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Compliance tests for railway signaling equipment are getting more important for manufacturing railway traction converters. The traction converters emit disturbance current interfering with track circuits and electromagnetic field interfering with magnetic loops, which are also called balises. The interference with balises is severe problem because the electromagnetic field has been unknown because...
This paper presents a new proposal for the unified evaluation of ultra wideband and narrowband radio communication systems electromagnetic compatibility, called “compatibility region”. The idea of compatibility region is based on the relation between the ratio of narrowband to ultra wideband signal power in a receiver and some transmission quality indicators (bit error rate, effective data rate).
Radio receivers' EMC testing technology based on measurement of 3D double-frequency characteristic by the use of two frequency-sweeping signals is described. This characteristic simplifies the detection and identification of all linear and nonlinear interference responses (spurious, intermodulation, etc.) of the receiver. For four types of microwave receivers, the abilities of operation in presence...
We examined the electromagnetic (EM) emissions of three commercially available systems that charge remote devices by use of inductive wireless power transfer (WPT) in the Low-Frequency (<300 KHz) range. All devices have passed applicable emissions regulations We measured the temporal and spectral characteristics of the char ging and information exchange between the charger and load. The basic WPT...
There are large areas in Digital TV planning called TV white spaces (TVWS) where certain channels are not used. They could be assigned for low-power devices operating on the non-interfering (secondary) basis with the licensed (primary) DTV service. Restrictions imposed to protect primary users should not devaluate spectrum for secondary use. In this paper we suggest that to reuse the spectrum efficiently,...
In conformity with the IEC61000-4-2 standard, we conducted a case study of electrostatic discharge (ESD) tests for a small-type control board to investigate the basic coupling characteristics of induced noises by indirect ESDs. With a vertical coupling metal plane (VCP) and a horizontal coupling metal plane (HCP), the test was conducted under ±4kV and ± 8kV charging voltages. Pulse width modulation...
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