Low phase noise coherent transceiver front-end for X-band multichannel chirped radar based on phase-synchronous optoelectronic oscillator

被引：2
|
作者：
Gao, Yiran [1 ]
Dai, Jian [1 ]
Wu, Zhonghan [1 ]
Zhang, Tian [1 ]
Xu, Kun [1 ]
机构：
[1] Beijing Univ Posts & Telecommun, State Key Lab Informat Photon & Opt Commun, Beijing 100876, Peoples R China
来源：
OPTICS COMMUNICATIONS | 2020年 / 460卷
基金：
中国国家自然科学基金;
关键词：
Optoelectronic oscillator; Linear frequency modulation; Phase noise; Coherent radar; PHOTONIC GENERATION; WAVE-FORMS; FREQUENCY; PULSE;
D O I：
10.1016/j.optcom.2019.125194
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A coherent front-end for X-band multichannel chirped radar based on the phase-synchronous optoelectronic oscillator (OEO) with low phase noise is proposed and experimentally demonstrated. In the experiment, the pulses with an instantaneous frequency decreasing from 9.96 to 9.94-GHz are transmitting and receiving. The corresponding phase noise is about -132.1 dBc/Hz at 10-kHz offset frequency. Thanks to the direct digital synthesizer (DDS), the repetition rate and occupied bandwidth can be flexible tuned. For the simulative three-channel system, the signal-to-noise ratio (SNR) of the received signal was enhanced as 4.73-dB relative to that before pulses accumulation. The proposed method can be potentially applied in the multi-channel radar.
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页数：5
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