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Photon microwave down conversion device and method

A technology of photonic microwave and frequency conversion devices, which is applied in the fields of equipment for generating/processing RF signals through optical methods, optical fiber transmission, optical fiber radio, etc., and can solve problems such as poor radio frequency isolation, difficult flexible tuning, and complex structure of microwave down-conversion systems , to achieve the effect of complete radio frequency isolation and flexible regulation

Active Publication Date: 2018-04-20
DALIAN UNIV OF TECH
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Problems solved by technology

[0007] The invention provides a photonic microwave down-conversion device and method, which can effectively solve the problems of complex structure, poor radio frequency isolation, and difficulty in flexible tuning of the microwave down-conversion system in the background art.

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  • Photon microwave down conversion device and method

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Embodiment Construction

[0039] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings and technical solutions.

[0040] figure 2 It is a system block diagram of a photonic microwave down-conversion device according to an embodiment of the present invention, including a wavelength-tunable laser, an electro-optic modulator, an optical narrowband notch filter, an optical splitter, a polarization beam splitter, an optical fiber a, an optical fiber b, and a polarization beam combiner , a first photodetector, an electrical combiner, and a second photodetector.

[0041] The wavelength tunable laser, electro-optic modulator, optical narrow-band notch filter, optical splitter, polarization beam splitter, optical fiber a, optical fiber b, polarization beam combiner and first photodetector are sequentially connected through optical fiber.

[0042] The lengths of the optical fiber a and the optical fiber b are different;

[00...

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Abstract

The invention discloses a photon microwave down conversion device and method, and belongs to the technical field of microwave signal processing. In the device, an electro-optic modulator, an optical narrow band notch filter, a photoelectric detector and an electric mixer form an oscillating loop, the device has a function of generating microwave local oscillation, and the frequency of a local oscillation signal can be flexibly adjusted by changing the frequency of output optical waves of a variable length adjustable laser. Due to a phase modulation function of the electro-optic modulator, a radio frequency signal is output from an output end of the down conversion photoelectric detector, thus having complete radio frequency isolation advantages. The down conversion device has flexible regulation and control ability, can not only perform down conversion on the radio frequency signals with different frequency to intermediate frequency signals with the same frequency, but also can performdown conversion on the same radio frequency signal to the intermediate frequency signals with different frequency. The photon microwave down conversion device solves the problems of complex structure, poor radio frequency isolation, flexible tuning difficulty and the like of microwave down conversion in the prior art.

Description

technical field [0001] The invention belongs to the technical field of microwave signal processing, and in particular relates to a photonic microwave down-conversion device and method. Background technique [0002] Microwave down-conversion is one of the key technologies of microwave signal processing. Its function is to change the frequency domain of the microwave signal received by the antenna, and reduce the frequency to a processable intermediate frequency band. Microwave down-conversion technology has extensive and important applications in satellite communication, wireless communication, radar and other fields. The traditional microwave down-conversion technology based on electrical methods is mainly realized through the nonlinear characteristics of electronic devices such as diodes or FETs. The frequency range and bandwidth of frequency conversion processing are limited by the performance of electrical devices. With the increase of microwave frequency , the frequency...

Claims

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Application Information

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IPC IPC(8): H04B10/2575H04B10/50H04J14/06
CPCH04B10/2575H04B10/5057H04J14/06H04B10/00H04B2210/006H04B10/548H04B10/616
Inventor 韩秀友邵宇辰武震林赵明山
Owner DALIAN UNIV OF TECH
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