Guilin Sun
Ansys Employee

You are completely correct and it is expected. Please check this article:

Basically, it calculates the angular propagation constant and converts it to the linear porpagation constant:

while the angular "beta" is constant, the radius ca be arbirary. Therefore, you will need to correct the result usingĀ 


then the result will be constant when you change the bent center and bending radius. Please try and let me know if you have question.