Universal generation device of detection signal for microwave-like atomic clock

Abstract

The present invention provides a general detection signal generation device for microwave-like atomic clocks, including: a constant temperature voltage-controlled crystal oscillator, a clock distribution circuit, a DDS clock generation circuit, an up-conversion local oscillator circuit, an FPGA control circuit, a DDS frequency synthesis circuit, a program-controlled Attenuator and post-stage π network. The constant temperature voltage-controlled crystal oscillator outputs the crystal oscillator signal; the clock distribution circuit distributes and outputs the crystal oscillator signal to the DDS clock generation circuit, the up-conversion local oscillator circuit and the FPGA control circuit; the up-conversion local oscillator circuit generates the local oscillator signal according to the clock signal; the FPGA control circuit controls the upper The parameters of frequency conversion local oscillator circuit, DDS frequency synthesis circuit and program-controlled attenuator; DDS frequency synthesis circuit receives the multiplied clock generated by DDS clock generation circuit and generates a signal with preset timing, and the preset timing signal is mixed with the local oscillator signal Then output to the program-controlled attenuator and the subsequent π network in order to adjust the power of the detection signal fed into the microwave resonant cavity.

Description

technical field [0001] The invention relates to the field of radio frequency and digital circuits of atomic clock products used in aerospace, in particular to a generalized detection signal generating device for microwave atomic clocks. Background technique [0002] Atomic clocks are the basis for establishing time-frequency systems, and high-precision hydrogen atomic clocks have excellent short-term and medium-term stability unmatched by other time-frequency standards. In recent years, atomic clocks have been widely used in my country's military and national defense, communications, timekeeping, electric power, surveying and mapping and other fields. With the rapid development of aerospace technology, the application of atomic clocks has gradually moved from the ground to outer space. Representatively, in the Beidou navigation satellite system independently developed by my country, a variety of space-borne atomic clocks have been successfully applied in orbit, with reliabl...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a general detection signal generation device for microwave atomic clocks, so as to solve the defects that different existing atomic clocks need to be equipped with customized detection signal generation devices, and the parameter configuration is not flexible enough and the versatility is insufficient.

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