Recent content by polarmystery

Yeah I'll see if I can hack at it and try to come up with something. There are still 4 homework assignments left in the semester and I'm sure I'll post questions from them as well. Thanks again for all your help! I'm probably going to be up all night trying to figure out the rest of my...

To be honest, this class is supposed to be an "introductory" course in signal integrity in grad school but our professor goes well beyond that when he gives us assignments (And when I signed up for it, I basically had no idea what I was getting into). The last time I had a course in...

Okay, I still don't get why this is: "So if we were to substitute a complex εc = ε(1 + σ/jwε) you can see that we would be able to ignore σ from then on & pretend we have a non-conducting dielectric with complex permittivity εc." How does injecting εc = ε(1 + σ/jwε) into del x H = jwε(1 +...

Sorry about the line statement, I mistyped. Give me some time to absorb what you typed, this subject is excruciatingly difficult for me to grasp.

I guess I don't understand why we need to use Maxwell's equation to come up with a model for the line. Can you explain why that is necessary? (The chapter in our book doesn't seem to show anywhere in the complex permittivity section that this is necessary, but I wouldn't know either way).

Homework Statement The problem statement is shown on the picture [PLAIN]http://img252.imageshack.us/img252/1184/graphsq.jpg Homework Equations Debye's equation? The Attempt at a Solution Hey guys, I am trying to figure out how to obtain the equation for the graphs, but from...

Well, after completing the square and then subtracting out what I added to complete the square, I get this (It's a bit messy): \frac{RC(s+\frac{R}{L}-1)}{(s+\frac{R}{2L})^2-\frac{R^2C^2-4LC}{4L^2C^2}}

If I complete the square term on the bottom (s^2 + s + c) => (s + x)^2 + c, where does the additional x^2 term go that I added? Does it get added to the numerator also? It's been a while since I've done this stuff before.

Homework Statement Find the inverse laplace transform of the equation listed: (\frac{1-e^{-sa}}{a})*(\frac{1}{s^2}-\frac{RC}{s}+\frac{sRC+R^2\frac{C}{L}-1}{s^2+s\frac{R}{L}+\frac{1}{LC}}) Homework Equations a, R, C, and L are constants. The Attempt at a Solution Completely...

I think that's what the problem is. We have to show that measured delay in the line with the given parameters.

Homework Statement Greetings. I am having difficulty with a couple of parts to a homework problem. Mainly coming up with the transfer functions to plot V_o. See the picture for the problem statement: http://img827.imageshack.us/img827/5481/problempa.jpg Homework Equations l \leqq...

holy cow that was quick. Many thanks. I think that works out.

Homework Statement Any way to reduce this function for simplification? (Trying to find the reverse Laplace function) I found this function after doing a circuit analysis on a transmission line. \frac{s^2RC+sL}{s^2RC+sL+R} Homework Equations noneThe Attempt at a Solution I couldn't...

Something seems to be amiss here. I was thinking about it and I remember that typical coax cable resistance is somewhere like 50 ohms. I got this formula from our slides in class. It doesn't make sense that the answer is so high so I think there is something wrong, but honestly I don't know. Any...

Homework Statement Find the leakage conductance per meter of a cylindrical coax cable whose inner conductor (r1) is 0.125" (3.175*10^-3 m) and whose outer conductor (r2) = 0.5" (1.27*10^-2 m) if the space between them is filled with a material whose: \varepsilon_r = 2 and \sigma_c =...