宽频带

Simulation results show that this antenna can broaden the practical bandwidth for both higher directivity and impedance matching.

仿真结果显示这种改进增宽了此类天线兼顾高定向性和阻抗匹配的实用频带。

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。

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。

In Chapter 4, the meander line and fractal technique are introduced to the design of antenna.

设计了一种用双杆作辐射体的平面组合单极子天线，具有结构简单、尺寸小、频带宽等诸方面的优点。

The communications mode under computer control system which composes such as large covered area、wider frequency band、longer transmission distance、bigger volume、high quality、flexibility and multi-address connections.

利用卫星通信与航天技术相结合并由计算机实现控制的通信方式，其优点是覆盖面积大、频带宽、传输距离远、容量大、质量好、机动灵活并可实现多址连通等优点。

He cautioned though that: considering the paucity of data, the prediction bands are very wide.

"但他告诫说："考虑到的数据不足，预测频带很宽。

The eight-divider percale can work properly in the 800M Hz frequency, broadband sound, and output swing with 0V~1.8V.

该八分频器可以正常工作在800MHz的频率上，具有较宽的频带范围，电压输出摆幅为0V～1.8V。

Adopting this principle,it is possible to measure wide range AC current precisely and simply. relay protection ; Rogowski coil ; zero drift ; digital signal processing

Rogowski线圈具有结构简单、安装方便、检测灵敏度高、频带宽等优点，但其易受电磁干扰的影响，为此本文提出以Rogowski线圈为传感器结合数字信

This principle can measure large range AC current precisely. relay protection ; Rogowski coil ; zero drift ; digital integrator

Rogowski线圈具有结构简单、安装方便、检测灵敏度高、频带宽等优点，但其易受电磁干扰的影响，为此本文提出以Rogowski线圈为传感器结合数

The electromagnetic spring with tooth structure is adopted in this paper to adjust the stiffness of isolator, which make the isolator work with different stiffness in different excited frequencies. So the isolation performance is improved as the resonance frequency is eliminated in a broad band.

本文采用齿形结构的电磁弹簧来改变隔振器的刚度，使隔振器在不同外扰频率下变刚度运行，从而能实现在较宽的频带范围内无共振峰，改善隔振性能。

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。