Back to Search
Start Over
AlN/GaN/InGaN Coupling-Channel HEMTs for Improved gm and Gain Linearity.
- Source :
- IEEE Transactions on Electron Devices; Jul2021, Vol. 68 Issue 7, p3308-3313, 6p
- Publication Year :
- 2021
-
Abstract
- In this article, we report on the effective transconductance (g<subscript>m</subscript>) and gain linearity improvement of submicrometer gate AlN-barrier-based transistors using GaN/InGaN coupling-channel structures. The fabricated AlN/GaN/InGaN coupling-channel high electron mobility transistor (CC-HEMT) showed flat g<subscript>m</subscript> profile, greatly reduced g<subscript>m</subscript> derivatives, and constant dynamic source resistance compared with an AlN/GaN HEMT using the same fabrication process. The highest extrinsic current gain cutoff frequency (ƒ<subscript>T</subscript>) of 55 GHz and the maximum oscillation frequency (ƒ<subscript>max</subscript>) of 80 GHz were obtained for 0.15- μm gate-length transistors, both of which remain constant values across wide input voltage (V<subscript>GS</subscript>) of 4 V. Moreover, a significant theoretical OIP3 value boost by 7.1 dB has been observed using the CC-HEMT as compared to the AlN/GaN HEMT. The superior linearity performance of the CC-HEMT can be attributed to the strong channel-to-channel coupling effect. The drain bias-dependence of g<subscript>m</subscript>, ƒ<subscript>T</subscript>, and ƒ<subscript>max</subscript> versus V<subscript>GS</subscript> profiles illustrate that the linearity characteristics of the CC-HEMT greatly improve with an increase in V<subscript>DS</subscript>. These results demonstrate the AlN/GaN/InGaN material system as a viable platform for high frequency requiring high-linearity applications. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00189383
- Volume :
- 68
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Electron Devices
- Publication Type :
- Academic Journal
- Accession number :
- 151778355
- Full Text :
- https://doi.org/10.1109/TED.2021.3082104