I cant seem to find your document on “How to use Qucs”.  On the QUCSTRANS form, can you tell me what H_t parameter is?  I understand what H and T are from your coupler tutorial but what is H_t?  I have change the value of H and T but H_t is not a function of these parameters.  I am trying to design a microstrip coupler but I am not sure how to fill in the parameters.


Please assist.



Thank you,



P.S. This tool looks pretty sweet.  Good job.