Abstract:
A phase locking arrangement in which a free-running oscillator running with a frequency fo is injection phase locked by a synchronizing oscillator with a free-running frequency fs and a multiplier giving a multiplied frequency n . fs. A modulating frequency fm modulates both the free-running oscillator and the synchronizing oscillator through two direct coupled FMmodulators, so that the free-running oscillator will be continuously tuned to a frequency f1 which is chosen so that the synchronizing band Delta f f1 - fo of the free-running oscillator is narrow, so that the synchronizing power from the synchronizing oscillator can be kept low.
Abstract translation:一种锁相装置,其中以频率fo运行的自由振荡的振荡器通过具有自由运行频率fs的同步振荡器和产生倍频n的乘法器被注入锁相。 fs。 调制频率fm通过两个直接耦合的FM调制器对自由振荡器和同步振荡器进行调制,使得自由振荡器将被连续调谐到频率f1,频率f1被选择为使得同步带DELTA f = f1 自由振荡器的fo较窄,使得来自同步振荡器的同步功率可以保持较低。
Abstract:
A variable waveguide impedance for the measurement of an active microwave element, for example in order to obtain a value of the figure of merit of the element, comprises a non-reflecting terminator consisting of two pyramidal parts mounted on a yoke which in turn is mounted on a first hollow shaft, and a shortcircuit device consisting of two metallic cylinders mounted on a second shaft. The second shaft is displaceable and lockable in the first shaft and the whole impedance device is arranged in a waveguide section in relation to which the impedance can be displaced by means of the first shaft. The active microwave element is connected to the waveguide section in order to establish a microwave field in the same.