The pulse forming network (PFN) has the advantages of compactness and long-pulse achievability, and is widely used in military and industrial applications. In this paper, a novel Blumlein-type PFN is investigated numerically and experimentally. Specifically, the device is composed of five Blumlein-type PFN units, which are parallelly connected in the axial direction, and the LC elements of each unit are distributed in the angular direction. Dimensions of the PFN are only Φ 560 × 345 mm² due to the novel compact structure. Small volume is necessary in military and industrial applications, especially for some mobile platforms. Electromagnetic coupling in the structure is theoretically analyzed to improve the performance of the device. Importantly, the impedance of the structure is only 1.5 Ω, which can efficiently reduce insulation difficulty at the same power level. In order to improve the performance of the PFN, a sharpening switch is added in the circuit. Simulation results show that a 170 ns quasi-square pulse is obtained on a 1.5 Ω dummy load, and the jitter of the flap-top is only about 2%. The PFN is built and preliminarily studied in our laboratory. Quasi-square pulses with a peak voltage of 3.1 kV are obtained on a water load of 2.1 Ω. The jitter of the flap-top is ∼3.9%. Experimental results show reasonable agreement with numerical analysis.

中文翻译：

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角分布紧凑型低阻抗布鲁姆林型脉冲形成网络的研究

脉冲形成网络（PFN）具有紧凑性和长脉冲可实现性的优点，已广泛用于军事和工业应用。本文通过数值和实验研究了一种新型的Blumlein型PFN。具体地，该装置由在轴向上平行连接的五个布鲁姆林型PFN单元组成，并且每个单元的LC元件在角度方向上分布。PFN的尺寸仅为Φ560×345 mm ²由于新颖紧凑的结构。在军事和工业应用中，尤其对于某些移动平台，小体积是必需的。从理论上分析了结构中的电磁耦合，以改善设备的性能。重要的是，结构的阻抗仅为1.5Ω，可以在相同功率水平下有效降低绝缘难度。为了提高PFN的性能，在电路中添加了一个锐化开关。仿真结果表明，在1.5Ω的虚拟负载下可获得170 ns的准方波脉冲，并且瓣顶的抖动仅为2％左右。PFN已在我们的实验室中构建并进行了初步研究。在水负载为2.1Ω时获得峰值电压为3.1 kV的准平方脉冲。襟翼的抖动约为3.9％。