Differential Matching-Calculation of Matching Filters

Differential Matching-Calculation of Matching Filters for SAW filters ?
How to match Differential line ?

http://web.doe.carleton.ca/~nagui/Ap...988-2922EN.pdf
http://www.maxim-ic.com/appnotes.cfm/appnote_number/916
http://rfdesign.com/images/archive/304Lee14.pdf