High-speed broadband coherent stepping frequency signal generation device and method
A signal generation, step frequency technology, applied in the field of radar and communication, can solve the problems of limited operating bandwidth and output frequency, frequency drift, discontinuous step frequency, etc., to achieve easy miniaturization and integration, reduce hardware complexity, The effect of simple link structure
Active Publication Date: 2021-07-09
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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[0047] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0048] It should be noted that, in the drawings or descriptions of the specification, similar or identical parts all use the same figure numbers. 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. and in the drawings, the shape or thickness of the embodiments may be enlarged, and marked for simplification or convenience. Furthermore, elements or implementations not shown or described in the drawings are forms known to those of ordinary skill in the art. Additionally, while illust...
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The invention provides a high-speed broadband coherent stepping frequency signal generation device and method, and the device comprises a microwave photon signal generation module which is used for generating a pulse dot frequency signal and a reference signal, and providing a continuous wave optical carrier; a regeneration feedback frequency shift module which is used for modulating the reference signal and the feedback signal by using the continuous wave optical carrier and delaying to generate a frequency shift electric signal; and a signal feedback module, which is used for coupling the frequency shift electric signal and the pulse dot frequency signal to generate a feedback signal. According to the device, rapid, broadband and coherent stepping frequency signals can be generated.
Description
technical field [0001] The invention relates to the technical field of radar and communication, in particular to a high-speed broadband coherent step frequency signal generation device and method. Background technique [0002] The modern electronic environment is becoming more and more complex, which puts forward higher and higher requirements for the anti-interference ability, resolution and reconfigurability of wireless monitoring and radar systems. As an important part of the frequency source system, how to realize the broadband fast conversion of the frequency point of the step frequency signal source and the phase continuity after conversion 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 up to hundreds of megahertz, which cannot meet various ap...
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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