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Impedance Matched Absorptive Thermal Blocking FiltersWe have designed, fabricated and characterized absorptive thermal blocking filters for cryogenic microwave applications. The transmission line filter's input characteristic impedance is designed to match 50 Omega and its response has been validated from 0-to-50GHz. The observed return loss in the 0-to-20GHz design band is greater than 20 dB and shows graceful degradation with frequency. Design considerations and equations are provided that enable this approach to be scaled and modified for use in other applications.
Document ID
20150011007
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Wollack, E. J. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Chuss, D. T. (NASA Goddard Space Flight Center Greenbelt, MD United States)
U-Yen, K. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Rostem, K. (Johns Hopkins Univ. Baltimore, MD, United States)
Date Acquired
June 17, 2015
Publication Date
March 24, 2014
Publication Information
Publication: Review of Scientific Instruments
Publisher: Review of Scientific Instruments
Volume: 85
Issue: 3
Subject Category
Astrophysics
Report/Patent Number
GSFC-E-DAA-TN21459
Funding Number(s)
CONTRACT_GRANT: NNX09AC98A
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
cryogenic microwave applications
graceful degradation
thermal blocking filters

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