爱词霸英语   汉语   手机版   软件版下载 | English
每日一句:正在加载...
1.This antenna works over a bandwidth centered at 2.4GHz with relative bandwidth 7.2% under VSWR≤2,and the absolute bandwidth is 173MHz,which is 60MHz larger than that of the similar antenna without DGS.
天线工作在2.4GHz频率上,VSWR≤2的带宽为7.2%,绝对带宽173MHz,比不带DGS结构的同类天线带宽增加60MHz。收藏指正
2.An experiment has been done to verify the design by using HfO_2 and SiO_2. The experimental result shows that the band gap corresponds to wavelength band from 331.2nm to 350.4nm and the relative bandwidth is 5.63%.
实验上采用HfO_2和SiO_2两种薄膜材料,若透射率在1%以下为光子晶体禁带,则禁带波长范围从331.2nm到350.4nm,相对带宽5.63%。 从而证明了角域叠加设计的正确性。收藏指正
3.Annexed impedance adopted to optimize dipole antenna (DA) makes DA become ultra broadband antenna, which relative bandwidth ratio reaches 0.73. The designed shield resonance loop antenna (SRLA) holds better standing wave ratio (SWR), stronger ability to suppress interferences.
采用独特而巧妙的附加电抗等结构设计,使传统DA成为超宽频带天线,相对带宽比达到0.73; 设计出屏蔽谐振式环天线,使得驻波比更加优良,抑制干扰能力更强;收藏指正
4.Meanwhile a valuable conclusion that general cylindrical box type windows with dielectric disks made of Al2O3 ceramic can be used to transmit CW of higher power than 120kW and workable relative bandwidth may achieve about 14% in L band, is made by calculated results of some typical examples.
同时，通过计算一些典型的实际问题得出了一个具有重要价值的结论：在L波段，采用Al_2O_3陶瓷窗片的普通圆柱盒型窗可用于传输120kW以上的高功率连续波，并且具有14％左右的可工作相对带宽。收藏指正
5.A broad-band and low loss SAW filter has been developed using Y-41°LiNbO3 (LN) sub-strat. The filter employed a U-shaped multistrip coupling unidirectional transducer (UMSC-UDT) and an image impedance connected Coupling transducer. lts performances are as follows: relative bandwidth at 3dB is 10%, insertion loss≤7dB, rejection area attenuation≥50dB.
本文介绍一种用Y-41°LiNbO_3作基片的宽带声表面波低损耗滤波器,它采用U型多条耦合单向换能器(UMSCU-UDT)和镜象阻抗连结耦合换能器结构,其性能是3dB相对带宽达10%,插人损耗≤7dB,带外抑制≥50dB.收藏指正
6.It is shown that the imaging algorithm of traditional SAR can be used effectively only on the condition of narrow relative bandwidth signals, narrow azimuthed processing angle and narrow swath width. Large range migration has brought many new features and difficulties. After comparing many imaging algorithms, we find out the direction research of the UWB-SAR imaging algorithm.
指出传统SAR的高效成像算法只有在窄信号相对带宽、窄方位向处理角、窄条带宽度的条件下才能有效运用，大距离徙动给大处理角UWB-SAR成像带来了许多新的特点和难点，据此分析比较了各种成像算法，找出了适合UWB-SAR高效算法研究的基础。收藏指正
7.It is shown how a maximum photonic band-gap for TE mode is obtained by choosing the proper width of the rectangular rods. The two-dimensional bandgap for TE mode of this design is 0.083(2π c/a , here a is the period of grating). The polarization frequency band corresponds to a wavelength band ranging from 1.72 to 2.4μm, with the theoretical relative bandwidth being 33.1%.
结果表明 ,TE模式的光子禁带宽度为 0 . 0 83(2πc a ,a是光栅的周期 ) ,设计的偏振波长从1 .72 μm到 2 . 4 μm ,相对带宽为 33 .1% .收藏指正
8.This paper presents a design method of coaxial feed that is common in S/X band,has different illumination angle of -10 dB in S and X band and can be used to illuminate a radio telescope antenna with a diameter of 50 m. The relative operation bandwidth of S and X bands is 20%.
提出了一种用于射电望远镜50m天线、S/X双频共用且对S、X双频段具有不同照射角的同轴馈源设计方法,S、X两个频段的相对工作频带宽度均为20%,S频段为同轴馈源,内导体为圆波导馈源工作在X频段。收藏指正
9.Compared with the performance curves of the primary AOD, the AOD with the optimum design shows great capacity: at the extreme point of Bragg Diffration the optimized one obtain a 2.4 times wilder relative 3db Bragg bandwidth than the primary one;
用图示的方法将优化设计后的曲线与非跟踪的曲线进行对比,在进入布拉格衍射区的临界点处经优化设计的器件相对带宽达到非跟踪器件的相对带宽的2.4倍; 在相对带宽?收藏指正
10.HFC(Hybrid Fiber Coax)access network is attached great importance because of its tremendous bandwidth and relative economy.
HFC(HybridFiberCoax)接入网以其相对的经济性和巨大的带宽受到广泛重视。收藏指正
尝试查询
汉英释义