RF System Design for Communications · Digital lecture note
Lecture 10 – Receiver architectures (heterodyne, image frequency)
Haberleşme için RF Sistem Tasarımı – Receiver architectures (heterodyne, image frequency)
- Course
- RF System Design for Communications (ELM667)
- Semester
- Semester 7 · Fall 2024–25
- Format
- PDF · 12 pages · 0.5 MB · handwriting-style LaTeX
- Language
- Turkish
- Original note
- Ders-10.pdf
Open the PDF (0.5 MB)LaTeX source (.tex)Original handwritten note
What is in this note?
Section headings of the note (in Turkish):
- Design Architecture of Receivers
- GSM 900 band
- Down Conversion
- Heterodyne Receivers
- Image Frequency: Hayal Frekans
- 2 scenarios
- Dual Conversion Receiver
Text of the note
Show as plain text (Turkish; formulas and drawings are not included)
_T=0,5 → microstrip antenna efficiency
G_T=11 dB → antenna gain
P_in=40 W (input power before antenna)
Design Architecture of Receivers
Band → frequency allocated for specific application
Off-chip filter → eğer filtrenin keskin olmasını istersek
Narrowband sharp roll-off filter is not possible
Uplink band & channels.
Downlink band & channels
1- Tunable IF Filter, constant LO
2 → Constant IF Filter, Tunable LO
High side injection
Low side injection
High-side Injection
Image Frequency: Hayal Frekans
1) ω_LO far from ω_RF and high ω_IF
2) ω_LO close to ω_RF and low ω_IF
Dual Conversion Receiver