frequency bandwidth造句
例句与造句
- 20m frequency bandwidth occupied by the data flow : 20 188 204 2 1 . 35 16 . 7m
20m数据流所占用的频率带宽为： - The minimum detectable electric field strength is 10 ~ 20 mv / m at frequency bandwidth of 3 hz . the dynamic range is 80 db at 250 mhz
在200mhz的频率下的全向性达到3db , 2ghz频率下全向性为1 . 5db 。 - Switching power amplifier is popularly used because of its virtues of low power losses , high efficiency and high frequency bandwidth
开关型功率放大器因其损耗小、效率高、通频带宽等优点，广泛取代了早期低效率的线性功放，成为目前功率放大器研究的重点。 - Comparing with the system which does not space - time code , space - time coding can obtain transmit diversity and increase channel capacity without frequency bandwidth loss
与空间未编码系统相比,空时编码可以在不牺牲带宽的情况下起到发射分集和提高功率增益的作用。 - Artificial neural network ( ann ) method is proposed to use in active control system after the analysis of the effective frequency bandwidth of tmd control system
在分析了被动tmd用于风振控制存在有效频带窄的问题后，提出了采用神经网络提供主动控制力的主动控制方法。 - It's difficult to find frequency bandwidth in a sentence. 用frequency bandwidth造句挺难的
- As far as the wide slot antenna is concerned , a broad s11 - 10db frequency bandwidth of 158 % and an operating frequency band of 1 . 9 ~ 16 . 25 ghz are produced by applying this method to it
对宽槽天线而言,应用这种方法得到了阻抗带宽为158 %的超宽带宽槽天线,工作频率为1 . 9 ~ 16 . 25ghz 。 - The relationship between the body dynamic frequency bandwidth and the precision of the dynamic surveying with incomplete inertial sensors is clarified which can be a guideline for practical inertial system designs
通过频域分析，阐明了载体姿态运动频带宽度与动态测量精度的关系，对实际工程中惯性系统设计具有重要的指导作用。 - Usually the frequency bandwidth of microstrip patch antenna is relatively narrow . however , it can be effectively broadened with the employment of the micro - electro - mechanism systems technique to fabricate microstrip antenna with multilayer dielectric substrates and patch
通常微带贴片天线的频带较窄，而利用微电子机械系统（ mems ）技术制作具有多层介质和贴片结构的微带天线，可以有效地扩展天线的带宽。 - The vertical delay stacked source obtains optimum matching with wall rock by controlling the charge mode and the excitation velocity , and maximum utilizes its energy . thus the seismic signal with the high frequency abundance and frequency bandwidth wide be obtained
垂直延迟迭加震源通过控制装药方式和控制炸药速度来达到与围岩的最佳匹配，最大限度的利用其激发的能量，激发出高频成份丰富、频带宽、高频能量高的地震信号。 - Become a kind of new electronics circuit - current - mode circuit . it is replacing the traditional design method of the voltage - mode in the high frequency high - speed signal processing realm 。 this thesis mainly discussed the modified second - generation current conveyors based on the current - mode kinds of new cuicuit components , they are stronger modified standard current - mode parts in fuctions on this foundation . mainly including the modified differential difference current conveyor ( mddccii ) 、 the fully balanced second generation current conveyor ( fbccii ) 、 ( full balances ) four - terminal floating nullor ( fbftfn ) and the current differencing buffered amplifier ( cdba ) , they are all function very strong standard current - mode parts , they all can provide some circuit functions of better than general operation amplifier , because they have the voltage importation and the current importation , therefore use it since can carry out the voltage - mode signal processing circuit expediently , can also carry out the current - mode signal processing circuit expediently , and have to increase the benefit bandwidth to accumulate more widely than the voltage - mode , but have their advantages more according to the current - mode filter of the modified current conveyor , because it constitutes in brief , the filter wave function is stronger and they are better than in general use operation amplifier of many advantages , be easy to composing for example 、 high speed 、 frequency bandwidth 、 the power supply voltage requests low 、 consume small , the impedance is different from etc . advantages , otherwise they have biggish dynamic range , and flexible circuit synthesize , so they are the best active parts
