# Electromagnetics/ Transmission Lines

Discussion in 'Homework Help' started by darryljames30, Feb 22, 2013.

1. ### darryljames30 Thread Starter New Member

May 2, 2012
3
0
I need major help with either or both of these.

1) A 60 ohm lossless line operating at 5MHz is terminated in a load that consists of a 60 ohm resistor in series with a variable inductor. Find the value of inductance that will produce standing wave ratio of 3 on the line, and calculate the corresponding complex reflection coefficient at the load.
2) A 100-MHz radio station uses a 75 ohm transmission line between the transmitter and an antenna with input impedance of 100 ohm. Design a (lamda/4) transformer to match the antenna to the line. If the quarter-wave section uses a two-wire line with spacing of 1 cm and polyethylene as a dielectric, determine the metric length of the section and the radius of the wire conductors.

2. ### darryljames30 Thread Starter New Member

May 2, 2012
3
0
Or does anyone have any hints to what I should go to solve these. Any help would be appreciated.