Enquiry on single exponential finline taper

Hi everyone,

I have some doubt as above. Under the single exponential profile, there is this equation d(z)=d2+(d1-d2)*(1-z/L)^T. it was mentioned by Saad(1983) that T is 1.3 for the taper from full waveguide height to d/b=0.1 ( d=slot width, b=height of the waveguide).

My question is that if the d/b is not equal =0.1, what would the value be? How do the value of 1.3 arrived to this from d/b=0.1 in the first place?


Thanks

could anyone help pls?

Hi,
Do you have any success on the Finline design with HFSS

Thanks