Multifunctional microwave photon radio frequency front-end system based on dual-polarized light IQ modulator

Abstract

The invention discloses a multifunctional microwave photon radio frequency front-end system based on a dual-polarized light IQ modulator, and belongs to the technical field of microwave photonics. The system comprises an uplink and a downlink, wherein the uplink is composed of a self-interference elimination module and a microwave photon down-conversion module, and in the uplink, the functions of self-interference elimination and signal down-conversion are realized by using an X-polarization light IQ modulator in the dual-polarization light IQ modulator; the down link is composed of a microwave photon local oscillation generation module and a microwave photon up-conversion module, and in the down link, up-conversion of signals and self-generation of LO signals are achieved through a Y polarization state light IQ modulator. The radio frequency front end system has the characteristics of multiple functions and high integration level, basically covers all the functions of the radio frequency front end, not only increases the bandwidth of the system, but also facilitates the integration of the whole system, simplifies the structure, has a self-interference elimination function, and does not influence each other even if receiving and transmitting are carried out at the same time and at the same frequency.

Description

technical field [0001] The invention belongs to the technical field of microwave photonics, and more specifically relates to a multifunctional microwave photonic radio frequency front-end system based on a dual-polarized light IQ modulator. Background technique [0002] The radio frequency front end has extensive application in the mobile communication system. The traditional RF front-end solution is mainly based on electrical components, namely low-noise amplifiers, electrical mixers, and electrical filters. Due to the limitation of working bandwidth, electrical devices can no longer meet the demand of high bandwidth. Due to the characteristics of large bandwidth and low loss of photonic devices, microwave photonic technology, which combines traditional microwave technology and photonic technology, has become a solution to this dilemma. The core idea of ​​microwave photonic technology is to use light as the carrier, use optical devices as the hardware basis, and use optic...

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a multi-functional microwave photonic radio frequency front-end system based on a dual-polarized IQ modulator, the purpose of which is to integrate the functions of up-down conversion, self-interference elimination and self-generated LO signal integration, thereby solving the technical problem of the single function of the RF front-end in the prior art

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