|
|
|
| The Uncertainty Estimation for the Probe Calibration Results Employing a TEM Cell |
| LIU Xiao,LI Bo,XIE Ming |
| National Institute of Metrology, Beijing 100029, China |
|
|
|
|
Abstract he TEM cell is used widely as an electromagnetic field generator, and by employing it, a probe calibration system can be set up to calibrate the radio frequency electromagnetic field probe. A probe calibration system working at 300 kHz～100 MHz is analyzed, and the measurement result uncertainty is presented for a magnetic field probe at five different frequencies in that range. The analysis takes into account the effect of the wave impedance inside the TEM cell, and that of the interaction between the probe and the standard field etc, which can be a useful guide to analyse the electromagnetic field probe calibration process.
|
|
|
|
|
|
［1］Myron L C. Generation of standard EM fields using TEM transmission cells［J］. IEEE Transactions on Electromagnetic Compatibility,1974,16(4): 189-195.
［2］Heinrich Garn. A Comparison of Electric Field-Strength Standards for the Frequency Range of 30-1000MHz［J］. IEEE Transaction on Electromagnetic Compatibility, 1997,39(4): 397-403.
［3］IEEE Electromagnetic Compatibility Society. IEEE Std.1309TM—2005 IEEE standard for calibration of electromagnetic field sensors and probes, excluding antennas, from 9 kHz to 40 GHz［S］.
［4］Matloubi K. A method for calibration of isotropic, E-field probes［C］//IEEE 1999 International Symposium Record on Electromagnetic Compatibility,New Jersey, 1991.
［5］Zilberti L, Bottauscio O, Chiampi M, et al. On the use of TEM cells for the calibration of power frequency electric field meters［J］. Measurement,2010, 43(9):1282-1290.
［6］曾嵘,沈晓丽,陈未远.横电磁波小室校准系统产生标准电场的不确定度评定［J］.高电压技术,2012, 38(11): 2781-2788.
［7］Liu X, Xie M, Li D B, et al. A method to calculate the net power delivered into a TEM cell using a directional coupler in a probe calibration application［C］//2nd Internationl conference on Sensors, Measurement and Intelligent Materials, Guangzhou, 2013.
［8］JJF1059—1999,测量不确定度评定与表示［S］.
［9］Spiegel R J, Joines W T, Blackman C F, et al. A method for calculating electric and magnetic fields in TEM cells at ELF［J］. IEEE Transaction on Electromagnetic Compatibility, 1987, 29(4): 265-272. |
|
|
|
2015, Vol. 36 
