Please help me with this question, I\'d be much appreciated. Coaxial cable typic

Question

Please help me with this question, I'd be much appreciated.

Coaxial cable typically has characteristic impedance on the order of 50-75 Ohms. It's in fact not practical to manufacture coax cable with characteristic impedance of 500 Ohms. Why not? If you were constrained to manufacture coaxial cable with some fixed physical dimensions, a and b, but you wanted to reduce its characteristic impedance, what could you do? Keeping in mind the 'electron-on-a-spring' picture of bound charge in materials that was developed in class 2, why does your answer to part (b) make good intuitive sense?

Explanation / Answer

a. because you usually use a coax (e.g. cable tv wire or antenna wire end) to plug to a tv or video.. with characteristic impedance of ~50 to 75 ohms>>need impedance matching to minimize power loss>make it same impedance. b.you add an impedance matching network accordin to your need, and preffered (you can add electronic elements but better use shunt stubs >>search methods using smith charts..) c. as for the this i can't understand it fully (i was not in class 2) but i think now u have a clear idea. plz rate asap if need more help contact me directly

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