Journal ArticleDOI
A Series Solution for the Single-Mode Synthesis Problem Based on the Coupled-Mode Theory
TLDR
In this article, an exact analytical solution for the inverse scattering problem formulated by using the coupled-mode theory in the microwave range, assuming single-mode operation, is presented, where the solution is a series that gives the required coupling coefficient for the microwave device as a function of the target frequency response.Abstract:
In this paper, we present an exact analytical solution for the inverse scattering problem formulated by using the coupled-mode theory in the microwave range, assuming single-mode operation. The solution is a series that gives the required coupling coefficient for the microwave device as a function of the target frequency response. A clear physical meaning for the terms of the series is discussed, and several useful properties for the synthesis are given, thus providing a deep understanding of the synthesis mechanics. The method allows for the design of microwave devices with arbitrary frequency response only constrained by principles of causality, passivity, and stability. The resulting device is, in general, a nonuniform waveguide that features a continuously varying profile, e.g., a nonuniform microstrip line with continuously varying strip width. As an example of the potential of the synthesis method, a matched filter for ultra-wideband applications is finally designed in microstrip technology and successfully tested.read more
Citations
More filters
Journal ArticleDOI
An Electronic UWB Continuously Tunable Time-Delay System With Nanosecond Delays
TL;DR: In this article, the authors proposed and demonstrated an electronic system achieving continuously tunable time-delays with nanosecond-scale delay excursions for ultra-wideband signals.
Journal ArticleDOI
Passive Microwave Planar Circuitsfor Arbitrary UWB Pulse Shaping
TL;DR: In this article, a new technique for generating customized pulse-shapes intended for use in ultrawideband (UWB) applications was proposed and demonstrated using an exact analytical series solution of the synthesis problem derived from the coupled mode theory.
Journal ArticleDOI
Experimental Demonstration of Pulse Shaping for Time-Domain Microwave Breast Imaging
Adam Santorelli,M. Chudzik,Evgeny Kirshin,Emily Porter,A. Lujambio,Israel Arnedo,Milica Popovic,Joshua D. Schwartz +7 more
TL;DR: The ability to use this technique to detect the presence of tumours in realistic breast phantoms composed of varying quantities of glandular tissue is reported on.
Journal ArticleDOI
Temporal Pulse Compression Beyond the Fourier Transform Limit
TL;DR: In this article, a class of super-oscillatory electromagnetic waveforms for which the sideband amplitudes can be regulated, and hence, the sensitivity can be increased without hindrances from bandwidth limitations.
Journal ArticleDOI
Design of Transmission-Type $N$ th-Order Differentiators in Planar Microwave Technology
M. Chudzik,Israel Arnedo,A. Lujambio,Ivan Arregui,I. Gardeta,Fernando Teberio,José Azaña,D. Benito,Miguel A. G. Laso,Txema Lopetegi +9 more
TL;DR: In this paper, an exact analytical series solution for the synthesis problem derived by the authors from the coupledmode theory is proposed and demonstrated for the design of arbitrary-order differentiators, intended for ultra wideband (UWB) applications in microwave coupledline technology.
References
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Book
Foundations for microwave engineering
TL;DR: This paper presents a meta-modelling architecture for waveguiding systems that automates the very labor-intensive and therefore time-heavy and expensive process of designing and installingWaveguiding Systems.
Journal ArticleDOI
Ultra-wide bandwidth time-hopping spread-spectrum impulse radio for wireless multiple-access communications
Moe Z. Win,Robert A. Scholtz +1 more
TL;DR: Performance of time-hopping spread-spectrum multiple-access systems employing impulse signal technology for both analog and digital data modulation formats under ideal multiple- access channel conditions is estimated.
Journal ArticleDOI
The Fourier Integral and its Applications
Journal ArticleDOI
Recent system applications of short-pulse ultra-wideband (UWB) technology
TL;DR: In this article, the authors provide a brief historical perspective of UWB, discusses recent techniques for the generation and reception of short-pulse electromagnetic waveforms, and examines a number of recently developed UWB systems in the communications, radar, and precision-positioning fields.