一种新型感性有源可变调制相加器

用负反馈扩展频带是目前国内外广泛采用的、行之有效的办法。在研制微波调相器的调制相加器时发现,用本文提出的感性有源可变调制相加器是扩展频带的另一有效办法。就增益带宽积而论,后者比前者大得多。 本文提出的调制相加器,就带宽、无失真输出电压和对组合波的抑制而言,比美国Motorola公司研制的Goddard跟踪系统的指标高得多。用流图理论详细地分析了它的性能,并得出了一系列有用的公式。理论分析和实验曲线相当吻合。整个电路比较简单,并能在40+85℃温度范围内稳定可靠地工作。

A NEW MODULATION SUMMATOR WITH AN ACTIVE INDUCTIVE VARIABLE LOAD

Spreading band with negative feedback is a valid method that is presently widely used at home and abroad. From developing the modulation summator of microwave phase modulator, it is found that the modulation summator presented in this paper seems to bp an another valid method of spreading band. The gain-band product of the latter is much larger than that of the former.The new modulation summator preseuted in this paper has a much wider band, higher non-distorted output voltage aud better rejection capability to combined-wave than Goddard tracking system developed by Motorola Co. Its characteristics are analysed in detail with the flow-graph. A series of formulas are derived. It is found that the theoretical analysis agrees well with experimental curve. Its circuits are very simple and work stably within the temperature of 40+85℃.