1)noise temperature噪声温度
1.The noise temperature of active array antenna is main component of active phased array radar system noise.有源阵列天线系统的噪声是有源相控阵雷达系统噪声的主要成分,通过建立基于有源阵列天线系统的噪声分析模型,给出该系统噪声温度的具体计算方法,得到该系统噪声温度的计算公式,进一步推导出该系统增益与噪声温度比值的计算和测试方法。
2.The paper discusses the ambient and inner noise temperature, probing into how to improve the quality factor of receiving system,then the reception capability of Satellite television receiving system will be improved.通过讨论环境噪声温度和内部噪声温度,探讨如何提高系统品质因数,从而提高卫星电视接收系统的接收能力。
3.The noise temperature measurements for the receiving modules, the sub-arrays and the whole active phased array are discussed in this paper.在推广了IRE噪声系数定义的基础上 ,采用Y参数法可测得在特定条件下各通道接收组件、子阵组件或整个接收阵的有效输入噪声温度。
英文短句/例句
1.ratio of gain to noise temperature of an antenna天线增益噪声温度比
2.The noise temperature is in the most favourable case given by the temperature of the receiver.理想的噪声温度即是接收机的温度。
3.Calculation of Noise Temperature Due to Reflector Antenna Ohmic Loss反射面天线欧姆损耗噪声温度的计算
4.A Calculation Method for the Output Noise Temperature of Standard Thermal Noise Source一种热噪声标准源等效输出噪声温度的计算方法
5.Analysis and processing of abnormality of nosie temperature on the high side for CINRAD/SA radar systemCINRAD/SA雷达系统噪声温度异常偏高的分析处理
6.Noise equivalent temperature difference (NETD)噪声当量温度差(NETD)
7.Influence of Oil Temperature to Noise of Engine内燃机润滑油温度对噪声影响的研究
8.The effects of the eradiating noise on account of the temperature and rate of flow are also studied.还进行了温度和流量对辐射噪声影响的研究。
9.Electronic noise of diluted magnetic semiconductor (Ga,Mn) As around Curie pointCurie温度附近稀磁半导体(Ga,Mn)As的电学噪声谱性质
10.COMPARISON OF CRITICAL PITTING TEMPERATURES FOR OIL INDUSTRY STEELS USING ELECTROCHEMICAL NOISE电化学噪声方法比较石油用钢的临界点蚀温度
11.The Wide Aperture Temperature Adjusted Noise Source in 10GHz~90GHz10GHz~90GHz宽口径变温噪声源
12.The thermal noise of resistance could be overcome by reducing the physical temperature, choosing appropriate working frequency band low noise elements, etc.可通过降低电路的物理温度、择合适的工作频带及低噪声元件等措施,克服电阻热噪声。
13.Temperature Effect on Neuron Membrane Ion Channels in a Noise Enviroment;突触噪声作用下神经元细胞膜离子通道的温度效应
14.quantum limited sensitivity量子噪声限制灵敏度
15.measured noise level [MNL]量度所得的噪音声级
16.equal listener response scale等听者响应标度 -声学中噪声标度
17.Improvement of CMOS LNA by noise reduction and linearity基于噪声相消和线性度提高的低噪声放大器
18.ultralow noise microwave cryoelectronic system超低噪声微波低温电子学系统
相关短句/例句
temperature noise温度噪声
3)noise temperature ratio噪声温度比
4)noise thermometre噪声温度计
5)noise thermometer噪声温度计<声>
6)Equivalent noise temperature等效噪声温度
延伸阅读
噪声温度 表示噪声源(热源、噪声管、射电源、接收机系统或其他有源多端网络)所发出的噪声功率的量度。它等于一个电阻在与这个噪声源相同的带宽内,给出相同的功率时,所具有的绝对温度。按照尼奎斯特定理,噪声源的噪声温度与噪声功率P之间的关系为: T=P/kΔv, 式中k为玻耳兹曼常数,Δv为频带宽度。对于接收机,可将内部噪声换算成相当于输入端引入的相应的噪声量,称为等效噪声温度 TN。它与接收机的噪声系数F的关系为: TN=TO(F-1)。 TO为环境温度;TN和F都是常用的表达接收机噪声的方式。射电望远镜的系统噪声温度TS的含义是,来自天线的噪声功率经过传输线损耗后,呈现在接收机输入处的噪声温度、传输线本身的噪声温度以及接收机等效输入噪声温度之和。
