The Air Force Phillips Laboratory, in collaboration with the Army Research Laboratory (ARL), is developing lateral geometry, high-power photoconductive semiconductor switches (PCSS) for use in phased-array, ultra-wideband (UWB) sources. The current switch utilizes an opposed contact geometry with a 0.25 cm gap spacing and is an extension of previous work on 1.0 cm PCSS devices. This work presents the development and demonstration of the 0.25 cm PCSS under both ideal laboratory conditions and potential source conditions. The laboratory configuration consists of two high-bandwidth transmission lines connected with a PCSS. The potential source configuration consists of a vector-inversion pulse generator (Blumlein) commuted with a PCSS. Independent, low-jitter PCSS operation is demonstrated by series coupling two independent Blumleins into a common load. The 0.25 cm PCSS is shown to operate at 20 kV charge voltage. 65 ps RMS switching jitter, less than 450 ps risetime and greater than 1 kHz pulse repetition rate (PRR) when triggered using a compact, high-power laser diode.
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机译：空军菲利普斯实验室与美国陆军研究实验室（ARL）合作，正在开发用于相控阵超宽带（UWB）光源的横向几何，高功率光电导半导体开关（PCSS）。电流开关采用相对的接触几何结构，间隙间距为0.25 cm，是对1.0 cm PCSS设备先前工作的扩展。这项工作介绍了在理想实验室条件和潜在放射源条件下0.25 cm PCSS的开发和演示。实验室配置由两条与PCSS连接的高带宽传输线组成。电位源配置由与PCSS换相的矢量反转脉冲发生器（Blumlein）组成。通过将两个独立的Blumleins串联耦合到一个公共负载中，可以演示独立，低抖动的PCSS操作。 0.25 cm PCSS显示为在20 kV充电电压下工作。使用紧凑的高功率激光二极管触发时，RMS开关抖动为65 ps，上升时间小于450 ps，脉冲重复率（PRR）大于1 kHz。
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