A Basic Study on RF Characteristics of Meander Line Employing Periodic Ground Structure on GaAs MMIC for Application to Miniaturization of RF Components

[摘要] The meander line employing periodic ground structure (MLEPGS) was fabricated on GaAs substrate for application to miniaturization of RF components on MMIC, and its RF characteristics were thoroughly investigated. The MLEPGS with a length ofλ/8 showed loss less than 0.72 dB up to 20 GHz, which was low enough for application to RF passive components. The MLEPGS showed much higher propagation constantβand effective permittivityεeffthan conventional meander line. Concretely, the MLEPGS withTof 20 μm showedβof 1.08~20.85 rad/mm andεeffof 2703~2479 from 1 to 20 GHz, while the conventional meander line showedβof 0.18~3.36 rad/mm andεeffof 74.2~64.7 in the same frequency range. According to the result, the size of theλ/4 transmission line employing the MLEPGS was 0.151 mm2, which was 3.5% of the size of the transmission line employing conventional meander line.

[学科分类] 电子、光学、磁材料