论文部分内容阅读
现有的偏转调制放大器(偏调管)一般都是低增益(小于25分贝)并利用磁场进行偏转。在本文中,我们考虑用电子偏转并采用由几个更普通的非耦合腔体构成偏转系统。这可使增益有明显的增加(可与速调管相比拟),并且不再需要像原先在磁偏调放大器中所用的、体积庞大的直流偏转磁铁。试验了两种不同类型的电偏转腔体。测出了许多腔体中的偏转阻抗和场分布。测量表明,电偏转腔体所具有的有效偏转阻抗要比磁偏转腔体大5～50倍。文中研究了依据相对论电子束公式的多腔偏转理论和麦克斯韦场方程的一阶展开式。由计算机计算得到的大量数据表明,采用多腔偏转系统的高增益偏转调制高频放大器是可行的。三腔器件的典型增益达50～55分贝。
Existing deflection modulation amplifiers (triacs) are generally low gain (less than 25 dB) and are deflected using a magnetic field. In this paper, we consider the use of electronic deflection and the use of several more common non-coupling cavity deflection system. This gives a significant increase in gain (comparable to klystrons), and eliminates the need for bulky DC deflection magnets as was previously used in magnetic offset amplifiers. Two different types of electrical deflection chambers were tested. Deflection impedances and field distributions were measured in many cavities. The measurement shows that the effective deflection impedance of the electrical deflection cavity is 5 to 50 times larger than that of the magnetic deflection cavity. In this paper, the multi-cavity deflection theory based on the relativistic electron beam formula and the first-order expansion of Maxwell field equation are studied. The large amount of data calculated by the computer shows that it is feasible to use a high-gain deflection modulated HF amplifier with a multi-cavity deflection system. The typical gain of the three cavity device reaches 50- 55 decibels.