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Hi, panchoo. I re-posted my problem in the forum you qoute. I you have time to look at it, and perhaps discuss this problem with me, i would love you for it.
Cheers,
Alex.
Re: PA stability
Finally somewhere this is discussed. I have been trying to find out if theory can be applied for more than one amplifier stage, but from what I've read, none of the existing theoretical approaches (Rollets, or mu-stability) can be applied for a cascade. Although, I was told by...
Hi, CST 2009 gives more accurate results all over? We are here talking about simple S-parameter analysis by loading in TOUCHSTONE blocks in design studio, attaching ports and then run the solver.
Hi, as per above, maybe I should clarify. Its probably the simplest thing you can do in CST...
HI, Last year I did a project where I mainly used CST Studio design for S-parameter analysis of different components, then I used the 2009 version.
This year I'm working on a larger project where I use some of the same components, and I use the 2010 version.
I just discovered something...
Hi,
I have read a bit about transistor design for amplifiers, the parameters that are needed for stability and how to design for stability etc.
However, it seems that for the most part, stability considerations and tests such as Rollets K-factor and the mu-parameter are meant for a lone...
You still around Keith? =)
I had to take a break on the PCB design. I'm still unsure about the darn circulator from a few posts back...
I'll try to break down the case in point:
* i have some QFN packages. In those, to ground the pads that should be grounded properly, I leave the pins...
Reviving an old topic to pose some new questions. (Nice eh? :) )
I'm using an ATC600S cap (47pF, 0603 size) as a DC-block at the input and output of a switch (operating between 3-4 GHz). I've been trying to read up on ESR, reactance, resonant frequencies etc etc.. but I'm having trouble...
Thanks Volker :)
I guess they are advanced enough to make pretty good estimates. Just got this idea in my head that maybe it could cause problems. But as you say, it would probably only be the case if there are few samples.
Yup, I too have used CST the same way.
Really I just wondered if it would be preferable to have the same frequency steps in all S2P-files. It does seem it doesn't matter, but it could be that since the simulator must estimate to get data at correct points, some (probably minor) error will be...
Thanks again Keith.
I've had some contact with the Dorado sales office in Sweden, but I haven't got an answer on the lead time .. So it may take a while to get the device :/
Anyways, to get going on the design I just designed a "prototype" device to use, as I need to get going on how to design...
Hi, I just have somewhat of a quick question about simulating with S-parameters.
Say you have a cascade of 2-port devices and you do a S-parameter analysis, perhaps with CST or matlab or any other program.
What I have noticed is that you seldom get S-parameters for all devices that lies...
Thank for a quick answer Keith, really appreciate it.
To be honest, this is the first time I'm making a board, Im just a student and we've not done this before in classes. I'm making a "prototype" front end of a radiometer for my masters degree.
I really don't know what's wierd and what's not...
Hi, can anyone give advice on how to create a land pattern for a circulator in Eagle?
I can't find any packages that look like a circulator in existing libs, and the datasheet does not specify the land pattern very well. Mainly they don't say anything about layers, soldermask or pad size. I...
Hi,
I was wondering if anyone could give me any insight in the difference between two types of terminations for SMD Multilayer ceramic capacitors.
AT Ceramics offers either "Solder Plate" or "Tin over Nickel". From my limited experience, Tin over Nickel is the usual type of termination. Does...
Well, sort of. All I know is that the signal has 401 sample points from 1Ghz to 12 Ghz. And that this is the bandwidth of the UWB pulse emitted.
I dont really know the time capture, It's just a reasonable guess, because this data is from an experiment that is comparable to other experiments of...
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