Browsing by Author "Islam, R"

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Coupled-line metamaterial coupler having co-directional phase but contra-directional power flow
(2004-03-04)
Islam, R
;
Elek, F
;
Eleftheriades, GV
;
電信工程研究所
;
Institute of Communications Engineering
A coupled-line coupler comprising a microstrip line, edge-coupled to a negative-refiractive-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.