从第二代电流传输器ccii入手,重点研究了以下几种改进型的第二代电流传输器:改进的差动差分电流传输器mddccii 、全平衡第二代电流传输器fbccii 、多输出四端浮地零器ftfn 、全平衡四端浮地零器fbftfn 、电流差分缓冲放大器cdba的电路结构及其模型。然后在此基础上系统地研究了基于这几种改进型的第二代电流传输器的滤波器的设计方法,主要方法和结果如下:利用mddccii设计了差分式连续时间电流模式低通、带通滤波器;电流模式跳耦结构考尔低通滤波器;利用fbccii设计了带通二阶节滤波器及电流模式双二阶通用滤波器;设计了基于多输出端ftfn的电流模式二阶通用滤波器电路;通过数字化开关选择的基于fbftfn的电流模式通用滤波器;设计了基于最少个数电流缓冲放大器(两个cdba )的多功能通用电流模式滤波器及其在非理想因素情况下分析。设计滤波器的主要方法是采用级联设计、运算模拟(信号流图法)和反馈设计(跳耦法) 。 - In order to solve this problem , this research adopts the electrical self - regulation circuit in series , on the basis of the unchanged of transfer function of electromagnetism rate transducer , extend frequency bandwidth of the transducer , improving its capability . after the self - regulation , the transducer has high passing feature and inferior lower lever cut - off frequency ( below 1 hz )
为了解决普通电磁式速度传感器不能检测超低频振动信号的问题,本研究采用了一种串联式电子补偿电路,在保持电磁式速度传感器的传递函数性质(高通)不变的前提下,拓展了传感器的频宽,改善了传感器的性能。 - Simulation comparisons verify the superior performance of the tri - state pwm technology . experimental results indicate that the current - controlled tri - state pwm switching power amplifier based on sample - hold strategy has high frequency bandwidth and fast dynamic response in a wide load range , which can well meet the demands of high - speed magnetic bearing
仿真结果验证了电流三态调制技术的优越性能；实验表明本文研制的基于采样-保持策略电流三态调制开关功放具有结构简单、效率高、纹波小、电流动态响应快、频带宽、受负载影响小等优点，能很好地满足高速磁轴承的要求。 - A patch antenna with air holes in the substrate has been designed . the finite - difference time - domain ( fdtd ) method together with the perfectly matched layer ( pml ) boundary treatment has been used to study the performance of the antenna . it is shown that the surface waves are significiently suppressed , the frequency bandwidth is improved , the sidelobe levels are reduced and consequently the gain in the forward direction is improved by 14 db ( about 4 db higher than the value reported previously )
设计了一种基底钻周期圆孔结构的电磁(光子)晶体贴片天线，用fdtd方法并结合pml吸收边界条件对该天线进行了研究，结果表明本文所设计的基底钻孔型电磁晶体贴片天线取得了多方面的性能改善，与普通天线相比，基底中的表面波受到很大抑制，天线的带宽增加，远场方向图上天线的旁瓣和背瓣被明显削弱，向前辐射的增益由原来的12db增加到26db ，增加了14db ，比文献上报道的gonzalo等人的研究结果提高了4db 。 - The modulating signal is generated in the way of direct digital synthesizer technology . the signal has many characteristics such as ultra wide frequency bandwidth , ultra high frequency resolution and ultra good phasic continuity , etc . thus it can be achieved the high frequency and amplitude stability of the modulating signal
本文采用了数字频率合成技术( dds )来产生调制信号,它具有超宽的频率带宽、超高的频率分辨率和相位连续性等特点,可以实现声光调制信号的频率和振幅的高稳定性。 - We design the qmf based on the criteria of minimum frequency bandwidth and the qmf that possess linear phase , and give a example of a signal decomposed and restructured . 4 . in the research of channel dropping filters , we use 5 rank butterworth filter to approach the digital filter . we design lc unpower netwok and rc power network . we manufacture lc lowpass and highpass filter ， and test their performance ; we simulate the appliance of the channel dropping filters in the system
4 .在频带分割滤波器的设计方法中，用5阶巴特沃斯滤波器逼近最小频宽正交镜像滤波器，对无源和有源滤波器进行了仿真设计；设计并制作了无源lc低通和高通滤波器，测试了它们的性能；并对分割滤波器在系统中的应用进行了计算机仿真。
