A Two Sweeping VCO Source for Heterodyne FMCW Radar

被引：22

作者：

Dao, Manh-Tuan ^{[1
]}

Shin, Dong-Hun ^{[1
]}

Im, Yun-Taek ^{[1
]}

Park, Seong-Ook ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Elect Engn, Microwave & Antenna Lab, Taejon 305732, South Korea

来源：

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 2013年 / 62卷 / 01期

基金：

新加坡国家研究基金会;

关键词：

Direct digital synthesizer (DDS); frequency-modulated continuous wave (FMCW); heterodyne; linearity; phase-locked loop (PLL); radar; IMAGING RADAR; PHASE; PLL; DESIGN; SYSTEM; LOOP; GHZ;

D O I：

10.1109/TIM.2012.2212510

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We propose and develop a heterodyne frequency modulated continuous wave (FMCW) radar system. The system operates at 14 GHz with a 500-MHz bandwidth in a 100-mu s sweeping period, based on two wideband linear RF voltage-controlled oscillator (VCO) sweeping sources, which are controlled by a direct digital synthesizer (DDS) through a phase-locked scheme, leading to a high linearity of the frequency chirping signal. To achieve low phase noise, the RF signals are synthesized from low-noise baseband signals which are generated through a generation scheme of using phase-locked oscillators operating in the 800-MHz frequency range. Additionally, the proposed architecture can eliminate the phase noise contributions and/or frequency deviation due to the uncorrelation of different VCOs. The results are verified through measurements and derivation.

引用

页码：230 / 239

页数：10

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