基于场效应管与阶跃恢复二极管的皮秒级脉冲源设计

Design of picosecond pulse source based on MOSFET and step recovery diode

1.
College of Aeronautics and Astronautics,Central South University,Changsha 410083,China;
2.
College of Computer and Communication,Lanzhou University of Technology,Lanzhou 730050,China

摘要: 针对已有脉冲源无法兼顾脉冲宽度和幅值的现象,提出一种基于场效应管（MOSFET）和阶跃恢复二极管（SRD）相结合的皮秒级脉冲源设计方案。通过研究分析传统的几种脉冲源的设计方案,设计出一种百伏级的高重频皮秒级脉冲发生器,在PSPICE上对设计方案进行仿真并制作出脉冲源PCB板,实测在2 MHz的重频下产生半幅脉宽约为400 ps、幅度110 V以上的极窄脉冲,波形稳定,为高分辨的超宽带探测雷达发射机的设计提供了新的选择方案。
- 阶跃恢复二极管 /
- 非线性传输线 /
- 窄脉冲 /
- 超宽带 /
- 场效应管
Abstract: As the existing pulse source can not balance pulse width and amplitude, a scheme of based on field effect transistor (MOSFET) and step recovery diode (SRD) combined with picosecond pulse source was put forward. Analyzing traditional designs of several pulse sources, we designed a high repetition rate picosecond pulse generator of 100 volt level and made a design simulation with PSPICE and developed the pulse source PCB board. Measurement shows 2 MHz repetition rate, half amplitude width 400 ps around, range above 110 V and stable waveform. The scheme providedes a new selection for high resolution UWB detection radar transmitter.
- step recovery diode /
- nonlinear transmission line /
- narrow pulse /
- UWB /
- MOSFET

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