Meter-scale High-temperature Superconducting RF Waveguides with Integrated Filters and Attenuators

Solovyov, Vyacheslav F.; Kim, Hyunwoo; Nykypanchuk, Dmytro; Farrell, Paul

doi:10.1109/tasc.2025.3538630

Title: Meter-scale High-temperature Superconducting RF Waveguides with Integrated Filters and Attenuators

Journal Article · 04 February 2025 · IEEE Transactions on Applied Superconductivity

DOI: https://doi.org/10.1109/tasc.2025.3538630 · OSTI ID:2511268

Solovyov, Vyacheslav F. ^[1]; Kim, Hyunwoo ^[2];

^[3]; Farrell, Paul ^[2]

Brookhaven Technology Group, Inc., Stony Brook, NY (United States); Brookhaven Technology Group
Brookhaven Technology Group, Inc., Stony Brook, NY (United States)
Brookhaven National Laboratory (BNL), Upton, NY (United States)

Here, we report the performance of coplanar, multifilament waveguides manufactured from crystalline films of a well-known HTS compound, YBCO, transferred to a low-loss dielectric substrate, such as E-Kapton. The coplanar two-line waveguide delivers low cross-talk, below 20 dB level, and low attenuation, below 4 dB/m at 6 GHz, 77 K. Controlled-impedance 50 Ω waveguides would require a method for reliable patterning narrow, less than 100-micron wide, YBCO traces over a meter length. We report a lithography-etching approach that minimizes the difference in the etching rate of YBCO and the metallization layers of Ag and Cu. An array of metalized vias isolates the traces. We describe the via metallization process that is not damaging to YBCO and compatible with dense, 2 mm period, arrays of vias.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States); Brookhaven Technology Group, Inc., Stony Brook, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: SC0012704; SC0021707

OSTI ID:: 2511268

Report Number(s):: BNL--227950-2025-JAAM

Journal Information:: IEEE Transactions on Applied Superconductivity, Journal Name: IEEE Transactions on Applied Superconductivity Journal Issue: 5 Vol. 35; ISSN 1051-8223

Publisher:: IEEECopyright Statement

Country of Publication:: United States

Language:: English

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75 CONDENSED MATTER PHYSICS
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Title: Meter-scale High-temperature Superconducting RF Waveguides with Integrated Filters and Attenuators

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References (15)

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