Wireless Antennas: Electromagnetic Wave Propagation and Antenna Types

Explore the fundamentals of wireless antennas in this 43-minute video lecture. Delve into electromagnetic wave propagation, EM wave spectrum, and power measurements in decibels. Learn to calculate overall gain, understand system losses including attenuation and mismatches, and examine reflection and absorption concepts. Investigate multipath problems and diversity solutions. Study isotropic radiation, beamwidth, and polarization. Discover various antenna types such as omnidirectional, patch, mast mount sectored, and Yagi antennas. Understand the Fresnel Zone and free space loss concepts, with a practical example across the Forth Rail Bridge. Gain essential knowledge for wireless communication systems and antenna design.

Intro
Electromagnetic wave propagation
EM wave spectrum
Power in dB's
dB's against ratio
Calculation of overall gain
dBm
System losses (attenuation and mismatches)
Reflection and absorption
Multipath Problems
Diversity
Isotropic radiation
Beamwidth
Isotropic gain
Polarization
Onmidirectional
Omnidirectional Horizontal Antenna
Patch antenna
Mast mount sectored (directional)
Wall/mast Yagi
Fresnel Zone
Free space loss (across the Forth Rail Bridge)