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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 50Ω 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
20140010491
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
External Source(s)
doi:10.1063/1.4869038
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)
Rostem, K. (Johns Hopkins Univ. Baltimore, MD, United States)
U-Yen, K. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 6, 2014
Publication Date
January 1, 2014
Publication Information
Publisher: Astro-Ph
Subject Category
Astrophysics
Report/Patent Number
GSFC-E-DAA-TN14707
Report Number: GSFC-E-DAA-TN14707
Funding Number(s)
CONTRACT_GRANT: NNX09AC98A
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
thermal blocking filters
cryogenic microwave applications
graceful degradation

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