C波段相对论行波结构放大器设计  

Design of C-band relativistic traveling wave structure amplifier

作　　者：吴洋[1,2] 李正红[2] 黄华[2] 唐传祥[1] 许州[2] 

机构地区：[1]清华大学工程物理系,北京100084 [2]中国工程物理研究院应用电子学研究所,四川绵阳621900

出　　处：《强激光与粒子束》2010年第3期625-629,共5页High Power Laser and Particle Beams

摘　　要：根据盘荷加载慢波结构的色散关系,设计了C波段高功率行波结构放大器,器件采用轴向微波功率提取降低输出端的反射,并在隔离段中加入微波吸收体切断放大器中自激振荡的正反馈过程,输出腔采用锥形过渡以降低Q值,减少电子注回流,有效抑制了放大器中自激振荡。在2.5维PIC模拟中得到功率890MW、频率5.64 GHz的微波输出,增益35.6 dB,效率32%。A C-band relativistic traveling-wave-structure amplifier is designed from dispersion relation of disk-loaded slowwave structure. In order to avoid self-excitation of the amplifier, some methods are employed in the tube design as follows： coaxial extraction to suppress reflection, sever and absorber to reduce substantially positive feedback, tapering output to reduce retrograde electrons. On the basis of cold cavity characteristic research, quantitative analysis of beam-wave interaction is performed using 2D PIC simulation code. The highest output power, the gain and efficiency is about 890 MW, 35.6 dB and 32% respectively for a 5.64 GHz, 250 kW input.

关 键 词：高功率微波 相对论行波结构放大器 C波段 冷腔特性 PIC粒子模拟 

分 类 号：TN752.5[电子电信—电路与系统]