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High-Accuracy Amplitude and Phase Measurements for Low-Level RF Systems
Wang, Z; Mao, LH; 刘熔; Liu, R
2012
发表期刊IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
卷号61期号:4页码:912-921
摘要This paper presents a detection system for high-accuracy amplitude and phase measurements on RF signals. It is typically used to set up the low-level RF system for particle accelerators. The proposed detector employs the principle of a heterodyne receiver and uses the digital IF architecture with a high oversampling rate to increase the SNR. A discrete Fourier transform-based quadrature demodulator is used to suppress the analog-to-digital converter (ADC) quantization noise and IF harmonics. The system has been evaluated at an IF of 1 MHz and in an RF range of 500-3000 MHz. A graphical user interface is developed to display and record the measured values. The detection accuracy achieved on 500-MHz signals in a 250-kHz bandwidth is better than +/- 0.0051% for the amplitude and better than +/- 0.0032 degrees for the phase. Experimental results at different frequencies prove that the detection system can meet the demands of state-of-the-art RF control systems for modern particle accelerators.
关键词Amplitude measurement discrete Fourier transform (DFT) digital IF high accuracy low-level RF (LLRF) oversampling phase measurement RF control
学科领域Engineering; Instruments & Instrumentation
DOI10.1109/TIM.2011.2179334
收录类别SCI
WOS记录号WOS:000301507300007
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被引频次:6[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/224081
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Wang, Z,Mao, LH,刘熔; Liu, R. High-Accuracy Amplitude and Phase Measurements for Low-Level RF Systems[J]. IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT,2012,61(4):912-921.
APA Wang, Z,Mao, LH,&刘熔; Liu, R.(2012).High-Accuracy Amplitude and Phase Measurements for Low-Level RF Systems.IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT,61(4),912-921.
MLA Wang, Z,et al."High-Accuracy Amplitude and Phase Measurements for Low-Level RF Systems".IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT 61.4(2012):912-921.
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