Published August 2012
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Journal Article
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Note: Cryogenic microstripline-on-Kapton microwave interconnects
Abstract
Simple broadband microwave interconnects are needed for increasing the size of focal plane heterodyne radiometer arrays. We have measured loss and crosstalk for arrays of microstrip transmission lines in flex circuit technology at 297 and 77 K, finding good performance to at least 20 GHz. The dielectric constant of Kapton substrates changes very little from 297 to 77 K, and the electrical loss drops. The small cross-sectional area of metal in a printed circuit structure yields overall thermal conductivities similar to stainless steel coaxial cable. Operationally, the main performance tradeoffs are between crosstalk and thermal conductivity. We tested a patterned ground plane to reduce heat flux.
Additional Information
© 2012 American Institute of Physics. Received 1 June 2012; accepted 26 June 2012; published online 3 August 2012. This work was supported by NSF Grant No. ATI-0905855 (ARRA). We thank A.W.R. for providing access to Microwave Office under its University Program. We benefited from conversations with Dr. M. Morgan of the National Radio Astronomy Observatory.Attached Files
Published - RevSciInstrum_83_086105.pdf
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Additional details
- Eprint ID
- 35174
- Resolver ID
- CaltechAUTHORS:20121030-102314322
- ATI-0905855
- NSF
- Created
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2012-10-31Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field