Title :
E-Band CPW Ring Hybrid using an Overlapped Coupling Structure
Author :
Lim, Jong-Sik ; Jeong, Sunyoung ; Lee, Young-Taek ; Kim, Sungwon ; Seo, Kwang-Seok ; Nam, Sangwook
Author_Institution :
School of Electrical Engineering and Computer Science, Seoul National University, Seoul, Rep. Of Korea, Applied Electromagnetics Lab., Institute of New Media and Communications, Seoul National University, San 56-1, Shilim-Dong, Kwanak-Gu, Seoul, 151-742,
Abstract :
A novel E-band coplanar waveguide (CPW) 180° ring hybrid coupler is presented. The proposed ring hybrid adopts a vertically overlapped coupling structure (OCS) having the length of 0.25¿g to replace the conventional 0.75¿g line or previous short-ended coupling section on the same plane. The OCS is realized by placing two metal layers to face them with each other up and down three-dimensionally. The OCS permits the ring hybrid to have a small size and wideband operation due to the broadside coupling. The proposed 180° ring hybrid coupler is fabricated using MMIC technology. The predicted and measured performances show that the operating frequency of the ring hybrid covers E- to W-band (60 ~ 110GHz) with a good agreement preserved.
Keywords :
Computer science; Coplanar waveguides; Coupling circuits; Electromagnetic waveguides; Frequency measurement; Inverters; MMICs; Microstrip; Performance evaluation; Wideband;
Conference_Titel :
Microwave Conference, 2003 33rd European
Conference_Location :
Munich, Germany
Print_ISBN :
1-58053-834-7
DOI :
10.1109/EUMA.2003.340956
