Detection signal universalization generation device for microwave atomic clock

Abstract

The invention provides a detection signal universalization generation device for a microwave atomic clock. The detection signal universalization generation device comprises 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 programmable attenuator and a post-stage pi network. The constant-temperature voltage-controlled crystal oscillator outputs a crystal oscillator signal; the clock distribution circuit distributes and outputs the crystal oscillator signals to the DDS clock generation circuit, the up-conversion local oscillator circuit and the FPGA control circuit; the up-conversion local oscillator circuit generates a local oscillator signal according to a clock signal; the FPGA control circuit controls parameters of the up-conversion local oscillator circuit, the DDS frequency synthesis circuit and the programmable attenuator; and the DDS frequency synthesis circuit receives the frequency multiplication clock generated by the DDS clock generation circuit and generates a signal with a preset time sequence, and the signal with the preset time sequence and the local oscillator signal are subjected to up-mixing and then are sequentially output to the programmable attenuator and the post-stage pi networkso as to adjust the power of a detection signal fed into a 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 exi...

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