A highly stable beacon source

Abstract

The invention provides a high-stability beacon source which comprises a constant temperature crystal oscillator unit, a power unit, a beacon signal selecting unit and an output unit. The constant temperature crystal oscillator unit is used for providing a high-stability beacon reference signal and comprises a first crystal oscillator and a second crystal oscillator, the power unit is used for supplying the voltage required by outputting the beacon reference signal to the constant temperature crystal oscillator unit, the beacon signal selecting unit is used for receiving a beacon selecting remote control command input from the outside world, controlling the power unit to selectively supply power to the first crystal oscillator or the second crystal oscillator and outputting the beacon reference signal of the first crystal oscillator or the second crystal oscillator, and the output unit is used for receiving the beacon reference signal output by the beacon signal selecting unit and outputting two high isolation beacon signals. The beacon reference signal output by the high-stability beacon source is high in frequency stability, the two output beacon signals are high in isolation, and the crystal oscillators for outputting can be switched and selected in real time.

Description

technical field [0001] The invention relates to the field of deep space detection, in particular to a highly stable beacon source. Background technique [0002] Deep space exploration missions mainly navigate by observing their radio signals. The three main measurement elements used are Doppler frequency, distance, and interferometer angle measurement. Due to the long distance, the delay time of sending and receiving signals is very long. Real-time remote control and Communication is no longer possible, and highly automated working methods such as program control and autonomous control must be adopted, which also brings some difficulties to system capture. Accurate speed measurement, distance measurement and angle measurement under long time delay have very high requirements on the long-term stability and short-term stability of the frequency source. Therefore, extremely stable frequency and time standards must be used, and extremely accurate time and frequency. [0003] W...

AI Technical Summary

Problems solved by technology

The time-frequency systems currently used such as hydrogen clocks and rubidium clocks have good long-term stability and high measurement accuracy, but their volume, weight, and power consumption are too large. still no advantage in the system

Ordinary constant temperature crystal oscillators are small in size, light in weight, and low in power consumption, but their frequency stability cannot meet the measurement accuracy requirements of deep space exploration, while high-stability constant temperature crystal oscillators have compromised in several aspects, and their high stability can meet the measurement accuracy requirements. , small in size, weight and power consumption, making it an ideal component for beacon sources in miniaturized deep space exploration systems

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