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Novel Compact Hybrid Rat-Race Couplers with Periodic Transverse Narrow Silts  

Lee Chang On (Division of Electrical and Computer Engineering, Ajou University)
Lee Jin-Taek (Division of Electrical and Computer Engineering, Ajou University)
Kim Sang-Tae (ITEP)
Shin Chull-Chai (Division of Electrical and Computer Engineering, Ajou University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.41, no.12, 2004 , pp. 109-114 More about this Journal
Abstract
In this paper, we introduce the concept of ILCTL(inductively loaded compact transmission line) that is new type of compact transmission line. ILCTL was realized by periodic narrow transverse slits working as series inductances in microstrip line. And compact hybrid rat-race couplers were designed by using the proposed ILCTL. The microstrip line hybrid rat-race coupler with silts of 8 per quarter wavelength at 1.8 GHz has reduced size of 60% as compared with conventional one and it is proved by simulation of EM solver with full-wave analysis based on MoM and measurements.
Keywords
Rat-race coupler; ILCTL(inductively loaded compact transmission line); CLCTL(capacitively loaded compact transmission line); ATL(artificial transmission line);
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