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1

Polarization Independent Ultra-wideband Meta-material Absorber Using Conductive Ink Resonator

Kumari Bharti, Kumar Abhinav, Kumar Prashant, Singh Mintu

Journal of Telecommunications and Information Technology

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2024

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nr 1

39--45

EN

A wideband meta-material absorber with square and circular split rings that is based on a frequency selective surface of conductive ink is proposed. With over 90% absorptivity, the structure demonstrates broad absorption for the C, X, KU and K bands, as well as polarization independent characteristics for both TE and TM, at angles of up to 45°. Research has been performed to better understand the absorption phenomenon by looking into real and imaginary permittivity, permeability, normalized impedance, and surface current density. The meta-material absorber (MA) discussed in this study finds use in defense-related applications, such as radar surveillance, stealth technology, terrestrial and satellite communications.

2

A new approach to microwave absorbers

Olszewska K., Gwarek W.

Elektronika : konstrukcje, technologie, zastosowania

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2012

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Vol. 53, nr 7

22-24

EN

This paper presents a new design of an absorbing screen based on a classical Salisbury concept. In the new design a resistive sheet from the classical Salisbury screen is replaced by a patterned layer. This allows eliminating major disadvantages of classical solutions, such as their narrow frequency bandwidth and high overall screen thickness. Electromagnetic simulations with QuickWave - 3D package are performed and confirm the theoretical predictions of the paper.

PL

Artykuł prezentuje nowe podejście do struktur absorbujących, oparte o klasyczne rozwiązanie typu Salisbury. W zaproponowanej strukturze, jednorodna warstwa rezystywna zastąpiona została przez warstwę wzorów. Takie rozwiązanie pozwala na wyeliminowanie głównych wad klasycznych struktur, którymi są wąskie pasmo pracy oraz duża grubość panelu. Symulacje elektromagnetyczne potwierdzające słuszność przyjętej koncepcji, przeprowadzono w programie QuickWave - 3D.

3

Evaluation of electromagnetic absorbing capacity of materials in foundry industry

Nowak D., Stachowicz M., Pigiel M.

Archives of Foundry Engineering

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2010

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Vol. 10, iss. 1 spec.

237--242

EN

In the paper, a research on determining the standing wave ratio as a measure of electromagnetic absorbing capacity of moulding materials is presented. Preliminary tests performed using a microwave strip line showed that high-silica, chromite and magnesite moulding sands are characterised by low absorbing capacity of microwaves. It was demonstrated that microwave absorbing capacity is significantly affected by chemical compounds included in the examined substrates. It was found that use of a microwave strip line permits precise determining characteristic microwave absorbing capacities of various moulding materials and thus their suitability for microwave drying/hardening of moulds and cores or for other foundry processes. Such a microwave drier can be applied for identifying mass components and for determining e.g. base granularity by means of precisely determined reflection ratios |Γ| and positions of minimum signal values.

4

New generation of microwave absorbers

Tabaczyńska M., Wiśniewski A., Szugajew L.

Problemy Techniki Uzbrojenia

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2002

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R. 31, z. 82

83--91

EN

In the article, some aspects of using absorbers for increasing the value of Polish armament equipment are presented. Preliminary results of research of microwave absorber of new generation, paint coating type, put on armoured vehicle of battle-field reconnaissance, are presented. The parameters of this absorber suppresion, efficiently diminishing detection range by radar of vehicle with this absorber, are showed.

PL

W artykule przedstawiono niektóre aspekty zastosowania absorberów do podniesienia walorów bojowych polskiego sprzętu uzbrojenia. Zaprezentowano wstępne wyniki badań absorbera mikrofalowego drugiej generacji typu powłoka malarska, naniesionego na opancerzony pojazd rozpoznania pola walki. Pokazano parametry tłumienia tego absorbera, skutecznie zmniejszającego zasięg wykrycia pojazdu z tym absorberem przez radar.