The other day I tried the program. Well done! I shake a hand to the author. The author is well done!
I already have thoughts on how to make a good addition. The main minus of what is now is a very uneven input and output impedance. The authors solves this problem by applying ATT at the input / output, but this is "сrutches". There are special MMICs with regulated entry and exit with a good S11 and S22 - this is MGA30889. The only thing that upsets is that it is available - it only works up to 3GHz. But, in principle, what is available for immediate tasks is suitable. With additional ATT at the input / output of these MMIS - we get an almost perfect 50-ohm path! Also, I found a wider chip with good S11 and S22 - HMC482