Why the inductor equation is different in this paper

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circuitking

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Hi I was reading the paper "A high Linearity Tapered Distributed Amplifier for Ultra Wideband Application" and I saw the equation for inductance of the artificial line has division by 2. As per equation 1 in the below figure, I think the Lb equation should not have /2 in equation (2). Could someone tell why is it like this? Thanks

 

Yes, expression looks erroneous at first sight. L and C in Z0 formula are per unit length, e.g. per amplifier stage.
 

FvM said:
Yes, expression looks erroneous at first sight. L and C in Z0 formula are per unit length, e.g. per amplifier stage.
Click to expand...

So the correct equation for Lb in equation (2) is without /2
 

circuitslave said:
I saw the equation for inductance of the artificial line
Click to expand...
This is not transmission line.
This is a cascaded connection of constant K section(L/2, C/2).

circuitslave said:
As per equation 1 in the below figure,
I think the Lb equation should not have /2 in equation (2).
Could someone tell why is it like this?
Click to expand...
Understand things correctly,
This is very true for all your posts.
 

So the correct equation for Lb in equation (2) is without /2
Click to expand...
I think it is, but why don't you check yourself which solution achieves better impedance matching?
 
pancho_hideboo said:
Understand things correctly,
This is very true for all your posts.
Click to expand...

True. I should think and imagine more.



[found at: slideplayer. com/ slide /4173361 /13 /images /8 /Constant-k+section+for+Low-pass+filter+using+T-network.jpg]
 
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The delay matching by using lumped components using the approach shown in the figure completely disregards the effect of Cbc. Also, Cbe varies quiet a bit with the instantaneous voltage on the base. Does it work for large input powers?
 

vivekroy said:
The delay matching by using lumped components using the approach shown in the figure completely disregards the effect of Cbc.
Also, Cbe varies quiet a bit with the instantaneous voltage on the base.
Does it work for large input powers?
Click to expand...
This figure shows only concept.

I don't think distributed amplifier of BJT is possible, even if cascode structure is used as unit amplifier.
 

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