Problems IX
- Tuned transmission lines are _____?
- The magnetic and electric fields occur _____?
- The three components of the magnetic fields are in phase _____?
- A transmission line with characteristics impedance of 450W is terminated ina a purely resisteive load. It is found by measurement that the minimum value of voltage upon it is 7.5mv, and the maximum is 9mv. What is the value of load resistance?
- A (75-j50) ohm load is to be matched to a 75-ohm line to give SWR = 1. What is the characteristic impedance of the quarter-wave transformer, connected directly to the load?To couple a coaxial line to a parallel-wire, it is best to use a _____?
- The velocity factor of a transformer line _____?
- For transmission line matching over a range of frequencies, it is best to use a _____?
- Skin effects refers to what?
- Why is open-wire line still found in many telephone system appalication?
- What is the relationship between possible bandwidth and signal frequency?
- What type of cable would you choose if you wanted an inexpensive, long-distance, medium-bandwidth transmission link where several circuits ran in parallel?
- You are told that certain satellite uses transmissions in the 4/6 GHz band. What does that mean?
- What is the capacitance of 55 miles No. 4 copper wire spaced 18 inches? From wire tables, we find that No. 4 copper has a radius of 0.10215 in.
- If measurements are taken along transmission line with an oscilloscope when there are no standing waves, the pattern would appear as _____?
| |