针对电子脉冲脉宽调制技术的需求，提出了一种紧凑型电子脉冲脉宽对称型调制技术，其核心是利用交变电场对电子脉冲空间各部分电子施以差别性能量调制以达到调制电子脉冲脉宽的目的。详细阐述了该技术的工作原理，包括交变电场的选择、脉冲压缩幅度的变量关系以及轴向磁场的聚焦约束作用，分别给出了不同类型调制电场设置下脉冲压缩调制和展宽调制所对应的约束条件及实施例。

Aiming at the urgent needs for modulation technique of electronic packet width, we propose a compact symmetric type electron packet width modulation technique. The core of which is the introduction of the carefully chosen alternating electric field, which imposes differential energy modulation on electrons of different part in the electron packet, achieving the purpose of modulating the width of the electron packet. The details are given, including the choosing of the alternating electric field, pulse modulation amplitude relationship and the transverse confinement of the axial magnetic field. The requirements for both compression and broadening modulation in different types of modulating electric field are obtained. The example demonstrates its validity.