A non-return-to-zero pulse signal generation method with precise adjustment of top and bottom power

Abstract

The invention discloses a non-return-to-zero pulse signal generation method whose top and bottom power can be precisely adjusted, which includes the steps: a. The radio frequency continuous wave signal first passes through a 3dB quadrature hybrid coupler or a power divider plus a 90° phase shifter to generate two Two-way orthogonal radio frequency signals are loaded to the local oscillator ports of the two-way mixers respectively; b. Control the IQ baseband signal generator to generate the quadrature IQ baseband signals required for modulation, which are respectively input to the radio frequency ports of the two-way mixers, The local oscillator signal is modulated, and by continuously changing the scalar amplitude value of the IQ baseband signal, a non-return-to-zero pulse modulation excitation signal with a precisely adjustable top and bottom power required for micro-discharge effect detection is generated. The present invention uses a broadband IQ vector modulator combined with IQ baseband signal generation to realize the generation of non-return-to-zero pulse modulation signals with high-precision, high-reliability, and low-cost methods that can precisely adjust the top-bottom power and ensure the high-power excitation signal power required for the test. Accuracy, while reducing the detection cost of micro-discharge effects, improve system reliability.

Description

technical field [0001] The invention belongs to the technical field of testing and relates to a method for generating a non-return-to-zero pulse signal whose top and bottom power can be precisely adjusted. Background technique [0002] The micro-discharge effect, also known as the secondary electron multiplication effect, refers to the secondary electron emission and multiplication effect excited by free electrons between two metal surfaces or on the surface of a single medium under the acceleration of an external radio frequency field under vacuum conditions. This vacuum resonance discharge phenomenon is a very important factor affecting the reliability of space electronic equipment. [0003] The microdischarge effect mainly occurs in the radio frequency, microwave, and millimeter wave systems of the spacecraft. A spacecraft that works normally in space orbit will be affected by factors such as external high-energy plasma, high-vacuum environment, its own structure size, t...

AI Technical Summary

Problems solved by technology

[0008] 1. High cost: At this stage, it is necessary to develop a dedicated pulse modulator, which increases the construction cost of the micro-discharge effect detection system;

[0009] 2. Low reliability: According to the calculation method of the reliability of the whole machine or system, its reliability prediction value depends on the reliability of each component or functional unit that constitutes the whole machine or system. The greater the number of components, the more reliable the whole machine or system is. the lower the sex

Images