通信专业毕业设计外文翻译.docx

H-MRTD simulation of dual-frequency miniature patch antenna
YU Wen-ge15 2, ZHONG Xian-xin1, LI Xiao-yi1, CHEN Shuai1
(1. The Key Lab for Optoelectronic Technology &Systems of Ministry of Education ,
Chongqing University , Chongqing 400044 , China ;
2. Basic Logistical Engineering University , Chongqing 400016 , China)
Abstract: a novel MEMS dual-band patch antenna is designed using slot-loaded and short-circuited size-reduction techniques. By controlling the short-plane width , fi0 and f 30 , two resonant frequencies, can be significantly reduced and the frequency radio ( f^0/ fio) is tunable in the range 〜 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.
Key words : dual-frequency antenna; H-MRTD method ; FDTD method ; MEMS; UPML absorbing boundary conditions
1 Introduction1
Recently, patch antenna research has focused on reducing the size of the patch, which is important in many commercial and military applications. It has been shown that the resonant frequency of a microstrip antenna can be significantly reduced by introducing a Short-circuited plane or a partly short-circuited plane where the electric field of the resonant mode is zero"；or a short-pin near the feed probe* Using two stacked short-circuited patches, dual-frequency operation has been obtained。]. However, the use of a stacked geometry leads to increases in the thickness and complexity of the patch. In this paper, we demonstrate that by short-circuiting the zero potential plane of a sl