Recent content by HPRF

Hi I was wondering if anyone could tell me the permittivity of Al2O3 >95% polished, or how to calculate it? Any useful electrical properties websites or books would be much appreciated. Also I was wondering if the the permittivity was frequency dependent? Thanks in advance

Thanks for the advice guys, I got it to rotate...

Hi, I don't think the previous message was clear enough. What I am looking for is theory that describes the interaction between the the two individual coax's in twinax.

Hi, I am investigating a device that I think shows similar properties to twinax, but I am unable to find any theory on it. Does anyone know of any websites or books that explain the theory behind twinax; equivalent circuits of twinax would be especially helpful... Thanks in advance, Daniel

Hi, I think you're getting the right idea of what I'm trying to do Bandit, but I'm rotating it on a plane not from a plane. All parts are drawn onto the one plan for the assembled component and I am trying to rotate it by 45 Degrees with respect to the other component. It's a device...

Hi, I am having a little bit of difficulty rotating an assembled component in SolidWorks. I have followed the help file to the letter and for some reason the component is not rotating as expected. I have rotated it using the Triad method described and also by selecting the component and moving...

They are not the direct inverse of S parameter and you can not combine S parameters by matrix multiplication to describe a more complex system. You can with T parameters, which is why I am looking for them. Thanks for the reply.

Can anyone tell me where I can find a basic T parameter table for RF design. One with the T parameters for shunt impedence in coaxial, series capacitance in coaxial, coaxial of length l etc...

I'm assuming the cavity is closed at both ends as such the fundamental mode would be along the length (i.e. the 001 mode). As such using the equation derived from the dispersion relation f=c((\frac{q}{2L})2)1/2 would give the fundamental frequency. With L= 30mm, q = Mode Number (1)...

Homework Statement For a given rectangular waveguide the cut off frequency of the fundamental mode is 6.5GHz. What is the fundamental resonant frequency of a 30mm long cavity made from the same waveguide? Homework Equations Unsure The Attempt at a Solution I would have...

Homework Statement A cavity can only store 1J of EM energy as it reaches dielectric breakdown at 3kV/mm. What dielectric strength would a new gas filling the cavity have if the energy stored was to be 4J. Homework Equations U=\frac{1}{2}(epsilon)E2The Attempt at a Solution I would use the...

The current is flowing parallel to the z-axis.

What I mean is that the field that is circling the wires is directed along the positive direction of the x-axis and the equation dB=\frac{\mu_0 }{2 \pi r}dI=\frac{\mu_0}{2 \pi r w}dx with the current flowing along the z axis, the direction of the ribbons/plates...

Actually both ribbons extend to infinity in the xz plane, so the infinite wire equation is applicable. Yes they are at a distance of L/2 from the origin running parallel to the xz plane. As the current is in opposite directions in each ribbon the B fields add (I think...).

The problem is to find the B-field along the x-axis. Which is parallel to the infinitely long parallel plates of width W, these are in the x-z plane, bit continues out of the parallel plates after a distance W/2. So it appears that either the initial equation needs to be modified or a new one...