高超噪比微波固态噪声源设计

Design of Microwave Solid-state Noise Source with High Exceed Noise Ratio

固态噪声二极管的雪崩散弹噪声在一定条件下近似为白噪声。根据固态噪声二极管在雪崩击穿状态的等效电路，设计出与之匹配的电路结构，以实现超噪比的最大输出。在8．6～9．6 GHz．超噪比达到32～34 dB，平坦度±1dB．超噪比随温度变化小于0．01 dB／℃。

In certain conditions, avalanche shot noise originated from solid-state noise diode is similar to white noise. For maximum exceed noise ratio generated, circuit structure to match the equivalent circuit diagram of the solid-state noise diode in avalanche breakdown state has been designed. The solid-state noise source exhibits frequency range 8.6-9.6 GHz, exceed noise ratio 33± dB. The exceed noise ratio varied with temperature is less than 0.01 dB/℃.