introduction to Radar Systems Tutorial Agenda
    References
    Introduction to Radar Systems Dr. Robert M. O’Donnell Introduction-1 AG 6/18/02 MIT Lincoln Laboratory
    Disclaimer of Endorsement and Liability • The video courseware and accompanying viewgraphs presented on this server were prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, nor the Massachusetts Institute of Technology and its Lincoln Laboratory, nor any of their contractors, subcontractors, or their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, products, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government, any agency thereof, or any of their contractors or subcontractors or the Massachusetts Institute of Technology and its Lincoln Laboratory. • The views and opinions expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof or any of their contractors or subcontractors Introduction-2 AG 6/18/02 MIT Lincoln Laboratory
    Introduction to Radar Systems Introduction Introduction-3 AG 6/18/02 MIT Lincoln Laboratory
    Acknowledgement • Developers of Tutorial Material – Dr. Eric D. Evans – Dr. Andrew D. Gerber – Dr. Robert M. O’Donnell – Dr. Robert G. Atkins – Dr. Pamela R. Evans – Dr. Robert J. Galejs – Dr. Jeffrey S. Herd – Dr. Claude F. Noiseux – Dr. Philip K. W. Phu – Dr. Nicholas B. Pulsone – Dr. Katherine A. Rink – Dr. James Ward – Dr. Stephen D. Weiner – And many others Introduction-4 AG 6/18/02 MIT Lincoln Laboratory
    Background on the Course • One of Many Radar Courses Presented at the Laboratory • Relatively Short – 10 lectures – 40 to 60 minutes each • Introductory in Scope – Basic Radar Concepts – Minimal Mathematical Formalism • Prerequisite – A College Degree – Preferred in Engineering or Science, but not Required • More Advanced Issues Dealt with in Other Laboratory Radar Courses Introduction-5 AG 6/18/02 MIT Lincoln Laboratory
    Outline • Why radar? • The basics • Course agenda Introduction-6 AG 6/18/02 MIT Lincoln Laboratory
    What Means are Available for Lifting the Fog of War ? D-Day + 1 The Invasion of Normandy D-Day Courtesy of National Archives. Introduction-7 AG 6/18/02 MIT Lincoln Laboratory
    What Means are Available for Lifting the Fog of War ? Courtesy of US Marine Corp, History Division. Iwo Jima 1945 Courtesy of National Archives. Courtesy of National Archives. Introduction-8 AG 6/18/02 MIT Lincoln Laboratory
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