Low Phase Noise 38GHz 20 dBm Source for PCN Radio Links

This paper describes-the first Low Cost, Low Phase Noise Source using Silicon Bipolar Transistor, GaAs PHEMT frequency multipliers and a GaAs PHEMT MMIC amplifier to achieve 20 dBm at 36 to 40 GHz. This source includes a Si MMIC prescaler to achieve an L-Band output for easy phase locking of the RF source. Phase noise of better than ¿85 dBc/Hz at 100 KHz offset has been achieved at 40 GHz to help meet the system requirements of the PCN digital radio link.