Question

7. a) Calculate the skin depth for a 2700 MHz signal conducted by a flat copper sheet which is 1/4 inch thick. Show the equation, all steps, and (metric, SI) units in your answer b) Fill in the blanks from the word list below. The Smith chart gives you a way to visualize impedance matching and transmission line loss. Once around the outside of the chart is wave length. The smaller the circle you draw on the chart is, the the VSWR and the better the impedance match. a full higher VSWR a half lower Time delay impedance 8. When a coax transmission line is connected to a mismatched load, a smaller VSWR (closer to unity) results inpower being delivered to the load. Fill in the blank from the word list below. MORE LESS THE SAME ZERO INFINITE 9. For a 30 foot length of coaxial line, the characteristic impedance is 73 ohms. The same 73 OHMS 4X73 OHMS 73/4 OHMS INFINITE ZERO cable 120 feet long would have a characteristic impedance of ohms. 10. Calculate the inductance per unit length for an ideal coaxial cable whose shield to center conductor diameter ratio is 4.2. The center conductor and shield are copper. You can assume that the relative permeability of the copper is the same as that of a vacuum. Show all equations, steps and units in your answer.

Answer 1