Electromagnetic Design of Calibration Targets for MetOp-SG Microwave Instruments

Schroder, Arne; Murk, Axel; Wylde, Richard; Jacob, Karl; Pike, Kevin; Winser, Mike; Pujades, Marc Bergada; Kangas, Ville (2017). Electromagnetic Design of Calibration Targets for MetOp-SG Microwave Instruments. IEEE transactions on terahertz science and technology, 7(6), pp. 677-685. Institute of Electrical and Electronics Engineers IEEE 10.1109/TTHZ.2017.2757442

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We describe the electromagnetic development of microwave calibration units for the second generation of meteorological operational satellites. In particular, we focus on the electromagnetic and thermal design of on-board calibration targets (OBCT) for the microwave sounder (MWS) and the ice cloud imager (ICI), respectively. The OBCTs act as temperature reference for calibration. Therefore, they are required to exhibit a low electromagnetic reflectivity and a uniform temperature. This paper discusses the numerical design of pyramid absorbers for MWS and ICI. Based on theoretical studies, we have developed a novel pyramid design, which exhibits superior electromagnetic and thermal properties compared with conventionally used layouts. A comprehensive numerical study on the impact of common types of manufacturing tolerances has been carried out, and the most critical types were identified. This work presents remedies that reduce the susceptibility to manufacturing tolerances. All numerical results have been verified experimentally, and the manufactured OBCT prototypes have been shown to fulfill the specific requirements in all frequency bands.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Applied Physics

UniBE Contributor:

Murk, Axel

Subjects:

600 Technology > 620 Engineering
500 Science > 530 Physics

ISSN:

2156-342X

Publisher:

Institute of Electrical and Electronics Engineers IEEE

Language:

English

Submitter:

Franziska Stämpfli

Date Deposited:

15 Jun 2018 09:12

Last Modified:

15 Jun 2018 09:12

Publisher DOI:

10.1109/TTHZ.2017.2757442

BORIS DOI:

10.7892/boris.114731

URI:

https://boris.unibe.ch/id/eprint/114731

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