That's at least 4 orders of magnitude too large an inductor for 1.2GHz! It will filter out noise in the 10kHz to 100kHz range pretty well and have a self-resonant frequency around 1MHz I suspect. For 1.2GHz you use ferrite beads threaded on the power rails, and plenty of ceramic decoupling. Each RF section in its own metal box with feed-thru caps to route power and low-freq signals in and out is standard - have a look at some amateur radio UHF transmitter designs,