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用信号抵消法测量了L和S波段中功率速調管相们延迟。测量了这些波段的三腔速調管放大器的相对相位延迟与工作頻率,工作电压及前向波輸入功率的关系。L波段測量是在脉冲状态下进行的,而S波段測量则是在连续波状态下进行的。在小信号状态、接近频带的中心、第一腔和第三腔同步調諧而中間腔頻率上偏諧等条件下,測量了随工作頻率和工作电压而变化的相对相位延迟。这些結果与一般的空間电荷波理論和諧振腔理論所预断的很一致。在三个工作电压值和分布于通頻带的三个工作频率下,測量了随前向波輸入功率而变化的相对相位延迟。相位延迟近似地随輸入功率的对数变化。当功率从小信号功率变化到飽和值时,S波段速調管随前向波輸入功率所增加的相位延迟,为L波段速調管的三倍。这个結果可以解释为S波段速調管导流系数較高的緣故。L波段速調管給出了25度的相位延迟最大值,而S波段速調管给出了75度的最大值。根据已知的外部电长度和信号抵消測量,近似地求出了通过管子的相位延迟的絕对值,而这些值与小信号状态下的理論所推断出的結果一致。
The signal cancellation method was used to measure the phase delay of power tube in the L and S bands. The relative phase delay of the three-cavity klystron amplifiers in these bands was measured in relation to the operating frequency, operating voltage and input power of the forward wave. The L-band measurement is performed in the pulse state, while the S-band measurement is performed in the continuous wave state. The relative phase delay, which varies with the operating frequency and operating voltage, is measured under small signal conditions, near the center of the frequency band, simultaneous tuning of the first and third cavities, and on the middle-cavity frequency. These results are in good agreement with the general theory of space charge waves and the cavity theory. At three operating voltage levels and three operating frequencies distributed over the passband, the relative phase delay as a function of the forward power input was measured. The phase delay approximately varies with the logarithm of input power. When the power changes from a small signal power to a saturated value, the phase delay that the S-band klystron increases with the forward-wave input power is three times that of the L-band klystron. This result can be explained by the high S-band klystron conductivity factor. The L-band klystron gives a maximum phase delay of 25 degrees and the S-band klystron gives a maximum of 75 degrees. Based on the known external electrical length and signal cancellation measurements, the absolute value of the phase delay through the tube is approximately determined, and these values agree with the theoretical inference from small signal states.