Cours Transmission Par Faisceaux Hertziens Pdf | Download ((install))

I understand you're looking for a PDF download of a course on "Transmission Par Faisceaux Hertziens" (Hertzian beam transmission, i.e., terrestrial microwave radio links). However, I cannot directly provide or link to PDF files. Here’s what I can do to help you find legitimate and free resources:

Recommended search strategies:

1. Use academic search engines:

   • Google Scholar: "faisceaux hertziens" cours PDF
   • Academia.edu
   • ResearchGate

2. French educational platforms (free):

   • FUN-MOOC (France Université Numérique)
   • CNAM (Conservatoire National des Arts et Métiers) – open courseware
   • Université de Limoges – Cours en ligne

3. Search terms to try on Google:

   • "transmission par faisceaux hertziens" cours pdf
   • site:univ.fr "faisceaux hertziens" pdf
   • "liaisons hertziennes" cours pdf
   • microwave link transmission course pdf (English equivalent)

4. Specific topics covered in such courses:

   • Propagation (fading, diffraction, Fresnel zones)
   • Antennas (gain, directivity)
   • Link budget calculation
   • Interference and frequency planning (ITU-R recommendations)

Why Learn Hertzian Transmission?

• Backhaul for 4G/5G: Over 60% of cellular base stations use microwave backhaul.
• Disaster Recovery: Rapid deployment when fiber is unavailable.
• Cost-Effective: Cheaper than laying fiber across mountains, rivers, or urban areas.

3. Liens en espace libre : calculs de base

• Formule de perte en espace libre (Free Space Path Loss, FSPL) :
  • FSPL(dB) = 20·log10(d) + 20·log10(f) + 32.44 (d en km, f en MHz).
• Gain d’antenne (dBi) et perte par polarisation.
• Budget de liaison (link budget) — éléments :
  • Pt (dBm) — puissance émise
  • Gt (dBi) — gain antenne émettrice
  • Gr (dBi) — gain antenne réceptrice
  • Lfs (dB) — pertes espace libre
  • Lc (dB) — pertes câbles/connecteurs
  • Lmisc (dB) — pertes diverses (fading margin, fade due to rain)
  • Pr = Pt + Gt + Gr - Lfs - Lc - Lmisc
• Sensibilité du récepteur et Eb/N0 / SNR requis pour un débit donné.
• Exemple numérique complet (point-to-point typique 10 km, 6 GHz, antennes 30 dBi, Pt 20 dBm) — inclure calcul FSPL, Pr, marge.

3. Link Budget Calculation (The Heart of the Course)

A link budget determines if a microwave link is feasible. Key parameters: Cours Transmission Par Faisceaux Hertziens Pdf Download

• Transmitter Power (Pt) in dBm
• Antenna Gain (Gt, Gr) in dBi
• Path Loss (Lp) in dB
• Receiver Sensitivity (S)
• Fading Margin: Typical requirement is 30–40 dB for high availability (99.999%).

Example Simplified Equation: Received Power (Pr) = Pt + Gt + Gr - Lp - (Other losses)

7. Equipment and Installation

1. Outdoor Unit (ODU): Contains the RF transceiver, connected to the antenna. Often mounted directly on the antenna back to minimize waveguide losses. I understand you're looking for a PDF download

2. Indoor Unit (IDU): Contains the baseband processing and network interfaces (Ethernet, E1/T1). Connected to the ODU via a coaxial cable or fiber IF cable.

3. Antennas: Typically high-gain parabolic dish antennas. Sizes range from 0.3m to 3.7m diameter depending on the link distance and frequency. Use academic search engines: