The CHV2241 is a monolithic multifunction proposed for frequency generation and transposition. It integrates a K-band oscillator, a Q-band harmonic mixer and buffer amplifiers. For performance optimisation, an external port (ERC) allows a passive resonator coupling to the oscillator (at half output frequency). All the active devices are internally self biased. The circuit is manufactured with the P-HEMT process : 0.25m gate length, via holes through the substrate, air bridges and electron beam gate lithography.