High frequency design challenges

[abhijitrc]

Hi,

Already in so many threads discontinuity have been discussed, now i have to design two driver amplifier circuits operating at 14 GHz and 17 GHz respectively. I am using a nonlinear model that will work upto 20 GHz, since 17 GHz is higher than 14 GHz, what are the typical problem i will face while designing the circuit at 17 GHz !!!, plz suggest me a suitable answer as this may be my viva question >>>>

abhijitrc

 

[abhijitrc]

Kindly help me to give a suitable answer. How the discontinuities are severe in high frequency design?????????????