A Dynamical Radiation Model for Microstrip Structures

Mosig, J. R.; Gardiol, F. E.

doi:10.1016/s0065-2539(08)60110-9

Cited by 187 publications

(109 citation statements)

References 91 publications

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“…This simplies the optimization procedure and the MoM algorithm, as described in the following. Even though triangular mesh elements are more common, rectangular mesh elements [12,18] pertain better to the considered regular shapes and illustration purposes of this study. Using rectangular mesh element discretization the optimal structures may take arbitrary shapes made of any of the mesh elements within the rectangular region.…”

Section: Rectangular Regionsmentioning

confidence: 99%

Antenna Bandwidth Optimization With Single Frequency Simulation

Cismasu

Gustafsson

2014

IEEE Trans. Antennas Propagat.

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A method to compute antenna Q using an electromagnetic simulation at a single frequency is described. This method can easily be integrated into global optimization algorithms. In this way the optimization time of some antenna parameters, e.g., bandwidth, may be signicantly reduced. The method is validated by direct comparison with the physical bound of the analyzed structure. Numerical examples for rectangular antennas and antennas with a rectangular ground plane illustrate the integration of the method into a genetic algorithm. The results predicted by optimization agree very well with those obtained using a commercial electromagnetic solver. These results suggest that the method can be used to yield antennas with Q factors within 20 % of their corresponding physical bound.

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Section: Rectangular Regionsmentioning

confidence: 99%

Antenna Bandwidth Optimization With Single Frequency Simulation

Cismasu

Gustafsson

2014

IEEE Trans. Antennas Propagat.

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“…(17) where in the first column and is the best approximation of , given the partial sums . In the original version of the WA method [19], the remainders are expanded into infinite series using integration by parts, which is truncated for numerical purposes (18) where (19) The weights obtained in this way, although different, are asymptotically equivalent to those in (15). In the new WA method [22], the same remainder expansion is used.…”

Section: A Partition-extrapolation Methods Involving Wa Techniquementioning

confidence: 99%

“…WA method was originally introduced in the early eighties by Mosig [19]- [21]. It was later further extended and improved in a very complete paper by Michalski [13], who found WA to be a sophisticated version of the Euler transformation.…”

Section: Introductionmentioning

confidence: 99%

Efficient Algorithms for Computing Sommerfeld Integral Tails

Golubovic

Polimeridis

Mosig

2012

IEEE Trans. Antennas Propagat.

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Abstract-Sommerfeld-integrals (SIs) are ubiquitous in the analysis of problems involving antennas and scatterers embedded in planar multilayered media. It is well known that the oscillating and slowly decaying nature of their integrands makes the numerical evaluation of the SI real-axis tail segment a very time consuming and computationally expensive task. Therefore, SI tails have to be specially treated. In this paper we compare two recently developed techniques for their efficient numerical evaluation. First, a partition-extrapolation method, in which the integration-then-summation procedure is combined with a new version of the weighted averages (WA) extrapolation technique, is summarized. The previous variants of WA technique are also discussed. Then, a review of double-exponential (DE) quadrature formulas for direct integration of the SI tails is presented. The efficient way of implementing the algorithms, their pros and cons, as well as comparisons of their performance are discussed in detail.

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“…The physical meaning of this condition is that all solutions to the scalar Helmholtz equation represent waves traveling away from the source and decreasing in amplitude with the distance. Since all boundary conditions appear for z = constant, it is appropriate to choose the cylindrical coordinate system for the microstrip problem [38,39]. In this system, Helmholtz's equation can be solved through separation of variables.…”

Section: Horizontal Current Element In Microstripmentioning

confidence: 99%

“…Taking into account the nature of Ψ , the integration over k ρ leads to Hankel transforms and is better suited for this axially symmetrical problem than integration over k z that yields Fourier Transforms [39]. Therefore, the general solution for, say A z , is given by…”

Section: Horizontal Current Element In Microstripmentioning

confidence: 99%