Title :
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
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;
Conference_Titel :
Aerospace and Electronics Conference (NAECON), 2012 IEEE National
Conference_Location :
Dayton, OH
Print_ISBN :
978-1-4673-2791-6
DOI :
10.1109/NAECON.2012.6531017
