scholarly journals Field Representation Microwave Thermography Utilizing Lossy Microwave Design Materials

Sensors ◽  
2021 ◽  
Vol 21 (14) ◽  
pp. 4830
Author(s):  
Christoph Baer ◽  
Kerstin Orend ◽  
Birk Hattenhorst ◽  
Thomas Musch
Keyword(s):  
Fluid Dynamics ◽  
Electromagnetic Fields ◽  
Dielectric Materials ◽  
Thermal Camera ◽  
Field Representation ◽  
High Loss ◽  
Electromagnetic Heating ◽  
X Band ◽  
Simple Estimation ◽  
Microwave Design

In this contribution, we are investigating a technique for the representation of electromagnetic fields by recording their thermal footprints on an indicator material using a thermal camera. Fundamentals regarding the interaction of electromagnetic heating, thermodynamics, and fluid dynamics are derived which allow for a precise design of the field illustration method. The synthesis and description of high-loss dielectric materials is discussed and a technique for a simple estimation of the broadband material’s imaginary permittivity part is introduced. Finally, exemplifying investigations, comparing simulations and measurements on the fundamental TE10-mode in an X-band waveguide are presented, which prove the above introduced sensing theory.

Broadband terahertz metamaterial absorber enabled by using high-loss dielectric materials

2019 ◽  
Vol 6 (10) ◽  
pp. 105804
Author(s):  
Ben-Xin Wang ◽  
Chao Tang ◽  
Qingshan Niu ◽  
Yuanhao He ◽  
Huaxin Zhu ◽  
...  
Keyword(s):  
Dielectric Materials ◽  
Metamaterial Absorber ◽  
High Loss ◽  
Broadband Terahertz

Elementary Theory of the Interaction of Electromagnetic Fields with Dielectric Materials

2015 ◽  
pp. 32-59 ◽  
Author(s):  
Yuri Feldman ◽  
Paul Ben Ishai ◽  
Alexander Puzenko ◽  
Valerică Raicu
Keyword(s):  
Electromagnetic Fields ◽  
Elementary Theory ◽  
Dielectric Materials

scholarly journals PENGGUNAAN MATEREIAL DIELEKTRIK BUATAN BERBASIS REKTANGULAR PATCH PADA ANTENA HORN UNTUK RADAR X-BAND

2021 ◽  
Vol 8 (1) ◽  
pp. 986
Author(s):  
M. Reza Hidayat
Keyword(s):  
Return Loss ◽  
Dielectric Material ◽  
Data Communication ◽  
Horn Antenna ◽  
Dielectric Materials ◽  
X Band ◽  
Measurement Results ◽  
Simulation Results ◽  
The Difference ◽  
The Waves

Dielectric materials play an important role in antennas in an effort to support data communication. The material used by the dielectric is usually not even one material, however, it is a combination of several dielectric materials. From the final simulation results, the antenna is obtained at a working frequency of 7.822 GHz with a return loss of -20.336 dB, a bandwidth of 830.6 MHz and a VSWR of 1.21. Whereas in the measurement results of the horn antenna using dielectric material that has been realized, it is found that the antenna is able to work at a frequency of 8.41GHz with a return loss of -13.31 dB, a bandwidth of 110 MHz, and a VSWR of 1.61. The difference in parameter results could be due to dimensional differences between the simulated antenna and the antenna that has been realized. The difference in parameter results could be due to dimensional differences between the simulated antenna and the antenna that has been realized. Measurements are not carried out in a closed room or specifically for measuring the antenna, thus allowing interference to the waves from the antenna being measured because the simulation results are made in ideal conditions.

scholarly journals A Novel Method Based on Two Different Thicknesses of The Sample for Determining Complex Permittivity of Materials Using Electromagnetic Wave Propagation in Free Space at X-Band

2017 ◽  
Author(s):  
Cuong Ho manh ◽  
Yem Vu van
Keyword(s):  
Dielectric Loss ◽  
Loss Tangent ◽  
Complex Permittivity ◽  
Dielectric Loss Tangent ◽  
Free Space ◽  
Propagation Constant ◽  
High Loss ◽  
Transmission Coefficients ◽  
X Band ◽  
Complex Propagation

In this paper, we present a method for determining complex permittivity of materials using two different thicknesses of the sample placed in free space. The proposed method is based on the use of transmission having the same geometry with different thicknesses with the aim to determine the complex propagation constant (γ). The reflection and transmission coefficients (S11 and S21) of material samples are determined using a free-space measurement system. The system consists of transmit and receive horn antennas operating at X-band. The complex permittivity of materials is calculated from the values of γ, in turns received from S11 and S21. The proposed method is tested with different material samples in the frequency range of 8.0 – 12.0 GHz. The results show that the dielectric loss tangent of low-loss material samples, the more accuracy of complex permittivity. However, the complex permittivity is slightly effected by the dielectric loss tangent of high-loss of material samples.

Study of the Difference between the Measurements of High-Loss Dielectric Materials When the Test Medium is Placed Inside or Outside the Waveguide

2013 ◽  
Vol 2 (1) ◽  
pp. 100-107
Author(s):  
V. V. Meriakri ◽  
◽  
M. P. Parkhomenko ◽  
I. P. Chepurnykh ◽  
S. S. Pleshanov ◽  
...  
Keyword(s):  
Dielectric Materials ◽  
Test Medium ◽  
High Loss ◽  
The Difference

scholarly journals Transverse electromagnetic fields in a detuned X-band accelerating structure

1995 ◽  
Vol 43 (6) ◽  
pp. 1335-1341
Author(s):  
S.A. Kheifets ◽  
S.A. Heifets ◽  
B. Woo
Keyword(s):  
Electromagnetic Fields ◽  
X Band ◽  
Accelerating Structure ◽  
Transverse Electromagnetic
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