Synthesis of symmetrical branch guide driectional couplers,Filter design

[hellotoke]

Want to know how to implement the highligted part in code or what it means |re/Te|^2 .Any advice will be appreciated.
Its from a paper Synthesis of symmetrical branch guide driectional couplers by Ralph levy.

 

[Orzel Bialy]

Hi! In my opinion, the theory and practice of symmetrical couplers is well outlined here:
1) https://core.ac.uk/download/pdf/9257273.pdf
2) https://etheses.bham.ac.uk/id/eprint/3682/1/Lu12MPhil.pdf

 

[hellotoke]

Hi! In my opinion, the theory and practice of symmetrical couplers is well outlined here:
1) https://core.ac.uk/download/pdf/9257273.pdf
2) https://etheses.bham.ac.uk/id/eprint/3682/1/Lu12MPhi

will take a look at it,thanks