Design and Characterization of the ALMA Band 5 Vacuum Window

Schröder, Arne; Murk, Axel; Yagoubov, Pavel; Patt, Ferdinand (2016). Design and Characterization of the ALMA Band 5 Vacuum Window. IEEE transactions on terahertz science and technology, 6(1), pp. 156-162. Institute of Electrical and Electronics Engineers IEEE 10.1109/TTHZ.2015.2497139

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This paper summarizes the electromagnetic design process of the vacuum window for the Atacama Large Millimeter/sub-millimeter Array (ALMA) Band 5 (163-211 GHz). We have carried out investigations by means of numerical simulations as well as reflection and transmission measurements. Simulations were performed using the finite element method, an efficient quasi-analytical technique, and rigorous coupled-wave analysis. We used an injection-molded vacuum window prototype as a starting point of the design process and investigated deterioration in the electromagnetic performance caused by different types of manufacturing artifacts. Following these analyses, an optimization of the window has been performed based on simulations. We measured the reflectivity and transmittance of the newly designed window and this paper demonstrates that the optimized window exhibits a return loss better than -20 dB, as required by the ALMA specifications.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Applied Physics
08 Faculty of Science > Institute of Applied Physics > Microwaves

UniBE Contributor:

Schröder, Arne and Murk, Axel

Subjects:

600 Technology > 620 Engineering
500 Science
500 Science > 530 Physics

ISSN:

2156-342X

Publisher:

Institute of Electrical and Electronics Engineers IEEE

Language:

English

Submitter:

Simone Corry

Date Deposited:

13 Jul 2017 08:51

Last Modified:

13 Jul 2017 08:51

Publisher DOI:

10.1109/TTHZ.2015.2497139

BORIS DOI:

10.7892/boris.96949

URI:

https://boris.unibe.ch/id/eprint/96949

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