摘要
分析复杂载体 (卫星、舰船 )上短波波段单极天线和矩形环天线特性。由于天线工作在短波波段 (3～ 30MHz) ,通常载体尺寸与波长可比拟 ,因此天线与载体之间的电磁作用比较复杂 ,天线特性会受到很大影响。用时域有限差分 (FDTD)方法模拟单极天线和环天线的算法 ,然后对一种简化卫星和舰船模型上单极天线和环天线特性是如何受天线位置、天线半径以及载体结构的影响进行模拟与分析。计算结果对实际工程应用有重要参考价值。
The radiation characteristics of HF antennas mounted on complex target (ship,satellite) is analyzed numerically in this paper. The reaction of electromagnetic waves between the carrier and antenna is very complicated due to the carrier′s electrically small structure among the frequencies of interest (3～30 MHz). And thus high frequency approximate methods are inapplicable to this case. Consequently,we utilize a numerical method-the Finite-Difference Time-Domain (FDTD) method,which is in advantages of modeling complex objects and of the inherent broad-band nature-to model the radiation characteristics of this system. Numerical results of a satellite model with dipole antennas and a ship model with ring antennas are provided to validate the availability of presented scheme.
出处
《电波科学学报》
EI
CSCD
2004年第2期135-142,共8页
Chinese Journal of Radio Science
