Wideband matching network design
I've developed a tool (based on the algorithms described in [2]) for matching a frequency dependent complex source to a frequency dependent complex load impedance. It is still WIP, but I think it works a treat. You'll have to compile that from the source and provide the impedances to match as s1p files.

https://github.com/Qucs/qucs/pull/555

On the other hand, Keysight ADS comes with a similar tool based on the RFT and the analytic methods.

Some references:

[1] Wideband circuit design. H.J. Carlin. 1998. CRC Press

[2] http://ethw.org/images/a/a6/RF_Networks_OCR.pdf

Hope it helps