频带

In Chapter 1, the introduction of the 60 GHz applications and proposed RF front-end receiver architecture are presented.

在第一章中，我们简短介绍目前60 GHz不需使用执照的频带以及提出射频前端的架构。

Third, In order to check local site effect on this grassplot, we set up the other seismometer(056A) about 20 meters away from the grassplot.

由双站法可以看出，主要的放大频带落於10Hz 左右之高频区，呼应微地动测量所得到的第二峰值也落於此高频区。

Computer simulations reveal that among the 20:1 ultra-wide frequency range VSWR is small, antenna pattern doesn't split and the lognitudinal length is less than half of the traditional small angle LPDA.

计算机模拟结果表明：该天线在20：1的超宽频带内驻波比小、方向图不分裂，纵向长度比传统方法设计的LPDA缩短一半以上。

This article high accuracy, good dynamic performance, the working frequency band of the Hall voltage and current sensors, and the American Analog Digital introduced single-chip high-speed 12-bit successive comparison converter AD574, as well as RS485 and other communication devices designed a set of electrical quantities collection and monitoring system.

本文将精度高，动态性能好，工作频带宽的霍尔电压，电流传感器，与美国模拟数字公司推出的单片高速12位逐次比较型转换器AD574，以及RS485通讯器件等设计了一套电气量采集与监控系统。

DUV is introduced. It permits signals to "hitch-hike" on existing microwave radio systems by using the lower end of the frequency band not normally used for voice.

DUV推出，它允许信在现有的微波无线电系统中"搭便车"，使用微波频带中的低端部分，通常不用于话音传输。

But, this is central technology of the information superhighway which must increase bandwidth to provide more and more users and multimedia application.

但为了支持越来越多的用户和多媒体应用，必须增加频带宽度，这是信息高速公路的核心技术。

The signal amplifier should have features like low noise signal, zero drift, high precision, wide frequency band, high input resistance, and low output resistance.

信号放大器应该有特点，例如低噪声信号，零点漂移小，精度高，宽的频带，高输入电阻，低输出电阻。

The resource of frequency band is more and more invaluableness, the demands for transmission efficiency and storage of speech grow higher and higher.

频带资源越来越宝贵，对语音的传输效率和存储容量提出了很高的要求，解决这一问题的一个主要方法就是压缩语音，以尽可能少的数据量和最低的失真度来表示语音，即进行语音压缩。

The ambient noise is uniformly insulated between 125 Hz and 2000 Hz, averagely insulating sound about 22 dB, by the isolation booth, and that fits in with the spectrum and SPL of stored grain insect action sound.

实验表明，在125~2000Hz的频带范围内，隔声室能均匀隔离环境噪声，平均隔声量为22dB，可满足储粮害虫活动声的频率范围和声压级要求。

The number and location of IR bands have something relationship with isomorphism and its chemical composition.

彩色电气石的红外吸收光谱频带数及位置与电气石的类质同象和化学成分有关。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。