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Microwave photon mirror image rejection down conversion device and method

A technology of image suppression and frequency conversion device, which is applied in the field of microwave technology and optical communication, can solve problems such as working frequency band and limited image rejection ratio, and achieve strong operability, improve image rejection ratio, and improve spectral purity.

Active Publication Date: 2017-07-18
XIDIAN UNIV
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Problems solved by technology

At present, there are a small number of microwave photon image suppression down-conversion schemes reported, but most of them use frequency-dependent devices such as microwave couplers, electric phase shifters, and dispersive devices, and their working frequency bands and image suppression ratios are still limited.

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  • Microwave photon mirror image rejection down conversion device and method
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  • Microwave photon mirror image rejection down conversion device and method

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Embodiment Construction

[0023] 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:

[0024] In this example, the device includes: LD, DPMZM, WDM, two PDs, Hybrid, two microwave signal sources, and a DC power supply. The output port of the LD is connected to the optical input port of the DPMZM through a polarization maintaining fiber, the output ports of the two microwave signal sources are respectively connected to the RF input ports of the X-MZM and Y-MZM, and the output port of the modulator is connected to the common input port of the WDM. The two output terminals are respectively connected to two PDs, and the electrical signals output by the PDs a...

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Abstract

The invention discloses a microwave photon mirror image rejection down conversion device and method; the method relates to the microwave technical field and the optical communication technical field; the device comprises a laser diode (LD), a dual-parallel Mach-Zehnder Modulator (DPMZM), a wavelength division multiplexer (WDM), a photoelectric detector (PD) and a quadrature coupler (Hybrid). The method uses the DPMZM to modulate a radio frequency (RF) signal and a local oscillator (LO) signal; the main modulator bias angle is set to be 45 degrees; the method uses the WDM to separate up and down optical margin belts, and an intermediate frequency (IF) signal inhibiting a mirror image frequency component can be obtained through photoelectric detection and Hybrid coupling. The microwave photon mirror image rejection down conversion device is simple in structure, wide in work frequency band width, and high in mirror image rejection ratio.

Description

technical field [0001] The invention relates to the field of microwave technology and the field of optical communication technology, and mainly relates to microwave photon image suppression down-conversion technology. Background technique [0002] Electronic systems such as broadband wireless communication, radar, and electronic warfare are developing in the direction of large bandwidth and wide frequency band. Microwave photonics technology processes microwave signals by means of photonics. It has a series of advantages such as large instantaneous bandwidth, wide operating frequency band, and anti-electromagnetic interference. It has great application potential in future electronic systems. [0003] In RF receivers, image frequency components must be suppressed because they interfere with the desired signal after downconversion. Traditional image rejection techniques include using image rejection filters or image rejection downconverters, the latter avoiding the use of hig...

Claims

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Application Information

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IPC IPC(8): H03D7/16H04B1/16
Inventor 高永胜文爱军蒋炜
Owner XIDIAN UNIV
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