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机译:Design of Planar Directional Coupler using 2-Bit Fragment Structures
Jinling Inst Technol, Dept Elect & Informat Engn, Nanjing 211169, Peoples R China;
Univ Sci & Technol China, Dept Elect Engn & Informat Sci, Hefei 230027, Peoples R China;
Mid Sweden Univ, Dept Elect Design, SE-85170 Sundsvall, Sweden;
directional coupler; fragment-type; directivity; modeling; optimization;