一种紧凑型Ku频段正交模耦合器的设计

Design of orthomode transducer in Ku-band with compact size

设计了一种结构极为紧凑的Ku频段正交模耦合器(orthomode transducer,OMT),器件最大尺寸36mm,公共端口为方波导,适用于复杂的多馈电网络集成系统.通过一系列阶梯变换以及侧壁缝隙耦合形式实现了电磁波的极化过滤,两个输出端口分别对应一种极化波.加工了耦合器实物并进行了测试,实测15%频带范围内端口驻波小于1.6,两端口隔离度小于-50dB,仿真和实测数据一致.

A very compact orthomode transducer design in Ku-band is established complex multi-feed network integration system, the common port is square waveguid , which is suited for e and the maximum size is 36 mm. The polarization filtering of electromagnetic wave is realized through a series of ladder transformation and side wall gap coupling. The two output ports correspond to one kind of polarization wave respectively. The coupler is processed and tested. The measured port standing wave in the 15% band range is less than 1.6, the isolation degree of the two ports is less than -50 dB, and the measured result is agree with the simulation result.