摘要
利用槽隙加载及短接技术设计了双频小型微带天线。通过调节短接面宽度,两谐振频率f10及f30可明显降低,天线尺寸显著减小,而且频比(f30/f10)的可调范围为1.7～2.3。首次将三维H MRTD(Haar Wavelet BasedMultiresolutionTimeDomain)全波分析方法应用于该天线的建模和分析,并将H MRTD数值计算公式推广到了非均匀有耗媒质中。数值模拟结果同传统FDTD(FiniteDifferenceTimeDomain)方法及实验结果进行了比较。结果表明,每个波长只需取较少的空间离散网格,三维H MRTD时域全波分析方法便能较精确地模拟微机械微带天线,并能有效地减少CPU计算时间及节省计算机内存。
A novel MEMS dual-band patch antenna is designed using slot-loaded and short-circuited size-reduction techniques. By controlling the short-plane width, f_(10) and f_(30), two resonant frequencies, can be significantly reduced and the frequency radio (f_(30)/f_(10)) is tunable in the range 1.7～2.3. The Haar-Wavelet-Based multiresolution time domain (H-MRTD) is used for modeling and analyzing the antenna for the first time. In addition, the mathematical formulae are extended to an inhomogenous media. Numerical simulation results are compared to those achieved using the conventional 3-D finite-difference time-domain (FDTD) method and measured. It has been demonstrated that, with this technique, space discretization with only a few cells per wavelength gives accurate results, leading to a reduction of both memory requirements and computation time.
出处
《光学精密工程》
EI
CAS
CSCD
2004年第3期292-297,共6页
Optics and Precision Engineering
基金
ProjectSupportedbytheMajorStateBasicResearchDevelopmentProgram
"IntegratedMicro Optical Electron ic MechanicalSystem" (ProjectNo .G19990 3310 5 ) .
