毫米波宽带调频连续波信号的全波形计量校准技术研究

何昭; 徐清华; 刘雪菲; 张亦弛

doi:10.12338/j.issn.2096-9015.2024.0126

毫米波宽带调频连续波信号的全波形计量校准技术研究

doi: 10.12338/j.issn.2096-9015.2024.0126

何昭^{1, 2,},
徐清华^{1, 2},
刘雪菲^{1, 2},
张亦弛^{1, 2, ,}

1.
中国计量科学研究院，北京 100029
2.
先进溯源技术创新中心，北京 100029

基金项目: 国家重点研发计划项目（2022YFF0604802、2022YFF0604400、2017YFF0206202）。

详细信息

作者简介:
何昭（1968-），中国计量科学研究院副研究员，研究方向：时频域全波形计量技术，邮箱：hezhao@nim.ac.cn

通讯作者:
张亦弛（1984-），中国计量科学研究院副研究员，研究方向：时频域全波形计量技术，邮箱：zhangyichi@nim.ac.cn

中图分类号: TB973
计量
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- 被引次数: 0
出版历程
- 收稿日期: 2024-04-15
- 录用日期: 2024-04-22
- 修回日期: 2024-06-04
- 网络出版日期: 2024-06-18

Full Waveform Calibration Technique for Millimeter-Wave Wideband FMCW Signals

HE Zhao^{1, 2
,},
XU Qinghua^{1, 2},
LIU Xuefei^{1, 2},
ZHANG Yichi^{1, 2
, ,}

1.
National Institute of Metrology, Beijing 100029, China
2.
Innovation Center for Advanced Traceability Technology (ICATT), Beijing 100029, China)

摘要

摘要: 为了更好地满足毫米波汽车雷达领域对调频连续波（FMCW）信号测试设备的校准需求，提升针对毫米波宽带复杂模拟调制信号的计量和测试能力，构建了频域全波形计量标准装置和被校FMCW测试设备的混合测量系统，利用二者对自定义毫米波FMCW信号的原位、同步测量，实现对商用仪表的校准和性能验证。在24 GHz和60 GHz典型毫米波雷达频段，充分对比了不同测量方法和设备的性能差异。实验结果表明，频域全波形计量方法优于相关商用仪器，在200 MHz窄带和2 GHz宽带条件下的线性调频偏差测量结果均小一个数量级，具备开展校准和性能验证的技术条件。
- 计量学 /
- 全波形计量 /
- 调频连续波 /
- 幅度校准 /
- 相位校准 /
- 频域测量
Abstract: To address the calibration needs of Frequency Modulated Continuous Wave (FMCW) signal testing equipment in millimeter-wave automotive radar applications and enhance measurement capabilities for complex analog-modulated signals in millimeter-wave broadband, we developed a hybrid measurement system. This system combines a frequency-domain full waveform metrology setup with FMCW testing equipment under calibration. By conducting in-situ, synchronous measurements of custom millimeter-wave FMCW signals, we achieved calibration and performance verification of commercial instruments. We thoroughly compared the performance of different measurement methods and equipment in the typical millimeter-wave radar frequency bands of 24 GHz and 60 GHz. Experimental results demonstrate that the frequency-domain full waveform metrology method outperforms relevant commercial instruments. The FMCW chirp deviation measurements under both 200 MHz narrowband and 2 GHz wideband conditions were an order of magnitude more precise, meeting the technical requirements for calibration and performance verification.
- metrology /
- full waveform metrology /
- frequency-modulated continuous wave (FMCW) /
- magnitude calibration /
- phase calibration /
- frequency-domain measurement

HTML全文

图 1 频域全波形计量装置原理框图

Figure 1. Block diagram of frequency-domain full waveform metrology setup for FMCW signals

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图 2 功率校准原理框图

Figure 2. Block diagram of power calibration

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图 3 相位校准原理框图

Figure 3. Block diagram of phase calibration

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图 4 线性调频瞬时频偏示意图

Figure 4. Illustration of FMCW instantaneous frequency deviation

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图 5 FMCW上变频

Figure 5. Up-conversion of FMCW signals

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图 6 FMCW测量结果的数据处理流程

Figure 6. Data processing flow for FMCW measurements

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图 7 24 GHz窄带（200 MHz）测试

Figure 7. 200 MHz narrow-band test at 24 GHz

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图 8 60 GHz宽带（2 GHz）测试

Figure 8. 2 GHz wide-band test at 60 GHz

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表 1 FMCW信号测量结果

Table 1. Measurement results of FMCW signals

调制方式	调频速率（MHz/μs）	最大频偏（MHz）	载波频率（GHz）	实测线性调频偏差（MHz）
调制方式	调频速率（MHz/μs）	最大频偏（MHz）	载波频率（GHz）	频域	时域	VSA
FMCW	125	±100	24	0.4	2.2	4.2
FMCW	1250	±1000	60	41.2	321	231

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