摘要
本文从电磁场的复玻印廷定理出发 ,对由多根天线组成的天线系统的广义谐振行为进行了深入的研究 ,揭示开放系统中广义谐振发生的条件和矩阵描述 .在此基础上 ,导出天线系统的广义Foster定理和表征广义谐振的网络Q值 .研究实例表明 ,广义谐振在近场区可表现出强场尖峰效应 。
This paper begins with a complete description of the complex Poynting theorem,followed by a rigorous study of the generalized resonance in a multi-antenna system.We discuss the condition generating the generalized resonance,which is the balance of the electromagnetic field energies stored in the antenna open system.The matrix expression of the generalized resonant factor is derived.Based on the energy dependence,we introduce the generalized Foster theorem for an arbitrary antenna system and the network quality factor Q to further describe the behaviors of the generalized resonance.Some practical examples show that the generalized resonance may take on the phenomena of strong and sharp field in the near field region and super-directivity in the far field region of the antenna system.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2003年第z1期2205-2209,共5页
Acta Electronica Sinica
基金
国家自然科学基金 (No .69931 0 30 )
关键词
多天线系统
广义谐振
广义Foster定理
网络Q值
multi-antenna system
generalized resonance
generalized Foster theorem
network quality factor Q
