Coupled-line metamaterial coupler having co-directional phase but contra-directional power flow
Authors:
- 4 March 2004
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 40 (5) , 315-317
Abstract
A coupled-line coupler comprising a microstrip line, edge-coupled to a negative-refractive-index line, exhibits co-directional phase but contra-directional Poynting vectors on the lines, leading to backward coupling. A key feature of this coupler is that it can support complex coupled modes. The resulting exponential field decay enables enhanced coupling with moderate line lengths and spacing. An example 3 dB device has been implemented and tested at 3 GHz.Keywords
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