TY - JOUR
T1 - Optimization of a quasi-mesh absorber for the terahertz intensity mapper
AU - Nie, Rong
AU - Janssen, Reinier M.J.
AU - Bradford, Charles M.
AU - Filippini, Jeffrey P.
AU - Hailey-Dunsheath, Steven
N1 - Manuscript received June 1, 2020; revised August 11, 2020; accepted August 24, 2020. Date of publication September 4, 2020; date of current version November 3, 2020. This work was carried out as part of the Terahertz Intensity Mapper project, supported by NASA under Grant 80NSSC19K1242, issued through the Science Mission Directorate. The work of Reinier M. J. Janssen was supported by an appointment to the NASA Postdoctoral Program at the NASA Jet Propulsion Laboratory, administered by Universities Space Research Association under contract with NASA. This research was carried out in-part at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (80NM0018D0004). (Corresponding author: Rong Nie.) Rong Nie and Jeffrey P. Filippini are with the Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL 61801 USA (e-mail: [email protected]; [email protected]).
PY - 2020/11
Y1 - 2020/11
N2 - We discuss the design and optimization of the absorber for the long-wavelength arm of the Terahertz intensity mapper, a balloon-borne spectrometer employing kinetic inductance detectors. Electromagnetic simulations of our design indicate in-band absorption efficiency over ∼! 80% in both linear polarization modes. By developing custom transmission line model and mode-matching calculations, we find the absorption efficiency is affected by the absorber's reactive part and overall shape. These insights into the operation of this design provide guidance for its optimization for low-resistance absorber materials.
AB - We discuss the design and optimization of the absorber for the long-wavelength arm of the Terahertz intensity mapper, a balloon-borne spectrometer employing kinetic inductance detectors. Electromagnetic simulations of our design indicate in-band absorption efficiency over ∼! 80% in both linear polarization modes. By developing custom transmission line model and mode-matching calculations, we find the absorption efficiency is affected by the absorber's reactive part and overall shape. These insights into the operation of this design provide guidance for its optimization for low-resistance absorber materials.
KW - Electromagnetic simulations
KW - Terahertz intensity mapper (TIM)
KW - kinetic inductance detector (KID)
KW - mode matching (MM) method
KW - transmission line theory
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U2 - 10.1109/TTHZ.2020.3022020
DO - 10.1109/TTHZ.2020.3022020
M3 - Article
AN - SCOPUS:85095973513
SN - 2156-342X
VL - 10
SP - 704
EP - 712
JO - IEEE Transactions on Terahertz Science and Technology
JF - IEEE Transactions on Terahertz Science and Technology
IS - 6
M1 - 9186733
ER -