抄録
In point-contact semi-conductor diodes which are generally used for the detection of microwave power, a new type of oscillation is generated at 9GC/sec and 35GC/sec when both amplitude and frequency of the microwave field change discontinuously. No oscillation can be observed up to frequencies of 2GC/sec. The oscillations in germanium diodes take place more easily at -60°C than at room temperature.
The oscillation frequency-differs from one diode to another, ranging from 5 KC to 30 MC. It also changes discontinuously against diode currents, indicating that there are many different modes of oscillations.
The oscillation may be originated in the immediate vicinity of the contact. It is pointed out that there are analogies in several respects between this oscillation and the moving striation in a gaseous positive column.
