查询词典 frequency bandwidth

The design of a surface acoustic wave filter with a center frequency of 44?MHz, a 1?dB bandwidth of 8?MHz, an out-of-band rejection of more than 60?

采用数字傅里叶变换技术设计并制作了一个中心频率为44MHz，1dB带宽为8MHz，带外抑制大于60dB，插损小于28dB的带通滤波器。

The signal processing system consists of a band pass filter with center frequency of 2.856 GHz and bandwidth of 10 MHz,a logarithmic detector,a analog digital converting module...

本系统有效地采用了虚拟仪器的技术，具有模块化、开放性、易于交互、可扩展的特点，测试结果表明，其分辨率达到0.1 mm，符合设计要求。

For a single filter, the center frequency is 39.5MHz, the 20dB shape factor is 2.8, and a bandwidth is 49 kHz,respectively.

除此之外，吾人另制作高频单一滤波器的中心频率值39.5 MHz，波形常数为2.8，频宽为49kHz。

Measured results indicate that the filter's center frequency was 6.02 GHz with a 3-dB bandwidth of 1.14 GHz and this filter was free from oscillations with either an 2.2-dB insertion loss or a 0.56-dB transmission gain.

共震器的损耗补偿只作用於主动滤波器的导通频段内，而且介入损失的调整并不影响到主动滤波器的中心频率与 3 dB频宽。

Besides, when digital system is employed, the huge relative bandwidth signal can be generated on intermediate frequency.

此外，数字方法还可以在中频上产生出相对带宽很大的信号。

This allows frequency response peaking elements to be added, multiple input inverting summing circuits to have greater bandwidth, and low-power line drivers to meet the demanding require- ments of studio cameras and broadcast video.

这使得频率响应峰值要添加，多输入反相总结电路元件有更大的带宽，低功耗的线路驱动器，以满足要求需要，对演播室摄像机和广播视频目。

Experts recommend that you buy a digital TV pay attention to purchase "wide line frequency" and "high bandwidth" product.

专家建议您在购买数字电视时注意购买"宽行频"和"高带宽"的产品。

Experts recommend that you purchase select line frequency is greater than 33KHz, bandwidth greater than 30MHz digital TV.

专家建议您在购买时选择行频大于33KHz、带宽大于30MHz的数字电视。

In recent years, SiC FET power transistor and GaN high electron movability power transistor represent the third generation semiconductor-wide bandgap semiconductor power devices, have advantages of high breakdown voltage, high power density, as well as high output power, high operation efficiency, high operation frequency, wide instant aneous bandwidth, operation in high temperature environment and strong ability of resisting radiation.

近年来以SiC场效应功率晶体管和GaN高电子迁移率功率晶体管为代表的第三代半导体－宽禁带半导体功率器件具有击穿电压高、功率密度高、输出功率高、工作效率高、工作频率高、瞬时带宽宽、适合在高温环境下工作和抗辐射能力强等优点。

The acquisition of signal and several processing methods for Laser Doppler signal are introduced in chapter 4, and the Short-time Fourier Transfer method are tried to process the high frequency, wide bandwidth, wide dynamic range and nonstable signal of this system.

第四章介绍了对信号的采集和几种常用的多普勒信号处理方法，并根据本系统信号的高频、宽带、大动态范围、非平稳的特点，提出了采用短时傅立叶变化的方法来对信号进行处理，从而得到振动位移的变化情况。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。