High-speed broadband coherent step frequency signal generation device and method
A step frequency and signal generation technology, which is applied in the field of radar and communication, can solve the problems of frequency drift, limited working bandwidth and output frequency, step frequency discontinuity, etc., to reduce hardware complexity, facilitate miniaturization and integration, The effect of simple link structure
Active Publication Date: 2022-05-27
AEROSPACE INFORMATION RES INST CAS
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Problems solved by technology
[0003] The realization of conventional high-speed stepping frequency mainly relies on the frequency synthesizer of direct digital frequency synthesis (DDS), but its working bandwidth and output frequency are limited, generally only up to hundreds of megahertz, which cannot meet various applications such as stepping Frequency Radar Signal Bandwidth Requirements
The frequency synthesizer using the phase-locked loop circuit, its frequency switching speed can only reach the order of tens of microseconds, and usually cannot switch at a high speed.
And in other types of schemes, the step frequency is discontinuous, and there are problems such as frequency drift that cannot work stably for a long time
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[0044] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.
[0045] It should be noted that, in the drawings or descriptions in the specification, the same drawing numbers are used for similar or identical parts. The technical features in the various embodiments exemplified in the specification can be freely combined to form a new solution under the premise of no conflict. In addition, each claim can be used as an embodiment alone or the technical features in each claim can be combined as a new solution. In the drawings, the shapes or thicknesses of the embodiments may be enlarged and marked for simplification or convenience. Furthermore, elements or implementations not shown or described in the drawings are in the form known to those of ordinary skill in the art. Additionally, although examples of ...
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The invention provides a high-speed broadband coherent step frequency signal generation device and method, the device includes: microwave photon signal generation module, used to generate pulse point frequency signal and reference signal, and provide continuous wave optical carrier; regenerative feedback frequency shift module, used The continuous wave optical carrier is used to modulate the reference signal and the feedback signal respectively and delay them to generate a frequency-shifted electrical signal; the signal feedback module is used to couple the frequency-shifted electrical signal and the pulse point frequency signal to generate a feedback signal. The device realizes the generation of fast, broadband and coherent step frequency signals.
Description
technical field [0001] The present invention relates to the technical field of radar and communication, and in particular, to a device and method for generating a high-speed broadband coherent stepped frequency signal. Background technique [0002] The modern electronic environment is becoming more and more complex, which puts forward higher and higher requirements on the anti-jamming capability, resolution and reconfigurability of wireless monitoring and radar systems. As an important part of the frequency source system, how to realize the broadband fast transformation of the frequency points of the step-frequency signal source and the continuous phase after transformation has become an urgent problem to be solved. [0003] The realization of conventional high-speed stepping frequency mainly relies on the frequency synthesizer of direct digital frequency synthesis (DDS), but its working bandwidth and output frequency are limited, generally only hundreds of megahertz, which ...
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IPC IPC(8): H04B10/50H04B10/516
CPCH04B10/503H04B10/5165
Inventor 李王哲尹自强张祥鹏
Owner AEROSPACE INFORMATION RES INST CAS