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

Video Lecture on Absorption of the Atmosphere

Short-wave transmitter PCJ Happy Station

The rotating antenna masts. Installed in 1937. The complex structure was unique in the world. It was capable of optimising radiation power to the desired target area. It consisted of two 60 metre high towers. In order to maintain minimum absorption the towers were built of wood. The platforms in the summit served as suspension for the antennas. In the direction of the beam, the radiation is a total of 24 times stronger than a simple dipole.

Source

Radio Wave Propagation in the Marine Boundary Layer

Radio Wave Propagation in the Marine Boundary Layer by Alexander Kukushkin

Based on his many years of professional experience at leading companies in communications technology, the author describes an analytical solution for wave propagation over the sea surface in an atmospheric boundary layer. His approach allows the detailed analysis of combined effects of diffraction, refraction and scattering in random media. While specific applications covered are targeted at radio wave propagation over the sea surface, a similar approach is applicable to many problems in underwater acoustics, seismology, solid matter physics and astrophysics. - Amazon