LiteBIRD MHFT W-band RF breadboard modeling and characterisation

A. Chahadih; C. Franceschet; B. Maffei; M. De Petris; L. Lamagna; J. E. Gudmundsson; M. Bersanelli

doi:10.1117/12.3019826

16 August 2024 LiteBIRD MHFT W-band RF breadboard modeling and characterisation

A. Chahadih, C. Franceschet, B. Maffei, M. De Petris, L. Lamagna, J. E. Gudmundsson, M. Bersanelli

Author Affiliations +

Proceedings Volume 13102, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XII; 131022V (2024) https://doi.org/10.1117/12.3019826
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

As for any CMB instrument, the accurate knowledge of the beam shape is crucial in order to limit the signal contamination and to have a precise CMB power spectrum reconstruction from the data. The MHFT on the future JAXA-led LiteBIRD space mission, based on a refractive design, will have a wide frequency coverage ranging from 89 to 448 GHz. In order to validate the modeling tools and the level of accuracy achievable on the experimental RF characterisation prior to any complete prototype, a simpler breadboard has been developed for W-Band (75-110 GHz). We present here both the modeling and the RF characterisation results of this breadboard which consists of a dielectric lens that is fed by a corrugated horn. The measurements were performed in the Near-Field, the Far-Field being then obtained through a transformation.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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A. Chahadih, C. Franceschet, B. Maffei, M. De Petris, L. Lamagna, J. E. Gudmundsson, and M. Bersanelli "LiteBIRD MHFT W-band RF breadboard modeling and characterisation", Proc. SPIE 13102, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XII, 131022V (16 August 2024); https://doi.org/10.1117/12.3019826

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