Sub-Wavelength Frequency Selective Surface Design for Improved Antenna Array Out-of-Band Rejection

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Sub-Wavelength Frequency Selective Surface Design for Improved Antenna Array Out-of-Band Rejection

Conference Paper (2016)

Author(s)

C. Yepes Julia (TU Delft - Electrical Engineering, Mathematics and Computer Science)

D. Cavallo (TU Delft - Electrical Engineering, Mathematics and Computer Science)

A. Neto (TU Delft - Electrical Engineering, Mathematics and Computer Science)

E. Gandini (TNO)

S Monni (TNO)

F.E. van Vliet (TNO)

Research Group

Tera-Hertz Sensing

Phased array antenna Bandpass filters Frequency selective surfaces (FSSs)

DOI related publication

https://doi.org/10.1109/ARRAY.2016.7832565 Final published version

To reference this document use

https://resolver.tudelft.nl/uuid:683a9b51-646e-483f-b577-508613412736

More Info

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Publication Year

2016

Language

English

Research Group

Tera-Hertz Sensing

Pages (from-to)

1-5

ISBN (electronic)

978-1-5090-1447-7

Event

2016 IEEE International Symposium on Phased Array Systems and Technology, PAST 2016 (2016-10-18 - 2016-10-21), Waltham, MA, United States

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187

Abstract

In this work, the problem of enhancing the frequency selectivity property of an antenna array has been studied. A solution based on a multi-layer frequency selective surface (FSS), composed of sub wavelength elements is proposed. An equivalent circuit model is used for the design, under the assumption that the inter-layer interaction is dominated by a single Floquet mode. This approximation remains valid by keeping the unit-cell size comparable to the inter-layer distance. Results for generic oblique incidence are presented. Fast roll-off is achieved by using a 3 pole Chebyshev filter design. Moreover, the FSS is used in combination with a connected slot array antenna. The resulting structure allows to scan up to 45° in both principal planes with a relative bandwidth (S11<; -10 dB) of 15% around the central frequency f0 = 4.8 GHz. Higher order harmonics are rejected up to 18 GHz.