Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Cryogenic Decade-Passband Superconducting Integrated Diplexer



Akim Babenko, GREGOR LASSER, Nathan Flowers-Jacobs, Justus Brevik, Anna Fox, ZOYA POPOVIC, Paul Dresselhaus


We demonstrate a decade-passband superconducting diplexer operating from dc to 27 GHz, integrated in a niobium, Josephson-junction(JJ)-compatible process. Both low- and high-pass branches are singly-terminated 5-pole Butter-worth filters with a 2.5 GHz cutoff. Several fabricated three-port diplexers are characterized with on-wafer cryogenic two-port calibration, and an insertion loss of 1 dB is measured across the entire frequency range. Although measurements are performed up to 27 GHz, the simulated upper diplexer band extends to 40 GHz, a record four-octave bandwidth. This device is useful when integrated in large-scale superconducting JJ-based quantum processors, broadband sensors, amplifiers and sources.
Proceedings Title
2022 IEEE/MTT-S International Microwave Symposium - IMS 2022
Conference Dates
June 19-24, 2022
Conference Location
Denver, CO, US


Diplexers, superconducting integrated circuits, superconducting filters, cryogenic on-wafer calibration


Babenko, A. , LASSER, G. , Flowers-Jacobs, N. , Brevik, J. , Fox, A. , Popovic, Z. and Dresselhaus, P. (2022), Cryogenic Decade-Passband Superconducting Integrated Diplexer, 2022 IEEE/MTT-S International Microwave Symposium - IMS 2022, Denver, CO, US, [online],, (Accessed July 13, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created August 29, 2022, Updated December 22, 2023