A novel input coupler that can operate in two different frequency bands separately is proposed in this paper. The dual-band (X/Ku) signals are input by two rectangular waveguides, respectively, in particular, a Bragg reflector is inserted in one of the rectangular waveguides to avoid the electromagnetic backflow, and then the circular TE₀₁/TE₀₂ modes are excited in the cylindrical cavity by field diffraction through the coupling holes with the help of a coaxial cavity. The simulation results show that dual-band input couplers for both dual-band gyroklystron and gyrotron traveling wave tube obtain excellent performance, laying the foundation for the development of the dual-band gyro-amplifier.

中文翻译：

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用于陀螺速调管和陀螺仪TWT的新型双频输入耦合器

本文提出了一种新颖的输入耦合器，它可以分别在两个不同的频段工作。双频带（X / Ku）信号分别由两个矩形波导输入，尤其是在其中一个矩形波导中插入一个布拉格反射器以避免电磁回流，然后采用圆形TE ₀₁ / TE ₀₂模式。在同轴腔的帮助下，通过耦合孔通过场衍射在圆柱腔中激发。仿真结果表明，双频回旋速调管和回旋行波管的双频输入耦合器均具有优异的性能，为双频回旋放大器的发展奠定了基础。