Journal ArticleDOI
Considerations for source pulses and antennas in UWB radio systems
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TLDR
In this article, the design of source pulses and transmitting/receiving antennas in ultrawide-band radio systems was investigated in terms of pulse fidelity and system transmission efficiency.Abstract:
This paper addresses two vital design considerations in ultrawide-band radio systems. One is that radiated power density spectrum shaping must comply with certain emission limit mask for coexistence with other electronic systems. Another is that the design of source pulses and transmitting/receiving antennas should be optimal for the performance of overall systems. The design of source pulses and transmitting/receiving antennas under the two considerations is discussed. First, the characteristics of transmitting/receiving antenna systems are described by a system transfer function. Then, the design of source pulses and transmitting antennas are studied based on the considerations for emission limits. Finally, the design of transmitting and receiving antennas are investigated in terms of pulse fidelity and system transmission efficiency. In the studies, thin wire dipoles with narrow bandwidths and planar dipoles with broad bandwidths are exemplified.read more
Citations
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Journal ArticleDOI
Study of a printed circular disc monopole antenna for UWB systems
TL;DR: In this article, a planar circular disc monopole has been demonstrated to provide an ultra wide 10 dB return loss bandwidth with satisfactory radiation properties, and the parameters which affect the performance of the antenna in terms of its frequency domain characteristics are investigated.
Journal ArticleDOI
Small Printed Ultrawideband Antenna With Reduced Ground Plane Effect
TL;DR: In this paper, a small printed antenna with a reduced groundplane effect for ultrawideband (UWB) applications is described, where a notch is cut from the radiator while a strip is asymmetrically attached to the radiator.
Journal ArticleDOI
Textile UWB Antennas for Wireless Body Area Networks
Maciej Klemm,G. Troester +1 more
TL;DR: Measured return loss and radiation pattern characteristics of textile UWB antennas agree well with simulations and measured transfer functions show that these textile antennas possess excellent transient characteristics, when operating in free space as well as on the human body.
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Antennas for Portable Devices
TL;DR: In this article, Chen et al. present an approach for the design and evaluation of an Inverted-F Antenna with Coupled Floating Elements (INF) for low-bandwidth applications.
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Broadband Planar Antennas: Design and Applications
Zhi Ning Chen,M.Y.W. Chia +1 more
TL;DR: In this article, the authors present an overview of the most important features of a planar antenna and its application in computer applications. But, they do not discuss how to improve the performance of these antennas.
References
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Journal ArticleDOI
Evaluation of an ultra-wide-band propagation channel
TL;DR: This paper describes the results of an ultra-wideband (UWB) propagation study in which arrays of propagation measurements were made, and an approach to the spatial and temporal decomposition of an array of measurements into wavefronts impinging on the receiving array is presented.
Journal ArticleDOI
On the robustness of ultra-wide bandwidth signals in dense multipath environments
Moe Z. Win,Robert A. Scholtz +1 more
TL;DR: The results show that an ultra-wide bandwidth signal does not suffer multipath fading, and the robustness of the UWB signal in multipath is quantified through cumulative distribution functions of the signal quality in various locations of the building.
Journal ArticleDOI
Baseband-pulse-antenna techniques
D. Lamensdorf,L. Susman +1 more
TL;DR: In this paper, two approaches for describing the time-domain performance of an antenna were described, one of which uses the transfer function, a function which describes the amplitude and phase of the response over the entire frequency spectrum, and the other one uses time domain parameters, such as efficiency, energy pattern, receiving area, etc.
Journal ArticleDOI
Time-domain electromagnetics and its applications
C.L. Bennett,G.F. Ross +1 more
TL;DR: In this article, the authors introduce the reader to the elments of time-domain electromagnetics, which includes baseband-pulse technology and target-signature analysis.
Journal ArticleDOI
Antenna characterization in the time domain
TL;DR: In this paper, a theory for a complete far-field transmit-receive system characterization of short-pulse antennas is derived in the time domain, which is characterized by a set of cascaded operators which transform the source waveform and power into similar quantities at the receiving antenna terminals.