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A balanced composite backward and forward compact waveguide based on resonant metamaterials

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4 Author(s)
Tang, Qi ; Department of Microwave Engineering, Harbin Institute of Technology, Harbin 150001, China ; Fan-Yi Meng ; Qun Wu ; Jong-Chul Lee

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A balanced composite backward and forward waveguide is presented by using modified split ring resonators. The forbidden band between the forward and backward guided mode is eliminated. Acoaxial feed method is proposed to excite both the forward and backward guided modes. The passband of the proposed structure ranges from 4.28GHz to 6.83GHz, below the cutoff frequency of the fundamental mode of the hollow waveguide (∼15 GHz). Physical size of the waveguide has been dramatically decreased.

Published in:

Journal of Applied Physics  (Volume:109 ,  Issue: 7 )