| Title | Highly Miniaturized RF Components Employing Metamaterial Structure on MMIC |
| Author | Han-Nah Joh, *Young-Bae Park, Se-Ho Kim, Young Yun (Korea Maritime University, Republic of Korea) |
| Page | pp. 881 - 884 |
| Keyword | RF passive components, metamaterial, MMIC |
| Abstract | In this study, we introduce highly miniaturized on-chip impedance transformer and Wilkinson power divider, which were fabricated using metamaterial structure on MMIC. Concretely, a microstrip line employing metamaterial was used for a fabrication of the RF passive components. The size of the impedance transformer and power divider were reduced to 2.3 and 6 % of the conventional one, respectively. |
| Title | Miniaturized Active Balun MMIC Employing Active Device |
| Author | *Young-Bae Park, Se-Ho Kim, Han-Nah Joh, Young Yun (Korea Maritime University, Republic of Korea), Kyu-Ho Park, Kwang-Ho Ahn (Korea Electronics Technology Institute, Republic of Korea) |
| Page | pp. 885 - 888 |
| Keyword | active balun, MMIC, power coupling, InGaP/GaAs HBT |
| Abstract | In this paper, miniaturized active baluns employing active device were proposed. The miniaturized active baluns were fabricated employing InGaP/GaAs HBT (heterojunction bipolar transistor) on GaAs substrate for MMIC applications, and especially a composite structure employing common-emitter (CE) and common-collector (CC) circuits was used for 90° power coupling. The size of the active balun for power coupling was about 1.9 % of conventional passive branch-line coupler. The active baluns for power coupling showed good RF performances comparable to passive branch-line couplers. |
| Title | Miniaturized RF Components Employing π-type Multiple Coupled Microstrip Line Structure |
| Author | Se-Ho Kim, *Young-Bae Park, Han-Nah Joh, Young Yun (Department of Radio Communication Engineering, Korea Maritime University, Republic of Korea), Kyu-Ho Park, Kwang-Ho Ahn (Korea Electronics Technology Institute, Republic of Korea) |
| Page | pp. 889 - 892 |
| Keyword | Wilkinson power divider, PPGM, MMIC |
| Abstract | In this work, using a π-type multiple coupled microstrip line structure (MCMLS), we fabricated highly miniaturized Wilkinson power divider and branch-line coupler. The line length of the Wilkinson power divider and branch-line coupler were reduced to about λ/44 and λ/38, respectively, and their size were 11.2 % and 14.6 % of conventional ones, respectively. The miniaturized Wilkinson power divider and branch-line coupler showed good RF performances in C band. |
| Title | Common-Mode Current of a PCB to Cable and Its Suppression of the Radiated Emission by Decoupling Capacitor |
| Author | Ki-bum Jung, *Min-Seok Han (Hanyang University, Republic of Korea), Yeon-choon Chung (Seokyeong University, Republic of Korea), Jaehoon Choi (Hanyang University, Republic of Korea) |
| Page | pp. 893 - 896 |
| Keyword | PCB, EMI , Common-Mode Current, Signal Integrity |
| Abstract | Decoupling capacitors on packages and printed circuit boards are often essential to reduce voltage fluctuation and maintain power and signal integrity. This paper presents the effect of decoupling capacitor on signal integrity and radiated emission about critical trace change by reference plane. It was observed that the decoupling capacitor is not to enhance signal integrity but to reduce the unnecessary radiation. |