Synthesize and simulate symmetrical branch line couplers.
There are currently three ways to use this package.
# Create a coupler
# a is the vector of branch line immittances
# b is the vector of series line immittances
# For now, they should be normalized to 1
a = fill(Float64, 1.0)
b = fill(Float64, 1.0)
coupler = Coupler(a, b)
# Analyze coupler
# Returns, respectively, the reflection coefficient
(Γ, D, IL, C) = The procedure used in this package to synthesize and analyze symmetrical branch-line directional couplers is based on:
- R. Levy and L. F. Lind, "Synthesis of Symmetrical Branch-Guide Directional Couplers," in IEEE Transactions on Microwave Theory and Techniques, vol. 16, no. 2, pp. 80-89, February 1968, doi: 10.1109/TMTT.1968.1126612.
It can be readily extended to asymmetrical couplers using the extension given by:
- A. Buesa-Zubiria and J. Esteban, "Design of Broadband Doubly Asymmetrical Branch-Line Directional Couplers," in IEEE Transactions on Microwave Theory and Techniques, vol. 68, no. 4, pp. 1439-1451, April 2020, doi: 10.1109/TMTT.2019.2953904.