This repository contains the design, analytical calculation, and simulation of various RF impedance matching networks. The goal of this project is to match a complex load impedance to a standard
The simulations were primarily conducted using AWR Microwave Office, with analytical verifications performed using MATLAB and the Smith Chart.
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Operating Frequency (
$f_0$ ): 2 GHz -
Characteristic Impedance (
$Z_0$ ):$50\ \Omega$ -
Load Impedance (
$Z_L$ ):$200 - j40\ \Omega$
- Calculated using both Smith Chart and analytical MATLAB equations.
- Designed two possible solutions (configurations using Capacitors and Inductors).
- Simulated ideal lumped components to evaluate S11 parameters and bandwidth.
- Designed using parallel stubs to match the load.
- Calculated transmission line lengths (
$d$ ) and stub lengths ($l$ ) using the Smith Chart. -
Physical Implementation: Converted the ideal electrical lengths into physical Microstrip Lines (MLIN) dimensions using the TXLine tool (using a substrate with
$\epsilon_r = 3.4$ ,$H = 0.8\text{ mm}$ ,$T = 35\ \mu\text{m}$ ). - Accounted for physical discontinuities (using MTEE components) and performed tuning to recenter the resonant frequency to exactly 2 GHz.
- Alternative distributed matching technique utilizing short-circuited stubs.
- Compared bandwidths (
$\Delta f$ ) between different solutions to determine the optimal configuration.
- AWR Microwave Office: For schematic capture, S-parameter simulation (S11), and tuning.
- MATLAB: For executing analytical formulas to verify Smith Chart readings.
- TXLine: For calculating physical microstrip dimensions.
- Smith Chart: For graphical impedance mapping and stub length calculations.
/AWR_Files/: Contains the AWR Microwave Office project files (.emp)./MATLAB/: Contains the MATLAB scripts used for calculating lumped element values (L & C)./Docs/: Contains the full project report (PDF) detailing the step-by-step Smith Chart procedures and simulation graphs.
Ghader Ali Telecommunications Engineer | Software Developer
This project was completed as part of the 4th-year Communications Engineering curriculum at the Higher Institute for Applied Sciences and Technology (HIAST).