【摘要】 设计并制作了工作在2.2～2.8GHz的带状线结构3dB定向耦合器和2只通带分别为2.2～2.5GHz及2.5～2.8GHz的8阶微带发夹线结构带通滤波器,利用该耦合器和带通滤波器设计制作连续通带宽带双工器,并通过ADS进行仿真。由仿真结果可知,在2.2～2.8GHz双工器全频带内输入端口的反射系数S11均优于-17.00dB,通带2.2～2.5GHz带内插损S21最优为-2.09dB,通带2.5～2.8GHz带内插损S31为-2.53dB,其中两通带的交接点2.5GHz处插损约-6.5dB。实测结果与仿真结果基本吻合。更多还原

【Abstract】 One strip line structure 3 dB directional coupler operating at 2.2-2.8 GHz and two micro strip eight-orders hairpin-line filters with neighboring pass band were designed and fabricated,and the pass bands of the filter were 2.2-2.5 GHz and 2.5-2.8 GHz,respectively.A continuous band and wideband diplexer was designed and fabricated by the coupler and band pass filters.ADS simulation shows that the return loss S11 of the diplexer is better than-17.00 dB,the insertion loss S21 is-2.09 dB in 2.2-2.5 GHz,and the insertion loss S31 is-2.53 dB in 2.5-2.8 GHz,at the intersection of the two bands,the insertion loss is about-6.5 dB.The test result is almost agreed with the simulation result.更多还原