Analysis of surface waves modes in planar connected arrays for radio astronomy

Rene Baelemans, Adrian Sutinjo, Bart Smolders, David Davidson, Ulf Johannsen, Randall Wayth

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

1 Citaat (Scopus)

Samenvatting

A planar array of closely spaced capacitively coupled antennas over a ground plane can be designed to have a broadband and smooth response, making it an interesting candidate for a low-frequency radio-astronomy instrument. However, surface wave modes propagating over the array plane can seriously degrade the response. We will show the derivation of a necessary condition for which surface wave modes will propagate along a planar array of closely spaced capacitively connected antennas. The derivation will be based upon the transverse resonance method [2] applied to the equivalent circuit of a unit cell of an infinite capacitively connected array. From the necessary condition a simple design consideration can be derived which would prevent the excitation of unwanted surface waves on the structure. Finally, we will show how adding resistive loading in the form of the low-noise amplifiers can dampen the unwanted surface wave effects.

Originele taal-2Engels
TitelProceedings of the 2018 20th International Conference on Electromagnetics in Advanced Applications, ICEAA 2018
Plaats van productiePiscataway
UitgeverijInstitute of Electrical and Electronics Engineers
Pagina's446-449
Aantal pagina's4
ISBN van elektronische versie978-1-5386-6762-0
ISBN van geprinte versie978-1-5386-6763-7
DOI's
StatusGepubliceerd - 1 nov 2018
Evenement20th International Conference on Electromagnetics in Advanced Applications, ICEAA 2018 - Cartagena de Indias, Colombia
Duur: 10 sep 201814 sep 2018

Congres

Congres20th International Conference on Electromagnetics in Advanced Applications, ICEAA 2018
LandColombia
StadCartagena de Indias
Periode10/09/1814/09/18

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  • Citeer dit

    Baelemans, R., Sutinjo, A., Smolders, B., Davidson, D., Johannsen, U., & Wayth, R. (2018). Analysis of surface waves modes in planar connected arrays for radio astronomy. In Proceedings of the 2018 20th International Conference on Electromagnetics in Advanced Applications, ICEAA 2018 (blz. 446-449). [8520459] Institute of Electrical and Electronics Engineers. https://doi.org/10.1109/ICEAA.2018.8520459