Transmission Lines for the TerrifiedJeff 9V1ASFilename:BB249_70

Hopefully, by the end of this talk, you will be able to answer the questions:1. "What is reflection coefficient?" 2. "What is VSWR" 3. "What is matching?" 4. "What are standing waves?" 5. "How much of my transmitted power is going out when my VSWR is 2?" 6. What happens if the XYL keys up the 300W Linear while I am adjusting the spacers on the open wire feeder?7. Why 50 ohms?8. Explain velocity factorJeff 9V1AS

Jeff 9V1ASWhat is characteristic impedance?

Jeff 9V1ASYes, I can see your formulae, but I still cant grasp the concept of characteristic impedance!OK, lets try again

Jeff 9V1ASCharacteristic Impedance Formulae for common transmission line types

Jeff 9V1ASWhy 50 ohms?

Jeff 9V1ASWhy 50 ohms?

Jeff 9V1ASWhy 50 ohms?

Jeff 9V1ASTransmission and reflection

Jeff 9V1ASStanding waves along a mismatched line (1)

Jeff 9V1ASStanding waves along a mismatched line (2)

Jeff 9V1ASWhat happens to the voltage and current for various terminations.

Jeff 9V1ASV and I distribution for the special cases of and lambda

Jeff 9V1ASLumped equivalents for TLs just less, equal, greater than lambda

Jeff 9V1ASDifferent lengths can behave like different lumped circuits!

Whats the catch?.....

Jeff 9V1ASSome special properties of and lambda lines

Jeff 9V1AS

Jeff 9V1AS

"This is the last time you're coming home late from your ham radio club meeting"!Jeff 9V1AS