ii If the characteristic impedance of the transmission line is 20 \u03a9 and the AC

# Ii if the characteristic impedance of the

This preview shows page 3 - 6 out of 11 pages.

ii)If the characteristic impedance of the transmission line is 20 Ω and the AC signal has a frequency of 50 Hz, what is the input impedance seen at the Liverpool side? iii)If the characteristic impedance of the transmission line is 20 Ω and the AC signal has a frequency of 10 kHz, what is the input impedance seen at the Liverpool side? iv) Use the results obtained from Questions Q1b-i) to Q1b-iii) to explain why the characteristic impedance is generally a very important parameter at high frequencies, but not so important at low frequencies. 5 Total 35
The numbers in the right hand margin represent an approximate guide to the marks available for that question (or part of a question). Total marks available are 100. PAPER CODE ........ ELEC311 ............ PAGE ..4 ................... OF .... 11 ........................... CONTINUED
Q2.a)i)A lossless microstrip transmission line has a characteristic impedance of 50 Ω. If the length of transmission line is doubled, what will be the characteristic impedance of the microstrip line? Justify your answer. ii) A lossless transmission line has a characteristic impedance of Z 0 = 70 Ω and a phase constant of β =2 rad/m at 1 GHz. Calculate the values of the primary constants R , G , L and C of the line. 10 b) Find the scattering parameters of a parallel impedance Z a = 50 Ω connected in a two-port 50 Ω system, as shown in figure Q2b. Figure Q2b 10 c)

#### You've reached the end of your free preview.

Want to read all 11 pages?

• Fall '18
• JIAFENG
• Electromagnet, Transmission line, long transmission line, Elec 311

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern