Optics – Radio Frequency (RF)
From the experience we have gained in developing the optics for a number of projects (Planck-HFI [1,2], PILOT [3], BINGO , QUBIC) we are continuing to study new optical systems in the radio - submillimetre range for new projects such as LiteBIRD and BISOU.
To do so, we use a number of modelling software packages (GRASP, Zemax, CST) as well as a range of optical/RF measurement equipment. In particular, we use a VNA (Vector Network Analyser) with several extensions to cover the following frequency bands :
- 10 MHz – 43 GHz
- 75 – 500 GHz
Our test facilities, coupled with this VNA, enable us to carry out near-field and far-field measurements.
This research is co-funded by Paris Saclay university (Chaire d’Excellence et OSUPS), région Ile de France (DIM-ACAV) and CNES.
[1] B. Maffei et al, “Planck pre-launch status: HFI beam expectations from the optical optimisation of the focal plane”, Astronomy and Astrophysics, Volume 520, id.A12, 2010.
[2] J.A. Tauber et al, “Planck pre-launch status: The optical system”, Astronomy and Astrophysics, Volume 520, id.A2, 2010.
[3] B. Mot et al, “PILOT optical alignment”, Proceedings of the SPIE, Volume 11180, id. 111806Z 6 pp. (2019)
[4] C. Franceschet et al, “The optical bread-board models of the LiteBIRD Medium and High Frequency Telescope”, Proceedings of the SPIE, Volume 12190, id. 121901W 15 pp. (2022).
[5] A. Chahadih et al, “LiteBIRD MHFT W-band RF Breadboard modeling and characterisation”, Proceedings of the SPIE, Volume 13102 https://doi.org/10.1117/12.3019826 (2024).
Contacts : Bruno Maffei
