The Use of Quarter-Wave Resonators to Improve Modal Filters Performance

Zhechev, Yevgeniy S.; Zabolotsky, A. M.

doi:10.1109/edm52169.2021.9507692

“…The main disadvantage of such an MF is a relatively small attenuation of UWB pulses. There are various modifications of MFs, which have greater attenuation [5], [6]. In such structures, the performance could be improved by using additional solutions.…”

Section: Introductionmentioning

confidence: 99%

New Technique for Improving Modal Filter Performance by Using an Electromagnetic Absorber

Zhechev¹,

Hasan²,

Malygin³

2022

Preprint

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<p>This paper presents a novel technique for improving the performance of a modal filter by using an electromagnetic absorber. The study considers a two-conductor modal filter based on a microstrip transmission line. The authors analyzed the effect of the absorber on the MF performance in suppressing conducted and radiated interferences (in the near and far fields). The frequency characteristics of the device were then redefined into the time characteristics in the Advanced Design System. As an excitation, the authors used an ultra-wideband interference pulse of 155 ps (at 0.5 level) and then employed N-norms to estimate and characterize the decomposed pulses. The results show that the use of the absorber can significantly improve the attenuation of the ultra-wideband interference. It was experimentally demonstrated that the value of N1 decreased by a factor of 4.31, N2 – by a factor of 6.52, N5 – by a factor of 1.87. In terms of radiated interference in the near field, the improvement in attenuation of each norm achieved at least 2.81 times. The analysis of the characteristics in the far field showed that the use of the electromagnetic absorber allows reducing the transmission coefficient on average by 2.25 times at a distance of 1 m. To validate the measurement results, the electrodynamic simulation of the modal filter characteristics in the frequency range up to 6 GHz was carried out and showed full agreement with the experimental results.</p>

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“…The main disadvantage of such an MF is a relatively small attenuation of UWB pulses. There are various modifications of MFs, which have greater attenuation [5], [6]. In such structures, the performance could be improved by using additional solutions.…”

Section: Introductionmentioning

confidence: 99%

New Technique for Improving Modal Filter Performance by Using an Electromagnetic Absorber

Zhechev¹,

Hasan²,

Malygin³

2022

Preprint

Self Cite

0

View full text Add to dashboard Cite

<p>This paper presents a novel technique for improving the performance of a modal filter by using an electromagnetic absorber. The study considers a two-conductor modal filter based on a microstrip transmission line. The authors analyzed the effect of the absorber on the MF performance in suppressing conducted and radiated interferences (in the near and far fields). The frequency characteristics of the device were then redefined into the time characteristics in the Advanced Design System. As an excitation, the authors used an ultra-wideband interference pulse of 155 ps (at 0.5 level) and then employed N-norms to estimate and characterize the decomposed pulses. The results show that the use of the absorber can significantly improve the attenuation of the ultra-wideband interference. It was experimentally demonstrated that the value of N1 decreased by a factor of 4.31, N2 – by a factor of 6.52, N5 – by a factor of 1.87. In terms of radiated interference in the near field, the improvement in attenuation of each norm achieved at least 2.81 times. The analysis of the characteristics in the far field showed that the use of the electromagnetic absorber allows reducing the transmission coefficient on average by 2.25 times at a distance of 1 m. To validate the measurement results, the electrodynamic simulation of the modal filter characteristics in the frequency range up to 6 GHz was carried out and showed full agreement with the experimental results.</p>

show abstract

“…The main disadvantage of such an MF is a relatively small attenuation of UWB pulses. There are various modifications of MFs that have greater attenuation coefficients [3], [4]. In such structures, the performance could be improved by using additional solutions.…”

Section: Introductionmentioning

confidence: 99%

New Technique for Improving Modal Filter Performance by Using an Electromagnetic Absorber

Zhechev

¹

,

Hasan

²

,

Malygin

³

2022

IEEE Access

12

0

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This paper presents a novel technique for improving modal filter (MF) performance by using an electromagnetic absorber which shows a significant improvement in attenuation of ultra-wideband interference. The authors analyzed the effect of the absorber on the MF performance in suppressing conducted and radiated interferences (in the near and far fields). As an excitation, the authors used an ultra-wideband pulse of 155 ps (at 0.5 level) and then employed N-norms to estimate and characterize the decomposed pulses. It was experimentally demonstrated that the value of N1 decreased by a factor of 4.31, N2by a factor of 6.52, N5by a factor of 1.87. In terms of radiated interference in the near field, the improvement in attenuation of each norm achieved at least 2.81 times. The analysis of the characteristics in the far field showed that the use of the electromagnetic absorber allows reducing the transmission coefficient on average by 2.25 times at a distance of 1 m.INDEX TERMS Electromagnetic compatibility and interference, modal filter, ultra-wideband pulse, electromagnetic absorbers, microwave measurement, TEM-cells.

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The Use of Quarter-Wave Resonators to Improve Modal Filters Performance

Cited by 4 publications

References 11 publications

New Technique for Improving Modal Filter Performance by Using an Electromagnetic Absorber

New Technique for Improving Modal Filter Performance by Using an Electromagnetic Absorber

New Technique for Improving Modal Filter Performance by Using an Electromagnetic Absorber

New Technique for Improving Modal Filter Performance by Using an Electromagnetic Absorber

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