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A broadband 360° tunable microwave signal phase shifting device and method

A microwave signal and phase-shifting technology, applied in electromagnetic wave transmission systems, electrical components, transmission systems, etc., can solve problems such as reducing the stability of phase-shifting signals, increasing the complexity, and limiting the operating frequency range, achieving convenient control and phase-shifting. The effect of strong stability and simple device structure

Active Publication Date: 2019-09-10
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the phase shifting of the microwave signal is realized by the above method, an additional optical modulator or optical filter is often required, which will greatly increase the complexity of the system. If an optical filter is used, it will also limit the microwave photon phase shifter. operating frequency range, reducing the stability of the resulting phase-shifted signal

Method used

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  • A broadband 360° tunable microwave signal phase shifting device and method
  • A broadband 360° tunable microwave signal phase shifting device and method
  • A broadband 360° tunable microwave signal phase shifting device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0055] In this embodiment, the wavelength of the optical signal output by the laser is 1550.55 nm. Adjust the DC bias voltage so that the two sub-MZMs of the sub-DP-MZM that input the microwave signal at the RF input port are biased at the minimum transmission point, and the main MZM is biased at the orthogonal transmission point; make the sub-DP of the RF input port input the DC signal - The two sub-MZMs of the MZM are respectively biased at the maximum transmission point and the minimum transmission point, and the main MZM is biased at the orthogonal transmission point. In this embodiment, the frequency of the input microwave signal is 10 GHz. figure 2 (a) is the spectrogram of the DP-MZM output optical signal of the input microwave signal. It can be seen that the suppressed carrier single sideband modulation has been realized. Except for one first-order optical sideband, the rest of the optical sidebands are well suppressed , the rejection ratio is greater than 36.28dB; ...

Embodiment 2

[0057] In this embodiment, the wavelength of the optical signal output by the laser is 1550.55 nm. Adjust the DC bias voltage so that the two sub-MZMs of the sub-DP-MZM that input the microwave signal at the RF input port are biased at the minimum transmission point, and the main MZM is biased at the orthogonal transmission point; make the sub-DP of the RF input port input the DC signal - The two sub-MZMs of the MZM are respectively biased at the maximum transmission point and the minimum transmission point, and the main MZM is biased at the orthogonal transmission point. In this embodiment, the frequency of the input microwave signal is 18 GHz. Figure 4 (a) is the spectrogram of the DP-MZM output optical signal of the input microwave signal. It can be seen that the suppressed carrier single sideband modulation has been realized. Except for one first-order optical sideband, the rest of the optical sidebands are well suppressed , the rejection ratio is greater than 29.82dB; ...

Embodiment 3

[0059] In this embodiment, the wavelength of the optical signal output by the laser is 1550.55 nm. Adjust the DC bias voltage so that the two sub-MZMs of the sub-DP-MZM that input the microwave signal at the RF input port are biased at the minimum transmission point, and the main MZM is biased at the orthogonal transmission point; make the sub-DP of the RF input port input the DC signal - The two sub-MZMs of the MZM are respectively biased at the maximum transmission point and the minimum transmission point, and the main MZM is biased at the orthogonal transmission point. In this embodiment, the frequency of the input microwave signal is 23 GHz. Image 6 (a) is the spectrogram of the DP-MZM output optical signal of the input microwave signal. It can be seen that the suppressed carrier single sideband modulation has been realized. Except for one first-order optical sideband, the rest of the optical sidebands are well suppressed , the rejection ratio is greater than 28.47dB; ...

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Abstract

The invention relates to a broadband 360-degree tunable microwave signal phase shifting device and method. The device comprises a laser, a polarization multiplexing dual-parallel Mach-Zehnder modulator, namely a DP-QPSK modulator, a microwave signal generator, a 90-degree mixer, a DC power supply, a polarization controller, a polarizer, an optical amplifier and a photoelectric detector. The modulation characteristic of a suppressed carrier single sideband of one dual-parallel Mach-Zehnder modulator (DP-MZM) of the DP-QPSK modulator is utilized to generate a first-order optical sideband, and the first-order optical sideband is coupled to an optical carrier signal output by the other DP-MZM in the DP-QPSK modulator; through adjustment of the phase of the optical carrier signal, the coupled optical signal is detected through the photoelectric detector, so that the microwave signal at any phase can be generated, and the phase shifting of the microwave signal is realized. Through the deviceand the method, the phase shifting of the microwave signal is realized, and the defects of limited bandwidth and poor phase tenability of the conventional electronic phase shifter are overcome.

Description

technical field [0001] The invention relates to a broadband 360° tunable microwave signal phase shifting device and method, belonging to the technical field of microwave signal processing. Background technique [0002] As a key device for microwave signal processing, microwave phase shifters have important applications in satellite communications, wireless communications, radar systems, aerospace and other fields. The traditional microwave phase shifter is composed of electronic components, which are limited by the bandwidth and response speed of electronic components. The traditional electronic microwave phase shifter has a small working bandwidth, limited phase shift range, and poor anti-electromagnetic interference ability. , has become more and more difficult to meet the performance requirements in modern microwave signal processing. [0003] A microwave photonic phase shifter is a device that processes microwave signals in the optical domain and finally realizes phase ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/548H04B10/516
Inventor 陈阳
Owner EAST CHINA NORMAL UNIV
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