# Transmission Lines and Standing Wave Ratio post lab

## Description

Summary

EE Science II Laboratory #10

Transmission Lines and Standing Wave Ratio

Transmission lines refer to structures that guide electromagnetic energy from one point to another. Examples of
transmission lines include coaxial cables that connect television sets to antennas or internet modems to phone lines,
microstrips printed on circuit boards like the ones in your phone, optical fibers that carry high-bandwidth signals
over large distances, etc. Study of transmission line theory is essential for high-frequency circuit design where the
ratio of line length to the wavelength of operation is not negligible unlike wires and interconnects used in low-
frequency circuits. In such cases, electromagnetic signals undergo phase shifts resulting from significant time delays
when traveling through the transmission line and some portion of it may even be reflected at the load!

You will be introduced to the basics of transmission line theory in this laboratory. During the course of this
laboratory, you will:

1. Understand how waves propagate down a transmission line and how the physical properties of the
transmission line (dimensions and material) affects this propagation
2. Understand how the load impedance acts as a boundary condition that can result in wave reflection if the
load impedance does not match the characteristic impedance of the transmission line; you will calculate the
reflection coefficient for different load impedances
3. Learn that the magnitude of the total voltage at different points on the transmission line forms a standing
wave pattern due to the presence of two waves traveling in opposite directions
4. Measure and study the properties of the standing wave pattern for different load impedances using a coaxial
cable test bed

see last page on the exp (this what i want) and see the template (the format needed)