I am a big fan of your videos. I love the fact that you mathematically derive your explanations. I have noticed that there is a "dearth" of microwave theory textbooks, or lab manuals for that matter, that set forth the underlying mathematics of simple RF network analysis equations - simple transmission line problems for complex series and parallel networks. Could you recommend a couple of microwave theory textbooks (or lab manuals) that derive their equations and support their equations with "enumerated" examples (I am really looking for "textbooks" with enumerated solutions)?
Thanks so much. Unfortunately I have not seen a RF book that does what you are talking about, which is a shame. In my observation, it looks like RF and microwave text book are regurgitations of previous ones, especially with waveguide. It’s a bunch of vector calculus with no real world examples. I wish I could be more help.
Maybe if we used sulfur hexafluoride gas SF6 as a wave guide quench gas, we could push more power. I guess we would have to shield the outside as well as the inside.
Microwaves _are_ analog! They're just in one of the gaps in our analog ranges of perception. Too fast to hear; too slow to see. As far as I know, Old Hack hasn't uploaded anything that _isn't_ about analog, and I love him for that. None of that digital rubbish on this channel!
If you had asked me before watching this, I would have assumed that breakdown voltage increased with less air. I find it very counter intuitive that less air means less power. I'm guessing that it starts to curve back up once you get near vacuum, since there's nothing to ionize?
So what does that mean for waveguides in space, it looks like its down to a few watts would that be right? or is voltage breakdown in space much higher as there is no air
The next regime of microwave mayhem for space applications is known as multipaction or multipactor. It is a resonance breakdown phenomena requiring both a vacuum (no air) and radiation (free electrons) environment.
@@oldhackee3915 Your plot is fine. There is a lot of interesting Physics summarized in a Paschen Diagram, especially that the x-axis is product fo frequency*dimension.
Thank you for your great videos!!
Thanks very much.
Eagerly waiting for new video
Another is coming soon.
I am a big fan of your videos. I love the fact that you mathematically derive your explanations. I have noticed that there is a "dearth" of microwave theory textbooks, or lab manuals for that matter, that set forth the underlying mathematics of simple RF network analysis equations - simple transmission line problems for complex series and parallel networks. Could you recommend a couple of microwave theory textbooks (or lab manuals) that derive their equations and support their equations with "enumerated" examples (I am really looking for "textbooks" with enumerated solutions)?
Thanks so much. Unfortunately I have not seen a RF book that does what you are talking about, which is a shame. In my observation, it looks like RF and microwave text book are regurgitations of previous ones, especially with waveguide. It’s a bunch of vector calculus with no real world examples. I wish I could be more help.
Maybe if we used sulfur hexafluoride gas SF6 as a wave guide quench gas, we could push more power. I guess we would have to shield the outside as well as the inside.
Thanks for the comment. That sounds interesting.
If the capacitance not change and dielectric looses not going to be mutch higher than as air use as insulator.
@@Duracellmumus So does that mean we can't use wave guides in the vacuum of space without the dielectric of air?
Please upload some analog stuff 😊
Too much microwaves for you?
@@oldhackee3915 There's never *too much* microwaves!
Microwaves _are_ analog! They're just in one of the gaps in our analog ranges of perception. Too fast to hear; too slow to see.
As far as I know, Old Hack hasn't uploaded anything that _isn't_ about analog, and I love him for that. None of that digital rubbish on this channel!
If you had asked me before watching this, I would have assumed that breakdown voltage increased with less air.
I find it very counter intuitive that less air means less power.
I'm guessing that it starts to curve back up once you get near vacuum, since there's nothing to ionize?
Indeed. I found the Wikipedia page to help me understand. en.m.wikipedia.org/wiki/Paschen's_law
So what does that mean for waveguides in space, it looks like its down to a few watts would that be right? or is voltage breakdown in space much higher as there is no air
The voltage breakdown goes back up in a vacuum. The Wikipedia page on Paschen’s Law the graph is better than mine as it approaches a vacuum.
The next regime of microwave mayhem for space applications is known as multipaction or multipactor. It is a resonance breakdown phenomena requiring both a vacuum (no air) and radiation (free electrons) environment.
@@oldhackee3915 Your plot is fine. There is a lot of interesting Physics summarized in a Paschen Diagram, especially that the x-axis is product fo frequency*dimension.
Look-up Hatch & Williams regarding Multipaction.
Thanks for the comment.