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This paper reports on multi-decade bandwidth GaN HEMT cascode-distributed power amplifier designs which achieve performance from base-band to over 20 GHz. The GaN MMICs are based on a 0.2 mum AlGaN/GaN low noise T-gate HEMT technology with an fT ~ 75 GHz. To increase the MMIC power capability of this low noise GaN technology, a cascode DA design approach was employed which can operate at twice the...
This paper reports on a S-,C-band LNA-PA which achieves a sub-0.2 dB noise figure over a multi-octave band and a Psat of 2 Watts at a cooled temperature of -30degC. The GaN MMIC is based on a 0.2 mum AlGaN/GaN-SiC HEMT technology with an fT ~ 75 GHz. At a cool temperature of -30degC and a power bias of 15 V-400 mA, the MMIC obtains 0.25-0.45 dB NF over a 2- 8 GHz band and a linear PldB of 32.8 dBm...
A 0.2 mum T-gate GaN-SiC HEMT technology with fT-70 GHz are used to achieve GaN Darlington MMIC Amplifiers with bandwidths up to 18 GHz. Both conventional Darlington and Cascoded-Darlington feedback designs were fabricated and measured. The Darlington Cascode obtains 14.7 dB gain and a bandwidth of 0.05-12.3 GHz. The conventional Darlington obtains 11 dB gain and a record 0.05-18.7 GHz multi-decade...
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