A good PDF will include practice problems. Here are typical questions:
Once you master the basics, look for PDFs covering: Cours Transmission Par Faisceaux Hertziens Pdf Download
Prepared for: Academic / Self-Study
Subject: Telecommunications Engineering
Last Updated: April 2026 A good PDF will include practice problems
Q: A 10 km link at 7.5 GHz has an obstacle 4 km from the transmitter. Calculate the 1st Fresnel zone radius at that point and determine if 60% clearance is achieved if the obstacle is 20 m below the line of sight. A: Formula: ( R = 17
A: Formula: ( R = 17.32 \times \sqrt\fracd1 \times d2f \times D ) (km, GHz)
Here: d1=4 km, d2=6 km, f=7.5 GHz, D=10 km.
( R = 17.32 \times \sqrt\frac4\times 67.5 \times 10 = 17.32 \times \sqrt\frac2475 = 17.32 \times 0.565 = 9.78 m )
60% of R = 5.87 m. Since obstacle is 20 m below LOS, clearance is sufficient.