High Performance 200GHz Two Way Combined G-band Power Amplifier for
Short Range Imaging Applications
Abstract
A 2-way combined G-band differential power amplifier (PA) designed using
a 130-nm SiGe BiCMOS technology is shown in this work. A differential PA
is designed at 200GHz using cascode topology (CT) resulting in an
overall gain and saturated output power of >27 dB and
>16.5dBm respectively. To complete the design of the 2-way
combined PA, a balun was also loaded with two differential PAs which
improved the bandwidth to 80GHz. The area occupied by the chip
of the manufactured PA was 0.55 mm2, which
demonstrates a reduction of 59.25 % when compared to the existing
approach. Simulation results showed that the 2-way combined G-band PA
achieved a peak gain of 27dB, which showed of 4.24% increase in the
gain obtained when compared with the 4-way combined PA, which was
25.9dB. Additionally, the 2-way combined G-band PA achieved a PAE value
of 5.4%, which demonstrated a percentage increase of 54.2% in
comparison to the 4-way combined PA, which had a PAE of 3.5%. As a
result, a 3.3% decrease was observed in the DC power consumed by the
2-way combined G-band PA.