微型化平衡式放大器的设计与制作( : ) : 100 Tel:0952540040 FAX: 24528895 E-mail:d8960136@knight.fcu.edu.tw [1] design system) : [2] 90 2.4GHz 40% FR4 2.4GHz sonnet ADS(advanced 1. 50 1. 2. 3. ( ) 1 6dB DC 90° 90° S11 6dB/oct 1 90° 90 [3] 3dB 60% 2. I. 65% II. 3. 3.1 2(a) 2001 [4] MMIC (a) (b) 3-2 (a) [5] (L=1/4λ) (b) (0 rat-race hybrids for uniplanar MMICs”[6] applications “[8] 2(b) [6] - ” Finite-ground coplanar-waveguide branch-line couplers”[7] 60% ”A new class of miniature Quadrature couplers for MIC and MMIC 65% 35% 5.2 1/4λ 3(b) θ1+θ2 (a) (b) (c) 3 ……