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Group III-Nitride LNAs for Microwave Radiometry

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNX11CF28P
Agency Tracking Number: 104508
Amount: $100,000.00
Phase: Phase I
Program: SBIR
Solicitation Topic Code: S1.03
Solicitation Number: N/A
Solicitation Year: 2010
Award Year: 2011
Award Start Date (Proposal Award Date): 2011-02-18
Award End Date (Contract End Date): 2011-09-30
Small Business Information
MN, Minneapolis, MN, 55406-1575
DUNS: 832797158
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Jody Klaassen
 Principal Investigator
 (612) 226-1249
Business Contact
 Jody Klaassen
Title: Business Official
Phone: (612) 226-1249
Research Institution
This phase I proposal addresses the need for microwave and millimeter wave Low Noise Amplifiers (LNAs) for remote sensing applications of the earth's atmosphere. In this work, IIIAN proposes using group III-nitride materials, specifically AlGaN/GaN HEMT structures, to fabricate LNAs for microwave radiometers operating from 165 GHz up to 270 GHz. The group III-nitrides have excellent physical properties for high frequency transistors with the added benefit that the high breakdown voltage of the material renders them less susceptible to failure due to spurious strong signals, eliminating the need for protective circuitry between the antenna and the LNA.Passive microwave radiometers used in the PATH and GACM missions are used to quantify levels of trace species in the atmosphere such as O3, CO, N2O, HNO3, ClO and SO2, and also to estimate water content, both gas phase and as aerosols. The instruments used for these measurements rely on microwave emission from the relevant species. Key to such low signal level measurements are front-end LNAs used to amplify the weak microwave emission signal from the antenna prior to the RF detection diode.

* Information listed above is at the time of submission. *

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