Title :
A novel low impedance line for MMIC using air-gap stacked structure
Author :
Gi-Hyon Ryu ; Dae-Hyun Kim ; Jae-Hak Lee ; Kwang-Seok Seo
Author_Institution :
Sch. of Electr. Eng. & ISRC, Seoul Nat. Univ., South Korea
Abstract :
A novel low impedance line for MMIC is proposed which uses air-gap stacked microstrip structure and does not require any dielectric process. The proposed transmission line has the width of about 1/3 times that of the conventional microstrip line. It shows lower transmission loss than thin film low impedance transmission line. The proposed transmission line was used to the matching stub of the balanced amplifier MMIC based on the 0.25 /spl mu/m gate GaAs P-HEMT technology, reducing the chip size by 69% compared with the conventional microstrip-based design.
Keywords :
MMIC amplifiers; air gaps; differential amplifiers; impedance matching; microstrip lines; 0.25 micron; GaAs; GaAs P-HEMT technology; MMIC balanced amplifier; air gap stacked microstrip line; low impedance transmission line; matching stub; Air gaps; Dielectric losses; Dielectric substrates; Dielectric thin films; Gallium arsenide; Impedance; MMICs; Microstrip; Power transmission lines; Propagation losses;
Conference_Titel :
Microwave Symposium Digest. 2000 IEEE MTT-S International
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-5687-X
DOI :
10.1109/MWSYM.2000.863259
