Effect of aperture field distribution on the maximum radiated power at atmospheric pressure

• 来源期刊: 中国物理B（英文版）
• 关键词: field equivalent principle aperture antenna air breakdown maximum radiated power
• 年，卷（期）: 2017,（11）
• 页码范围: 324-328
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/1674-1056/26/11/115101

摘要

The air breakdown in the high-power antenna near-field region limits the enhancement of the radiated power.A model coupling the field equivalent principle and the electron number density equation is presented to study the breakdown process in the near-field region of the circular aperture antenna at atmospheric pressure.Simulation results show that,although the electric field in the near-field region is nonuniform,the electron diffusion has small influence on the breakdown process when the initial electron number density is uniform in space.The field magnitude distribution on the aperture plays an important role in the maximum radiated power above which the air breakdown occurs.The maximum radiated power also depends on the phase difference of the fields at the center and edge of the aperture,especially for the uniform field magnitude distribution.