Simulating the radiation loss of superconducting submillimeter wave filters and transmission lines using Sonnet em

Akira Endo*, Alejandro Pascual Laguna, Sebastian Hähnle, Kenichi Karatsu, David J. Thoen, Vignesh Murugesan, Jochem J.A. Baselmans

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)
66 Downloads (Pure)

Abstract

Superconducting resonators and transmission lines are fundamental building blocks of integrated circuits for millimeter-submillimeter astronomy. Accurate simulation of radiation loss from the circuit is crucial for the design of these circuits because radiation loss increases with frequency, and can thereby deteriorate the system performance. Here we show a stratification for a 2.5-dimensional method-of-moment simulator Sonnet EM that enables accurate simulations of the radiative resonant behavior of submillimeter-wave coplanar resonators and straight coplanar waveguides (CPWs). The Sonnet simulation agrees well with the measurement of the transmission through a coplanar resonant filter at 374.6 GHz. Our Sonnet stratification utilizes artificial lossy layers below the lossless substrate to absorb the radiation, and we use co-calibrated internal ports for de-embedding. With this type of stratification, Sonnet can be used to model superconducting millimeter-submillimeter wave circuits even when radiation loss is a potential concern.

Original languageEnglish
Number of pages14
JournalJournal of Astronomical Telescopes, Instruments, and Systems
Volume8
Issue number3
DOIs
Publication statusPublished - 2022

Keywords

  • Astronomical Instrumentation
  • Coplanar Waveguide
  • DESHIMA
  • Integrated Superconducting Spectrometer
  • Kinetic Inductance Detectors
  • Millimeter-wave
  • Simulation
  • Submillimeter-wave
  • astronomy

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