Journal ArticleDOI
Investigation of time‐domain characteristics of thin‐wire antennas
TLDR
In this paper, the transient response of thin-wire dipoles is investigated using a time-domain integral-equation method, and the directional characteristics are demonstrated by the gain for dipoles and V-dipoles.Abstract:
In this paper, the transient response of thin-wire dipoles is investigated using a time-domain integral-equation method. First, an antenna system comprising two straight wire dipoles is numerically ana- lyzed using the direct method and the separation method, and is verified by the measurement. The separation method enables us to consider the transmitting antenna and the receiving antenna separately during the antenna-system design process. Secondly, the transient response of an antenna excited by pulses with different time duration is investigated. The response strongly depends on the time duration of the pulse. Lastly, the directional characteristics are demonstrated by the gain for dipoles and V-dipoles. The received pulses by antenna systems composed of V-dipoles are discussed. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 43: 253-258, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20435read more
Citations
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Journal ArticleDOI
Aspects on the phase delay and phase velocity in the electromagnetic near-field
Johan C.-E. Sten,Arto Hujanen +1 more
TL;DR: In this paper, it was shown that the phase of the transverse field components of a dipole approach kr − π/2, and not kr, in the radiation zone.
Journal ArticleDOI
Pulse waveforms for 60 GHz M-ary pulse position modulation communication systems
TL;DR: Among the pulse waveforms examined in this study, the truncated sinc pulse is the best in terms of compliance with FCC regulations and the PPM error probability and capacity.
Journal ArticleDOI
Systematic Approach to Estimating Monocycle Pulse for Time-Domain Studies of UWB Antennas Using Numerical Computations and Simulation Tools
TL;DR: In this article, a new technique for determining an appropriate input pulse and its duration is proposed, which is important for time-domain studies of ultra-wideband (UWB) antennas.
Proceedings ArticleDOI
Time domain studies of ultra wideband monopole: Theoretical study to alleviate ambiguities
TL;DR: In this article, the authors proposed a new technique and examined the same for a UWB monopole antenna, which should alleviate present lacunae in time domain analysis and help one to obtain accurate characteristics theoretically.
References
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Journal ArticleDOI
Direct time-domain techniques for transient radiation and scattering from wires
E.K. Miller,J.A. Landt +1 more
TL;DR: In this article, a tutorial introduction to transient electromagnetics focusing on direct time-domain techniques is presented, with emphasis on wire objects excited as antennas or scatterers.
Journal ArticleDOI
A study of pulse radiation from several broad-band loaded monopoles
T.P. Montoya,Glenn S. Smith +1 more
TL;DR: In this article, five different designs for broad-band monopole antennas are evaluated for pulse radiation and various quantities characteristic of their pulsed performance are computed, including reflected voltage in the feeding transmission line, radiated electric field, radiating efficiency, time-domain gain, fidelity, and symmetry when the monopoles are excited by a differentiated Gaussian pulse.
Journal ArticleDOI
Closed-form approximations for link loss in a UWB radio system using small antennas
TL;DR: In this article, it was shown that the use of the basic Friis formula can result in link loss errors of more than 60 dB for a UWB system having severely (impedance) mismatched antennas, but may give results correct to within a few dB for well-matched narrowband antennas, or if the formula is augmented with an impedance mismatch correction factor.
Journal ArticleDOI
Some thoughts about transient radiation by straight thin wires
TL;DR: In this paper, the authors discuss several basic features related to the transient radiation of electromagnetic waves by straight thin-wire antennas, from a physical point of view, and present a theoretical analysis of these features.
Journal ArticleDOI
On the interpretation for radiation from simple current distributions
TL;DR: In this paper, the radiation from two simple filamentary current distributions, traveling-wave and uniform, was considered, and the total energy radiated by the distributions, U/sub rad/, was shown to behave as ln(/spl tau/sub a///spltau/) for the traveling wave distribution, and as Ln tau//sub a/=h/c for the uniform distribution, where h/c is the time for light to travel the length of the filament.