An ultramultiple-device microwave oscillator

1. 采用紧凑型匹配元件和适合于同轴线（带宽约为1ghz）的阻抗阶跃，研制了一种宽带六端口魔法结（MJ）。本文描述了一个由六个振子通过上述MJ和三个小型魔术T （MT）耦合而成的功率组合系统。当MJ的圆臂和每台MT的h面臂端接在反射系数为幅值3.3 ~ 0.6、相位为的电路中时，6个振子的输出在MJ.3的同轴臂处完全组合成一个负载。提出了一种可加载四个二极管的GUNN@-diode安装结构。并给出了由N座串联组成的4n器件振荡器的设计方程。此外，8、16和24器件振荡器的功率组合效率分别为95.1%、94.3%和88.3%。由两个24器件振荡器通过MT.5耦合而成的48器件振荡器系统的功率组合效率为85.5%（仅MT为99.6%）。最后，一个144器件（超多器件）振荡器系统由6个24器件振荡器、MT和MJ组成，输出功率为3.8 W，功率组合效率为78.9% （dc-RF转换效率为1.96%）。正如预期的那样，这种组合输出功率是单个设备平均输出功率（33.5mW）的100多倍（确切地说是113倍）。

1. A broadban six-port magic junction (MJ) is developed by means of a compact matching element and an impedance-step adapted to the coaxial line (the bandwidth is about 1 GHz).2. A power combining system of six oscillators coupled through the above MJ and three small-sized magic T's (MT) is described. When the circular arm of MJ and the H-plane arm of each MT are terminated in a circuit having a reflection coefficient with the amplitude of 3.3 - 0.6 and the phase of , the outputs of the six oscilators completely combine in a load at the coaxial arm of MJ.3. A GUNN@-diode mounting structure possible of loading four diodes is newly proposed. Design equations of a 4N-device oscillator consisting of a series connection of N mounts are given also. Moreover, power-combining efficiencies of 95.1 percent, 94.3 percent, and 88.3 percent are experimentally obtained with 8-, 16-, and 24-device oscillators, respectively.4. A power-combining efficiency of 85.5 percent (99.6 percent for only MT) is obtained form a 48-device oscillator system constructed of two 24-device oscillators coupled through MT.5. Finally, a 144-device (ultramultiple-device) oscillator system is assembled from six 24-device oscillators, MT, and MJ, and an output power of 3.8 W is achieved with a power-combining efficiency of 78.9 percent (a dc-RF conversion efficiency of 1.96 percent). As was expected, this combined output power is more than one hundred times (exacly 113 times) as large as the average output of the single device (33.5mW).