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首页> 外文期刊>Review of Scientific Instruments >Repetitive sub-gigawatt rf source based on gyromagnetic nonlinear transmission line
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Repetitive sub-gigawatt rf source based on gyromagnetic nonlinear transmission line

机译：基于回旋非线性传输线的亚千兆瓦射频重复源

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We demonstrate a high power repetitive rf source using gyromagnetic nonlinear transmission line to produce rf oscillations. Saturated NiZn ferrites act as active nonlinear medium first sharpening the pumping high voltage nanosecond pulse and then radiating at central frequency of about 1 GHz: shock rise time excites gyromagnetic precession in ferrites forming damping rf oscillations. The optimal length of nonlinear transmission line was found to be of about 1 m. SINUS-200 high voltage driver with Tesla transformer incorporated into pulse forming line has been designed and fabricated to produce bursts of 1000 pulses with 200 Hz repetition rate. A band-pass filter and mode-converter have been designed to extract rf pulse from low-frequency component and to form TE11 mode of circular waveguide with linear polarization. A wide-band horn antenna has been fabricated to form Gaussian distribution of radiation pattern. The peak value of electric field strength of a radiated pulse at the distance of 3.5 m away from antenna is measured to be 160 kV/m. The corresponding rf peak power of 260 MW was achieved.
机译：我们演示了使用旋磁非线性传输线产生射频振荡的高功率重复射频源。饱和的NiZn铁氧体充当有源非线性介质，首先使泵浦的高压纳秒脉冲变尖，然后以大约1 GHz的中心频率辐射：激增时间激发铁氧体中的旋磁进动，形成阻尼rf振荡。发现非线性传输线的最佳长度约为1 m。 SINUS-200高压驱动器，其特斯拉变压器结合到脉冲成形生产线中，其设计和制造可以产生1000脉冲的脉冲，脉冲重复频率为200 Hz。设计了一种带通滤波器和模式转换器，以从低频分量中提取射频脉冲，并形成具有线性偏振的圆形波导的TE11模式。已经制造了宽带号角天线以形成辐射方向图的高斯分布。距天线3.5 m处的辐射脉冲的电场强度峰值测得为160 kV / m。达到了260 MW的相应RF峰值功率。

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