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偏离载波
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  “偏离载波”译为未确定词的双语例句
     The noise behavior of the oscil-lator is also proved to be superior to a klystron 70V10 in the same band. When it has adeviation of 30MHz from the carrier,the mean square root frequency deviation of FM noisein a bandwidth of 100Hz is: △f_(rms)=2Hz,while for a klystron 70V10 it would be-△f_(rms)=9Hz.
     振荡器噪声特性优于同频段速调管70V10.偏离载波30MHz时,100Hz带宽内,FM 噪声的均方根频偏△frms=2Hz,而速调管为△frms=9HZ.
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     The phase noise of the phase-lockedoscillator with analogue phase detectors is -77dBc/Hz at 10kHz offset.
     在此基础上研制的W波段模拟锁相源在偏离载波10kHz处的相位噪声达到-77dBc/Hz;
短句来源
     According to the verification results,the assembly exhibits the noise figure of less than 5dB over 1GHz frequency range,and the single-sideband phase noise (200kHz offset from carrier frequency) of -70dBc/Hz.
     根据测试结果,该下变频器的噪声系数在35GHz处1GHz频率范围内小于5dB,单边带相位噪声系数在偏离载波200kHz处达到-70dBc/Hz.
短句来源
     The frequency synthesizer has been integrated on one chip in 0.18μm CMOS process,the simulated results show the frequency synthesizer has a 14kHz loop bandwidth and a high spectrum purity,the maximum in-band phase noise is -106dBc/Hz,the phase noise is lower than -120dBc/Hz at 100kHz offset,and the frequency synthesizer has a fast settling time which is about 160μs.
     该频率合成器已经采用0.18μmCMOS工艺实现,仿真结果表明,该频率频率合成器的环路带宽约为14kHz,最大带内相位噪声约为-106dBc/Hz; 在偏离载波频率100kHz处的相位噪声小于-120dBc/Hz,具有很高的频谱纯度.
短句来源
     Phase noise characteristics of both oscillators are analyzed in detail. Measurement results are given and compared with each other. The DRO shows an ultra low-phase noise performance:–110 dBc/Hz at 10kHz offset and–120 dBc/Hz at 100kHz offset.
     DRO相位噪声性能优越,在偏离载波10kHz处达到–110dBc/Hz,偏离载波100kHz处优于–120dBc/Hz,输出功率达到7.8dBm,满足卫星通信的应用要求。
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  相似匹配句对
     Departure
     偏离
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     Reason and Deviation
     理性与偏离
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     Automatic analysis of holographic interference photo-carrier fringe patterns
     载波全息干涉图的自动分析
短句来源
     Inspection of the powerline carrier channel
     电力线载波通道的检查
短句来源
     The phase noise of the phase-lockedoscillator with analogue phase detectors is -77dBc/Hz at 10kHz offset.
     在此基础上研制的W波段模拟锁相源在偏离载波10kHz处的相位噪声达到-77dBc/Hz;
短句来源
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  offset carrier
The constant envelope Alternate Binary Offset Carrier (ALTBOC) modulation was chosen as the solution to transmit the Galileo E5 band signal.
      
Another important research direction might be frequency offset carrier synchronization using SMF.
      


This article presents the design parameters of the 4mm Si P~+NN~+ type avalanche diode,the manufacturing of the diode,the structure of the microwave oscillator and some considera-tions of its design.It gives some important electrical parameters of the extra reflective cavitystabilized IMPATT oscillator,which are theoretically estimated from an equivalent circuit.Italso gives a study on the behavior of the oscillator and its noise through a series of experiments. The experiments show that the extra cavity stabilized...

