Broadband THz filters for THz sensing devices

Author

Sanphuang, Varittha ; Nahar, Niru K. ; Volakis, J.L.

Author_Institution

Electr. & Comput. Eng. Dept., Ohio State Univ., Columbus, OH, USA

fYear

2012

fDate

25-27 July 2012

Firstpage

18

Lastpage

19

Abstract

We propose a broadband filter using multi-layered frequency selective surfaces (FSS) for terahertz (THz) sensing devices. These types of filter windows are required to be placed in front of THz sensors to increase signal-to-noise ratio and reduce sensor sensitivity to mid IR and visible light. The FSS filter is simulated using polyethylene dielectric layers with fan shaped metal slots. Simulations show excellent flat band-pass response and a sharp out-of-band frequency response in 1-3 THz frequency range, centered at 1.95 THz. The -3 dB bandwidth achieved from this design is 1 THz (1.5THz-2.5THz).

Keywords

frequency selective surfaces; submillimetre wave filters; terahertz wave detectors; THz sensing devices; bandwidth 1 THz; broadband THz filters; flat band-pass response; frequency 1 THz to 3 THz; multilayered FSS filter; multilayered frequency selective surfaces; polyethylene dielectric layers; sensor sensitivity reduction; shaped metal slots; sharp out-of-band frequency response; signal-to-noise ratio; terahertz sensing devices; Frequency Selective Surface (FSS); Sensor; Terahertz (THz); filter; metamaterials; multi-layer;

fLanguage

English

Publisher

ieee

Conference_Titel

Aerospace and Electronics Conference (NAECON), 2012 IEEE National

Conference_Location

Dayton, OH

ISSN

0547-3578

Print_ISBN

978-1-4673-2791-6

Type

conf

DOI

10.1109/NAECON.2012.6531017

Filename

6531017