一种宽适应性栅极浮动板调制器的实现方法  

An Implementation Method of Grid Floating Deck Modulator with Wide Adaptability

作　　者：李慧[1] 张长军[1] 王松涛[1] 王兰[1] 

机构地区：[1]中国电子科技集团公司第二十七研究所,郑州450047

出　　处：《电光系统》2015年第1期8-11,共4页Electronic and Electro-optical Systems

摘　　要：浮动板调制器具有输出波形好、功率小、波形变化灵活等特点，在中小功率控制极微波管和行波管中被广泛使用。本文介绍了一种采用功率MOSFET浮动板调制器的设计，对调制器的基本原理和关键组成部分进行详细说明。对调制器的主要组成部分，如脉冲形成电路、隔离驱动，和关键器件选择，即MOSFET开关管的选择进行了较为详细的介绍。最后介绍了该调制器的设计实例，给出了性能测试结果和输出波形，该浮动板调制器满足行波管栅极端使用要求，具有转换速度快，过冲小等优点。Floating deck modulator （FDM） has many advantages such as perfect output wave, low power and flexible wave variety, so it is widely used in middle and small power microwave tube and TWT. In this paper, a design adopting power MOSFET FDM is proposed, and basic principles and critical components of modulator are detailed. The primary components of modulator such as pulse forming circuit, isolation driving and selection of key components （ selection of MOSFET switches） are introduced in detail Finally, an example of the modula- tor design is presented, and test result and output wave are given. The floating deck modulator is satisfied by the requirement of TWT grid and is characterized by its fast switching speed and small overshoot.

关 键 词：栅极调制器 行波管 FPGA 隔离驱动 MOSFET开关管 

分 类 号：TN761[电子电信—电路与系统]