Lecture 9 from the Radar System Engineering course by Dr. Robert O'Donnell.

The document is a lecture on radar antennas and discusses various antenna scanning techniques. It begins with an overview of radar systems and the radar equation. It then covers antenna fundamentals and different types of mechanical, electronic and hybrid scanning antennas used in radar systems. The lecture outlines electronic scanning with phased arrays, including linear and planar array beamforming. It discusses controlling the array pattern through element excitation phases and amplitudes. Properties of linear arrays like beamwidth and sidelobes are also covered. The document provides examples of increasing array gain by adding more elements.

 

radar-2009-a-9-antennas-2

Lecture 8 from the Radar System Engineering course by Dr. Robert O'Donnell.

This lecture provides an overview of radar antennas and scanning techniques. It begins with introductions to basic antenna concepts such as near and far field regions, electromagnetic field equations, polarization, and antenna gain. It then discusses reflector antennas, which use mechanical scanning to direct the antenna beam. The document outlines additional topics that will be covered, including phased array antennas, frequency scanning, and hybrid scanning methods. The goal is to provide an introduction to different types of radar antennas and how they are used to direct electromagnetic energy.

 

 

radar-2009-a-8-antennas-1

Lecture 7 from the Radar System Engineering course by Dr. Robert O'Donnell.

The first part of this lecture provides an overview of radar cross section (RCS) and techniques for predicting a target's RCS through both measurement and theoretical calculation. It begins with definitions of RCS and factors affecting it. Examples of typical RCS values for different targets are given. Physical scattering mechanisms and contributors to a target's RCS are described. Both full-scale and scale model target measurement techniques are outlined. Theoretical prediction methods including geometrical optics, physical optics, and diffraction theories are introduced. Scaling laws for applying results from scale models to full-scale targets are also covered.

 

radar-2009-a-7-radar-cross-section-1

 

The second part of the lecture discusses various methods for calculating radar cross section (RCS), including the finite difference time domain method, method of moments, geometrical optics, physical optics, geometrical theory of diffraction, and physical theory of diffraction. It provides overviews and comparisons of each method, explaining their approaches and areas of applicability. The document also includes examples of RCS calculations and summaries of key points about specific methods.

 

 

radar-2009-a-7-radar-cross-section-2

Lecture 6 from the Radar System Engineering course by Dr. Robert O'Donnell.

 This document summarizes a lecture on radar signal detection. It discusses detecting signals in noise, the radar detection problem, basic target detection tests, and how detection performance is affected by factors like signal-to-noise ratio and number of integrated pulses. It outlines concepts like probability of detection, probability of false alarm, and the tradeoff between the two. Integration of multiple pulses can improve performance through coherent or non-coherent integration. Fluctuating targets are also addressed.

radar-2009-a-6-detection-of-signals-in-noise

Lecture 5 from the Radar System Engineering course by Dr. Robert O'Donnell.

This document contains lecture slides about radar signal propagation through the atmosphere. It discusses various propagation effects including reflection from the Earth's surface, atmospheric refraction, multipath interference, and attenuation. It provides equations for calculating propagation losses and phase differences between direct and reflected signals. Examples are given of how propagation affects radar coverage and detection range for a shipborne surveillance radar system. 

 

Lecture 5. Propagation effects

Lecture 4 from the Radar System Engineering course by Dr. Robert O'Donnell.

Lecture 4 Radar equationfrom Forward2025

Lecture 3 from the Radar System Engineering course by Dr. Robert O'Donnell.

Lecture 3 Review of signals systems and dspfrom Forward2025

Lecture 2 from the Radar System Engineering course by Dr. Robert O'Donnell.

Lecture 2from Forward2025

Lecture 1 from the Radar System Engineering course by Dr. Robert O'Donnell.

Lecture 1from Forward2025

A course in Radar System Engineering by Dr. Robert O'Donnell.

The course was initially developed in 2000 for engineers and scientists with little radar experience. It covers core topics in radar fundamentals and subsystems over multiple lectures. The course has evolved significantly and now includes additional material on radar applications. It is intended to provide students a broad understanding of radar principles and issues. 

 

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The course contents

• Lecture 1. Introduction
• Lecture 2. Review of Electromagnetism.
• Lecture 3. Review of Signals, Systems, and DSP
• Lecture 4.The Radar Equation
• Lecture 5.Propagation through the Atmosphere
• Lecture 6. Detection Signals in Noise
• Lecture 7.Radar Cross Section
• Lecture 8. Antennas I
• Lecture 9. Antennas II
• Lecture 10. Radar Clutter
• Lecture 11.Waveforms and Pulse Compression
• Lecture 12. Clutter Rejection I
• Lecture 13. Clutter Rejection II
• Lecture 14. Airborne Pulse Doppler Radar
• Lecture 15. Parameter Estimation and Tracking I
• Lecture 16. Parameter Estimation and Tracking II
• Lecture 17.
• Lecture 18.
• Lecture 19.