Experimental Study on Isolation Characteristics Between Adjacent Microstrip Lines Employing Periodically Perforated Ground Metal for Application to Highly Integrated GaAs MMICs

• Published in: IEEE microwave and wireless components letters Vol. 17; no. 10; pp. 703 - 705
• Main Authors: YUN, Young, JUNG, Ji-Won, KIM, Ki-Man, KIM, Hae-Cheon, CHANG, Woo-Jin, JI, Hong-Gu, AHN, Ho-Kyun
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.10.2007; Institute of Electrical and Electronics Engineers
• Subjects: Applied sciences; Bias; Circuit properties; Coupling circuits; Design. Technologies. Operation analysis. Testing; Electric, optical and optoelectronic circuits; Electronics; Equivalent circuits; Exact sciences and technology; Frequency; Frequency ranges; GaAs; Gallium arsenide; Gallium arsenides; Grounds; Integrated circuits; Microstrip; microstrip line; Microstrip lines; Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits; Microwave integrated circuits; Microwaves; MMICs; Monolithic integrated circuits; monolithic microwave integrated circuit (MMIC); Periodic structures; periodically perforated ground metal (PPGM); Resonance; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Microstrip line; Microwave integrated circuits; periodically perforated ground metal (PPGM); Transmission line; Compact design; Monolithic integrated circuit; monolithic microwave integrated circuit (MMIC); GaAs; MMIC
• ISSN: 1531-1309; 1558-1764
• DOI: 10.1109/LMWC.2007.905597

Using a periodically perforated ground metal (PPGM) on GaAs monolithic microwave integrated circuit (MMIC), a microstrip line structure with a high isolation characteristic between lines was developed. The high isolation characteristic was originated from a resonance between adjacent microstrip lines employing PPGM. According to experimental results, a much better isolation characteristic was observed from the adjacent microstrip lines employing PPGM compared with conventional microstrip lines, and the frequency range for high isolation was easily controlled by changing the PPGM structure. Above results indicate that microstrip lines employing PPGM are very useful for application to compact signal/bias lines of highly integrated MMIC requiring a high isolation characteristics between lines.