ECE 6130 Summary for Midterm I : Transmission Lines

 

Review of Skills that may be required on any exam throughout the semester:

Transmission Line parameters

         Physical effect of each parameter

         Derivation from Table 2.1

         Derivation from E and H fields

Transmission Line Fields

         One-way voltages, currents, impedance: Vo+, Vo-, Zo, Io+, Io-

         Total voltage, current, impedance:�� V(z), VL, Vg, Vin , I(z), etc., Z(z), ZL, Zin

Transmission Line Equations

         Telegrapher�s Equations

         Wave Equations (for V or I)

         Numerical Solution of TL equations.

Smith Chart

         Impedance and Admittance

         SWR, Location of Voltage minima and maxima

         Reflection Coefficient

         Distance = rotation (Toward load or toward generator)

         Attenuation from lossy lines

Transients on Transmission Lines

         Reflection diagram

         Step function, pulse, or CW voltage input

         Currents or voltages as a function of space (given time) or function of time (given location)

Standing Waves

         How standing waves are produced from Vo+ and Vo-

         WHAT are standing waves?Understand V as a function of time (given location) or function of space (given a time)

         Standing wave measurements using slotted line (different loads and frequencies), voltage minima and maxima, SWR.

New material:

Microstriplines

         Design for a given impedance

         Field patterns

         Lossy lines

S-parameters��������

         Derivation of Z, Y, ABCD, S matrices for given networks

-          Direct methods

-          Tables and Conversions

-          Measurements

         Physical meanings of parameters

Matching Networks

         Single Stub Matching

         Double Stub Matching

         Quarter Wave Transformers (real and complex loads)

         Binomial and Chebyshev Transformers

         Lumped Element Networks (L, Pi, T) ������� (real and complex loads)

 

Just a note:

When given a transmission line question, you may solve it either with calculation of equations or with Smith Chart.�� Smith Charts (like those in class) will be provided.You may bring any other type of Smith Chart you like (colored, more detailed, preprinted, etc.).Exam is open portfolio, open notes.