aperture coupling造句

• So , in this paper , a new feeding method is proposed . it is a combination of aperture coupling from a slotted waveguide and coplanar feeding using series - fed microstrip line
  因此,在本文中提出一种对微带贴片天线阵馈电的新方法,它是由波导缝隙的口径耦合馈电和微带线串馈的平面馈电共同完成的。
• The use of aperture coupled feeding widens the working band and increases the isolation . simultaneously , the application of round patch can upgrade the gain and radiation efficiency of the antenna
  采用口径耦合馈电能够展宽带宽,提高隔离度,而采用圆形作为贴片形状可以提高天线的增益和辐射效率。
• Firstly , the theory of microstrip antenna is simply analyzed . based on the research of it , the best feeding way which is aperture coupled feeding is found . at the same time , the round patch is chosen
  本文首先对微带天线的理论进行了简要分析,通过对微带天线理论的研究,找出了天线最优化馈电方式? ?口径耦合馈电;同时,也选出了天线所采用的贴片形状? ?圆形。
• The conformal microstrip antenna with some unique character has been applied in many fields , especialy on speedy objects . in this paper , an efficient fdtd algorithm is introduced to analyse the microstrip antenna . firstly , the fdtd formula in descartes coordinate system and in cylindrical coordinate system are obtained from the time _ dependent maxwell equations using the yee algorithm in a calculating region where the dielectric parameters are independent of time and space . the choice of the space discretization units and the time discretization interval are discussed which are decided by the accuracy and stability respectively . the shape and setup of the excitation source are discussed too . the excitation source is chosen to be gaussian pulse in shape . secondly , the mur ' s first - order and second - order boundary condition are deduced in cylindrical coordinate system . the methods of transforming radiation fields from near zone to far zone in the frequency domain and in the time domain are presented when fdtd is applied to analyse the characteristics of far zone . finally , three kinds of microstrip antennas are analysed . they are a slot antenna that lies on a plane ground of a microstrip , a slot antenna that lies on a cylindrical ground of a microstrip and a microstrip line _ fed aperture coupled stacked rectangular patch antenna in cylindrical coordinate system
  本文从麦克斯韦旋度方程出发，建立了笛卡儿坐标下无源空间中均匀无耗媒质的fdtd基本方程和圆柱坐标下无源空间中均匀无耗媒质的fdtd基本方程，详细讨论了fdtd法计算中时间步长和空间步长的选取原则以及激励源的类型和设置；推导了mur一阶和二阶边界条件在圆柱坐标下的差分格式；给出了在用fdtd法计算天线的远场辐射特性时必需采用的频域和时域近场远场变换技术；最后用fdtd法计算了平面微带缝隙天线、柱面共形微带缝隙天线和柱面共形微带层叠天线的输入阻抗和远区辐射场，并分析了天线的一些参数的变化对天线输入阻抗的影响，得出了一些有用的结论。