GaAs MMIC상에서 주기적 접지구조를 가지는 결합선로의 절연특성에 관한 연구
A Study on Characteristics of Coupled Line Employing Periodical Ground Structure on GaAs MMIC
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In this study, using a periodical ground structure (PGS) on GaAs monolithic microwave integrated circuit (MMIC), transmission line with a high isolation characteristic was developed for application to compact signal/bias lines of highly integrated MMIC. And the origin of the high isolation characteristic was theoretically investigated. The high isolation characteristic was originated from a resonance between adjacent microstrip lines employing PGS. With only a spacing of 20 μm, the coupled microstrip line employing PGS showed an isolation value of -47 dB at 60 GHz. The frequency range for high isolation was easily controlled by changing the PGS structure. Above results indicate that microstrip lines employing PGS are very useful for application to compact signal/bias lines of highly integrated MMIC requiring a high isolation characteristics between lines. In addition, equivalent circuit employing closed-form equation for the coupled line with PGS was also extracted.
Abstract
In this study, using a periodical ground structure (PGS) on GaAs monolithic microwave integrated circuit (MMIC), transmission line with a high isolation characteristic was developed for application to compact signal/bias lines of highly integrated MMIC. And the origin of the high isolation characteristic was theoretically investigated. The high isolation characteristic was originated from a resonance between adjacent microstrip lines employing PGS. With only a spacing of 20 μm, the coupled microstrip line employing PGS showed an isolation value of -47 dB at 60 GHz. The frequency range for high isolation was easily controlled by changing the PGS structure. Above results indicate that microstrip lines employing PGS are very useful for application to compact signal/bias lines of highly integrated MMIC requiring a high isolation characteristics between lines. In addition, equivalent circuit employing closed-form equation for the coupled line with PGS was also extracted.
참고문헌 (5)
- John R. Long, "Passive Componets for Silicon RF and MMIC Design", IEICE Trans. Electron., E86-C(6), pp.1022~1031
- Kazuya Masu, "RF Passive Componets Using Metal Line on Si CMOS", IEICE Trans. Electron., E89-C(6), pp.681~691
- D. M. Pozar, "Microwave Engineering", pp.183~190 (1990), Addison-Wesley
- Y. Yun, "Basic RF characteristics of the microstrip line employing periodically perforated ground metal and its application to highly miniaturized on-chip passive components on GaAs MMIC", IEEE Trans. Microw. Theory Tech., 54(10), pp.3805~3817 (2006)
- B. C. Wadell, "Transmission Line Design Handbook" (1991), Artech House