28 and 38 GHz Colpitts Oscillator MMICs With Low Phase Noise, High-Power and High DC-to-RF Efficiency.

The article informs about how millimetre (mm) Wave frequency sources with low phase noise, low-power dissipation and sufficient output power are essential elements of wireless communication systems. Topics include how Pseudomorphic High Electron Mobility Transistor (PHEMT) is suitable for modern wireless communications due to its single supply voltage and low knee voltage; and how to achieve high oscillating frequency, a modified Colpitts topology was adopted to achieve higher output power.