New to field - Need advice

Hi all,
I am basically a guy who does more of Antenna simulations and EM theory stuff. I am now looking at learning microwave circuit design as I am currently working on a Masters project and have some spare time. I have resonable aptitude in transistor circuits and have a good idea of the basics of microwave engineering ( transmission lines , ABCD and S parameters etc. )From here how do I go towards circuit design in the Radio Frequency range. Thanks for all your time.

-Arun

I would suggest "RF Design Guide" by Vizmuller for the RF system perspective and "Microwave Transistor Amplifiers" by Gonzales for amplifier design. With your background, Gonzales will be an easy read.