You're looking for a downloadable PDF of "Antennas and Wave Propagation" by K.D. Prasad. Here's some information about the book and a few options to access it:
This book provides a comprehensive introduction to the fundamental principles of antenna theory and wave propagation. It covers topics such as antenna types, radiation patterns, gain, directivity, and efficiency, as well as wave propagation mechanisms, including free space propagation, ground wave propagation, and tropospheric propagation. You're looking for a downloadable PDF of "Antennas
