Transmission-Line Baluns

[@mr1enrollment]

Looking forward to next video, thanks.

[@BartKus]

Excellent episode! At the risk of being annoying, would like to ask once again if you could expand this series to include wideband binocular core coax baluns used for RF in/out matching in power amps. Thanks either way though, your content is awesome.

[@FesZElectronics]

I guess this would be an interesting extension of the transmission line balun discussion; I'll have to look into this in more detail

[@gretalaube91]

Great explanation! I am having trouble measuring Vp of some unknown cable. Your talk helped me realize I am not crazy, and that the balun SHOULD work..... The sections should be "close enough".

[@layt01]

Very very good and useful video, thanks.

[@bogdan1543]

Super ! Are you planning to do some videos on IBIS modelling?

[@FesZElectronics]

I do not have any plans on that at the moment.. maybe sometime in the future, but I cannot promise anything

[@bogdan1543]

@@FesZElectronics OK, thank you. Would be interesting.

[@StreakyP]

is there a problem with how radio amateurs are implementing the 1:4 balun (direct & half wave delay)?.... on the circuit diagrams there is an earth to both ends of the screen.... for amateur applications this type of balun is often used externally right at the elevated terminals of a folded dipole to connect the co-ax.... at this point there is no ground connection so although the 3 antenna ends of the screen are tied together they are not grounded and are left floating..... is there a problem here?... I cannot see the return path for the signal travelling down the central core... forgetting the balun I see this like the coax having a radiating 50ohm quarter wave on the central core but an open connection to the screen at the antenna (no radials, no ground plane, no earth) in which case things are not going to work properly. Are we amateurs currently doing things wrong?

[@threeMetreJim]

I always considered that the co-ax outer is at RF ground, that's pretty much the definition of unbalanced. All the grounds are connected together. I have seen simulations that need a ground on each end of the line as simulated, just so that it works correctly.