Characterization of building materials for propagation modelling: frequency and time responses

Sagnard, Florence; Zein, Ghaïs El

doi:10.1016/j.aeue.2004.11.044

Cited by 11 publications

(8 citation statements)

References 19 publications

(25 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In general, the electrical properties of building materials are calculated from reflection and transmission characteristics measured in free space or reflection and transmission characteristics using coaxial cables [1,19,20]. In this paper, to analyze the electromagnetic transmission properties of environmentally friendly foamed concrete, we measured the permittivity and loss tangent by using coaxial cable measurement method and calculated the electromagnetic transmission characteristics.…”

Section: Electrical Properties Of Foamed Concretementioning

confidence: 99%

Electromagnetic Shielding Characteristics of Eco-Friendly Foamed Concrete Wall

Cho

Kim

Hong

2017

International Journal of Antennas and Propagation

View full text Add to dashboard Cite

The electromagnetic shielding characteristics according to the material composition of foamed concrete, which was manufactured to reduce environmental pollution and to economically apply it in actual building walls, were researched herein. Industrial byproducts such as ladle furnace slag (LFS), gypsum, and blast furnace slag (BFS) were added to manufacture foamed concrete with enhanced functionalities such as lightweight, heat insulation, and sound insulation. The electrical characteristics such as permittivity and loss tangent according to the foam and BFS content were calculated and measured. Free space measurement was used to measure the electromagnetic shielding characteristics of the actually manufactured foamed concrete. It was confirmed that electromagnetic signals were better blocked when the foam content was low and the BFS content was high in the measured frequency bands (1)(2)(3)(4)(5)(6)(7)(8) and that approximately 90% of the electromagnetic signals were blocked over 4 GHz.

show abstract

Section: Electrical Properties Of Foamed Concretementioning

confidence: 99%

Electromagnetic Shielding Characteristics of Eco-Friendly Foamed Concrete Wall

Cho

Kim

Hong

2017

International Journal of Antennas and Propagation

View full text Add to dashboard Cite

show abstract

“…The proposed measurement method is an alternative to other techniques also identify as in situ that consist of a mono-static configuration and the rotation of the obstacle within an anechoic chamber [19]. In those experiments, the authors used samples of the obstacles, instead of actual walls as in the work here.…”

Section: A Measurement Set-upmentioning

confidence: 99%

“…In those experiments, the authors used samples of the obstacles, instead of actual walls as in the work here. The results of experiments as related in [19] have been used to compute the complex permittivity of materials using reflection ellipsometry [20]. Although Fresnel-based analysis techniques [4] could not exploit the complete range of incidence angles, they appear to be less sensitive to the adequacy between the geometrical parameters of the setup and the physical properties of the sample.…”

Section: A Measurement Set-upmentioning

confidence: 99%

Depolarization Due to Scattering on Walls in the 5 GHz Band

Cuiñas

Sánchez

Alejos

2009

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

A measurement campaign has been designed and developed to test the polarization behavior of different obstacles when a 5 GHz radio wave reaches their surfaces from different angles of incidence, with two orthogonal polarizations in transmission. The measurement outcomes have been analyzed by means of a matrix procedure, which is inspired in the polarimetric matrix formulation. This method allows the computation of depolarization indexes. The results highlight a strong depolarization of waves. A set of depolarization indexes for specular direction is given for several angles of incidence and three different materials, with direct application to wireless local area networks planning. These results are interesting for radio systems planning to double the channel capacity, if orthogonally polarized transmissions are used, or to mitigate the signal fading, if diversity techniques are applied at reception.

show abstract

“…The working principle of these radars is based on transmitting at one or multiple frequencies and receive the reflected signals at or close to the harmonic frequencies as in Fig. 1 [1,2,3,4,5,6]. This work concentrates on the detection of hidden electronic devices such as electronic bugs.…”

Section: Introductionmentioning

confidence: 99%

P-N Jonksiyon Tespiti için Intermodülasyon Radarı

Aniktar¹

2018

SAÜ Fen Bilimleri Enstitüsü Dergisi

View full text Add to dashboard Cite

Intermodulation radar is a kind of harmonic radar. These radars not only receive the second and third harmonics but also intermodulation products of the transmitted multi-tone signal. These radars are useful for detection of non-linear electronics which are important for countersurveillance, and many other applications. The most important issue in these radars is to satisfy the low false alarm and correct detection. This work investigates the performances of the single tone harmonic radar and two-tone intermodulation radar in terms of the false alarm and correct detection rate by performing some experiments.

show abstract

Characterization of building materials for propagation modelling: frequency and time responses

Cited by 11 publications

References 19 publications

Electromagnetic Shielding Characteristics of Eco-Friendly Foamed Concrete Wall

Electromagnetic Shielding Characteristics of Eco-Friendly Foamed Concrete Wall

Depolarization Due to Scattering on Walls in the 5 GHz Band

P-N Jonksiyon Tespiti için Intermodülasyon Radarı

Contact Info

Product

Resources

About