Antennas only launch the energy; the environment determines how it travels. K.D. Prasad classifies wave propagation based on frequency and the portion of the Earth used for transmission. Slide 14: Ground Wave (Surface Wave) Propagation
The second half of the textbook focuses on how waves travel through the Earth's atmosphere:
A critical slide for any PPT on this topic is the Principle of Pattern Multiplication. It simplifies the analysis of arrays composed of identical elements: antenna and wave propagation by kd prasad ppt full
Formed by flaring a waveguide. Used as feed horns for satellite dishes due to high gain and low losses. Microwave / UHF
Understanding Antenna and Wave Propagation: A Guide to K.D. Prasad’s Fundamentals Antennas only launch the energy; the environment determines
: Low Frequencies (LF) and Medium Frequencies (MF), typically under (e.g., AM radio broadcasting). Slide 15: Space Wave Propagation
Radiation occurs when electrons are accelerated or decelerated along a conducting wire. If a wire is curved, bent, discontinued, or terminated, charges accelerate and emit electromagnetic energy. Alternating Current Element (Infinitesimal Dipole) Slide 14: Ground Wave (Surface Wave) Propagation The
This section transitions from theoretical wire structures to practical antennas utilized in commercial broadcasting, radar, and satellite systems. Antenna Type Frequency Range Key Feature / Application
The introductory section of the presentation establishes how time-varying electrical currents transform into freely propagating electromagnetic waves. Alternating Current to EM Waves