Superconducting 4-20 GHz Wideband Lumped-Element Based Hybrid for Radio Astronomy Receivers

Paper in proceeding, 2025

The next generation of superconducting sideband-separating radio astronomy receivers requires wide instantaneous bandwidth, high performance, and compact components. To accurately design these components with measured performance following that of the simulated performance, accurate models of these superconducting structures are required.
In this work, we present a comparison between the simulation and measurement results of several superconducting lumped element structures intended for use in the intermediate frequency circuits in sideband-separating receivers. These structures were simulated in Keysight ADS Momentum and fabricated on 10 mil Alumina with superconducting Niobium metallization. Measurements were performed in a cryogenic probe station at 4.2 K.