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Photoconductive Terahertz antenna with radial symmetry

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3 Author(s)
Deibel, J.A. ; Dept. of Electr. & Comput. Eng., Rice Univ., Houston, TX, USA ; Escarra, M.D. ; Mittleman, D.M.

It has been demonstrated recently that it is possible to guide broadband Terahertz pulses utilising a novel coaxial waveguide. This technique is hindered by the difficulty in exciting the radially polarised fundamental mode of the waveguide. To optimise mode matching, a novel radially symmetric photoconductive Terahertz antenna is proposed. Using finite element method simulations and analytical calculations, it is shown that this antenna can generate the desired radial polarisation.

Published in:

Electronics Letters  (Volume:41 ,  Issue: 5 )