滤波器设计实例（电子科技大学）滤波器设计 贾宝富 1 设计实例-3 波导滤波器设计举例 2 波导滤波器设计举例 波导滤波器设计举例 设计参数： f0 = 15.35 GHz BW= 32 MHz S11 滤波器从 14.9到 15.35 GHz连续可调 BJ-140波导技术参数： a=15.8mm; b=7.9mm; 工作频率范围： 11.9~18GHz 3 Filter Filter with with inductive inductive posts posts 设计参数： BJ-140 f0 = 15.35 GHz BW= 32 MHz S11 滤波器从 14.9到 15.35 GHz连续可调 Z0 K01 K12 K23 K34 K23 K12 K01 4 step step 1: 1: Prototype Prototype filter filter f0 BW IL RL 1a) Obtain low-pass prototype parameters (gi) from filter specifications (see e.g. Matthaei*) g2 g0 g1 g3 g4 gn-1 gn gn+1 6th order Chebychev filter prototype elements g0 = 1.0000 g1 = 0.8836 g2 = 1.3966 g3 = 1.7894 g4 = 1.5528 g5 = 1.6095 g6 = 0.7667 g7 = 1.1524 Example: f0 = 15.35 GHz BW= 32 MHz S11