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Thanks all for the feedback so far. This question has been moved to the Microwave engineering Forum, since it may need more specialist knowledge of material in microwave environments.

This is a duplicate of a question asked on the Other Topics forum: What is the best insulating material to use at these frequencies? I'm thinking about a material to bind copper wire strands together. Ideally the material should have good mechanical properties, as well as no UHF heating (or...

Yes that was my thought too, Logbook! Interesting about the glass, I'll look into that further.

Thanks PeeBee. I've come across these in my literature search. The motor one in particular is quite interesting. These are the main propeller motors for the ship. There seems to be a break point when superconductors are more applicable than copper.

Thanks Logbook and Slagenthor. Extremely useful information, as I have come to expect on this forum.

Apologies, I was being rather loose in my terminology. I meant to say for the purposes of insulation at high voltages and frequencies.

This forum has already been very helpful in refining my ideas. I have another question about an application involving high power em fields at between 1 to 2.5GHz: What is the best dielectric to use at these frequencies? I'm thinking about a material to bind copper wire strands together (may...

Thanks for the info on Litz, Logbook. I may now have a solution to the skin effect, but need to do some calcs/simulations. Any other useful ideas? I'm also interested in material current density. I have always assumed that non-cooled copper can handle about 10A/mm2, is this about right? Likely...

Some good pointers Higgler. Thanks

Again, thanks guys. I am actually considering litz wire. I'm not sure what weave I should go for, for the frequencies of interest to me (~1GHz, maybe 2.45GHz). Likely I would need to have something made up especially, but couldn't find much design information on Google. It needs to have very...

Thanks for the info so far guys. Maybe I should look more closely at LTS as well. What method of cooling is normal? Hmmm, not really skogsgurra. As I understand it the skin effect limits the depth of usefull conductor. A bundle of thin wires will allow only the outer ones to conduct...

Simulation of fields in a cavity is a good summation. The ability to, say, predict interaction of an aerial with the cavity while simulating skin effect would also be useful. At this point I'm assuming (perhaps falsely) that I won't have to simulate the generator and feedlines. Smith chart...

What is state of the art in superconductor technology? Are there any recommended suppliers of the stuff, or is it still at the Witch's brew stage? Recommended links will do fine. I'm interested in a high power, high frequency, application. At this stage I am as interested in evaluating it's...

Thanks BrianR, you really are helping me to think this thing through...

Thanks for the info IMMG. Are there any codes you recommend particularly? Again cash is tight so just something for an initial looksee will do me. Thanks for the ideas GOTWW. Sorry I can't say more about my application. May be subject to intellectual property rights, and is likely to generate a...

Some really useful info BrianR - Thanks. The overiding impression I am getting is that I was way overoptomistic to assume I could use transisors, even GaAs MOSFETS. Howabout designing a fixed frequency power resonator? Is there a better method than simply using feedback though a Power amp...

Interesting BrianR, some very useful pointers... Any books I should read to get me up to speed on this sort of design, using valves in particular? Do you have any links, for sites dealing in military disposals market?

Hmmm, interesting - have to think up a good commercial justification for "trying out" this code...

After posting on the "Antenna & Propagation engineering" forum, I have decided that this forum may offer the answers I need. I am involved in a post grad research project for material testing (welds in particular), and need assess the viability of several RF techniques. My first question: I...

Thanks Comcokid. This forum really is every bit as usefull as i had heard! Changed my approach to the problem completely! Howabout freeware for EM simulation? Are there any limited versions i can get hold of for some initial design studies? If i am going to microwaves I will need to...