Nonlinear transmission lines (NLTLs) are a class of pulse forming networks (PFNs) for modulation of pulsed power to generate radio frequency (RF) signals. Primarily, NLTL designs assume a two-port configuration, which requires ones-to-tens of nanosecond input pulse rise time for each modulated pulse out. In this article, a closed-loop or single-port pulser that yields continuous pulses based on prior pulse stimulation is presented. The pulser is comprised of an NLTL, a power amplifier (PA), and a solid-state HV pulse generator. The capability advantage of the closedloop system is its stability and center frequency tunability. Pragmatically, the solid-state-based design of this system enhances its probability of fielded use due to volume and mass savings compared to the prior art. The validity of the proposed design is empirically shown by a 16-section NLTL coupled with a solid-state laterally diffused metal–oxide–semiconductor (LDMOS)-based PA and a custom HV pulse generator. The closed-loop configuration constructed from these components demonstrated a peak power of 2.1 kW into 50 $\Omega $ at 90 MHz. This is the first report of a solid-state switch-based closed-loop NLTL configuration capable of producing a continuous pulse stream. Furthermore, we propose a dual-diode-based NLTL design, which can operate and output at higher center frequencies compared to its single-diode counterpart.

中文翻译：

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在开环和闭环配置中使用非线性传输线和功率放大器的中等功率、自维持和可配置射频脉冲生成电路

非线性传输线 (NLTL) 是一类脉冲形成网络 (PFN)，用于调制脉冲功率以生成射频 (RF) 信号。NLTL 设计主要采用双端口配置，每个调制脉冲输出需要 1 到 10 纳秒的输入脉冲上升时间。在本文中，介绍了一种基于先前脉冲刺激产生连续脉冲的闭环或单端口脉冲发生器。脉冲发生器由 NLTL、功率放大器 (PA) 和固态高压脉冲发生器组成。闭环系统的能力优势在于其稳定性和中心频率可调性。实际上，与现有技术相比，由于体积和质量的节省，该系统的基于固态的设计提高了其现场使用的可能性。所提出设计的有效性由 16 节 NLTL 与基于固态横向扩散金属氧化物半导体 (LDMOS) 的 PA 和定制的 HV 脉冲发生器结合经验证明。由这些组件构成的闭环配置展示了 2.1 kW 的峰值功率到 50 $\欧米茄 $ 在 90 兆赫。这是能够产生连续脉冲流的基于固态开关的闭环 NLTL 配置的第一份报告。此外，我们提出了一种基于双二极管的 NLTL 设计，与单二极管对应物相比，它可以在更高的中心频率下运行和输出。