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Backward coupling waveguide coupler using left-handed material

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6 Author(s)
Yu Yuan ; Electromagnetics Academy, Zhejiang University, Hangzhou 310027, People’s Republic of China and Department of Information and Electronic Electromagnetics, Zhejiang University, Hangzhou 310027, People’s Republic of China ; Ran, Lixin ; Chen, Hongsheng ; Huangfu, Jiangtao
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An X-band microwave waveguide coupler partially filled with a left-handed material is realized and measured. The electromagnetic wave propagates in the primary branch of the coupler which is filled with the left-handed material and is backward edge coupled into the secondary waveguide, filled with a right-handed material. Near the interface between the left-handed and the right-handed materials, the Poynting vectors have opposite directions, which yields a backward coupling. Such coupler is designed, fabricated, and the backward coupling effect is indeed measured.

Published in:

Applied Physics Letters  (Volume:88 ,  Issue: 21 )