A kind of broadband noise signal generator and its signal generating method

Abstract

The invention discloses a broadband noise signal generator and a signal generating method thereof, comprising a super-radiation light emitting diode, a filter, an optical amplifier, an optical attenuator and a single row carrier photodetector, and the output of the radiation light-emitting diode amplifies spontaneous radiation Optical signal, the amplified spontaneous emission optical signal enters the filter for filtering, the filter outputs a narrow linewidth optical signal with a preset wavelength range, and the narrow linewidth optical signal is input into the optical amplifier for amplification and then enters the The optical attenuator is used to control the power of its optical signal through the optical attenuator, and the optical signal output by the optical attenuator enters the single row carrier photodetector and converts the spectrum and the electric spectrum to output a broadband electrical noise signal . The broadband noise signal generator of the present invention has the advantages of simple structure, small overall volume and no need for refrigeration, and simultaneously solves the problem that the existing noise generator cannot meet the power required by current radars and communication devices.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a broadband noise signal generator and a signal generating method thereof. Background technique [0002] A noise generator is a device that can output uniform, continuous, definite power noise within a specific frequency band. Since noise is the most common source of interference in electronic devices and communication systems, noise generators have become a necessary test instrument in the fields of radar and communication. [0003] In recent years, scholars at home and abroad mainly use resistors, Schottky diodes and field effect transistors as the main components of noise generators to generate broadband noise. For example, using resistance as the source to generate noise, a variable temperature noise generator has been developed, the temperature range is 70K ~ 300K, and the working frequency of output noise is 90GHz ~ 100GHz, but it needs refrigeration, large volume, s...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a broadband noise signal generator and its signal generation method to solve the problem that the existing noise generator is difficult to meet the power required by current radars and communication devices.

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