Microwave amplifier characteristics - don't undertand
noise figure: the ratio between output and input SNR, usually measured at some minimum input power level.

P1dB: 1 dB compression level. The input power level that  causes the gain to be reduced by 1 dB from the small signal value.

IP3: 3rd-order intercept point, the input power level at which we expect (usually by extrapolation from lowe-power operation) the 3rd harmonic output due to gain nonlinearity to equal the fundamental frequency output. 


  How did they make this amplifier?


It's probably a single chip, connected to the input/output ports by microstrip lines. Single-chip ampflifiers with bandwidth of 10-40 GHz are not difficult to find from specialist RF chip vendors such as Analog Devices (formerly Hittite Microwave), M/A-Com, Triquint, etc.). They may use GaAs or InP chips rather than silicon.