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功率微波电子管电极上的波纹电压,限制了动目标显示雷达系统的性能。当雷达采用不同的脉冲重复频率时,由于负载工作状态的变化,脉冲波纹增大。作为行波管功率放大器,阴极到管壳间电压的变化引起发射波形的相位调制和振幅调制,而动目标显示性能的降低主要原因就是相位调制。△φ(t)=K_φ△V_k(t),其中K_φ是行波管的阴极相位灵敏度,△V_k(t)是阴极电压的变化量。以加大高压电容数值的方法减少△V_k(t)是可能的,但是这样处理贮能也随之增大。串联调节器是另一种可选用的方法,但这意味着电路更加复杂,导致可靠性的降低,而且设计更费力。本文叙述高压电源的组成。它可以解决限制高压贮能问题。
The ripple voltage on the power microwave tube electrode limits the performance of the moving target display radar system. When the radar uses different pulse repetition frequency, the pulse ripple increases due to the change of the working state of the load. As the traveling wave tube power amplifier, the voltage change from cathode to the shell causes the phase modulation and amplitude modulation of the transmitted waveform. The main reason for the decrease of the moving target display performance is the phase modulation. Δφ (t) = K_φΔV_k (t), where K_φ is the cathodic phase sensitivity of the traveling-wave tube and ΔV_k (t) is the variation of the cathode voltage. It is possible to reduce ΔV_k (t) by increasing the value of the high-voltage capacitor, but this increases the stored energy. A series regulator is another option, but it means the circuit is more complex, resulting in lower reliability and harder to design. This article describes the composition of high-voltage power supply. It can solve the problem of limiting high-pressure energy storage.