RF4 A2

• 1.
• TLs propagate frequencies down to DC, while waveguides have a low cut-off f, thus high-pass characteristic.
• 2.
• TL - TEM waves. only components at right angle to propagation
• waveguides - TE or TM (transverse), always a field component in direction of propagation

• use f=c/lambda to calculate wavelength, then insert:

At high frequencies it is increasingly difficult to measure voltage and current accurately. It is much easier to measure the incident and reflected waves from a network under test and therefore define the electrical propoerties without prior knowledge of the form of network.