High-Accuracy Amplitude and Phase Measurements for Low-Level RF Systems

	High-Accuracy Amplitude and Phase Measurements for Low-Level RF Systems
	Wang, Z; Mao, LH; 刘熔; Liu, R
刊名	IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
	2012
卷号	61 期号:4 页码:912-921
关键词	Amplitude measurement discrete Fourier transform (DFT) digital IF high accuracy low-level RF (LLRF) oversampling phase measurement RF control
英文摘要	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.
学科主题	Engineering; Instruments & Instrumentation
收录类别	SCI
WOS记录号	WOS:000301507300007
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/224081]
专题	高能物理研究所_加速器中心
推荐引用方式 GB/T 7714	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.