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2-6 GHz GaN MMIC Power Amplifiers for Electronic Warfare Applications

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6 Author(s)
Gonzalez-Garrido, M.A. ; ETSIT, Univ. Politec. de Madrid, Madrid ; Grajal, J. ; Cubilla, P. ; Cetronio, A.
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This paper presents two MMIC broadband high power amplifiers of 4 mm of periphery at the output stage in the frequency band 2-6 GHz. The amplifiers are based on Al-GaN/GaN high electron mobility transistor (HEMT) technology on SiC substrate. They have been fabricated in two different european foundries: SELEX Sistemi Integrati and QINETIQ. SELEX has a gate process technology of 0.5 mum, and devices of 10times100 mum periphery in microstrip technology and QINETIQ has a gate-length of 0.25 mum, and devices of 8times125 mum in coplanar technology. The coplanar amplifier from QINETIQ has demonstrated an output power of 8 W in continuous wave at Vds=20 V which confirm model predictions. On the other hand, SELEX microstrip amplifier has a saturation power of 10 W CW at Vds=25 V and 4 GHz. This amplifier measured on-wafer in pulsed conditions exhibits a maximum power of 17 W at Vds=30 V.

Published in:

Microwave Integrated Circuit Conference, 2008. EuMIC 2008. European

Date of Conference:

27-28 Oct. 2008

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