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Spectrum is presently one of the most valuable goods worldwide as the demand is permanently increasing and it can be traded only locally. Since the United States Federal Communications Commission (FCC) has opened the spectrum from 3.1 GHz to 10.6 GHz, that is, a bandwidth of 7.5 GHz, for unlicensed use with up to −41.25 dBm/MHz EIRP, numerous applications(More)
A comprehensive model of the transmission channel between moving vehicles in realistic environments is presented in this paper. The approach consists of tree major parts: the modelling of the road traffic, the modelling of the environment adjacent to the road and the actual modelling of the wave propagation between the vehicles. A ray-tracing approach is(More)
I n this issue you will find two practical papers that should interest members of the EMC community. The first is entitled, " Comparison of Frequency Domain and Time Domain Measurement Procedures for Ultra Wideband Antennas, " by W. Sörgel, F. Pivit, and W. Wiesbeck. In this paper, the authors discuss the issue of characterizing antennas for ultra wideband(More)
dose ist dann n/imlich nicht h/iufiger als bei Spontangeburten. Die Einzelanalyse der Acidosef/ille bei gemischter Indikation zeigte, dab meistens das schlecht registrierte oder schwer deutbare CTG fehlinterpretiert und infolgedessen die fast immer verz6gerte Austreibungsperiode nicht rechtzeitig beendet worden war, wodurch die Acidose h/itte vermieden(More)
  • W. Soergel
  • 2005
result is not for from a blending of characters." Im Gegensatz zu N a b o u r s ist Prof. L y d e k k e r in ',The Ox and its Kindred" S. 248 der Ansicht: ,,The steers, at any rate of the hybrids hitherto produced, are strikingly like the male parents (Brahman) having well developed humps, large pendent ears, and showing more or less white in the(More)
The main objective of UWB antennas is capability of radiation over very wide bandwidth. But this is not a sufficient condition for proper operation with a pulse based system because different antennas radiate the pulses in different forms. That is why a temporal behavior of an antenna has to be also taken into account during the design. Also during(More)
– This paper is concerned with the calculation of the aggregate interference power from ultra-wideband devices received by a point to point communication system. The source based model for the aggregate interference power and its parameters are presented together with results for different sets of the parameter values. The results show that the applied wave(More)
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