Broadband adaptive frequency tracking system and method

A frequency tracking and self-adaptive technology, applied in the field of radar, can solve problems such as deviation of intermediate frequency signals

Pending Publication Date: 2018-06-15
上海微抗电子技术有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to provide a wideband adaptive frequency tracking system and method to effectively solve the technical problem in the prior art that the frequency drift of the magnetron transmitter causes the deviation of the intermediate frequency signal after the receiver is mixed

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  • Broadband adaptive frequency tracking system and method

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[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation manners of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other accompanying drawings based on these drawings and obtain other implementations.

[0043] In order to make the drawing concise, the parts related to the present invention are only schematically shown in each drawing, and they do not represent the actual structure of the product.

[0044] Due to the mechanism of the magnetron transmitter itself, the frequency drift will be caused by various reasons during operation, resulting in the problem that the accuracy of the magnetron transmission frequency is poor, and it is greatly affected by factors such as time and env...

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Abstract

The invention provides a broadband adaptive frequency tracking system and a method. The system comprises an instantaneous frequency measurement module, a storage module, a control code generation module and a frequency integration module, wherein the instantaneous frequency measurement module is used for carrying out frequency measurement on a received emission pulse signal and acquiring a frequency code; the storage module is used for storing an association relation table of the frequency code and a control code; the control code generation module is connected to the instantaneous frequency measurement module and the storage module and is used for searching and generating the control code from the storage module according to the frequency code measured by the instantaneous frequency measurement module; and the frequency integration module is connected to the control code generation module and is used for generating a local oscillation signal according to the control code generated bythe control code generation module. In each repetition period of the emission pulse signal, actual intermediate frequency signals after frequency mixing of a radar receiver are in an optimum processing frequency band so that the adaptive rapid frequency tracking function of the received local oscillation signal to the emission pulse signal is realized; and receiver performance is guaranteed not tobe influenced by emission frequency drift and tactical performance of a radar integration machine is ensured.

Description

technical field [0001] The invention relates to the technical field of radar, in particular to a wideband adaptive frequency tracking system and method. Background technique [0002] Magnetron is an electric vacuum device used to generate microwave energy, which is widely used in various radars such as guidance, fire control, altimetry, airborne, shipborne, and weather. Its working principle is that the electrons in the tube interact with the high-frequency electromagnetic field under the control of the perpendicular constant magnetic field and constant electric field, and convert the energy obtained from the constant electric field into microwave energy, thereby generating microwave energy. Among them, the working pulse width of the pulsed magnetron can be changed in the range of 0.004 ~ 60μs (microseconds), the working frequency range is between 250MHz (megahertz) and 120GHz (gigahertz), and the pulse power is from tens of watts to tens of MW, the efficiency can reach 70%...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/66G01S7/285
CPCG01S7/285G01S13/66
Inventor 曹颂华奚弘佳刘昆
Owner 上海微抗电子技术有限公司
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