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The singletuned the worst error probability performance, the Gaussian spectrum w a s in the middle andthe spec trum had the least severe effect.


The passive filter is a threephase singletuned filter to the 7thharmonic frequency with a quality factor of Q = 22.


The output diodes see a square wave of current but a sinusoidal voltage, as expected from a single tuned converter.


Figure 19 shows experimental waveforms with a dc load rated at 15 kW when the singletuned passive filter was used alone.


Experimental waveforms with a dc load rated at 15 kW when the singletuned passive filter was used alone 7.3.




 Some supplementations, unifications, and simplifications of the problem of optimum bandwidth of a filter approximately matched to highfrequency pulsed signal were made in this paper.For a filter approximately matched to a single rectangular highfrequency pulse, the case for a linear system with rectangular freguency characteristic detuned with respect to the rectangular highfrequency signal was discussed and the formula for calculating the optimum bandwidth of the system was obtained.For the case... Some supplementations, unifications, and simplifications of the problem of optimum bandwidth of a filter approximately matched to highfrequency pulsed signal were made in this paper.For a filter approximately matched to a single rectangular highfrequency pulse, the case for a linear system with rectangular freguency characteristic detuned with respect to the rectangular highfrequency signal was discussed and the formula for calculating the optimum bandwidth of the system was obtained.For the case of pulse trains with uniform amplitudes, simplification and unification of some results of the other authors were made, it was pointed out that there exists a simple relation between the optimum value of attenuation of the delayed feedback system with unlimited bandwidth and the optimum teethwidth of a comb filter with singletuned characteristic of the teeth. The comparison between these two systems was made by the use of the data of the other authors.For the case of rectangular pulse trains with nonuniform amplitudes, the accumulation of the rectangular pulse trains with trapezoidal envelope by the delayed feedback system with finite bandwidth was discussed, and formula of the signal to noise ratio at the output terminals was obtained. For finding the optimum bandwidth of the delayed feedback system, some numerical calculations were made, and curves of the signal to noise ratio with respect to the bandwidth were plotted. From these curves we found that in this case there exists an optimum bandwidth of the system, the value of which is wider then the optimum bandwidth of the system in the case of accumulation of rectangular pulse trains with uniform amplitudes.  本文对高频脉冲讯号近似匹配滤波器的最佳通频带问题,作了一些补充、统一和简化。 对单个矩形高频脉冲的近似匹配滤波器,本文讨论了矩形高频脉冲在失谐的情况下通过矩形频率特性系统时的最佳通频带,得出了计算公式。 对于等幅矩形脉冲串的情形,本文将前人的一些结果在计算方面作了简化和统一。明确指出了有衰减但频带不受限制的延时反馈系统的最佳衰减值和具有单谐振回路特性梳齿的梳形滤波器的最佳梳齿通频带间的对应关系,并用文献上的数据作了比较。 对于非等幅矩形脉冲串的情形,本文讨论了频带有限的延时反馈系统对包迹为梯形的矩形脉冲串进行积累的情形,得出了输出端讯噪比的表示式。为了求得最佳通频带,进行了一些数字计算,作出曲线。从曲线中得到这一系统对包迹为梯形的矩形脉冲串积累时,存在有最佳通频带,它的宽度比对等幅矩形脉冲串积累时的最佳通频带为宽。  A Singletuned Gunn diode oscillator is described, which is similar to Kurokawa circuit, except that resonant cavity empleys H011 mode highQ cylindrical cavity. The load variation has small effect on oscillator frequency, thus avoiding the frequency jump generally occuring in reflectioncavitystabilied oscillators when load or temperature varies. The noise level of this oscillator is even lower than that of other oscillators. With proper choice of parameters for the oscillator circuit, the oscillator... A Singletuned Gunn diode oscillator is described, which is similar to Kurokawa circuit, except that resonant cavity empleys H011 mode highQ cylindrical cavity. The load variation has small effect on oscillator frequency, thus avoiding the frequency jump generally occuring in reflectioncavitystabilied oscillators when load or temperature varies. The noise level of this oscillator is even lower than that of other oscillators. With proper choice of parameters for the oscillator circuit, the oscillator output power of 3010bmW can be obtained with its efficiency of 4060%, and mechanically tunable bandwidth greater than 600MHz. Different material for main cavity and tunable piston of the oscillator are adopted for temperaturecompensation. The temperature cycling is conducted in the range of 40℃ to +70℃. As a consequecy, the frequency temperature coefficient is better than 0.08MHz/℃ and the power stability 0.022dB/℃.  本文报导了一种单调谐体效应振荡器.该振荡器结构类似于Kurkoawa电路.但谐振腔采用H_(011)高Q圆柱腔.该振荡器电路负载变化对振荡频率影响较小,能够避免通常反射腔稳频振荡器受到负载变化可能出现跳频的缺点.而且噪声电平比其它振荡源要小.对电路参数经过适当选择后,振荡器的输出效率能达到40～60%,输出功率30～100mW.机械牵引带宽大于600MHz.该振荡器的主腔和调谐活塞采用线胀系数不同的材料进行温度补偿.当温度循环在40℃至+70℃的范围内,频率温度系数一般优于0.08MHz/℃,功率稳定度优于0.022dB/℃.  AC filters normally consist of a certain number of single tuned filter for several lower harmonics and a highpass filter for higher harmonics. In case that the harmonic impedance characteristics of the system has been fixed, the harmonic filtering efficacy of the single tuned filter will depend not only on the capacitance (C), but also on L and R values of the filter. The highpass filter has a feature similar to the above mentioned filter. Further, a method to design filters is described which... AC filters normally consist of a certain number of single tuned filter for several lower harmonics and a highpass filter for higher harmonics. In case that the harmonic impedance characteristics of the system has been fixed, the harmonic filtering efficacy of the single tuned filter will depend not only on the capacitance (C), but also on L and R values of the filter. The highpass filter has a feature similar to the above mentioned filter. Further, a method to design filters is described which can get optimum harmonics filtening efficacy for the electric power system.  本文论述最佳滤波效益的无源型交流滤波装置的设计方法。   << 更多相关文摘 
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