NDLI: Design of an oscillator with low phase noise and medium output power in a 0.25 µm GaN-on-SiC high electron-mobility transistors technology

Content Provider	IET Digital Library
Author	Liu, Hang Zhu, Xi Boon, Chirn Chye Yi, Xiang
Abstract	To investigate the effects of both the drain and gate bias voltages on the performance of GaN high electron-mobility transistors (HEMT) oscillator, a 0.25 µm GaN-on-SiC HEMT oscillator is presented in this study. Utilising the designed oscillator, the trade-off between phase noise and output power is effectively investigated at the circuit level. As a result, the designed oscillator can provide low phase noise and medium output power simultaneously. The phase noise at V GS = −2.3 V and V DS = 3.3 V is measured to be −112 dBc/Hz and −143 dBc/Hz at 100 kHz offset and 1 MHz offset, respectively, from a 4.954 GHz carrier, with an output power of more than 14 dBm. Moreover, the output power can be boosted to 26 dBm, if a drain bias 16 V is used, while good phase noise of −132 dBc/Hz @ 1 MHz is still achievable. The achieved phase noise is low among all reported GaN HEMT oscillators. This work has successfully demonstrated that the monolithic oscillator fabricated in GaN-on-SiC HEMT technology features low phase noise as well as medium output power simultaneously.
Starting Page	795
Ending Page	801
Page Count	7
ISSN	17518725
Volume Number	9
e-ISSN	17518733
Issue Number	Issue 8, Jun (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/9/8
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2014.0449
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2015-01-13
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Circuit Level Field Effect Device Gallium Compound GaN HEMT Oscillator GaN-on-SiC HEMT GaN-SiC High Electron Mobility Transistors High Electron-mobility Transistors III-V SemiConductor Low Phase Noise Medium Output Power Monolithic Oscillator Oscillator Phase Noise Silicon Compound Size 0.25 Mum Solid State Microwave Circuit And Device UHF Oscillator Voltage -2.3 V Voltage 3.3 V Wide Band Gap SemiConductor
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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