Resonance properties of 3D-printing hexagonal structures at Sub-THz frequency range

2020 ◽  
Author(s):  
A.V. Badin ◽  
K.V. Simonova ◽  
G.E. Kuleshov ◽  
D.D. Teterina ◽  
G.E. Dunaevskii
Keyword(s):  
3D Printing ◽  
Frequency Range ◽  
Resonance Properties

scholarly journals Using additive technologies to create broadband antennas with fractal geometry

2021 ◽  
Vol 13 (4) ◽  
pp. 427-434
Author(s):  
Andrey V. Smirnov ◽  
◽  
Alexander S. Fionov ◽  
Ilia A. Gorbachev ◽  
Elizaveta S. Shamsutdinova ◽  
...  
Keyword(s):  
3D Printing ◽  
Frequency Dependence ◽  
Fractal Geometry ◽  
Additive Technologies ◽  
Copper Coating ◽  
Frequency Range ◽  
Resonant Frequencies ◽  
Printing Technology ◽  
Broadband Antennas ◽  
3D Printing Technology

The paper presents the results of a study of the frequency dependence of the S11 parameters of antenna samples with fractal geometry, created using 3D printing technology, followed by the deposition of a conductive copper coating by galvanization. It is shown that changing the dimension of the fractal at different iterations, shifting and dividing the resonant frequencies, it is possible to flexibly form the working bands of antennas in any frequency range and any width. The developed designs can be used to create broadband rectennas.

scholarly journals Dielectric Coupler for General Purpose Q-Band EPR Cavity

2021 ◽  
Author(s):  
Martyna Judd ◽  
Greg Jolley ◽  
Dieter Suter ◽  
Nicholas Cox ◽  
Anton Savitsky
Keyword(s):  
General Purpose ◽  
Wide Frequency Range ◽  
Critical Coupling ◽  
Frequency Range ◽  
Dielectric Plate ◽  
Coupling Element ◽  
Microwave Frequencies ◽  
High Q ◽  
Resonance Properties ◽  
Second Mode

AbstractHere, we report on a robust and efficient mechanism for tuning the microwave coupling of a Q-band (34 GHz), general purpose, cylindrical EPR cavity operating in the TE011 mode. This novel mechanism allows for both the adjustment of the cavity’s coupling over a wide frequency range, as well as its bandwidth from that of a high-Q cavity (about 10 MHz), to a broadband cavity (above 1 GHz). The coupling element consists of a dielectric plate fixed onto a movable waveguide short that allows for two modes of operation. In the first mode, the dielectric plate does not influence the resonance properties of the coupling iris and allows for precise, critical coupling of the high-Q cavity. In the second mode, the dielectric plate is positioned in front of the coupling iris, varying the iris’ resonance properties and allowing very strong overcoupling to be achieved. This mechanism can be generalized for other types of EPR cavities, in particular at high microwave frequencies.

scholarly journals Моделирование резонансов диэлектрических сфер в терагерцевом диапазоне

2018 ◽  
Vol 44 (16) ◽  
pp. 75
Author(s):  
Д.В. Стороженко ◽  
В.П. Дзюба ◽  
Ю.Н. Кульчин
Keyword(s):  
Field Vector ◽  
Radiation Wavelength ◽  
Terahertz Frequency ◽  
The Finite Element Method ◽  
Frequency Range ◽  
Terahertz Frequency Range ◽  
Dielectric Sphere ◽  
Resonance Properties ◽  
Dielectric Spheres ◽  
A Current

AbstractWe have studied the resonance properties of dielectric spheres with subwavelength dimensions in the optical and terahertz frequency range. Distribution of the electric field vector in a sphere irradiated by a plane polarized wave has been numerically simulated using the finite element method. The obtained results clearly demonstrate that it is in principle possible to use resonances of various orders in dielectric spheres for the amplification of current in a conducting antenna with dimensions several times smaller than the radiation wavelength. In the case of resonances within short spectral intervals, it is possible to provide a current density gain up to 25–30 dB as compared to that in the absence of a dielectric sphere surrounding the antenna.

scholarly journals Electromagnetic response from composite carbon-containing structures with technological inhomogeneities at EHF

2021 ◽  
Vol 2140 (1) ◽  
pp. 012010
Author(s):  
E A Trofimov ◽  
G E Kuleshov ◽  
V D Moskalenko ◽  
A V Badin ◽  
K V Dorozhkin
Keyword(s):  
3D Printing ◽  
Transmission Coefficient ◽  
Composite Structures ◽  
Electromagnetic Response ◽  
Frequency Range ◽  
Absorption Coefficients ◽  
Polymer Volume ◽  
Composite Carbon ◽  
Frequency Dependences

Abstract The results of studies of the electromagnetic response from composite structures made of a carbon-containing polymer with the inclusion of spherical pores in the bulk of the material and with pyramidal corrugation on the surface of the material are presented. The results of modeling the frequency dependences of the transmission, reflection and absorption coefficients in the EHF range are shown. Samples of composite carbon-containing structures with technological inhomogeneities have been fabricated by 3D printing. Measurements of the electromagnetic response from experimental samples were carried out in the frequency range from 100 to 1000 GHz. At frequencies up to 250 GHz, the inclusion of air pores in the polymer volume reduces the transmission coefficient, practically does not affect the reflection, and increases the absorption. Pyramid corrugated material absorbs more than 99% of radiation in the frequency range from 200 to 635 GHz.

scholarly journals Study of 3D-Printed Dielectric Barrier Windows for Microwave Applications

Electronics ◽  
2021 ◽  
Vol 10 (18) ◽  
pp. 2225
Author(s):  
Mikhail D. Proyavin ◽  
Dmitry I. Sobolev ◽  
Vladimir V. Parshin ◽  
Vladimir I. Belousov ◽  
Sergey V. Mishakin ◽  
...  
Keyword(s):  
3D Printing ◽  
Frequency Band ◽  
Frequency Range ◽  
3D Printed ◽  
Microwave Applications ◽  
Materials Used ◽  
Manufacturing Technologies ◽  
Styrene Butadiene ◽  
Power Microwave ◽  
Butadiene Styrene

3D printing technologies offer significant advantages over conventional manufacturing technologies for objects with complicated shapes. This technology provides the potential to easily manufacture barrier windows with a low reflection in a wide frequency band. Several 3D printing methods were examined for this purpose, and the dielectric properties of the various types of materials used for 3D printing were experimentally studied in the frequency range 26–190 GHz. These measurements show that the styrene-butadiene-styrene and polyamide plastics are suitable for broadband low-reflection windows for low-to-medium-power microwave applications. Two barrier windows with optimized surface shapes were printed and tested. Results demonstrate that the studied technique can fabricate windows with a reflection level below −18 dB in the frequency band up to 160 GHz. Studied windows can be used for spectroscopic tasks and other wideband microwave applications.

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