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介绍了一种简便实用的矩形波导双工器的工程设计方法。针对在宽频带跨度矩形波导双工器设计过程中,容易出现的低频通道高次模落入高频通道的问题,提出了预加载的解决方法。针对双工器在设计过程中频带跨度大的问题,设计了新型宽频带T形头结构。详细介绍了波导双工器的总体优化方法和步骤。文章的双工器设计实例中心频率分别为21GHz和29.5GHz,带宽均为300MHz,通带内隔离分别小于-120d B和-65d B。
A simple and practical engineering design method of rectangular waveguide duplexer is introduced. In order to solve the problem that the high-order mode of the low-frequency channel falls into the high-frequency channel easily in the process of designing the wideband span rectangular waveguide duplexer, a pre-load solution is proposed. In view of the large span of the duplexer in the design process, a new wideband T-shaped head structure is designed. The paper introduces the overall optimization methods and steps of waveguide duplexer. The design examples of the duplexer center frequencies are 21GHz and 29.5GHz respectively, the bandwidth is 300MHz, the passband isolation are less than -120d B and -65d B respectively.