Error analysis of microwave power measurement instruments
-
摘要: 在微波测量领域，功率计、示波器、检波器和矢量网络分析仪都是常用测量器件，其使用过程中引入的误差对实验结果的准确性有直接的影响。在描述了功率计、示波器、检波器和矢量网络分析仪在微波功率测量领域的使用方法的基础上，分析对比了一些典型型号的测量器件在不同测量条件下引入的测量误差。实验结果表明：检波器测得的功率比示波器测得的功率最大大0.4 dB。示波器的不同带宽抑制对功率测量最大相差0.3 dB。N9917矢量网络分析仪比AV3672矢量网络分析仪在频率4 GHz，衰减器衰减幅值为60 dB时测得的功率大1 dB。Abstract: Power meters, oscilloscopes, detectors, and vector network analyzers are commonly used in microwave measurements. The introduced errors by these instruments have direct impact on the measurement accuracy. In this paper, the measurement methods of power meters, oscilloscopes, detectors, and network analyzers are described, based on which the introduced errors by the typical measurement instruments under different measurement conditions are analyzed. The experiment results demonstrate that the measured power by the detectors is at most 0.4 dB bigger than that by the oscilloscope. The maximum difference of the measured power by the oscilloscope under different suppression bandwidths is 0.3 dB. The measured power by the vector network analyzer N9917A is 1 dB bigger than that by the analyzer AV3672 at 4 GHz with the attenuation of 60 dB.
-
Key words:
- microwave measurement /
- power meter /
- oscilloscope /
- detector /
- vector network analyzer /
- error
-
图 2 不同采样率和带宽抑制对示波器功率测量的影响
Figure 2. Influence of sampling rate and bandwidth limitations on oscilloscope based power measurements
图 3 不同标定条件下检波器功率和幅值对应曲线
Figure 3. Corresponding curves of power and amplitude of geophone under different calibration conditions
图 4 检波器和示波器功率测量对比原理图
Figure 4. Schematic diagram of power comparison between detectors and oscilloscope
图 5 检波器和示波器功率测量对比结果图
Figure 5. Comparison results of power measurement between detectors
图 6 功率计和示波器对功率测量原理图
Figure 6. Schematic diagram of power comparison between power meters and oscilloscope
表 1 N9917和AV3672在不同频率下对比实验结果
Table 1. Experimental results of vector network analyzers N9917 and AV3672 at different frequencies
analyzer S12/dB attenuator 20 dB attenuator 40 dB attenuator 60 dB f=1.5 GHz f=4 GHz f=1.5 GHz f= 4 GHz f=1.5 GHz f=4 GHz N9917 19.76 20 39.6 40.1 59.06~60.17 59.33~61.22 AV3672C 19.69 19.88 39.55 39.85 58.61~59.44 58.92~60.02 
下载: 导出CSV
-
[1] 舒挺, 王勇, 李继建, 等. 高功率微波的远场测量[J]. 强激光与粒子束, 2003, 15(5): 142-145. http://www.hplpb.com.cn/article/id/137Shu Ting, Wang Yong, Li Jijian, et al. Measurement of high power microwaves in the far-field zones. High Power Laser and Particle Beams, 2003, 15(5): 142-145 http://www.hplpb.com.cn/article/id/137 [2] 王宏军, 黄文华, 刘国治. 几种高功率微波频率诊断方法[J]. 微波学报, 2001, 17(1): 62-66. https://www.cnki.com.cn/Article/CJFDTOTAL-WBXB200101012.htmWang Hongjun, Huang Wenhua, Liu Guozhi. Several methods for high power microwave frequency diagnosis. Journal of Microwaves, 2001, 17(1): 62-66 https://www.cnki.com.cn/Article/CJFDTOTAL-WBXB200101012.htm [3] 汤世贤. 微波测量[M]. 北京: 国防工业出版社, 1991.Tang Shixian. Measurement of microwaves. Beijing: National Defense Industry Press, 1991 [4] Kancleris Z. Resistive sensor for short HPM pulse measurement[R]. Vilnius: Semiconductor Physics Institute, 1998. [5] 张黎军, 陈昌华, 腾雁, 等. 高功率微波常用测量器件标定方法研究[J]. 微波学报, 2016, 32(5): 60-64. https://www.cnki.com.cn/Article/CJFDTOTAL-WBXB201603014.htmZhang Lijun, Chen Changhua, Ten Yan, et al. Research on the calibration methods of HPM measuring elements. Journal of Microwavs, 2016, 32(5): 60-64 https://www.cnki.com.cn/Article/CJFDTOTAL-WBXB201603014.htm [6] 李松. 毫米波检波器研制[D]. 成都: 电子科技大学, 2008.Li Song. The investigation on millimeter microwave detector. Chengdu: University of Electronic Science and Technology of China, 2008 [7] 晏峰, 崔新红, 李治国, 等. X波段高功率微波辐射场测量角锥天线特性[J]. 强激光与粒子束, 2011, 23(11): 3145-3148. http://www.hplpb.com.cn/article/id/5509Yan Feng, Cui Xinhong, Li Zhiguo, et al. Characteristics of pyramidal horn used in HPM radiation field measurement at X-band. High Power Laser and Particle Beams, 2011, 23(11): 3145-3148 http://www.hplpb.com.cn/article/id/5509 [8] 方进勇, 张治强, 黄文华, 等. 常用衰减器功率容量测试[J]. 强激光与粒子束, 2010, 22(11): 2663-2668. http://www.hplpb.com.cn/article/id/4872Fang Jinyong, Zhang Zhiqiang, Huang Wenhua, et al. Power capacity test of common attenuator. High Power Laser and Particle Beams, 2010, 22(11): 2663-2668 http://www.hplpb.com.cn/article/id/4872 [9] 刘英君, 宁辉, 周捷, 等. 波导器件网络参数的误差修正方法研究[J]. 电子测量与仪器学报, 2013, 27(5): 467-472. https://www.cnki.com.cn/Article/CJFDTOTAL-DZIY201305015.htmLiu Yingjun, Ning Hui, Zhou Jie, et al. Research on error correction method for network parameter of waveguide device. Journal of Electronic Measurement and Instrument, 2013, 27(5): 467-472 https://www.cnki.com.cn/Article/CJFDTOTAL-DZIY201305015.htm [10] 刘英君. 波导同轴转换器件误差修正模型的研究[D]. 西安: 西北核技术研究所, 2011.Liu Yingjun. Research on the error correction model of waveguide-coaxial devices. Xi'an: Northwest Institute of Nuclear Technology, 2011 -
点击查看大图
计量
- 文章访问数: 1308
- HTML全文浏览量: 251
- PDF下载量: 156
- 被引次数: 0
