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.

引用

页数：5

共 43 条

[41] An X-band ultra-low phase noise differential Colpitts voltage-controlled oscillator using 0.15 μm pseudomorphic high electron mobility transistor technology
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INTERNATIONAL JOURNAL OF ELECTRONICS, 2010, 97 (05) : 605 - 611
[42] An X-Band Low-Phase-Noise Class-F23 VCO Without Manual Harmonic Tuning Based on Switched-Transformer and Wideband Common-Mode Resonance
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IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 2024, 72 (05) : 3076 - 3090
[43] A X-band frequency synthesizer with 2-bit control mode is implemented in standard 0.18-μm 1P6M CMOS process. A cascoded topology of voltage control oscillator (VCO) and first stage current mode logic (CML) divider is adopted for current reuse, low power, and robust tracking between VCO and the frequency divider. The measured in-band phase noise of the synthesizer is-75.06 dBc/Hz at a frequency offset of 100 kHz and out-of-band phase noise is-119.8 dBc/Hz at a frequency offset of 10 MHz. The total power consumption is 36.75 mW. The chip size is 0.745 x 0.76mm2.
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