Spatial Filtering Frequency Selective Surface for Wide-Angle Scanning Phased Arrays

Conference paper (2017)

Authors

C. Yepes Julia Tera-Hertz Sensing -

D. Cavallo Tera-Hertz Sensing -

A. Neto Tera-Hertz Sensing -

E. Gandini TNO

S. Monni TNO

F.E. van Vliet TNO

Research Group

Tera-Hertz Sensing () (TU Delft)

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Published Date

2017

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Tera-Hertz Sensing

Abstract

We present the design of a frequency selective surface (FSS) with large harmonic rejection bandwidth. The FSS comprises five metal layers, each consisting of a periodic array of subwavelength elements. The design is based on an equivalent transmission line model that includes only the fundamental Floquet mode. This model is valid under the condition that the unit cell size is smaller than the distance between layers. The multi-layer FSS has an overall height of one sixth of the free-space wavelength at the central frequency of operation. The simulated frequency response exhibits good stability over a wide conical incidence range, up to 45 degrees. A prototype of the designed FSS is fabricated and combined with a wide-scanning connected array of dipoles to implement an antenna element for phased array applications, with integrated filtering properties.

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