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本文描述了一种简单的相位测试系统,并与其他相位测试系统作了比较。这种相位测试系统用来在900—4000兆赫的频率范围内测量脉冲微波管的相位。测量误差的分析表明,相移测量的精确度在2度以内,但这种精确度只有在使用了良好稳定的电子管电源时才能达到。本文介绍了小功率行波管放大器在连续波状态下测得的相移与电子注电流、电压及激励功率的关系,并将测量结果与由线性理论推断的结果作了比较,进行比较的大部分结果符合预期的情况,只有相移与电子注电流的关系曲线的曲率方向与预期的相反。本文也介绍并讨论了对脉冲中功率行波放大器进行的相移与电子注电压、激励功率和聚焦磁场电流之间关系的测量。测量发现,由聚焦磁场增强引起的相位延迟量比预期的要高得多。
This article describes a simple phase test system and compares it with other phase test systems. This phase test system is used to measure the phase of pulsed microwave tubes in the 900-4000 MHz frequency range. Analysis of the measurement error shows that the accuracy of the phase shift measurement is within 2 degrees, but this accuracy can only be achieved when a good and stable tube power supply is used. This paper introduces the relationship between the phase shift, the injection current, the voltage and the excitation power of the low-power TWT amplifier under the condition of continuous wave, and compares the measurement results with the results deduced by the linear theory. Part of the results are in line with the expectation, with only the direction of the curvature of the curve of the relationship between the phase shift and the electron current injection as expected. This paper also introduces and discusses the measurement of the relationship between the phase shift of the pulsed mid-power traveling-wave amplifier and the electron injection voltage, the excitation power and the focusing magnetic field current. The measurement found that the amount of phase delay caused by the increase of the focus magnetic field is much higher than expected.