中国物理B ›› 2015, Vol. 24 ›› Issue (7): 79402-079402.doi: 10.1088/1674-1056/24/7/079402
• GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS • 上一篇
张开春a b, 漆中阔a b, 杨召龙a b
Zhang Kai-Chun (张开春)a b, Qi Zhong-Kuo (漆中阔)a b, Yang Zhao-Long (杨召龙)a b
摘要: A backward wave amplifier (BWA) in a terahertz regime with a novel slow-wave structure (SWS) composed of multi parallel grating pins inside a rectangular waveguide is analyzed. The multi-pin rectangular waveguide SWS possesses good performance and is compatible with micro-fabrication technologies. The dispersion and interaction impedance of the multi-pin SWS are presented. The stopbands of the modes cling together in a Brillouim zone. The SWS has a high interaction impedance that is suitable for the interaction of multi cylindrical beams. The design, which is based on three parallel pins supporting the wave–beam interaction with four cylindrical beams, is verified by three-dimensional particle-in-cell simulations. A BWA with the central frequency at 340 GHz is demonstrated, and the output power is more than 100 mW. A tuning frequency range of 15 GHz (333–348 GHz) is obtained with a gain of more than 20 dB.
中图分类号: (Wave/wave, wave/particle interactions)