Apparatus of generating microwave phase coding signals in an optical manner

A phase-encoded signal and microwave signal technology, applied in phase-modulated carrier systems, electromagnetic wave transmission systems, electrical components, etc., can solve the problems of frequency adjustable range limitation, long-term working stability limitation, etc.

Inactive Publication Date: 2015-12-16
XIDIAN UNIV
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Problems solved by technology

The above methods can only generate binary phase encoding signals. In order to generate multi-ary phase encoding signals, an arbitrary waveform generation system based on photoelectric oscillators is proposed. This method can generate frequency-adjustable binary and quaternary phase encoding signals. , but

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  • Apparatus of generating microwave phase coding signals in an optical manner
  • Apparatus of generating microwave phase coding signals in an optical manner
  • Apparatus of generating microwave phase coding signals in an optical manner

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Embodiment Construction

[0032] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following The described embodiment:

[0033] see figure 1 , in this embodiment, the device includes: a laser 1, an optical splitter 2, an electric power splitter 3, an electric phase shifter 4, a dual-parallel Mach-Zehnder modulator 5, a phase modulator 6, and a first polarization controller 7. A second polarization controller 8 , a polarization beam combiner 9 , a third polarization controller 10 , a polarizer 11 , a photodetector 12 , a microwave signal source 13 , and an arbitrary waveform generator 14 . The output port of the tunable laser 1 is connected to the optical splitter 2 , and after splittin...

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Abstract

The invention discloses an apparatus of generating microwave phase coding signals in an optical manner, and relates to the microwave technology field and the optical communication technology field. The apparatus is mainly applied to generating pulse compression signals in pulse compression radar. By means of the frequency shift characteristics of two parallel Mach-Zehnder modulators, the optical wavelength modulated by coding signals and the optical wavelength after a frequency shift are coupled to each other and then are detected through a photoelectric detector, in this way, phase coding microwave signals can be generated. The apparatus can produce binary, quaternary or multi-nary phase coding microwave signals. The generated phase coding microwave signals are wide in frequency adjustable scope, and have a great time-bandwidth product. A conventional phase coding microwave signal generation mode in the electric field is restricted by the bottleneck of the rate and the bandwidth of an electronic device, and the cost of generation of high frequency signals is extremely high or high frequency signals cannot be produced, the time-bandwidth product is limited, the reconstructiblity and the frequency adjustability of a system are poor, etc. The apparatus of the invention helps to overcome the above problems.

Description

technical field [0001] The invention relates to the field of microwave technology and the field of optical communication technology, in particular to a device for optically generating microwave phase encoding signals. Background technique [0002] With the rapid development of radar technology, the requirements for radar operating range, resolution capability and measurement accuracy are getting higher and higher. The resolution theory of radar shows that: on the premise of ensuring a certain signal-to-noise ratio and achieving the best processing, the ranging accuracy and distance resolution mainly depend on the spectral structure of the signal, which requires the signal to have a large bandwidth; the speed measurement accuracy and speed resolution Depending on the temporal structure of the signal, it requires the signal to have a large duration. Therefore, in order to make the radar system have a long range and have high range and speed measurement accuracy and good dista...

Claims

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Application Information

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IPC IPC(8): H04B10/548H04L27/20
Inventor 文爱军陈阳吴晓辉陈艳刘玲
Owner XIDIAN UNIV
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