Study of the power performance of gaN based HEMTs with varying field plate lengths
Author
Kurt G.
Toprak, A.
Sen O.A.
Özbay, Ekmel
Date
2015Source Title
International Journal of Circuits, Systems and Signal Processing
Print ISSN
19984464
Publisher
North Atlantic University Union
Volume
9
Pages
174 - 179
Language
English
Type
ArticleItem Usage Stats
129
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Abstract
In this paper, we report the optimum power performance of GaN based high-electron-mobility-transistors (HEMTs) on SiC substrate with the field plates of various dimensions. The AlGaN/GaN HEMTs are fabricated with 0.6 µm gate length, 3 µm drain-source space. And also, the field plate structures with the lengths of 0.2, 0.3, 0.5, and 0.7 µm have been fabricated on these HEMTs. Great enhancement in radio frequency (RF) output power density was achieved with acceptable compromise in small signal gain. A HEMT of 0.5 µm field plate length and 800 µm gate width is biased under 35 V, at 3 dB gain compression, The results showed that we obtained a continuous wave output power of 36.2 dBm (5.2 W/mm), power-added efficiency (PAE) of 33% and a small signal gain of 11.4 dB from this device. We also could achieve a continuous wave output power of 37.2 dBm (5.2 W/mm), poweradded efficiency (PAE) of 33.7% and a small gain of 10.7 dB from another HEMT with 0.5 µm field plate length and 1000 µm gate width. These results were obtained at 8 GHz without using a via hole technology. The results seem very stunning in this respect. © 2015, North Atlantic University Union. All rights reserved.
Keywords
Coplanar waveguideField plate
GaN HEMT
Power amplifiers
RF power applications
Coplanar waveguides
Field effect transistors
Gallium alloys
Gallium nitride
Plates (structural components)
Power amplifiers
Radio frequency amplifiers
Silicon carbide
Continuous wave output power
Field plates
Field-plate structures
GaN HEMTs
High electron mobility transistor (HEMTs)
Output power density
Power-added efficiency
RF power applications
High electron mobility transistors
Permalink
http://hdl.handle.net/11693/23092Collections
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