Spectral incremental propagation (SIP) procedure for fast calculation of scattered fields from conducting bodies

Cook, G.G.; Anderson, A.P.; Turnbull, Aaron

doi:10.1049/ip-h-2.1989.0006

Cited by 7 publications

(3 citation statements)

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“…This notion enables the exact solution of some problems, and simplifies the calculation of more complicated ones. These stl solutions are useful as controls for fast Fourier transform methods such as the beam propagation method (b p m ) (Baets & Lagasse 1982 ; Van Roey et al 1981) or the spectral incremental propagation (Anderson & Cook 1985 ;Cook et al 1989;Junkin & Anderson 1988). However, the stl solutions are exact, and offer physical insight.…”

Section: Introductionmentioning

confidence: 99%

Some exact slab transmission line solutions for planar dielectric waveguiding structures

Hewson-Browne

Kendall

1990

Proc. R. Soc. Lond. A

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The concept of the transmission line, which has proved so fruitful in electronics generally, is adapted for application to planar dielectric waveguiding structures. The possibility of such structures losing signal strength through radiation, and the difficulty of assessing this power loss, is well known in opto-electronics. Here, it is shown that the slab transmission line may be used to obtain exact solutions for open waveguiding structures that have hitherto been unapproachable by such simple means. A new class of waveguide intersections is discovered. The latter have the property that they consist entirely of guided waves, and there is no general radiation. These simple structures may be regarded as outer solutions, where the inner solution depends on the precise structure of the region of intersection. The new solutions predict the possibility of manufacturing new structures which in principle achieve total transmission around a corner at which a waveguide is reflected from a metal or a dielectric mirror. General applications, and applications to opto-electronics using the concept of the effective dielectric constant are discussed. The solutions also provide accurate controls for numerical methods of solution.

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Section: Introductionmentioning

confidence: 99%

Some exact slab transmission line solutions for planar dielectric waveguiding structures

Hewson-Browne

Kendall

1990

Proc. R. Soc. Lond. A

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“…• Just a single pass through all the planes must be done. As results presented in [8] show, this method provides accurate near zone predictions for scattered fields. An end-to-beginning propagation may be needed if the backward-scattered radiation is worth of being considered.…”

Section: The Spectral Incremental Propagation (Sip)mentioning

confidence: 72%

“…This procedure is described in [7] and [8], and it is similar to the previous one with the advantage of dealing directly with scattered fields instead of current distributions, so the computational cost is reduced significantly. The scheme of the three-dimensional version is:…”

Section: The Spectral Incremental Propagation (Sip)mentioning

confidence: 99%

Electromagnetic propagation in tunnels

Izquierdo Fernández

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Introduction of wireless communications systems in railway communications are at the origin of this thesis. Ifercat, the company in charge of the development of Línia 9 of Barcelona Metro, decided that wireless systems were employed in order to increase efficiency and safety. For this reason, characterisation of ISM 5.8GHz band in tunnel environments for broad band wireless train communications becomes necessary. Tunnel environments constitute harsh environments due to humidity, obstacles, power systems, moving trains, curves¿ The Automatic Train Control system requires a 20MHz bandwidth for train-to-ground video transmission in order to get on-board information and surveillance. Given that Línia 9 was at the early stages of its development at the beginning of the study, a dual-polarised spectral simulator was developed first. Spectral techniques work in both spatial and spatial-frequency domain and are extremely adaptable to changes in the tunnel cross section as the wave front passes down the tunnel. Efficiency of this technique comes from the well-known properties of FFT algorithms. Spectral techniques provide good near-field predictions and can model different antenna configurations easily. On the other hand, boundary conditions present some issues that must be overcome. Long tunnels also represent a problem in terms of required memory space. The parabolic equation has been used to enhance the performance of spectral techniques far from the source. They complement each other well because parabolic conditions require smooth variations in one direction, thus far from the source, where only field components propagating parallel to the tunnel axis remain, in order to provide accurate results. Application of Leontovich boundary conditions ensures proper solution at the change of media and its low computational cost permits acceleration of predictions. These two techniques are then combined to verify the measurement campaigns developed at metro tunnels during the thesis. MIMO schemes are used to enhance the system throughput and simulation predictions are compared to measurements with good results. The work presented in this thesis consisted first on implementing both simulators and verifying their correct behaviour with theoretical analytical solutions. Secondly, predictions are compared with measurement campaigns carried out in Barcelona Metro environments. The study focuses on EM attenuation, field distribution, fading characterisation, antenna location and MIMO processing at the frequency band of interest.

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SIP Simulation for Urban Microcells

Wagen

1992

Third Generation Wireless Information Networks

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Spectral incremental propagation (SIP) procedure for fast calculation of scattered fields from conducting bodies

Cited by 7 publications

References 0 publications

Some exact slab transmission line solutions for planar dielectric waveguiding structures

Some exact slab transmission line solutions for planar dielectric waveguiding structures

Electromagnetic propagation in tunnels

SIP Simulation for Urban Microcells

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