The HMC431LP4E is a GaAs InGaP Hetero-junction Bipolar Transistor (HBT) MMIC VCO with an integrated resonator, negative resistance device, varactor diode and buffer amplifier. The VCOs phase noise performance is excellent over temperature, shock, vibration and process due to the oscillator"s monolithic structure. Power output is 2dBm typical from a 3V supply voltage. The voltage controlled oscillator is packaged in a leadless surface mount package.