共查询到15条相似文献,搜索用时 234 毫秒
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本文开展了一种用于通信系统的4.6%带宽的S 波段连续波宽带速调管KS4158 的研制工作,重点研究了该速调管的宽带输出电路,详细介绍了宽带输出电路的两种设计方案:滤波器加载重叠模双间隙耦合腔宽带输出电路和三节滤波器加载宽带输出电路。文中还介绍了基于矢量网络分析仪的宽带输出电路的扫频测量法,给出了这两种宽带输出电路的测试结果。最后,给出了分别采用上述两种宽带输出电路方案的两只速调管的测试结果,并对这两种方案进行了分析和比较,其中采用三节滤波器加载宽带输出电路方案的样管的连续波输出功率大于17kW,瞬时带宽大于4.6%。 相似文献
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L波段多注速调管同轴线滤波器宽带输出回路的研究和设计 总被引:4,自引:2,他引:2
该文设计了一个相对工作带宽超过14%、可用于L波段多注速调管的宽带输出回路四耦合槽模强耦合双间隙腔加载同轴线滤波器,并对其进行详细地分析和计算。研究结果表明,在较低频率波段宽带速调管中,采用同轴线滤波器的宽带输出回路是完全可行的,并且具有更大的输出带宽潜力和较小的体积,特别有利于整管的小型化。 相似文献
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本文根据微波网络理论,建立了双间隙双耦合口输出回路间隙阻抗频率特性的冷测模拟计算方法。运用该方法,计算分析了某S波段双间隙双耦合口输出腔的间隙阻抗频率特性。结果显示,本方法与采用场分析法得到的结果符合良好。 相似文献
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扩展相互作用速调管(EIK)由多个重入式多间隙耦合腔构成,毫米波段高功率微波源的需求推动了Ka波段EIK的研制.分别利用等效电路理论和场分析方法推导了由三个同样间隙构成的三间隙耦合输出腔间隙阻抗实部的计算公式,然后应用等效电路方法获得了滤波器加载宽频带输出回路的基本参数,应用场分析方法设计了冷测带宽达4.6%的滤波器加载三间隙耦合输出腔结构,为宽频带EIK的研制打下坚实的基础. 相似文献
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本文提出了矩形π-TM310 双间隙腔加载同轴滤波器型宽带输出电路,并对其可行性进行了论证,对高次模双间隙腔中非工作模式的干扰程度和同轴线输出电路的功率容限等重要问题做了定量分析。我们通过调整矩形双间隙腔的长宽比例并采用凹入结构,明显扩大了π-TM310模与相邻非工作模的频率间隔,有效抑制了非工作模式的干扰;又采用了非常规的电子注孔布局,使各个电子注孔的特性阻抗更均匀,而且在加载同轴滤波器之后仍然很均匀。研究结果表明,经过优化设计的矩形π-TM310 双间隙腔加载同轴滤波器型输出电路具有很宽的输出频带,在X波段相对带宽达到14%左右。但由于π模双间隙腔与同轴线的耦合口较小,而且该处还有短路销钉,导致其输出功率容限较低,约为几百kW。因此,该类输出电路比较适合于X波段或更高频段的中功率宽带多注速调管。 相似文献
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Time domain processing of broadband signals using an array of sensors is normally carried out by a transversal filter, and the filter coefficients are adjusted by solving a constrained beamforming problem that requires manipulation of matrices of dimension LJ×LJ with L denoting the number of sensors in the array and J denoting the filter length. This paper studies a frequency domain method to compute the coefficients of transversal filter, compares its performance, sensitivity to the look direction, and computational efficiency with that of the direct method, and shows how the computational saving increases using the frequency domain method as the number of elements and the filter length are increased. The paper presents a number of techniques that exploit the inherent structure present in the frequency domain method to reduce the computation load and shows that the real-time computational saving of the order of 12520 folds is possible for an array of 100 elements using a tap delay line filter of 100 taps. The paper demonstrates that a beamformer using this method is able to produce more output SNR with less computation time than the one using the normal time domain method 相似文献
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该文提出了一种适合于低频段中等功率的宽带速调管的新型3-节滤波器型输出电路-π-模双间隙腔加载同轴-矩形波导输出电路,并对输出电路的性能以及各部分结构对输出腔间隙阻抗的影响规律进行详细研究.研究结果表明,同轴-矩形波导混合型输出电路不仅克服了低频段宽带速调管中输出波导尺寸太大而影响聚焦系统的困难,有利于提高电子注通过率和整管效率,同时还具有很好的输出带宽潜力和良好的高功率承受能力. 相似文献
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Procedures have been developed which enable the accurate computation of the cold-test (absence of an electron beam) parameters and RF output power for the slow-wave circuits of coupled-cavity traveling-wave tubes (TWT's). The cold-test parameters, which consist of RF phase shift per cavity, impedance, and attenuation, are computed with the three-dimensional electromagnetic simulation code MAFIA and compared to experimental data for an existing V-band (59-64 GHz) coupled-cavity TWT. When simulated in cylindrical coordinates, the absolute average differences from experiment are only 0.3% for phase shift and 2.4% for impedance. Using the cold-test parameters calculated with MAFIA as input, the NASA Coupled-Cavity TWT Code is used to simulate the saturated RF output power of the TWT across the V-band frequency range. Taking into account the output window and coupler loss, the agreement with experiment is very good from 60-64 GHz, with the average absolute percentage difference between simulated and measured power only 3.8%. This demonstrates that the saturated RF output power of a coupled cavity TWT can be accurately simulated using cold-test parameters determined with a three dimensional electromagnetic simulation code 相似文献
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The paper mainly presents the design of beam-wave interaction of a C-band high-peak- power high-efficiency broadband klystron. The beam-wave interaction section is designed based on considerations of efficiency and bandwidth synthetically. As a part of beam-wave interaction section, buncher section is simulated by Particle-In-Cell (PIC) code to observe the bunching process of electron beam to achieve high conversion efficiency of electron beam and RF field. When it comes to the other part, output circuit is designed as a three-section filter by an output cavity loaded with Chebyshev filter and the cold test results are given. The beam-wave interaction is simulated by EGUN code and Ar- senal-MSU code respectively. The simulated results indicated that, the existence of power dips in the operating bandwidth is verified by Arsenal-MSU code, comparing proper results by EGUN code. Then, the method that design parameters are not adjusted except parameters of buncher cavities to remove potential power dips is described. What is more, the simulated results of electron optics system are given by EGUN code and Arsenal-MSU code respectively. The further hot test results of klystron prove that the whole design of beam-wave interaction is effective. 相似文献