Method of Experimental Determining of the Microwave Absorbing Properties of Composite Materials

Abubakarov, A. G.; Reyzenkind, J. A.; Лерер, А. М.; Kleshenkov, A. B.; Manuilov, M. B.; Pavlenko, A. V.

doi:10.1007/978-3-319-56062-5_18

Cited by 3 publications

(2 citation statements)

References 21 publications

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“…The waveguide method [25,26] is employed to measure the absorption of each composite in three different frequency bands. The method requires two waveguide adapters, a waveguide through/sample holder, and a vector network analyzer as shown in Fig.…”

Section: Waveguide Methodsmentioning

confidence: 99%

Design and Development of Radio Wave Absorber Using Eco-Friendly Materials

Manohar¹,

Pradeep²,

Mohanan³

2021

PIER M

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An investigation on using eco-friendly natural materials like coconut pith, rubber, and charcoal powder for developing radio wave absorbers has been reported in this paper. Two absorbers named CoR (Combination of Coconut pith powder and natural Rubber latex) and CoRC (Combination of Coconut pith powder, natural Rubber latex, and Charcoal powder) are made through proper mixing and drying. The absorptivity of these two absorbers (CoR and CoRC) is compared with the industrial standard polyurethane based absorber. The waveguide method is employed to measure the absorptivity of these absorbers in 3 different frequency bands. Band 1 (1.7-2.6 GHz) includes the mobile communication frequencies of 1.8 GHz and 2.4 GHz. Band 2 (4.9-7.05 GHz) is intended for sub 6 GHz band of 5G as well as WLAN frequencies while band 3 (8.2-12 GHz) is for higher frequencies of radar operation. The exact values of lower and upper frequencies of bands are determined by the physical dimensions of waveguides used. The absorption capability of the absorbers is found to increase as the frequency of operation increases. The CoR absorber has almost 63% average absorptivity in band 3, 56% in band 2, and 21% in band 1. The CoRC absorber has an average of 74% absorptivity in band 3, 63% in band 2, and 24% in band 1. Recently, many researchers have shown keen interest in developing radio wave absorbers from natural materials. This is due to the widespread requirement of absorbers for military, medical, and research purposes. Simón et al. in [10] have investigated the suitability of using powdered coir for microwave absorption application. The capability of microwave absorption is discussed in terms of its transmission characteristics (S 21) using the waveguide method in X band. A more comprehensive

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Section: Waveguide Methodsmentioning

confidence: 99%

Design and Development of Radio Wave Absorber Using Eco-Friendly Materials

Manohar¹,

Pradeep²,

Mohanan³

2021

PIER M

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“…The characteristic drift-speed electric field of the Gunn diode [2] Thus the Gunn Diode is an active device in the microwave field, which works as a converter of a direct voltage in a high frequency oscillating voltage (Fig. 2), by using the negative volume resistance characteristic presented by a category of composite semiconductors such as GaAs and InP [1]. The Gunn diode is one of the most important solid-body energy sources in the microwave field, which is characterized by low noise and a wide frequency range.…”

Section: Introductionmentioning

confidence: 99%

The voltage influence on the radiative power spectrum levels of Gunn diode in the microwave cavity resonator

Hutanu

2023

Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies XI

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Fluctuations in the level of the incident wave at the level of the measurement sample can lead to erroneous interpretations of the absorption domains. The paper attempts to draw some conclusions regarding the level changing of microwave radiation generated by the Gunn diode at various polarization voltages. This work described a signal level fluctuations as well as areas of unstable operation of the Gunn diode for various voltage values and frequency spectra.Gunn microwave spectrum, Dependence frequency/ voltage values, unstable operating mode.1.

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Determination of Transmission Coefficient and Electric Field Distribution of Rice Husk/ Pcl Composites Using Finite Element Method for Microwave Devices

Jimoh¹

2022

JANSET

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Material thickness is one factor that is considered in the selection of materials for usage in microwave applications. The demand for microwaves technology is widely needed in modern applications such as cellular telephone, satellite communication, radar system, global positioning system, and microwave remote sensing systems. Experiments and results abound for microwave properties determination for inorganic materials. Focus has recently been shifted to agricultural waste composite for microwave application. It is on this basis that this work primarily focuses on investigates microwave transmission coefficients and electric field visualization of different rice husk/PCL sizes placed inside a rectangular waveguide using the finite element method (FEM). Determination of the transmission coefficient for different thickness of rice husk/PCL composites were performed at X-band frequency using FEM. The thicknesses for the rice husk/PCL composites simulated were 10, 15, 20, 30, and 50 mm. The results of the simulation for the transmission coefficient revealed that the 50 mm composites had the lowest value of 0.148468 for the transmission coefficient at 12 GHz while the electric field visualization showed that the 50 mm composites have the least value of electric field intensity. The results confirms that the 50 mm thick sample absorbs the highest radiation. Based on the results obtained, all sample thickness can be used for microwave dummies.

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Method of Experimental Determining of the Microwave Absorbing Properties of Composite Materials

Cited by 3 publications

References 21 publications

Design and Development of Radio Wave Absorber Using Eco-Friendly Materials

Design and Development of Radio Wave Absorber Using Eco-Friendly Materials

The voltage influence on the radiative power spectrum levels of Gunn diode in the microwave cavity resonator

Determination of Transmission Coefficient and Electric Field Distribution of Rice Husk/ Pcl Composites Using Finite Element Method for Microwave Devices

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