This article presents the design parameters of the 4mm Si P~+NN~+ type avalanche diode,the manufacturing of the diode,the structure of the microwave oscillator and some considera-tions of its design.It gives some important electrical parameters of the extra reflective cavitystabilized IMPATT oscillator,which are theoretically estimated from an equivalent circuit.Italso gives a study on the behavior of the oscillator and its noise through a series of experiments. The experiments show that the extra cavity stabilized oscillator operates on a frequencyrange of 70-80GHz with an output power of over 20mW (maximal power-160mW) andan efficiency of about 1-2% (maximal efficiency-3.8 %).The noise behavior of the oscil-lator is also proved to be superior to a klystron 70V10 in the same band. When it has adeviation of 30MHz from the carrier,the mean square root frequency deviation of FM noisein a bandwidth of 100Hz is: △f_(rms)=2Hz,while for a klystron 70V10 it would be-△f_(rms)=9Hz.The frequency stability of the oscillator is about 3.6×10~(-7)/minute,1.83×10~(-5)/hour,5×10~(-4)/200hours,which is also better compared to a klystron.

本文给出了4mm硅P~+NN~+型雪崩二极管的参数设计,简述了二极管的制作工艺过程、微波振荡器结构和设计考虑.从等效电路在理论上预计了反射式外腔稳定的IMPATT振荡器的几个重要电学参数.实验研究了振荡器及其噪声特性. 实验表明,外腔稳定的IMPATT振荡器工作频率范围为70—80GHz,输出功率大于20mW(最大为160mW),效率为1—2%(最大为3.8%).振荡器噪声特性优于同频段速调管70V10.偏离载波30MHz时,100Hz带宽内,FM 噪声的均方根频偏△frms=2Hz,而速调管为△frms=9HZ.振荡器稳定度为 3.6 ×10~(-7)/分,1.8 ×10 ~(-5)/小时,5 × 10~(-4)/200 小时,也优于速调管.

This paper first describes the fundamentals of two-port phase noise measurement for microwave amplifiers and other devices. On the basis of the fundamental circuit, we have set up a highly sensitive phase noise measurement system, which contains a carrier suppression circuit, a phase modulation signal generation circuit, an appropriate exciting source and a set of advanced test equipment. The operating frequencies of the system are at 3cm band. The system can be used to measure the residual phase noise of amplifiers...

This paper first describes the fundamentals of two-port phase noise measurement for microwave amplifiers and other devices. On the basis of the fundamental circuit, we have set up a highly sensitive phase noise measurement system, which contains a carrier suppression circuit, a phase modulation signal generation circuit, an appropriate exciting source and a set of advanced test equipment. The operating frequencies of the system are at 3cm band. The system can be used to measure the residual phase noise of amplifiers under test which can be operated under the condition of CM and PM. The background noise of the syste-m is less than-130dBc/Hz at 1kHz offset frequency.

该系统是在二端口器件相位噪声测试原理电路的基础上加入载波抑制电路和调相校准信号形成电路而组成,具有合适的激励源和先进的测试终端。该系统工作在3cm波段,能测定连续波工作状态下及脉冲工作状态下被测放大管的剩余相位噪声,在偏离载波频率1KHz处的本底噪声小于-130dBc/Hz。

According to the idea of extracting harmonic power while phase locking the fundamental,a phase locked W band second harmonic two port Gunn oscillator is developed, with two phase locked loops. The relationship of phase shaking between the signals of millimeter wave and intermediate frequency is analyzed. Meanwhile the limitation of phase noise determined by internal phase locked intermediate frequency is pointed out. The phase locked oscillator, whose output power is over 10 mW and phase noise is -70...

According to the idea of extracting harmonic power while phase locking the fundamental,a phase locked W band second harmonic two port Gunn oscillator is developed, with two phase locked loops. The relationship of phase shaking between the signals of millimeter wave and intermediate frequency is analyzed. Meanwhile the limitation of phase noise determined by internal phase locked intermediate frequency is pointed out. The phase locked oscillator, whose output power is over 10 mW and phase noise is -70 dBc/Hz @50 kHz, may be use as local oscillator or others.

根据基波锁相、谐波提取的思想,采用双环数字锁相方式,实现了W 波段二次谐波耿氏锁相振荡器;分析了混频锁相环中输出端口与中频端口相位抖动的关系,指出了从自身中频端口测试相噪的局限性。该锁相源频率为93 GHz,射频偏离载波50 KHz 时,相噪为- 70 dBc/Hz ,输出功率大于10 m W,可用于本振等小功率场合

 
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