GTÜElectronics Notes

RF System Design for Communications · Digital lecture note

Lecture 9 – RF Link, Antenna Gain, Path Loss, Link Margin

Haberleşme için RF Sistem Tasarımı – RF Link, Antenna Gain, Path Loss, Link Margin

Course
RF System Design for Communications (ELM667)
Semester
Semester 7 · Fall 2024–25
Format
PDF · 6 pages · 0.1 MB · handwriting-style LaTeX
Language
Turkish
Original note
Ders9.pdf

Open the PDF (0.1 MB)LaTeX source (.tex)Original handwritten note

Lecture 9 – RF Link, Antenna Gain, Path Loss, Link Margin – first page of the digital lecture note
Notice: The digital notes were created from the handwritten notes with the help of Claude (Anthropic); they are meant as a supplementary resource and may contain errors. Always rely on the original notes and the official course materials.

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Antenna efficiency = P_TP_in < 1

eğer P_T gücünü yayıyorsa

Antenler her yöne eşit dağılım yapmaz. Bu nedenle her yöne eşit dağılım yaptığını varsaydığımız isotropic antenle mukayese ederiz

if antenna has Gain and efficiency

→ Güç yoğunluğu mesafenin karesiyle ters orantılı olarak değişiyor.

→ Alıcıyla vericinin birbirini gördüğü durum için

point-point (LOS)

what is the power at output of antenna connected to RF electronics

direct signal is dominant

n : number of paths

Bu linkte oluşabilecek bozulmalara 3 dBm bir pay bulunmaktadır. Eğer 5 dBm'lik bir bozulma olursa alıcı artık çalışmıyordur ( 3-5 = -2 dBm)

Link Budget Table

← Lecture 8 – Modulation Concepts, PAPR, ACPR, EVM, MERLecture 10 – Receiver architectures (heterodyne, image frequency) →

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