Modeling Broadband Wire Antennas with Complex Geometry

Bittera, M.

doi:10.1016/j.proeng.2014.03.094

Cited by 5 publications

(4 citation statements)

References 6 publications

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“…In our case, this is a hybrid Bilog antenna; see Fig. 3, where the creation of the model is described in [22]. The most important parameter in terms of analysis is the antenna factor Fa:…”

Section: A Analysis Of Uncertainty Sourcesmentioning

confidence: 99%

Alternative Approach Leading to Reduction in Measurement Instrument Uncertainty of EMI Measurement

Bittera¹,

Hallon²,

Szolik³

et al. 2023

Measurement Science Review

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Even in the field of electromagnetic compatibility, low measurement uncertainty means high measurement quality. Although there are standardized procedures for obtaining the uncertainty of such a measurement, which facilitate uncertainty estimation, modern approaches show further reduction possibilities. The paper presents an alternative approach to reducing measurement instrument uncertainty in the case of electromagnetic interference measurement based on many years of our experience and a large number of measurements in this field. In the paper, two different methods of uncertainty reduction are described. The first method is based on a detailed analysis of the sources of uncertainty and the subsequent division of the analyzed frequency band into more subranges. Another method uses the choice of the antenna factor, which also contains information about the test site where the measurement is carried out. In this way, despite a lengthy analysis, it is relatively easy to achieve a measurement instrument uncertainty that is below the maximum measurement uncertainty given by the CISPR standard.

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“…In our case, this is a hybrid Bilog antenna; see Fig. 3, where the creation of the model is described in [22]. The most important parameter in terms of analysis is the antenna factor Fa:…”

Section: A Analysis Of Uncertainty Sourcesmentioning

confidence: 99%

Alternative Approach Leading to Reduction in Measurement Instrument Uncertainty of EMI Measurement

Bittera¹,

Hallon²,

Szolik³

et al. 2023

Measurement Science Review

Self Cite

View full text Add to dashboard Cite

show abstract

“…Solving difficult problems in electromagnetism can be done experimentally, analytically, or numerically. Numerical methods, as the most practical way of solving these problems, can be divided into three main categories: frequency domain, time domain and eigenmode or modal solvers, while the most suitable methods are solvers in frequency domain [4]. They generally solve Maxwell's equations in their integral form [5]:…”

Section: Problem Analysismentioning

confidence: 99%

“…In [11], FSV validation has been presented for computational electromagnetics modelling and simulation. Previous works that analysed and validated the effect of model accuracy on simulation results for logarithmicperiodic dipole array and hybrid biconical-logarithmic-periodic dipole array are in [4] and [12]. The accuracy of the model dimensions and shape has considerable impact on simulation results.…”

Section: Problem Analysismentioning

confidence: 99%

Modelling of Emc Broadband Antennas With Complex Geometry Above 1 GHz

Nováková¹,

Bittera²,

Smiesko³

et al. 2016

Proceedings of the 27th International DAAAM Symposium 2016

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Radiofrequency measurements of electromagnetic compatibility are negatively influenced by uncertainty of the measuring antenna. To make quantification of errors caused by the antenna faster, it is useful to create an antenna model and simulate the circumstance. A change in parameter values caused by a change of position of the antenna or a change of surroundings can be determined using a numerical electromagnetic simulation software. Modelling a precise copy of antenna, however, can cause unnecessarily high simulation requirements, therefore it is essential to know how model structure simplification affects the characteristics of the model. For this purpose, broadband antennas commonly used for measurements of electromagnetic compatibility above 1 GHz were taken into account: stacked logarithmic-periodic antenna and double-ridged horn antenna. Multiple models were created with various extent of simplification to achieve reduction in computational time and memory requirements. The level of correspondence of the model to the real antenna was inspected, using chosen electromagnetic simulation software, by obtaining characteristic parameters of the models, i.e. antenna factor, gain, and radiation pattern, and by comparison of results to measured values. Considering the results and computational effort of the simulation, the most suitable model was chosen for each antenna.

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“…Refs. [2,3] evaluated the structure of Bi-log antennas in 15 elements to cover the frequency range of 30 MHz to 1 GHz, but their operation bandwidth might exhibit a limitation when compared with conventional antennas. The impact of a ground plane and mutual coupling on the antenna factor (AF) was investigated using the Bi-log antenna in [4].…”

Section: Introductionmentioning

confidence: 99%

An Optimization Design of Bi-log Hybrid Antenna with Taguchi’s Method for EMI Measurements

Lee,

Lin

2023

Applied Sciences

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This paper presents a comprehensive design approach for a biconical log-periodic dipole array (Bi-log) hybrid antenna optimized specifically for electromagnetic interference (EMI) measurements. The antenna’s elements, scaling function, feed structure, balanced-to-unbalanced (Balun) geometry, and key parameter selection are carefully considered to achieve enhanced broadband testing capabilities. The proposed compact Bi-log hybrid antenna is optimized using Taguchi’s method within the frequency range of 30 MHz to 6 GHz. The optimization focuses on the discontinuity of the antenna factor (AF), incorporating miniaturized elements. The dimensions of the proposed antenna are minimized, with a length of 95 cm, width of 148.5 cm, height of 60 cm, and weight of 2.5 kg. Simulation results and experimental validations demonstrate its efficacy through comparison. Optimization results indicate that the voltage standing wave ratio VSWR < 2 (with 5 dB attenuator) and symmetry < ±0.5 dB also meet the regulatory standards according to ANSI C 63.4. This makes the proposed antenna suitable for use in various types of semi-anechoic chambers.

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Modeling Broadband Wire Antennas with Complex Geometry

Cited by 5 publications

References 6 publications

Alternative Approach Leading to Reduction in Measurement Instrument Uncertainty of EMI Measurement

Alternative Approach Leading to Reduction in Measurement Instrument Uncertainty of EMI Measurement

Modelling of Emc Broadband Antennas With Complex Geometry Above 1 GHz

An Optimization Design of Bi-log Hybrid Antenna with Taguchi’s Method for EMI Measurements

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