Low Noise Amplifiers for 94 GHz Cloud Radar

Kärkkäinen, Mikko ; Varonen, Mikko ; Kantanen, Mikko ; Karttaavi, Timo ; Kangaslahti, Pekka ; Halonen, Kari (2004) Low Noise Amplifiers for 94 GHz Cloud Radar. In: Gallium Arsenide applications symposium. GAAS 2004, 11—12 Ottobre, Amsterdam.
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Abstract

Four low noise amplifiers for 94 GHz cloud radar are presented. One LNA is designed using coplanar waveguides and the others use microstrip lines. The designed amplifiers were manufactured with a metamorphic high electron mobility transistor (MHEMT) technology and the chip size is 2.1 mm x 1.1 mm. The four stage LNAs have either 2x25 µm or 4x25 µm size MHEMTs. The scattering parameters and the noise figures of the amplifiers were measured at W-band and the results are presented. The best measured gain at 94 GHz was 16 dB and the noise figure 5.7 dB using a 2.5 V supply voltage and a drain current of 15 mA per stage. Furthermore, one of the amplifiers was assembled in a package that has WR-10 waveguide interfaces. The packaged chip exhibited 10.8 dB of gain and the noise figure was 8 dB at 94 GHz.

Abstract
Document type
Conference or Workshop Item (Paper)
Creators
CreatorsAffiliationORCID
Kärkkäinen, Mikko
Varonen, Mikko
Kantanen, Mikko
Karttaavi, Timo
Kangaslahti, Pekka
Halonen, Kari
Subjects
DOI
Deposit date
15 Jun 2005
Last modified
17 Feb 2016 14:09
URI

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