A 108 GHz GaAs MHEMT VCO MMIC

A W-band VCO MMIC is first time reported in this paper in China, To eliminate the parasitic resistance of the oscillator loop, this chip utilizes the source capacitive feedback forming the negative resistance. Through the reasonable output matching network, the chip also realize the frequency start-up condition and restrain the output harmonic. Finally, Fabricated by the NEDI's 0.15 um GaAs MHEMT technology, the mmic typically oscillates at the 108 GHz and ranges from 106.8 GHz to 108.4 GHz, voltage-controlled-bandwidth and typical output power achieves 1.6 GHz and -8.5 dBm respectively.