频率色散 meaning in English
dispersion of frequencies
Examples
- The dielectric constant of srtio3 ( sto ) thin films is voltage - dependent near the curie temperature tc ( about 40k ) . and no dispersion in is observed in sto at frequencies up to 10 ghz . yba2cu3o7 - x ( ybco ) high temperature superconducting thin film has very low microwave surface resistance
Srtio3 ( sto )薄膜在其居里温度附近（ ~ 40k ）具有介电常数随电场强度变化而变化的性质，同时sto在10ghz以下介电常数没有频率色散性。 - The study indicates that there are some differences between the multilayered films and the uniform films in the dielectric constant - frequency relation and capacitance - voltage chara cteristics . the report also analyses the mechanism of dielectric enhancement of the multilayered thin films prepared by the sol - gel process
研究同时表明， batio _ 3 srtio _ 3多层膜与单层膜的介电频率色散程度、 c - v特性和介电系数与温度的关系均略有不同。 - Shortwave channel is time varying transmission channel . it has dispersion in frequency and time domains . this characteristics hinds the data transmi - ssion at high speed and the correction of received data . in this dissertation i have analyzed the statistic characteristic of shortwa - ve channel , established the model of shortwave channel and simulated the rayl eigh fading distribution . the technology of spreading spetrum has been proved that it has the capability for anti - multipath and discerning multipath
在短波通信中，由于信道的时间色散和频率色散，引起多径展宽和多径衰落，前者限制了数据的传输速率，后者造成短波数据通信中出现突发错误，为了解决多径效应对短波通信的影响，本文所做工作如下：首先详细分析了短波信道的统计特性，建立其数学模型；其次分析了扩频通信的特点，从理论上证明扩频技术不仅具有抗多径干扰能力，而且具有分离多径的能力；介绍了传统的rake分集合并技术的特点。