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Note: Cryogenic microstripline-on-Kapton microwave interconnects

Harris, A. I. and Sieth, M. and Lau, J. M. and Church, S. E. and Samoska, L. A. and Cleary, K. (2012) Note: Cryogenic microstripline-on-Kapton microwave interconnects. Review of Scientific Instruments, 83 (8). Art. No. 086105. ISSN 0034-6748.

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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.

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Harris, A. I.0000-0001-6159-9174
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.
Funding AgencyGrant Number
Subject Keywords:cryogenic electronics, focal planes, interconnections, microstrip lines, microwave devices, printed circuits, radiometers
Issue or Number:8
Classification Code:PACS: 07.60.Dq; 84.40.Az; 85.60.Gz. IPC: H01P3/00; H01P3/08; H04N5/30; H05K1/00.
Record Number:CaltechAUTHORS:20121030-102314322
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Official Citation:Note: Cryogenic microstripline-on-Kapton microwave interconnects A. I. Harris, M. Sieth, J. M. Lau, S. E. Church, L. A. Samoska, and K. Cleary, Rev. Sci. Instrum. 83, 086105 (2012), DOI:10.1063/1.4737185
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:35174
Deposited By: Tony Diaz
Deposited On:31 Oct 2012 18:10
Last Modified:09 Mar 2020 13:18

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