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- Estimation of Doppler central frequency 多普勒中心频率估计
- Doppler central frequency 多普勒中心频率
- The theoretical study shows that the central frequency is linear with the square of the voltage applied on the Wheatstone bridge. 理论研究表明:中心频率与电桥电压的平方成线性关系;
- The phase noise in the locked condition is measured to be -107 dBc/Hz at 10 MHz offset,and that of the ring VCO at the central frequency is -99 dBc/Hz at 10 MHz offset. 环形振荡器在偏离中心频率为10MHz处的单边带相位噪声为-107dBc/Hz.;在锁定条件下;锁相环在偏离中心频率为10MHz处的单边带相位噪声为-99dBc/Hz
- The experimental results show that the frequency bandwidth is 22.4% for a 3-dB axial ratio criterion and is 33.85% for a VSWR<2 criterion at the central frequency 10 GHz. 获得的实测结果为:中心频率为10GHz;电压驻波比小于2的带宽为33.;85%25;圆极化轴比小于3dB的带宽为22
- Without a RF filter, B should be more than 9dB so that the out of band noises near the central frequency can achieve the DAB transmitting signal criterion. 在不加滤波器的情况下 ,离中心频率较近的带外噪声欲满足DAB发射信号频谱标准 ,B至少要在 9d B以上。
- The central frequency of the filter is adjusted by changing the voltage applied on the Wheatstone bridge, which can change the average temperature and axial strain of the bridge. 通过调节施加在压敏电桥上的电压大小来改变桥的平均温度和轴向应变,可调节滤波器的中心频率。
- A lithium niobate anisotropic acousto-electro-optic spectrum analysor with central frequency 60 MHz was made. Its central frequency can be changed from 50 MHz to 70 MHz and its bandwidth can be increase from 26 MHz to 37 MHz. 用LiNbO3制作了一个60MHz的反常声电光频谱分析器件,测试结果表明,器件中心频率可以由50MHz变到70MHz,频带宽度由原来的26MHz扩大到37MHz。
- Applying the advanced ANSOFT non-linear circuit design software Serenade, the paper designed a high linearity FET DRO by selecting varactor and optimizing output matching. The DRO operates at the central frequency of 18GHz. 在 Ansoft非线性电路设计软件 Serenade支持下 ,通过变容管的选取 ,输出端的优化匹配 ,设计了一中心频率为 18GHz的高线性度的场效应管介质谐振器稳频振荡器。
- In order to estimate the direction of arrival (DOA) of a broadband distributed source, a class of fast algorithms, such as central frequency algorithm, median algorithm and mean algorithm, are presented. 摘要针对宽带分布源到达角估计问题,提出了一类快速的估计算法,即中频法、中值法和均值法。
- The simulated results showed that the central frequency of the filter was tuned from 1.25 GHz to 1.43 GHz , the tunability is 13.5%, when the value of IDC changes from 1.72 pF to 1.26 pF. 仿真结果表明:当电容值从1.;72 pF变化为1
- Since central frequency of the antenna have important influence on depth and precision of detection results, frequency-dependence of dielectric constants of pavement medium are analyzed, and the range of central frequency are deduced using debye-model. 鉴于探地雷达的发射频率对其检测的精度和深度都会产生重大影响,对介质的介电常数进行频域分析,分析介电常数随频率的变化趋势,并应用德拜(Debye)模型推导探地雷达用于路面质量检测的频率范围。
- A bandreject filter adopting this transconductor has 33 Hz bandreject bandwidth and-39.6 dB attenuation at its 50 Hz central frequency and can be used for eliminating 50 Hz interfering signal. 用该跨导器组成的gm-C带阻滤波器工作在50Hz的中心频率时;陷波带宽33Hz;陷波深度-39.;6dB;可应用于滤除信号中的50Hz市电干扰
- Without increasing the size of the microstrip, the bandwidth of stopband or passband of the novel PBG microstrip line can be changed when the dispersion between the central frequency of PBG st. 由于采用了导带PBG结构和接地板PBG结构的复合,只需调整导带PBG结构与接地板PBG结构的中心频率的差值就能对阻带和通带进行相应的调整,而且并不增加该PBG微带线的尺寸。
- This paper treats of the working principle of controlling the central frequencies of the active band filter by Z80 microprocessor. 本文介绍了Z80微处理器控制有源带通滤波器的中心频率的工作原理。
- A frequency grid anchored at 193.1 THz with interchannel spacings at integer multiples of 50 GHz and 100 GHz is specified as the basis for selecting channel central frequencies. 一个铆定在193.;1 THz,通道间的空间以 50 GHz 和 100 GHz 整数倍增长的频率栅格被作为选择信道中央频率的基础。
- Such values are central to our way of life. 这些价值对于我们的生活方式是至关重要的。
- A measurement of the difference in cycles/sec between the limiting frequencies of a band in which the attenuation of any frequency, with respect to the central frequency, isless than a specified value(usually half power or three db). 一个频带的上下界频率之间差的一种度量,以周期/秒表示。在该频带中,任何一频率的衰减(对中心频率而言)小于一个特定的值(通常为半功率或3分贝)。
- She stay in a small hotel near Central park. 她住在中央公园附近的一家小旅馆。
- Choose a central location for your house. 把你的家选在一个便利的地方。