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International Journal of Antennas and Propagation
Volume 2013 (2013), Article ID 417108, 8 pages
http://dx.doi.org/10.1155/2013/417108
Research Article

A Multichannel THz Detector Using Integrated Bow-Tie Antennas

1Beijing University of Posts and Telecommunications, Beijing 100876, China
2MMT Group, RAL Space, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, UK

Received 7 November 2012; Accepted 10 April 2013

Academic Editor: Wenhua Chen

Copyright © 2013 Hairui Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper presents a kind of a multichannel THz detector using lens-based bow-tie array. A hyperhemispherical silicon lens is employed to provide a focal plane; 8 bow-tie elements are arranged on the focal plane with careful design to show a performance of broadband, high gain, well compact, and easy assembling. These characteristics of the detector are preferred for detecting weak THz signal. Measured far field shows that the radiation pattern of each element is shifted angularly, by 9°, which can be used for THz imaging. Tested responsivity of the detector shows a good spectral performance from 260 to 400 GHz: respective values were ≥220 V/W, and the best NEP is achieved at about 60 pW/ . Besides that, the proposed antenna has advantages of simple structure, easy fabrication, and low cost.