This paper presents a coaxial-to-microstrip transition with improved transmission characteristics for use in 5G millimeter wave communication band. When a coaxial cable and a microstrip line are connected, a discontinuous portion exists at the connection, and the reflection, transmission, and radiation of the incident electromagnetic waves occur due to the discontinuity. To prevent degradation of the transition characteristics due to the discontinuity, metal legs in the coaxial cable are introduced. The proposed coaxial-to-microstrip transition has a higher transmission coefficient than conventional coaxial-to-microstrip transitions.
ACKNOWLEDGMENT This work was supported in part by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2018R1D1A1A02086071) and in part by \u201cHuman Resources Program in Energy Technology\u201d of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), granted financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea (Project No. 20184030202220).
