Conference Proceeding

220 GHz Low-Noise Amplifier Modules for Radiometric Imaging Applications

Fraunhofer Inst. for Appl. Solid State Phys., Freiburg
10/2006; DOI:10.1109/EMICC.2006.282770 pp.137 - 140 In proceeding of: European Microwave Integrated Circuits Conference, 2006. The 1st
Source: IEEE Xplore

ABSTRACT G-band low-noise amplifier (LNA) modules have been successfully developed for use in high-resolution radiometric imaging applications. The WR-5 waveguide modules contain a four-stage 220 GHz cascode LNA MMIC and two microstrip-to-waveguide transitions which were realized on 50 mum thick quartz substrates. The monolithic amplifier circuits were fabricated using a well proven 0.1 mum InAlAs/InGaAs metamorphic high electron mobility transistor (MHEMT) technology in combination with grounded coplanar waveguides (GCPW). Furthermore, an MMIC based 220 GHz direct detection radiometer was developed, for the first time, containing three amplifier modules connected in series and demonstrating a small-signal gain of more than 50 dB over the frequency range from 209 to 217 GHz

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Keywords

220 GHz direct detection radiometer
 
coplanar waveguides
 
four-stage 220 GHz cascode LNA MMIC
 
frequency range
 
high-resolution radiometric imaging applications
 
MHEMT
 
microstrip-to-waveguide transitions
 
MMIC
 
proven 0.1 mum InAlAs/InGaAs metamorphic
 
WR-5 waveguide modules