RF System Design for Communications · Digital lecture note
Lecture 4 – Smith Chart, Power and Linearity
Haberleşme için RF Sistem Tasarımı – Smith Chart, Power ve Linearity
- 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-4.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):
- Smith Chart
- Softwares
- Measurement Devices
- Instantaneous Power (anlık güç)
- Power & Phasor
- Complex Power
- Maximum Power
- Kuvvetlendiriciler
- MOS transistörler
- Linearity
- Differential Pair
- Drawbacks of Nonlinearity
- (1) Harmonic Distortion
- (2) Gain compression
Text of the note
Show as plain text (Turkish; formulas and drawings are not included)
Finding transmission line length
Finding the value of L or C used for matching
Finding reflection coefficient of both load or source
Converting Z to admittance Y
Finding VSWR (Voltage Standing wave ratio)
(Keysight) ADS Advance Design System
(CadenceNI) AWR (1–2: çip düzeyinde tasarım)
CST (Dassault) Özellikle anten tasarımcıları için
Spectrum Analyzer: (Frequency Range) (10 Hz–13 GHz) frekans güçlerini …
Spectrum Analyser'a ilaveten demodulation yapılabilir
S param f -domain or Smith chart
Signal generater: yüksek frekanslı sinyal üretir
Microwave/RF power Meter
Instantaneous Power (anlık güç)
Bizim için ortalama güç önemli
akım, gerilime göre 90^° derece geridedir
P: average power or active Power P = Real [watt – W]
Q: reactive power Q = Imag [VAR] Voltage Amper Reactive
Find I and P_ave
maximize etmek için Z_s = Z_L^*
Drawbacks of Nonlinearity
a_1, a_3 have different signs
girişin genliği çok yükselirse kazanç düşer.
A _-1dB or P _1dB sistemin linear davranışından 1db düştüğü nokta