Fast Chirp Frequency-Modulated Continuous-Wave Reflectometer for Monitoring Fast Varying Discontinuities on Transmission Lines

被引:10
作者
Moehring, Bjorn N. [1 ]
Siart, Uwe [1 ]
Eibert, Thomas F. [1 ]
机构
[1] Tech Univ Munich, Dept Elect & Comp Engn, Chair High Frequency Engn, D-80290 Munich, Germany
关键词
Cable diagnostics; chirp linearity; direct digital synthesis (DDS); distance-to-fault (DTF) measurements; frequency-domain reflectometry (FDR); frequency-modulated continuous-wave (FMCW) radar; measurement system; microwave reflectometry; short-range radar; TIME-DOMAIN REFLECTOMETRY; RADAR; FAULT; LOCALIZATION; LINEARITY; ACCURACY; LOCATION;
D O I
10.1109/TIM.2021.3122118
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
A portable fast chirp frequency-modulated continuous-wave (FMCW) reflectometer is presented to locate and monitor fast varying discontinuities or faults on transmission lines. This frequency-domain reflectometry (FDR) approach exploits and adapts the advantages of the closely related and frequently employed FMCW radar principle to transmission line reflectometry and overcomes the limitations of commonly used time-domain reflectometry (TDR) methods. The signal generation is based on direct digital synthesis (DDS) and frequency multiplication in order to exploit the advantages of DDS technology, e.g., fast and agile sweep time, and to overcome the drawbacks of analog signal sources related to nonlinearities, temperature sensitivity, or phase noise. By this means, the presented reflectometer provides highly linear, broadband, and fast swept chirp pulses with a duration on the order of microseconds with an initial frequency in the lower UHF-band and a bandwidth of 5.2 GHz. The system concept, its hardware realization, and performance specifications are introduced. The first laboratory test results for static transmission lines and a dynamic measurement setup are presented. The results demonstrate the effectiveness, versatility, and fine ranging capabilities on the order of 2 cm of this approach.
引用
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页数:11
相关论文
共 53 条
[1]  
Analog Devices, DAT AD9914
[2]  
Autodesk, PCB DES SCHEM SOFTW
[3]   Impact of Frequency Ramp Nonlinearity, Phase Noise, and SNR on FMCW Radar Accuracy [J].
Ayhan, Serdal ;
Scherr, Steffen ;
Bhutani, Akanksha ;
Fischbach, Benjamin ;
Pauli, Mario ;
Zwick, Thomas .
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 2016, 64 (10) :3290-3301
[4]  
Balon S, 2018, IEEE T MICROW THEORY, V66, P5095, DOI 10.1109/TMTT.2018.2870821
[5]  
Bao F., 2011, GERM MICR C DARMST G, P1
[6]  
Bao FQ, 2013, INT RADAR SYMP PROC, P897
[7]  
Beaty H.W., 2012, STANDARD HDB ELECT E
[8]   Determination of Sweep Linearity Requirements in FMCW Radar Systems Based on Simple Voltage-Controlled Oscillator Sources [J].
Brennan, P. V. ;
Huang, Y. ;
Ash, M. ;
Chetty, K. .
IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS, 2011, 47 (03) :1594-1604
[9]   A New Method for Detecting Leaks in Underground Water Pipelines [J].
Cataldo, Andrea ;
Cannazza, Giuseppe ;
De Benedetto, Egidio ;
Giaquinto, Nicola .
IEEE SENSORS JOURNAL, 2012, 12 (06) :1660-1667
[10]   Transmission Line Fault Imaging Using Phaseless Inverse Scattering and Temporal Sparsity [J].
Dubey, Amartansh ;
Wang, Wenjie ;
Murch, Ross .
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 2021, 69 (01) :284-296