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This paper is concerned with an analysis of propagation characteristics on the airport surface. First, we introduce a new surveillance system named as OCTPASS (Optically Connected Passive Surveillance System) which is under development at Sendai airport by our research institute ‘Electronic Navigation Research Institute (ENRI)’. The OCTPASS using the RoF (Radio over Fiber) has better interference...
In accordance with Federal Target Program “Development of the tele-radio broadcasting in the Russian Federation for the period 2009–2015” and draft of concept of analogue TV switch-off and transition to the digital TV in Russian Federation, Digital Switchover should be completed in Russian Federation in 2014–2017. One of the key outcome of that process will be Digital Dividend appearing. Digital Dividend...
The application of the automated double-frequency test technique (ADFTT) to the analysis of mixergenerated nonlinear products is described. The distinctive feature of this technique is the ability to detect all nonlinear effects appearing in the device under test. Using the ADFTT, the detailed experimental analysis of three modern double-balanced mixers is performed, which includes the detection,...
This paper deals with the susceptibility to radio frequency interference (RFI) of the analog front-end circuits embedded in smart power integrated circuits (ICs). The parasitic coupling of the power section with the analog and the digital section of these devices through the silicon substrate is discussed referring to a macro model, then the causes of RFI demodulation in analog front-end circuits...
An innovative method to model, in the early design stage, the behavior of nonlinear analog circuits in the presence of noise is presented. The technique relies on Harmonic Balance analysis and the obtained model does not only efficiently predict the influence of a continuous wave disturbance, it may also be used to quickly estimate the device's behavior while being subjected to amplitude modulated...
In this paper, a practical approach for modeling the conducted EMI in both time and frequency-domains has been presented. The model is based on equivalent sources that take into account both common-mode and differential-mode noises. The proof of concept has been validated, using PSPICE, on a typical 12V DC-DC converter through simulation and experimentation. Promising and encouraging results have...
Analog circuits such as linear voltage regulators are very sensitive to electromagnetic interferences which induce voltage offset on their outputs. In harsh environments, the aging of this component can be accelerated and could lead to an increase of the effect of electromagnetic interferences. This paper proposes an original study about the drift of the susceptibility level of a low dropout voltage...
A physically based circuit model of on-chip spiral inductor made of a single-wall carbon nanotube (SWCNT) bundle is investigated. The equivalent single conductor (ESC) approach is used to model the CNT bundle. The internal frequency-dependent resistance and inductance are computed by a finite element method (FEM). The eddy-current effect in the silicon substrate is taken into account by the complex...
The operating voltages of low-voltage control circuits in power stations and substations have become lower with the installation of digital control equipment. This significantly increases the risk of faults and malfunctions of the circuits resulting from overvoltages in the control circuits due to lightning and switching surges. Therefore, the characterization of such overvoltages is required to protect...
We present a comparison of six models representing the frequency dependence of soil electrical conductivity and permittivity, applied to the analysis of a horizontal grounding electrode subjected to typical first and subsequent lightning return stroke current. A full-wave computational model is adopted for the analysis, which is based on the antenna theory. It is shown that models by Scott, Smith-Longmire,...
The Square Kilometre Array (SKA) will be the largest radio telescope in the world. Up to 3000 dishes, and more than 500,000 array elements will be linked to obtain an extreme sensitivity. The frequency band starts at 70 MHz, and goes up to 10 GHz and possibly over 25 GHz later. Arcing on high voltage lines is a potential source of interference. Gaptype sparking is known to produce large bandwidth...
In new Aircraft, fuselage structure offer less efficient protection against lightning strikes hence this higher level of lightning constraints has to be withstanding by equipment. These constraints drastically increase the size and weight of protection parts regarding traditional protection solution. This document describes a new solution for avionics equipment lightning protection in order to optimize...
A novel surge protection device is investigated for lightning surge protection of electronic equipment embedded in composite material aircraft. The device employs silicon carbide depletion mode junction field effect transistors for current limiting.
Recently, lightning has caused considerable damage to telecommunications equipment that has multiple ports, such as home gateways. Lightning surges have also damaged other equipment installed further along a building's communications flow direction, that is into analog telecommunication lines or power lines and then via optical telecommunications equipment through LAN cables, as well as equipment...
This communication deals with the radio-electric compatibility of antennas installed on a same platform, more precisely, on a same wall plane. These antennas, associated with various communication systems on board a vehicle (such as a ship) have to be compact and installed in a limited area. Antennas's ground plane is a limiting factor since a too small one may limit antenna performances. On the other...
This paper describes some of the new developments of the SEAMCAT software. In particular, a detailed description of the implementation of CDMA (Code Division Multiple Access) UL (Uplink) enabling compatibility between CDMA system with single or clustered interfering systems.
This paper describes the activity of Ukrainian State Centre of Radio Frequencies on the frequency planning and spectrum monitoring to provide the electromagnetic compatibility and interference-free work a lot of radio electronic facilities during the UEFA European football championship EURO-2012 in Ukraine.
The mathematical model of electromagnetic field of PLC systems inside buildings has been proposed. On the basis of this model it is possible to estimate indoor electromagnetic environment where PLC systems transmit data via power lines. It allows at a design stage to take measures for providing electromagnetic compatibility between PLC systems and other electronic and electric devices working inside...
This paper proposes a realistic approach to consider the influence of grounding grids on the magnetic field inside buildings due to lightning strikes. An electromagnetic theory approach based on the method of moments is used. This method allows for a transient grounding grid analysis in both the frequency and time domains, and accounts for the effects of the soil. Calculations are performed for a...
Transients due to lightning strikes on an aircraft's fuselage impose stress on the input filters of electronic equipment. Permanent damage can occur if the voltage handling capabilities of components are exceeded. In ED-14/DO-160, section 22, a number of waveforms and levels are defined that are used to check the airworthiness of avionics equipment. Depending on procedure and level, Y-capacitors are...
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