Why the inductor equation is different in this paper

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.

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

This is not transmission line.
This is a cascaded connection of constant K section(L/2, C/2).

Understand things correctly,
This is very true for all your posts.

I think it is, but why don't you check yourself which solution achieves better impedance matching?

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]

Delay line in your figure is composed from 8 sections of Constant-K(L/2, C/2).

Never 5 sections.

No.
This is two sections of Constant-K

Unit section of Constant-K is L-network.
Two L-network constitute T or PI.

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?

This figure shows only concept.

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